Datasets:

cwinkler

/

patents_green_plastics

like 1

a bowed framed membrane is disclosed for use in automated direct blot electrophoresis and subsequent membrane process steps to develop a chemiluminescent image of the resultant blot of selected fragments and to detect that image . a frame made from a thin rigid plastic plate such as polyethylene is provided with a window . a membrane covers that window and is bonded on two opposing sides only while the frame is held in a bowed condition . the membrane is maintained under tension during processing by the bowing permitting processing at the elevated temperatures used in molecular biological procedures without loss of flatness . processes for preparing such frames and various utilities are also disclosed .

a method for producing a hydrogel / fibre composite comprises : impregnating fibres of a fibrous material with a precursor solution comprising at least one polymerisable , and optionally also crosslinkable , monomer such that at least partial swelling of the fibres takes place ; and polymerising , and optionally also crosslinking , the at least one monomer after impregnation and at least partial swelling of the fibres such that the integrity of the fibrous material is at least partially preserved in the resulting hydrogel / fibre composite , provided that the crosslinking is not initiated solely by cation release from the fibres of the fibrous material . the invention provides a hydrogel / fibre composite prepared or preparable by the said method . the hydrogel / fibre composite may be adhesive to human skin with good properties of performance and subsequent painless removal . the composite is found to maintain acceptable strength and structural integrity on hydration or across one or more hydration / dehydration cycle , and thus finds use in , for example , biomedical products where this property is required .

the invention relates to a vehicle seat for equipment with shoulder belts connected to the seat backrest , comprising an energy absorbing device acting on the seat backrest , wherein said energy absorbing device comprises deformable energy absorbing means , with at least one arcuate area of plastically fragmentable material , opposing the rotation of said seat backrest with respect to a lower seat structure in a first direction , corresponding to a forward - leaning movement of said seat backrest . the invention also relates to energy absorbing devices opposing the rotation of a first part with respect to a second part via deformable energy absorbing means with an arcuate area of plastically fragmentable material , wherein the energy absorbing device comprises releasable retention means subjecting every rotation of said first part with respect to said second part into a first direction to the reaction of said energy absorbing means and allowing the rotation of said first part with respect to said second part , into the direction opposite to said first direction , without acting on said energy absorbing means .

method for coinjecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic material having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source to a mold cavity .

the present invention relates to crosslinking of porous materials made of biodegradable polymers . the method comprises : placing a porous biodegradable polymer in a chamber ; introducing a supercritical fluid containing a crosslinking agent into the chamber to effect crosslinking of the porous biodegradable polymer ; and optionally introducing a pure supercritical into the chamber to wash the crosslinked polymer until the crosslinking agent is substantially removed from the polymer .

a method for applying a polymer to a substrate having a first surface and a second surface . one or more apertures are provided through the substrate , with the apertures linking the first and second surfaces . a polymer coating is applied to the first and second surfaces , with some of the polymer coating flowing into and remaining within the aperture . the polymer coating within the aperture serves to link the polymer coating covering the first surface and the polymer coating covering the second surface . the invention also encompasses coated objects made using the inventive method .

microparticles and nanoparticles prepared from oppositely charged polymers are provided in which a drug is incorporated into the core and is conjugated to one polymer by a schiff - base crosslink . the particles are suitable for use in injectable formulations in which the rate of release of the drug through the particle shell is slowed as compared to noncrosslinked drugs . enzymatically degradable polymers can be incorporated in otherwise hydrolytically stable particles to provide drug release at particular sites within the body where the enzyme of interest is present .

a preformed web and a method of producing dunnage units from the preformed web . the web is an elongate flattened thermoplastic tube having an inflation edge and an opposite edge . the tube includes spaced transverse seals that define sides of pouches . in one embodiment , the web is configured such that a gap forms between each pair of adjacent pouches when the pouches are inflated . in one embodiment , an inflation edge of the web comprises a frangible connection that allows the inflation edge to be broken by an unsharpened object .

the instant invention involves the use of a combination of preparatory steps in conjunction with mass spectroscopy and time - of - flight detection procedures to maximize the diversity of biopolymers which are verifiable within a particular sample . the cohort of biopolymers verified within such a sample is then viewed with reference to their ability to evidence at least one particular disease state ; thereby enabling a diagnostician to gain the ability to characterize either the presence or absence of said at least one disease state relative to recognition of the presence and / or the absence of said biopolymer .

this invention is directed to a method and apparatus using polymerase chain reaction technology for collecting air samples and identifying biological agents in the air sample . the apparatus is capable of detecting transient events such as bacillus anthracis in a piece of mail being processed on high - speed mail processing equipment . the system includes apparatus for implementing the following features : particle collection and pre - separation using a collection hood and dry cyclone passive filtration system ; continuous particle collection into a liquid sample ; automated fluid transfer to a pcr analysis cartridge ; and pcr biological identifier apparatus for detecting a bio - agent in a piece of mail following manual transport of the cartridge to the identifier apparatus ; retesting of the liquid sample upon various error conditions ; confirmation testing upon preliminary positive results ; fluid transfer to archive containers at the completion of analysis ; and , notification / reporting system to alert designated personnel / organizations upon the occurrence of selected events such as the presence of bacillus anthracis .

this invention is related to the use of polyurethane - based polymer as a drug delivery device to deliver biologically active compounds at a constant rate for an extended period of time and methods of manufactures thereof . the device is very biocompatible and biostable , and is useful as an implant in patients for the delivery of appropriate bioactive substances to tissues or organs .

a pallet for receiving and transporting loads , having an upper platform for receiving the loads and block - like or strip - like support elements which are attached to or can be attached to its underside by connecting sections . at least the support elements are made of plastic with fiber material embedded therein . advantageous shock absorbing properties , along with an advantageous structure , are achieved because the fiber material consists of natural fibers .

an injection molded thermoplastic closure for a container having a generally planar wall and an integrally molded push - in tab within the area of the wall . the push - in tab has its boundary formed by discontinuities in the closure wall and the discontinuities are hermetically closed with a sealant applied locally in an arcuate pattern by rotation of the closure relative to a sealant applicator . a hinge line of the push - in tab has a construction that improves hinge integrity .

the present invention provides a sustained release latanoprost implant in the form of a thin film comprising latanoprost incorporated in a biodegradable polymer matrix . preferably , said implant is an intraocular implant comprising a thin film comprising latanoprost incorporated in a biodegradable polymer matrix wherein said implant is configured as a disc or a rolled film that can be inserted into the eye and unrolls to provide a film having a high surface area to volume ratio .

