a detailed explanation will be given below to the operation of the process with particular reference to soybean , an important source of vegetable protein and with reference to the attached drawing . fig1 is a schematic view of a colloid mill used in the present invention . in the pretreatment , grains of soybean are soaked or boiled in water to adjust the water content . as has been described before , the material travels through the high temperature zone ( at about 100 ° c .) momentarily while being crushed by the frictional movement , where enzymes are deactivated and the soybean odor is removed in this stage . therefore , additional pre - and post - treatments are not required any more . when whole grains of soybean are the starting material , they are adjusted to contain 40 - 55 % of water to obtain the best fibers . the skins are peeled if necessary , but the achieved characteristics are not significantly influenced by peeling . the fibrous products may be further treated to attain different characteristics . for example , fibrous protein obtained can be further heated by steam , or in hot water , or promoted to be denatured in an acid solution , which treatment serves to change the texture . in some cases dyeing is also possible . the operation to make fibers is the most important part of the present invention , of which the principle is entirely different from those of conventional processes of producing fibrous and tissue proteins , as already mentioned . the colloid mill to be used in the manufacturing of this invention , as seen in the attached drawing ( fig1 ), has usually two grinding disks which are made from grindstone , stainless steel material , or artificial grindstone . the two disks ( 1 ), ( 2 ) are placed facing each other , of which the upper one ( 1 ) is fixed and the lower one ( 2 ) rotates at a high speed , or vice versa , or otherwise the two disks rotate in directions opposite to each other . the grinding occurs only in the peripheral parts ( 4 ) of the disks , and the central portions ( 3 ) are concave to form a hollow portion with an approximately trapezoidal cross section . the desirable area of grinding is about 1 cm wide , but this invention is not restricted to the size . the disks are so set that the distance between them could be varied at will . the distance should be decided in the range up to 1 mm depending on the end product , but a distance smaller than 0 . 5 mm is favorable . the speed of rotation also depends on the size of the disks and is best changed continuously . the grinding disks are made ideally from a material resistant to a high pressure and temperature and , at the same time , their surface should be rough enough to prevent raw materials from slipping . the mentioned principle of manufacturing is adopted , though not exactly but approximately , in an attrition mill , disk crusher ( simonds disk crusher ) and hildebrande mill . the appearance of the fibrous soybean produced by the present invention , apart from that of conventional fibrous protein manufactured by use of spinning technique , is not so uniform ; long ones are 100 - 200 mm long and short ones are less than 10 mm , and the thickness of the fibers varies , some are less than 0 . 1 mm thick and some about 0 . 5 mm thick . the non - uniformity of the product fibers gives the touch of natural meat . the texture could be varied in a pre - or post - treatment , as well as giving coloration and odor , at will . the protein product thus fiberized , whose physical properties depend on its water content , is dried if necessary . when the water content of a product is relatively low , the product can be preserved in high quality without further drying . also , the water content can be adjusted during the grinding . this is an additional feature of this invention . the above explanation of the process has been done using whole soybean as an example , but the present invention is not restricted to it . thus , the same effect can be expected if grains of whole soybean are crushed beforehand and ground with a colloid mill . the process also can be applied to degreased soybean , to cereals and beans in general such as wheat , barley , rice , flour , corn , corn gluten meal and wheat gluten . materials to be used are extended to include animals and birds ( meat , bones , skins , blood , eggs , egg shell ), fish and shells ( meat , skins , bones , internal organs , shells and eggs ), insects and their chrysalis , protein of microorganisms , skins of oranges , sea weeds , vegetable foods such as some vegetables , seeds , nuts , and mushrooms , chemical seasonings such as m . s . g ., nacl , etc . the details of application to these materials have been described in the foregoing sections . naurally , these materials can be used either alone or in admixture . in any case it is important in the pre - treatment is to adjust the water content of the material to be fiberized . also the present invention is applicable to chemical seasonings of a low molecular weight such as amino acid , m . s . g ., nacl and others , which are not fiberized alone , but rather , can be fiberized or granularized by combining them with other suitable materials . the raw food materials of both animal and vegetable origin , which are to be processed by the present invention , are first crushed into pieces of a suitable size which are adequate for treatment with a colloid mill . if necessary , these are mixed with other materials , and the water content of the mixture is adjusted to 