a process is described for treating waste plastics material to provide at least one on - specification fuel product . plastics material is melted and then pyrolysed in an oxygen - free atmosphere to provide pyrolysis gases . the pyrolysis gases are brought into contact with plates in a contactor vessel so that some long chain gas components condense and return to be further pyrolysed to achieve thermal degradation . short chain gas components exit the contactor in gaseous form and proceed to distillation to provide one or more on - specification fuel products . a pipe directly links the pyrolysis chamber to the contactor , suitable for conveying upwardly - moving pyrolysis gases and downwardly - flowing long - chain liquid for thermal degradation .

a method for creating a barrier to protect wood materials for house construction or wooden structures such as houses from humidity , moisture and / or biological attacks , such as wood decaying fungi and termites , is disclosed . the method is to treat wood itself or , preferably , the ground surface under the floor with a liquid containing a synthetic resin emulsion and an anti - fungal and wood - preservative agent and / or a pesticide such as termite - controlling agent , and further , a foaming agent . the barrier contains a selected copolymer of vinyl acetate and a polyurethane polymer .

novel catalytic compositions are disclosed comprising novel unsymmetrical metallocene catalytic compounds . also disclosed are uses of such catalytic compositions in olefin polymerisation reactions , as well as processes of polymerising olefins . when compared with the prior art compositions , the catalytic compositions of the invention are markedly more active in the polymerisation of olefins .

ethylene - carbon monoxide copolymer compositions are stablized against degradation by the incorporation therein of manganous salts of phosphorus oxy acids .

a two honing process eliminates the need for subsequent brush honing at another location . the honing process which is accomplished with a single head uses rough honing stones or tools for the initial phase , and finishing tools of tightly compacted abrasive containing plastic monofilaments for the second phase . the phases may be contiguous , slightly spaced , or preferably overlap for up to about one - half of the rough honing phase . when the finishing honing tools are operating alone , the angle of movement of the tools is somewhat askew of the oil retaining ridges and grooves formed by the rough honing operation . with the process , the oil bearing surfaces have improvements in plateau finish and surface topography , avoid abrasive contamination caused by hard finishing tools , and obtain such improvements in a more economic manner .

a molded plastic utility cart includes a one - piece hollow molded frame filled with a foamed plastic material , the frame being generally i - shaped in configuration and including an upstanding wall with a generally horizontal base at its lower end and a generally horizontal top at its upper end defining an open - top receptacle . a plastic cover is slidably mounted on the top for movement between a closed position covering the receptacle and an open position extending laterally from the top and uncovering the receptacle . the cover itself defines additional receptacle compartments . accessory article supports may be mounted on any of the upstanding wall portion , the base or the top , and may be in the nature of additional receptacles , tool hangers or the like . a plurality of caster wheels are mounted on the underside of the base and handles are provided at both ends of the top .

biodegradable and resorbable polymer pouches are described for use with cardiac rhythm mamagent devices and other implantable medical devices , i . e ., a pouch , covering , or other receptacle capable of encasing , surrounding and / or holding the crm or other imd for the purpose of securing it in position , inhibiting or reducing bacterial growth , providing pain relief and / or inhibiting scarring or fibrosis on or around the crm or other imd . optionally , the biodegradable and resorbable pouches of the invention include one or more drugs in the polymer matrix to provide prophylactic effects and alleviate side effects or complications associated with the surgery or implantation of the crm or other imd .

in some embodiments , without limitation , the invention comprises a micromachined probe with one or more buried flow microchannels , where at least one of the microchannels is filled with an organic polymer . in some additional embodiments , the invention comprises a micromachined probe having at least a portion of one external surface coated with an organic polymer . the internally or externally applied organic polymer increases the buckling strength of the micromachined probe and decreases the risk of fracture of the probe , or movement or migration of broken fragments , during insertion , use , or removal from biological tissues .

heat is applied to a heat sealable material which may be in the form of a bag , for example , to seal a portion of the bag . this may be the top , bottom or side of the bag , and one form of heat sealable material is a plastic film such as polyethylene , either as a coating on the inside of a paper kraft bag or as a separate ply . the two portions to be heat sealed are juxtaposed and passed between endless metal bands which move in synchronism with the heat sealable material as a part of the conveyor means for the heat sealable material . heat is imparted to the heat sealable material from the metal bands and it is imparted to the metal bands by electrical current conducted into the bands by collector rings on the pulleys over which the metal band is entrained . the heat is conducted through the kraft ply to the heat sealable material to cause the two portions to be sealed together . the foregoing abstract is merely a resume of one general application , is not a complete discussion of all principles of operation or applications , and is not to be construed as a limitation on the scope of the claimed subject matter .

a method of making a new type of biomaterials , biodegrable crosslinked urethane - containing polyester elastomers and a scaffold - sheet engineering method for tissue engineering applications is provided . cupes can be synthesized by forming a linear pre - polymer , which is a polyester , introducing the urethane bonds into polyester using a diisocyanate as a linker , and crosslinking the resulting urethane containing linear polymers to form cupes via post - polymerization . this family of polymers , cupes , exhibit excellent biocompatibility with desired degradation . tissue engineering scaffolds made of cupes are soft and elastic , and have good mechanical strength . complex tissue grafts can be constructed by a novel layer - by - layer scaffold - sheet engineering design using cupe sheets . cupe scaffolds can provide openings for cell to cell communication across scaffold layers and angiogenesis into the depth of the construct . biomolecules , such as anticoagulants , can be incorporated into the cupe polymers , increasing their viability as vascular graft scaffolds .

this mechanism offers a simple solution wherein an axial movement of a grooved piece brings about a radial movement of rigid balls that grip and deform a pipe that is initially in a plastic state . depending on the geometry of the channels of the grooved piece , a variable grip is achieved . this gripping operation is simply released as the grooved piece returns to its initial position , the pipe itself now being in a solid state , so that the balls are returned to their initial position . the correct position for gripping the plastic pipe can be detected by a detector . the pressurisation of the plastic pipe can be achieved thanks to an elastic joint on the piece that surrounds the pipe .

the side wall portion of a plastic article as a plastic container , is opaque and includes a transparent portion , as a view stripe . the opaque portion limits viewing the inside of the article , whereas the transparent portion permits viewing the inside of the article therethrough . a method for forming the plastic article is also disclosed .

a method of making a porous biodegradable polymer is disclosed , which comprises placing a biodegradable polymer and a solvent in a chamber ; adding a supercritical fluid to the chamber and maintaining the chamber at a predetermined temperature for a sufficient period of time to allow the supercritical fluid to dissolve into the biodegradable polymer with the help of the solvent ; and venting the supercritical fluid and the solvent by reducing the pressure in the chamber , thereby obtaining a porous biodegradable polymer .

a lens array of rod lenses , to be used for reading image data in document copier , facsimile , printer , white board scanner , and so on , is made by injection molding of a transparent resin in an already made plastic lens - holding frame having an array of through - holes and gates leading to respective through - holes for injecting melted transparent resin therethrough , both ends of the through - holes having cores and with concave faces .

the object of the present invention is to provide a joint prosthesis , bearing material and a production method thereof , which suppresses wear in a sliding section and suppresses the production of abrasive powder even during repeated daily operation . to achieve the object , there is provided a biomaterial comprising : a substrate made of metal , alloy or ceramic ; and a biocompatible material layer laminated on the substrate , wherein hydroxyl groups are formed on the substrate by surface - treating , while the biocompatible material layer comprises a polymer containing phosphorylcholine groups , the substrate and the biocompatible material layer are bound via a binder layer which is combined with the hydroxyl groups of the substrate and with the biocompatible material layer .

an absorbable crystalline , monocentric polyaxial copolymer comprising a central carbon or nitrogen atom and at least three axes , each of which includes an amorphous flexible component adjacent and originating from the central atom and a rigid , crystallizable component extending outwardly from the amorphous , flexible component is disclosed along with the use of such copolymer in medical devices which may contain a bioactive agent . the present invention also relates to a suture , stents , stent mantles and sealing devices made from the polyaxial copolymer .

a process is disclosed for regenerating a spent liquid acid catalyst comprising the steps of : providing a spent liquid acid catalyst comprising hf , sulfolane , and conjunct polymeric byproducts formed during the hf - catalyzed reaction of isoparaffin and olefin to form isoparafinnic alkylate ; providing a finely divided solid sorbent , wherein said solid sorbent preferentially and reversibly sorbs said conjunct polymeric byproducts from a mixture containing hf , sulfolane ; mixing said spent liquid acid catalyst of step with said solid sorbent of step by charging said spent liquid acid catalyst to the driving fluid inlet of an eductor and drawing a stream containing said solid sorbent into said eductor ; holding said mixture of step in contact for time sufficient for said solid sorbent to preferentially sorb at least a portion of said conjunct polymeric byproducts from said spent liquid acid catalyst to produce a conjunct polymer - enriched sorbent and to regenerate said liquid acid catalyst ; and separating said conjunct polymer - enriched sorbent from said regenerated liquid acid catalyst ; soaking said conjunct polymer - enriched sorbent in a solvent to desorb said conjunct polymeric byproducts ; and recycling said solid sorbent to said mixing step .

the invention provides a cyclomonomer having actin - binding activity . the cyclomonomer is of utility for the study of the molecular biology of actin polymerization . the cyclomonomer is also useful for the study of and treatment of the toxic effects of amanita sp . poisoning .

a synthetic thermoplastic polymeric compound is structurally stable during its useful life and which upon introduction into a suitable environment , degrades under chemical , photochemical and biodegradation mechanisms into innocuous products . stabilizers may be incorporated into the thermoplastic polymer to help maintain the structural and functional integrity through the useful life of the product . degradation is then brought about by the synergistic interaction of the biodegradable component , an oxidizable component , transition metal additives and an aromatic ketone incorporated into the thermoplastic polymer . in the degradation process , the biodegradable component is metabolized to expose the thermoplastic polymer surface to chemical attack . in addition , the oxidizable component in conjunction with the catalytic system effects oxidative breakdown of the thermoplastic polymer to give lower molecular weight fragments that are susceptible to enzymatic attack in the decomposition environment . the result is the complete breakdown of the thermoplastic polymer into innocuous products . the chemical , photochemcial , and biodegradation mechanisms comprising the degradation process occur both sequentially and simultaneously in cooperative , synergistic action to bring about the desired result .

formulations for controlled , prolonged release of bioactive molecules such as therapeutic proteins , peptides and oligonucleotides have been developed . these formulations are based on solid microparticles or nanoparticles formed of the combination of biodegradable , synthetic polymers such as poly , poly , and copolymers thereof . bioactive molecules are coupled to hydrophilic polymers such as polyethylene glycol or polypropylene glycol and formulated to provide controlled release . the bioactive molecules are more stable , less immunogenic and have improved release rate profiles with lower burst levels and increased drug loading relative to the same bioactive molecules lacking coupled hydrophilic polymers . the controlled release formulations can be administered by injection , by inhalation , nasally , or orally .

highly concentrated , water - based dispersions of certain lipophilic and / or hydrophobic antimicrobially active materials are stabilized to a surprising degree by a surfactant combination including a nonionic acrylic graft copolymer surfactant and a alkoxylated polyarylphenol phosphate ester surfactant . the active materials may be present in dispersion concentrates of the present invention singly or in useful combinations . the active materials are selected from the group of fungicides and bactericides consisting of 1 , 2 - benzisothiazol - 3 - one ; 2 - octyl - 2h - isothiazol - 3 - one ; 5 - chloro - 2 - methyl - 2h - isothiazol - 3 - one ; 2 - methyl - 2h - isothiazol - 3 - one ; pyrithione zinc ; 3 - iodo - 2 - propynyl butylcarbamate ; 2 - methylthio - 4 - ethylamino - 6 - tert - butylamino - s - triazine ; and 3 -- 1 , 1 - dimethylurea , and mixtures thereof . the dispersion concentrates may be efficiently shipped and stored , and subsequently diluted with water to produce less concentrated dispersions when desired . even at relatively high concentrations , the dispersion compositions of the present invention can be stored for months or years without significant loss of stability .

a method for the treatment of a kaolin clay crude to separate by selective flocculation impurity particles contained in the crude from finely divided kaolinite particle contained in the crude , comprising : forming said crude into a dispersed aqueous slurry b adding water and at least one dispersant to said crude ; conditioning said dispersed aqueous slurry by adding conditioning chemical thereto , the conditioning chemical providing addition of monovalent cations to the slurry without adding multivalent cations thereto ; selectively flocculating said conditioned slurry by adding to said conditioned slurry a composition comprising a high molecular weight component comprising an organic anionic polymer having a molecular weight of at least 1 million ; and a low molecular weight component comprising an inorganic anionic polyphosphate ; said composition causing impurity particles in said slurry to flocculate and settle as a dense lower layer and kaolinite particles in said slurry to be deflocculated and concentrated in an upper layer above said lower layer ; and separating said lower layer and said upper layer ; and wherein the use of said composition in step increases the yield of said kaolinite particles in said upper layer .

the present invention relates to polymeric compositions useful in the manufacture of biocompatible medical devices . more particularly , the present invention relates to certain hydrophilic monomers capable of polymerization to form polymeric compositions having desirable physical characteristics useful in the manufacture of ophthalmic devices . the polymeric compositions comprise polymerized hydrophilic siloxanyl monomers .