10 - 65 % by weight , preferably 20 - 65 %, which is then ground in a colloid mill . fibrous or granular raw food materials can be obtained by the above mentioned treatment , and may have a peculiar texture and therefore a wide range of applications as raw food material . in the present invention , the water content should be adjusted immediately before the colloid mill treatment to 10 - 65 % by weight , preferably to 20 - 65 %. this value has been deduced from many experimental runs ( see examples ). of course the best value of the water content depends on the particular material . however , if it is adjusted to below 10 %, the ground matter does not cluster to form fibers . if the content exceeds 65 %, the ground matter will be dispersed in the water , and hardly form fibers . the present process features , as has been described above , the possible use of almost all kinds of food materials , depending on the purpose and need , to prepare many different kinds of fibrous food materials . now the present invention will be explained using particular examples as follows . whole grains of soybean in the amount of 5 kg were soaked in tap water for 3 hours until the water content of the soybean reached 46 % ( by weight ), and then they were peeled . subsequently they were continuously introduced into a colloid mill ( a supermicro refiner mk - z - 10 , manufactured by masuko industry and distributed by sankyo company ), of which the rotation was adjusted to 1 , 500 rpm and the distance between grinding disks to 0 . 06 mm . in about 2 minutes the above soybean was completely processed into fibers . the above fibrous soybean product was heated for 5 minutes by superheated steam , or boiled for 5 - 10 minutes in hot water , or soaked in cold or hot water of approximate ph 4 . 5 for 10 minutes and then dehydrated by centrifugation to obtain the fibrous food material . this food material , even when kept soaked one whole day in water and for an hour in hot water , kept its original form without decay . the food material can be stored in ice - cold or refrigerated condition . otherwise it can be dried in the usual process to make it storable . five kilograms of whole grains of soybean were soaked for two and a half hours in tap water , until the water content reached 39 %. without being peeled , the substance was transferred to a colloid mill ( the distance between two grindstones was adjusted to 0 . 003 mm ), the same one as was used in example 1 . the post - treatment was carried out introducing heat treatment since the pre - treatment contained no heating as it was in example 1 . thus , heating was carried out for 5 minutes with steam , and dehydrated by centrifugation , to obtain a fibrous food material which was almost the same as that in example 1 . five kilograms of whole grains of soybean were soaked in water for 2 hours and then boiled for 3 minutes in sufficient water to achieve a water content of 42 %. the substance was then introduced to a colloid mill as in example 1 , to obtain almost the same fibrous food material as appeared in example 1 . five kilograms of whole grains of soybean were soaked in water for 2 hours and then boiled for 3 minutes in sufficient water to achieve a water content of 50 %. after being peeled , the substance was passed to a colloid mill as in example 1 to obtain almost the same fibrous food material as appeared in example 1 . five kilograms of whole grains of soybean were soaked in tap water for 3 hours and then heated for 40 seconds with pressed steam ( 4 kg / cm 2 ) until the water content reached 42 %. subsequently , the material was introduced to a colloid mill as in example 1 to obtain almost the same fibrous food material as in example 1 . five kilograms of whole grains of soybean were heated with an electronic range in a manner such that burning did not occur and soaked in tap water for 4 hours until the water content reached 38 %. then the substance was introduced to a colloid mill to obtain the same fibrous food material as that appeared in example 1 . to 5 kg of degreased soybean powder , 3 . 5 l of water was added and the mixture was thoroughly kneaded . the water content was adjusted to 47 %, and introduced to a colloid mill as in example 1 . as the post - treatment , heating with steam was carried out for 5 minutes , to obtain a fibrous food material . to 5 kg of degreased soybean powder , 3 . 8 l of water were added , thoroughly kneaded and heated for 3 - 5 minutes in an electronic range , until the water content reached 48 %, and then introduced to a colloid mill , to obtain fibrous food material . in a usual process , 5 l of soybean milk was prepared from 1 kg of whole grains of soybean and curd was produced from it with calcium chloride added . the curd containing 70 % of water amounted to 1 . 3 kg when dehydrated with a centrifuge . the total water content was adjusted to 50 % by simply adding separated protein , followed by the treatment with a colloid mill in the same manner as in example 1 , to obtain fibrous food material . ( otherwise , a drying or dehydration treatment may be applied to the curd in place of adding dried powder for the purpose of adjusting the water content to about 50 %. subsequent treatment should be undergone as in example 1 .) a mixture of 2 kg of wheat gluten with 1 . 5 l of water was thoroughly kneaded to make the water content approximately 48 %. this was treated with a colloid mill as in example 1 , to obtain fibrous food material . a mixture consisting of 2 kg of corn for animal food ( in coarse pieces ) and 1 . 