a fastener system includes a toy product , a support platform , and a plug that engages a keyhole formed into the product . the plug includes a base and a pronged key extending from the base . the support platform includes a through - hole that permits the passage of the key into the packaging . one or more integrally - formed biasing members are located on the base of the plug to draw the key toward the product and create a secure connection . the pronged key may be formed from a plastic material and configured such that it plastically deforms but remains attached to the key when and predetermined force is applied to the key to pull the key from a misaligned position with respect to the key hole .

a reuseable plastic cap is disposed over a seal closure on a vial neck to retain the seal closure in place thereon , the cap comprising a body of resilient material having a base overlying the seal closure , opposed jaws on the base for gripping a bead on the vial neck , gripper flanges for manual engagement to spread apart the jaws so as to install or remove the cap on the vial neck , and a releasable locking bar to hold the gripper flanges spread apart and thereby retain the jaws in a locked condition on the vial neck .

in order to produce a packaging for a sink which has particularly good absorption properties and a low rate of transportation damage there is proposed a packaging for a sink which comprises at least one supporting body that is formed at least partly from a foamed plastic material and comprises at least one seating element incorporating a seating channel for an edge section of the sink , and an outer packaging whose interior accommodates the sink and the at least one supporting body , wherein the at least one supporting body extends over substantially the entire internal height of the interior of the outer packaging .

a method is described for the amperometric determination of the concentration in a biological sample of a constituent which is a substrate for an oxidase enzyme by catalyzing the substrate with the enzyme , thereby consuming o 2 and producing h 2 o 2 and measuring the o 2 consumption or h 2 o 2 production by means of an inert metal indicator electrode intimately coated with a thin film of a perfluorosulfonic acid polymer . a reaction chamber is described which provides means for contacting the sample with the enzyme and means for making amperometric measurements utilizing inert metal indicator electrodes coated with a thin film of a perfluorosulfonic acid polymer .

a polycarbonate - polyester block copolymer includes a polycarbonate block and a polyester block , each having specific structures . the block copolymer can be prepared , at least in part , from renewable feedstocks . in some forms , the block copolymer includes biodegradable segments that facilitate structural breakdown of objects molded from the block copolymer . methods of preparing the block copolymer are described as are - compositions that include it and articles prepared from it .

a pallet base stacked with commodities for wrapping is positioned on a horizontal platform , whereupon the wrapping operation is effected by an l - profile beam carrying a roll of plastic film and rotatable about a vertical axis in such a way as to circle the platform and wind the film around the pallet ; to advantage , the horizontal member of the beam lies below the uncoiling roll of film , passing between the platform and a horizontal bed afforded by the stationary frame of the apparatus , such that with the l - beam set in rotation about the main axis a low center of inertia is achieved .

hard substrates such as ophthalmic lenses or molds are coated with a uv curable monomer which is polymerized to construct a scratch resistant coating on a surface of the lens . the present invention is directed to an apparatus for and method of applying the uv curable monomer to the surface of the ophthalmic lens or mold . polymerization of the monomer occurs by radiation of uv light while the lens is encased in a curing chamber . the spin coater of the present invention has the following advantages : excess monomer is collected in a dish away from uv exposure and is readily disposed of . the substrate is revolved at a high rate of speed during the application of the coating to achieve a uniform coating of monomer . only the holder and substrate are moved to the curing chamber minimizing the items exposed to uv light . the uv light is electrodeless , it has a standby mode and operates cyclically during use so as to prolong its life and to allow a greater degree of control over extent of polymerization . operation of the apparatus occurs automatically and can be performed by using pneumatic as well as electronic circuits .

a resorbable interbody fusion device for use in spinal fixation is disclosed . the device is composed of 25 – 100 % bioresorbable or resorbable material . the interbody fusion device of the invention can be in any convenient form , such as a wedge , screw or cage . preferably , the resorbable device of the invention is in the shape of a tapered wedge or cone , which further desirably incorporates structural features such as serrations or threads better to anchor the device in the adjoining vertebrae . the preferred device further comprises a plurality of peripheral voids and more desirably a central void space therein , which may desirably be filled with a grafting material for facilitating bony development and / or spinal fusion , such as an autologous grafting material . as the preferred material from which the resorbable interbody fusion device is manufactured is most likely to be a polymer that can produce acidic products upon hydrolytic degradation , the device preferably further includes a neutralization compound , or buffer , in sufficiently high concentration to decrease the rate of ph change as the device degrades , in order to prevent sterile abscess formation caused by the accumulation of unbuffered acidic products in the area of the implant .

a live bacteria product including dormant viable bacteria suspended in a liquid carrier . the liquid carrier is sufficiently devoid of moisture so that substantially all of the bacteria will remain in a dormant state for several months or until applied to the target host . the carrier contains mineral oil and polymers and may also include an adsorbent . the product is stored and shipped in a plastic bag and is sprayed onto its target host or the like . the moisture and ph of the target host then activates the bacteria .

bioplastics including an oligosaccharide , a plasticizer , and an additive are described . such bioplastics display advantageous attributes including tensile strength that can be tailored for particular uses . processes for obtaining such bioplastics are also described .

an antigen delivery system utilizing a biodegradable polymer with good mechanical properties in combination with a material stimulating the immune system . the material having adjuvant activity may be polymer degradation products or an adjuvant which is contained within or bound to the polymer . in one embodiment , the polymer is formed from tyrosine dipeptides . poly is a preferred tyrosine dipeptide polymer for constructing implantable delivery systems for antigenic material . the polymer is not an adjuvant in itself but degrades into products which stimulate the immune system . the tyrosine dipeptide can also be used as a conventional adjuvant . the advantages of the system are that a polymer can be used to form a biodegradable integral structure which is useful as both an implantable source of an antigen or other biologically active compound and as a control means for the rate of release of the biologically active compound , wherein the result is sustained , relatively constant delivery of antigen with simultaneous stimulation of the immune response .

a mushroom - type hook strip for a hook - and - loop fastener has a flexible backing of thermoplastic resin and , is integral with backing , an array of upstanding stems distributed across at least one face of the backing , each having a mushroom head . the stems have a molecular orientation as evidenced by a birefringence value of at least 0 . 001 . the mushroom - type hook strip can be produced continuously by injecting resin into cavities of a cylindrical mold while evacuating and cooling the cavities so that the cooled resin becomes molecularly oriented , thus affording to the stems excellent stiffness , durability , and tensile and flexural strength .

there is disclosed a novel mixture of polyhydroxy phenolic curing agents , such as novolac resins blended with a mixture of mono , bis and tris hydroxyaryl phosphine oxides for co - curing epoxy resins and imparting flame resistance thereto . a preferred composition includes a mixture of monohydroxyaryl , bishydroxyaryl and trishydroxyaryl phosphine oxide and a benzoguanamine / phenol / formaldehyde terpolymer which is used along with an epoxy resin to produce flame - resistant printed wiring boards without the use of halogens .

a spin or friction welding apparatus which can accurately locate a container such as a semirigid plastic bottle with respect to an overcap which is to be frictionally welded to the bottle by means of a rotatable spindle member . in order to assure that the overcap is secured to the bottle neck when employing high production machinery utilizing a rotating spindle mechanism for frictionally engaging the cap on a stationary bottle , many tolerances must be compensated for in the dimensions of the cap , the size of the neck on the container , as well as the positioning of the cap in relation to the container . to compensate for these variables , a biasing means is provided in conjunction with the rotatable spindle member so as to effect a predetermined tension on the cap member when it engages the stationary container neck and is spun into frictional engagement with it . further , means are provided in the form of oppositely disposed jaw members with surfaces to surround the neck of the container and position it precisely in axial alignment with the rotatable member . to further assure proper alignment during frictional engagement of the cap and the container neck , the support means for the container is moved out of position so that the only vertical support of the bottle is by means of these jaw members which contact the lower surface of the rib on the container neck . this support contact prevents vertical deformation and horizontal deflection of the bottle and rotation of the bottle is prevented by means of lateral wall members .

the lightweight component is equipped with two cover layers , which are made of a wood material , for example , and a filling disposed in between said layers after cutting everything to size , having an edge support comprising thermoplastic material . this is done in that the edge support is anchored both in the first cover layer and in the second cover layer starting from the narrow side , wherein the anchoring is achieved in that the edge support is brought into contact with the respective cover layer and mechanical vibrations are coupled into the edge support by a sonotrode engaging from the narrow side , wherein the edge support at the same time is pressed against the cover layer such that in the region of a transition between the thermoplastic material and the wood material of the cover layer part of the thermoplastic material is liquefied and pushed into the cover layer material , thereby producing a positively engaged anchoring after hardening .

an apparatus for packing fowl which includes first and second work stations . the first work station is provided to receive the product to be packaged . a pusher mechanism pushes the product from the first station between spaced plates into a plastic bag and then through the gates of a clipper mechanism . advancement is slightly retarded by means of a blocking mechanism to thereby insure that the product is tightly retained within the flexible plastic bag . the bag and product are thereby moved to the second station at which time a holding bar preliminary closes the bag . thence , gates close and gather the neck of the bag and a metal clip is advanced by means of a punch in a clip channel defined by the closed gates . the clip is thereby fastened about the neck of the closed plastic bag and the excess tail of the bag is cut by means of a knife . trap doors then release the packaged product onto a conveyor belt , a new bag is positioned on the spaced , guide plates , and the apparatus is ready to recycle .

the present invention comprises novel preparations of polyoxypropylene / polyoxyethylene octablock copolymers which retain the growth - promoting and immunity - enhancing activity of commercially - available preparations , but are free from the undesirable effects which are inherent in the prior art preparations . because the polyoxypropylene / polyoxyethylene copolymers which comprise the present invention have a more homogenous population of molecules with fewer low molecular weight species than prior art preparations , the biological activity of the copolymer is better defined and more predictable . moreover , the polyoxypropylene / polyoxyethylene copolymer of the present invention substantially reduces any risk to human health through the consumption of food animals since the copolymer hereof is not absorbed into the animal &# 39 ; s edible tissue . methods for preparation of the polyoxypropylene / polyoxyethylene copolymer of the present invention are also provided .

a porous membrane assembly includes , in an exemplary embodiment , a porous membrane substrate having hydrophobic properties . the membrane substrate includes a first side , an opposing second side and a plurality of pores extending therethrough . the membrane substrate also includes a discontinuous layer of an oleophobic coating applied to the first side so that the plurality of pores in the first side are substantially free of the oleophobic coating , and a continuous layer of an amine containing hydrophilic polymer coating applied to the second side of the membrane substrate .

an aptamer - based solid - state electrochemical biosensor for label - free detection of salmonella enterica serovars utilizing immobilized aptamers . the device is realized by forming a matrix array of parallel capacitors , thus allowing the realization of low - cost , portable , fully integrated devices . protein - aptamer binding modulates the threshold voltage of a circuit , changing the impedance of the circuit . this circuit is further characterized by an electrode coded with a p - si substrate , enhancing the affinity between the salmonella outer membrane proteins and the aptamer . an aptamer embedded detection plate is configured within a testing lid device that fits a standard , commercially available polymer specimen jar . a sample is mixed with broth for incubation and cultivation of any present salmonella bacteria to obtain acceptable concentration of the pathogen for testing . the information obtained can then be transmitted by wireless network .

a solder structure comprising a radially - curved exterior surface enclosing a predetermined - sized cavity used for flexibly joining together at predetermined conductive contact points two planar elements having dissimilar properties . by assembling the two planar elements in a tiered arrangement , one planar element having an annular conductive pad and the other planar element having either a corresponding annular or circular conductive pad , separated by a spherical solder compound comprised of solder and a fluxing agent , a hollow solder structure can be created during a melting and subsequent cooling of the solder compound . the plasticity / resiliency characteristics of the resulting hollow solder structure absorbs lateral movement of the two planar elements relative to each other without degradation of the solder joint .

a new generation elastomeric biopolymer produced by yeast belonging to the family saccharomycetaceae , and an isolated yeast belonging to the genus williopsis that produces and secretes the biopolymer .

an extruding machine for the extrusion of plastic or other similar materials in variegated forms comprising a series of bar members spaced from one another , wherein said bar members form by their interstitial spaces the extrusion chambers ; said bar members having heating elements integrally disposed therein for the purpose of heating , to an amorphous state , the plastic material placed on and contacting the upper surface of said bars for extrusion into a receptacle beneath the bars .

a geomembrane comprising a unitary structure fabricated by co - extrusion including a center core , a thermoplastic adhesive layer secured on one side of the center core , and a textured layer secured on the opposite side of the center core . the geomembrane is utilized in the manufacture of a liner for earthen constructions by employing the thermoplastic layer of the geomembrane to secure the geomembrane to a geosynthetic clay liner .

controlled release systems release at least one pluribioactive antifungal drug exhibiting at least one additional bioactivity from the group consisting of spermiostatic , antineoplastic , antibacterial , antirestenotic and antiviral activities . the drug release system is designed for use as a spermiostatic contraceptive , intravaginal ringed - mesh which may also exhibit antiviral activity , an in situ - forming implant for treating different forms of cancer and topical film for treating or preventing bacterial and fungal infections .