2 kg of water was thoroughly kneaded to adjust the water content to 37 %. this was treated with a colloid mill as in example 1 to prepare a fibrous food material . since corn contains a relatively large amount of starch , the fibers therefrom exhibit localized swelling , such as puffdried cereals . this property is particularly correlated to the water content of the mixture . a mixture of 2 kg of corn gluten with 1 . 5 l of water was thoroughly kneaded to adjust the water content to approximately 48 %. this mixture was then treated with a colloid mill as in example 1 , to obtain fibrous food material . water content of pressed barley for animal food was adjusted to 48 % by adding 1 . 5 l of water to 2 kg of the barley . this was then treated with a colloid mill as in example 1 , to obtain fibrous food material . ( skins of barley are not edible in their original state , while the present invention could convert them into a completely edible state .) a mixture of 1 kg of mutton pieces , 9 kg of whole grains of soybean , and 3 . 8 kg of water was stirred to attain uniform distribution and the water content was made 40 % by weight . then this was continuously introduced to a colloid mill ( a supermicro refiner mk - 2 - 10 , manufactured by masuko industry and distributed by sankyo company ) of which the rotation was adjusted to 1 , 500 rpm and the distance between the grinding surfaces to 60 micron . the whole amount of the mixture was released at a rate so as to discharge from the apparatus in about 3 minutes in the form of fibers . the fibrous mixture was heated for 5 minutes with overheated steam , or boiled for 5 - 10 minutes with water , or soaked for 10 minutes in a buffer solution of approximate ph 4 . 5 or in a solution containing the buffer . then the matter was dehydrated by centrifugation to obtain fibrous food material . the food material thus prepared can keep its original form even on soaking in water for a whole day and in hot water for an hour . on refrigerating , freezing , and drying , the material did not lose its excellent physical properties , and did not possess an unfavorable odor ( of soybean or of mutton ) or taste . one kilogram of thigh mutton was boiled for 3 minutes in sufficient amount of water , dehydrated by centrifuge , and the water content was adjusted to 50 % by weight . on the other hand , 9 kg of whole grains of soybean were baked in an electronic oven to the extent not to cause burning , soaked for 1 . 5 hours in tap water , to make the water content 29 % by weight . to a mixture of the above materials were mixed 200 g of kitchen salt , 225 g of sugar , 1 , 350 g of soybean sauce , smoking liquid , and a little amount of chemical seasoning . the resulting mixture was made homogeneous by kneading with a kneader . with the water content adjusted to 39 % by weight the mixture was frozen and treated with a colloid mill in the same manner as in example 1 . this material was edible when dried , or used as is , as a cooked meat product . a mixture consisting of 7 kg of crushed bones of cocks , pigs , and oxen , 2 kg of wheat , degreased soybean , whole grains of soybean and 1 kg of dried okara ( residue of soybeans from which soluble matter has been extracted ) was stirred to attain uniform distribution and the water content was adjusted to 45 % by weight . the resulting material was treated with a colloid mill as in example 1 . since heating is not contained in the pre - treatment , heating was introduced in the post - treatment as it was in example 1 . thus , heating was conducted for 5 minutes with steam , followed by dehydration by centrifugation , to obtain fibrous food material . skin and internal organs of cocks , and internal organs of pigs and oxen crushed or cut in pieces amounting to 5 kg were mixed with 5 kg of degreased soybean and adequate amount of water . the mixture was heated with an electronic range for 15 minutes to reduce the water content to 50 % by weight . this was treated with a colloid mill to obtain fibrous food material . cod ( sukeso cod in japanese ) including bones and skin as well as meat in gross pieces amounting to 6 kg was mixed homogeneously with 4 kg of degreased soybean , and the total water content was made 55 % by weight . this was treated with a colloid mill as in example 1 . post - treatment heating was carried out as in example 1 , since heating was not effected in the pre - treatment . thus , heating was conducted for 5 minutes with steam . the resulting product was dehydrated by centrifugation to obtain fibrous food material . a single substance or a mixture of them selected from degreased soybean and wheat , amounting to 1 kg , was mixed with 410 g of blood of pigs and oxen . the mixture was stirred to attain uniform distribution . this was heated with an electronic range for 15 minutes to adjust the water content to 35 % by weight and treated with a colloid mill as in example 1 to obtain fibrous food material . the final product was superior to conventional artificial meat in taste , color and smell . scraps of dried skipjack , small boiled and dried sardines , tangles , mushrooms and bones of cocks and animals , alone or in an admixture were treated to adjust the water content to 40 % by weight and treated with a colloid mill as in example 1 to obtain fibrous food material . the product was dried and packaged in a permeable bag , something like a tea - bag , and was especially useful to produce tasteful soap in japanese dishes . the