the side walls adjacent a vertically reciprocable platform are moved towards each other to compress compressible products , such as kitchen paper towels , toliet paper and the like , for introducing them into a plastic bab upon vertical movement of the platform . the side walls are coupled through cam follower rollers to inclined guide tracks on guide track elements , and slidably coupled to move with the platform on a guide rod . the angle of inclination of the guide tracks is adjustable , as well as the separation of the guide tracks from each other , so that the degree of compression , as well as the size of the compressed package , can be readily controlled .

a reusable apparatus for disposal of animal feces . the apparatus comprises a collapsible and reusable cardboard container , a supply of disposable sealable plastic bags which can fit as a liner within the cardboard container , and a small disposable scoop or paddle associated with each plastic bag .

polymeric nanofibers have been developed which are useful in a variety of medical and other applications , such as filtration devices , medical prostheses , scaffolds for tissue engineering , wound dressings , controlled drug delivery systems , cosmetic skin masks , and protective clothing . these can be formed of any of a variety of different polymers , both non - biodegradable or biodegradable , and derived from synthetic or natural sources . the present invention discloses 1 ) the composition of fibrous articles and 2 ) methods for using these articles in medical applications . the biodegradable fibrous articles , which are preferably formed by electrospinning polymer solution of biodegradable fiberizable material with or in conjunction with medicinal agents and bioactive materials , comprise a composite of nanofibers with actives . nanofibrous articles having specific medical uses include controlled drug delivery devices , glaucoma implants , tissue engineering , wound dressings , reinforcement grafts , corneal shields , and orbital blowout or sinus reconstructive materials . the methods include controlled drug delivery of a medicinal agent and providing treatment for inflammation , infection , trauma , glaucoma , and degenerative diseases . the drug delivery compositions and methods of this invention are directed towards improving the delivery of drugs to a target area of the body . these drug delivery compositions are nanofiber webs , mats , or whiskers which incorporate an active ingredient for delivery into a bodily fluid . the active ingredient is delivered in a controlled manner by placing the nanofiber web into the bodily fluid which allows the drug embedded in the nanofiber to be released in a controlled and longer lasting manner .

an implant such as a stent is coated with a biodegradable or non - biodegradable polymer having therein an antiproliferative / immunosuppressive agent and a compound which reduces the rate of metabolism of the antiproliferative / immunosuppressive agent thereby inhibiting restenosis .

an apparatus for calibrating hollow chamber sheet extruded lines out of thermoplastic resin includes a vacuum housing and a planar intake area at a first end of the vacuum housing . the planar intake area is configured to receive the extruded line . support rollers within the vacuum housing are configured to support the extruded line . the extruded line exits the vacuum housing through a planar outlet area located at a second end of the vacuum housing opposite the first end .

a reusable sponge or foam made of a polymer such as polyurethane is prepared containing a plurality of different enzymes or a cross - linked complex of the plurality of enzymes for detoxification of a diverse array of hazardous chemicals such as organophosphorus and / or organosulfur compounds . the plurality of enzymes include enzymes selected from acetylcholinesterase , butyrylcholinesterase , triesterase , pseudocholinesterase , choline oxidase , peroxidase , organophosphate hydrolase , phosphotriesterase , paraoxonase and laccase . a preferred mixture of enzymes contains organophosphate hydrolase and acetylcholinesterase or butyrylcholinesterase . the sponge or foam may additionally contain carbon , an enzyme reactivation compound and / or an indicator for measuring capacity for detoxification . the indicator can be fluorescent , chemiluminescent or visible chromogen or an electrode , and be encapsulated in a liposome or crushable packet . the sponge or foam may be color - coded to indicate specific chemical detoxified , or to indicate enzymatic concentration , activity and / or remaining shelf - life . a kit is formed containing the sponge or foam and the compound for enzyme reactivation .

a degradable polyester stent is disclosed , which includes a polyester composite , wherein the polyester composite is produced from a biodegradable polyester and a metal - based material . a method of preparing the degradable polyester stent is also disclosed . the method can improve the mechanical properties of the biodegradable copolymer stent and can achieve the radiopacity of the main body and the overall of the stent .

in one aspect , the invention is directed to a biocidal composition , comprising a mixture of a substantially oxidation - resistant thermoplastic polymer having a melting point of about 60 ° c . to about 100 ° c . ; and a composition for releasing chlorine dioxide gas upon exposure to moisture . in another aspect , the invention provides a polymeric matrix comprising the biocidal composition and having a moisture vapor transmission capability of about 100 to about 1000 grams per 24 hours per square meter per mil of thickness . the invention further provides a manufactured article comprising the biocidal composition , for example manufactured by extrusion , injection molding or blow molding .

the present invention relates to a surgical fastener or device formed in the shape of an arrow comprising a shaft with a proximal portion having protrusions and a blunt end and a distal portion having protrusions and a pointed end , the protrusions of the proximal and distal portions configured to lock the implant in a position inside a soft and / or tough tissue according to the use of the implant . the implant may be manufactured of a polymer or a polymeric compound which is substantially absorbable in tissue conditions and contains oriented reinforcing structure or the like of a polymer or polymeric compound or ceramic bioglass compound . the surgical implant of the invention is particularly but not solely intended to be used in repair surgery of traumas of soft and / or tough tissues containing fibrous structures , such as knee meniscal tissues .

disclosed herein is a method of separating carbon dioxide from a gas mixture using a biopolymer , including : introducing hemocyte or extrapallial fluid , extracted from shells , into a reactor filled with 1 l of a solution containing a calcium source , and then dissolving the hemocyte or extrapallial fluid in the solution to form a mixed solution ; and mixing carbon dioxide or a gas mixture containing carbon dioxide into the mixed solution to separate carbon dioxide from the gas mixture .

the present disclosure relates to a multi - chamber bioreactor , preferably in a polymeric material with a 3d structure , adapted for cell - mono and co - culture , with at least two entries and outputs of culture medium adaptable to be used as a static culture system and to incorporate a dynamic platform creating a bioreactor . the disclosure also relates to a technique based on a bioreactor device that allows the creation of two or more different tissues integrated with the natural phenotype , using an integrated and continuous 3d support structure .

there is disclosed herein an improved method and apparatus for plastic sealing / bonding in which a wire element is positioned between two interfacing pieces to be sealed / bonded together , wherein one or both of said pieces are wholly plastic or contain a plastic component . with the wire sandwiched and retained between the interfacing surfaces , a voltage is applied to the wire for a predetermined time to cause the wire to heat sufficiently to melt both interfacing surfaces and effect a fusion and formation of a bond .

a novel polymer coated magnet wire that includes an insulating polymeric coating on only one facet thereof . such a magnet wire can be conventionally wound using current transformer manufacturing processes but can be produced at significantly lower cost due to the almost 75 % reduction in the volume of insulating polymeric material applied to the magnet wire core as compared to similar prior art such products . the method provides for the application of the insulating polymeric coating to only a single minor axis facet of the magnet wire core through the use of custom dies and a modified manufacturing process .

the invention provides urethane polymers bonded to therapeutically active compounds , such as antibiotics . the invention also features methods of applying therapeutically active compounds to polyurethane polymers using textile dyeing . these polymers may be used in a variety of clinical applications .

an integrally formed single piece light strip having no internal voids , comprising first and second bus elements spaced apart from one another by a predetermined distance for operative connection to a power source . a substrate strip includes a top surface and a bottom surface having a printed circuit thereon . at least one light emitting diode , including electrical contact prongs , is provided , with the led being mounted on the top surface of the substrate strip , and with the electrical contact prongs contacting the printed circuit on the bottom surface of the substrate strip . the printed circuit is in electrical contact with the bus elements to conduct electricity thereon . an extruded plastic material completely encapsulates the first and second bus elements , with the substrate strip and the led to thereby provide a protective barrier and thereby make the light strip impervious to moisture . alternatively , an integrally formed light strip is provided that includes a plastic material extruded over first and second bus elements , a substrate strip including a printed circuit and at least one led mounted thereon to completely encapsulate the components to provide a light strip protective barrier , with the extruded plastic material being extruded to form a bottom surface defining a channel therein for facilitating connection of the strip with other like strips through a channel engaging electrical connector .

fiber - reinforced composites prepared from a depolymerizable and repolymerizable polymer have the processing advantages of a thermoset without being brittle . impregnation of polymer into the fiber bundle can be achieved with ease , while still producing a composite with excellent physical properties and high damage tolerance .

a novel connection for a thermoplastic neck to a stub neck portion of a container , comprising a curl on the stub neck portion and a complimentary groove on the neck which cooperate to permit a portion of the neck below the curl to expand when a plug of the closure cap , which is threaded onto the neck , is inserted into the neck . the neck and neck portion have interlocking projections to prevent the neck from turning and the neck and cap having a novel thread arrangement which insures that the plug will properly enter into the neck and provide a good seal which could be frustrated if the neck was permitted to turn .

a dispenser for powdered , granular , pellet , briquette or tablet - like material is provided . the dispenser includes a dispenser head through which the material dissolved in water can be dispensed . a spray device is provided at the head to spray water onto the material provided in the dispenser head . a suspension device is provided to suspend a bag containing the material above the dispenser head . the bag in its suspended orientation has a fastener along the bottom end which closes the bottom end of the bag . the fastener is not , however , releasable until after the bag is mounted in the dispenser . then the fastener is releasable to allow the contents thereof to fall by gravity onto the dispenser head . the dispenser provides a system , which normally avoids contact of the toxic contents of the bag with the user . at the same time , the only waste is in the form of a bag which may be made of recyclable plastic , hence minimizing waste associated with the system .

the present invention relates to a multi - layered composite bag used to store bulk type products such as pet food , seeds , fertilizer , cereals , grains , charcoal , sand , gravel , and other bulk products , including without limitation bulk products intended for human and non - human consumption , and provides a more efficient manufacturing process than using a paper / plastic structure . the present invention provides a bag comprising a middle layer of woven mesh tubing to which an outer layer of solid plastic film is adhered using polypropylene or other polylaminates .

simple and economical embodiments of a drip - stop resistance assembly for caulking guns incorporating a resistance clip , or alternatively , an elastic grommet or constricted spring . the drip - stop assembly may be used with various manually - operated caulking guns including those with metal enclosures and single piece molded plastic open frames , and with various types of plunger shafts including those with a circular or hexagonal cross - section , or ratchet teeth . the drip - stop assembly includes a resistance clip formed of resilient steel wire or the like , and bent or cast in the form of an annular yoke for encircling the plunger shaft and providing frictional resistance against sliding . the resistance clip may be inserted onto the plunger shaft at various positions along the shaft . a back - plate formed by a conventional washer , or angle - bracket is inserted on the plunger shaft and is spaced from the resistance clip for allowing the latter to frictionally slide a short distance . an elastic grommet and constricted spring are also shown as substitutes for the resistance clip . all of the illustrated drip - stop assemblies provide an initial momentary release feature to terminate the bead of caulk upon initial release of the trigger , reduce blow - back , and prevent inadvertent retraction of the plunger shaft . the assemblies are all simple and inexpensive to manufacture , yet highly effective . its simplicity allows them to be manufactured oem or retrofit for minimal additional cost .

an apparatus and system for producing a gel for the treatment of petroleum wells are disclosed herein . the apparatus comprises : a mixing fluid stream , the mixing fluid stream comprising : a mixing fluid inlet for accepting a mixing fluid ; a first pump ; a dry polymer inlet for accepting a dry polymer ; a hydraulic mixer configured and adapted to mix the dry polymer with the mixing fluid to produce a concentrated gel ; a dilution fluid stream for diluting the concentrated gel to produce a diluted gel , the dilution fluid stream comprising : a dilution fluid inlet for accepting a dilution fluid ; a second pump ; and an outlet coupled to the mixing fluid stream .

the invention relates to a method for making a connecting rod made of a composite material and including a yoke for receiving a mechanical axis , said yoke including two parallel arms perpendicular to the mechanical axis , wherein the method comprises the steps of : making a mandrel defining a single piece sufficiently rigid for receiving fiber layers ; applying onto said mandrel base fiber layers and additional layers interleaved between the base layers at the yoke in order to form an additional thickness thereon ; inserting lugs extending through the intermediate layers and the base layers ; injecting resin into the base layers and the intermediate layers and polymerizing said resin .

this invention provides biodegradable tampon applicators adapted for disposal in water - base toilet systems . this invention also provides plasticized starch compositions for use in fabrication of tampon applicators and methods for fabrication thereof .

an image transfer article can include an image - imparting member and a removable substrate disposed adjacent to the image - imparting member . the image - imparting member can have a softening point temperature less than about 220 ° c . the image - imparting member can include at least one surface configured to receive and carry indicia to be transferred and at least one portion comprising a pigment providing an opaque background for received indicia . in some examples , the image - imparting member can comprise a first polymer including the indicia and at least a second polymer including the pigment . in some examples , the image - imparting member can comprise a polymer including the indicia and the pigment . the indicia and the opaque background can be arranged to concurrently transfer to a woven - or fabric - based article or paper in contact with the image - imparting member , upon application of iron pressing temperatures .

a compatibilized polymer alloy has been developed which has excellent processability under thermaforming conditions and the molded articles produced from the alloy exhibit superior gloss , shrinkage , surface hardness , polarity , strength and high heat distortion . the alloy is , in general , comprised of a polyolefin composition , a polystyrene copolymer , or polymer blend , and a compatibilizing agent . this polymer composition or alloy is particularly useful in producing packaging materials and food containers .

dendritic amphiphilic polymers are contemplated . most preferably , such polymers will be fabricated in a single step to the final product that may further be derivatized with , among others , biological relevant molecules . in alternative aspects , precursors of such molecules are prepared in a single step , and the precursors are then reacted to the dendritic amphiphilic polymers .

an asymmetric membrane comprising a tubular polymer film in combination with a tubular braid on which the film is supported , requires the braid be macroporous and flexible , yet sufficiently strong to withstand continuous flexing , stretching and abrasion during use for microfiltration or ultrafiltration . the specifications for a braid of a long - lived membrane are provided . a membrane is formed by supporting a polymer film in which particles of calcined α - alumina are dispersed , on the defined tubular braid .

disclosed are a device and method for the simultaneous fusion of multiple plastic pipe sections . a plurality of pipe sections may be rigidly held , faced off , heated , and joined at the same time using a single piece of equipment . the inventive process allows increased throughput of the fusion process without significant additional costs .

the present invention provides a capture member for directly capturing ink droplets ejected to an area other then a recording medium , among ink droplets ejected from a printer head for ink jet recording , wherein said member comprises a porous plastic produced by sinter molding of plastic particles , and contains an impregnating agent impregnated therein .

a grounding clip is a shelf - grounding device includes a resilient conductive clip that installs onto a fully assembled shelving unit , providing a plurality of electrical connections between the shelf and post to reduce the risks from electrostatic discharge , or esd . the clip can be installed and removed without the use of tools and is held securely in place when attached . since the clip is attached after the shelving unit is assembled , less skill is required by the installer during the installation or reconfiguration process . the clip is reusable and provides electrical connectivity between the shelf and post regardless of whether the shelving unit was assembled with conductive or plastic split sleeves .

a flat , flexible , sterilizable container for a liquid to be maintained and extracted under sterile conditions , said container comprising : a body having walls formed by a three - layer laminate including an outermost layer of a propylene polymer , an innermost layer of a copolymer of ethylene with a small amount of butylene , and an intermediate layer of an amide polymer ; and a valve carried by said body comprising an elastomeric core whose spaced major faces are covered , one , by a three - layer laminate similar to said body wall forming laminate and , the other , by a two - layer laminate including a first layer of a copolymer of ethylene with little butylene and a second layer of an amide polymer .

disclosed is a porous filter support plate of the kind used in traveling bridge filters for the support of granular filter media used in the filtration of waste water , industrial liquors or baths , or for filtration of potable water in a water purification system . the support plates are formed of porous , heat - fusible materials , for example , a thermoplastic organic material , joined together by heat - fused butt joints and / or reinforced by vertical zones which extend vertically through the plates in which the material has been brought to a molten state and is pressed together to form a dense , solid , non - porous mass .

the present invention relates to fire resistant sustainable sandwich panels comprising a thermoplastic foam core in between outer skins made of natural fibres set within a natural thermoset biopolymer . the sandwich panels are provided with a fire resistant protective coating on an outer surface . this surface may be the surface facing the cabin when installed in an aircraft interior . such fire resistant sustainable panels provide the required flame and heat resistance , have a high strength - to - weight ratio , low maintenance costs and are generally easily installed . furthermore , the fire resistant sustainable sandwich panels allow easy recycling and are cheaper than conventional sandwich panels .

biodegradable polymeric compositions that are liquids or pastes at temperatures below 37 ° c . are described . immersion of the compositions in aqueous medium , such as body fluids , increases the viscosity of the composition resulting in the formation of a semisolid material . the polymeric material is a hydroxyalkanoic acid polyester derived from the copolymerization of at least one unsaturated hydroxy fatty acid copolymerized with hydroxyalkanoic acids of 2 - 6 carbons .

a plasma spray method capable of directing plasticized powders against a substrate for deposition of a protective coating thereon is disclosed . various structural details of the apparatus described enable the attainment of high particle velocities without melting the particles . the technical concepts employed are directed to normalizing the temperature of the plasma stream at a reduced value prior to the injection of coating particles . a general reduction in temperature and substantial elimination of a thermal spike at the core of the stream are achieved . coating particles are injected into the plasma stream only after the plasma is first cooled and then preferably accelerated . in detailed embodiments , a nozzle extension assembly having a plasma cooling zone , a plasma acceleration zone , a powder injection zone and a plasma / powder discharge zone is affixed to the downstream end of a conventional plasma generator .

a process for recycling a polymer blend necessarily containing pla , comprising grinding , compacting , dissolving in a solvent of pla , removing the undissolved contaminating polymers , hydroloysis depolymerization reaction and purification steps .

the present invention is a method for treating a subterranean wellbore . more specifically , the invention is a method for removing wellbore solids . a first , polymer containing fluid is placed in the solids bed . a second , viscosifying fluid is then placed into the solids bed thereby agitating the solids in the bed and causing the formation of a gel capsules when mixed with the biopolymer fluid . these gel capsules are capable of trapping or entraining the agitated solids . the gel capsules typically have a relatively high volume and a relatively low density , thereby making their removal from the wellbore easier .

the invention relates to a process for the preparation of a bioabsorbable polyester comprising reacting said polyester under reduced pressure in the reaction system while maintaining said polyester in the molten state during the second half of the polymerization reaction or after completion of the reaction and obtaining said polyester which contain almost no residue of unreacted monomers and volatile ingredients of low molecular weight .

an inkjet printer printhead utilizes a substrate , an orifice layer , and a directionally biased electrostrictive polymer ink actuator disposed between the orifice layer and the substrate to eject ink from the printhead . the electrostrictive polymer ink actuator has a passivation layer disposed on the substrate , a first compliant electrode disposed at least on a first portion of the passivation layer , an electrostrictive polymer membrane disposed on a first area of the first compliant electrode , a passivation constraint disposed on a second portion of the passivation layer and a second area of the first compliant electrode effectively surrounding , in contact with , but not covering the electrostrictive polymer membrane in the first area of the first compliant electrode , and a second compliant electrode disposed on the passivation constraint which is disposed on the second portion of the passivation layer and the electrostrictive polymer membrane which is disposed on the first area of the first compliant electrode .