soap thus produced was transparent in contrast to the turbid soaps obtained from commercially available bags . the residue in the bag which remained in its original form could be used as food for fish , dogs and cats . the water content of dried cod and cuttlefish , separately or in admixture , was adjusted to 35 % by weight . the material was applied to a colloid mill as in example 1 , to prepare fibrous food material . the material with a little kitchen salt applied was most suited as relish with sake . chrysalis of silkworm , maggots and earthworms , 7 kg in total , were mixed with 2 kg of wheat , 1 kg of dried unextracted residue of soybeans ( okara in japanese ), rice bran , wheat bran , and less amount of beet . the mixture was stirred to attain uniform distribution of ingredients , adjusted to a water content of 45 % by weight and introduced to a colloid mill , as in example 1 , to obtain fibrous food material . the final product did not decay in water and therefore was suited as food for fish . one kilogram of dried whole hen eggs , or dried egg white was mixed with 290 g of water . the water content was adjusted to 30 % by weight . this material was introduced to a colloid mill as in example 1 , to obtain fibrous food material . shells of eggs , shellfish and lobsters , 3 kg in total were crushed , and to the pieces were added 5 kg of flour and 2 kg of unextracted residue of soybeans ( okara ). the water content of the mixture was adjusted to 25 % by weight , and the mixture was introduced to a colloid mill to obtain fibrous material . the final product was suited as food for cocks . to completely degreased milk powder or completely degreased condensed milk with added sugar , water was added so as to attain a water content of 40 % by weight . this was introduced to a colloid mill as in example 1 to obtain fibrous food material . when the final product was boiled in water , soluble ingredients were dissolved but did not decay since the insoluble components , such as protein , remained unchanged . this product proved most suited as an additive to soap . a mixture consisting of 5 kg of glutinous rice , 5 kg of mashed potato , and 2 . 7 kg of water was treated to adjust the water content to 30 % by weight , and the mixture was introduced to a colloid mill as in example 1 , to obtain fibrous food material . this material , when fried , swelled and is suitable as a nice snack having good appearance and texture . eight kilograms of buckwheat flour , 2 kg of wheat , and 3 kg of water were mixed and the water content was adjusted to 35 % by weight . the mixture was introduced to a colloid mill as in example 1 to obtain a fibrous food material having a tough texture . the final product was suited for use as instant noodles . one kilogram of peels of citron or mandarin orange , 0 . 5 kg of powders of japanese pepper , ginger or horseradish , 1 kg of tangle and 7 . 5 kg of flour was treated to adjust the water content to 35 % by weight , and introduced to a colloid mill as in example 1 to obtain a fibrous food material . the final material was very fragrant and was best suited as an additive to tea - soaked rice . to vegetable products , such as dried gourd shavings and chinese bamboo sprouts , water was added to give a water content of 40 % by weight . this was introduced to a colloid mill as in example 1 to obtain fibrous food material . the final product was suited as additives for chinese style noodles . water was added to beans , such as red beans and peas , to attain a water content of 33 % by weight . this was treated with a colloid mill as in example 1 to obtain fibrous food material . water was added to nuts , such as peanuts and chestnuts to attain a water content of 55 % by weight . the mixture was treated with a colloid mill as in example 1 to obtain fibrous food material . protein of microorganisms , such as yeast powder was mixed with water so as to attain a water content of 45 % by weight . the mixture was treated with a colloid mill as in example 1 to obtain fibrous food material . water was added to scraps of tea leaves to attain a water content of 40 % by weight . the mixture was treated with a colloid mill as in example 1 to obtain fibrous food material . this process was useful in reducing the time for tea - processing . to 1 kg of separated protein from soybean was added 44 g of water , and the water content was adjusted to 10 % by weight . this mixture was treated with a colloid mill as in example 1 , of which the speed of rotation was controlled so that the peripheral speed of the rotating disk was 2 m / min . and the distance between the two disks was 1 mm . since the pre - treatment did not contain heating as in example 1 , a heating process was added to the post - treatment . thus , heating was carried out for 5 minutes by steam . the product was dehydrated by centrifugation to obtain granular food material . to 1 kg of potato starch was added 250 g of water and mixed to produce a water content of 20 % by weight . the mixture was introduced , as in example 1 , to a colloid mill of which the rotation was controlled so that the peripheral speed of the rotating disk was 80 m / min . and the distance between the two disks was 0 . 5 mm . fibrous food material was produced by this process . three - hundred grams of kitchen salt was uniformly distributed in 700 g of potato starch , to which 333 g of water added , and the water content of the whole mixture was controlled to be 25 % by weight . this was introduced , as in example 1 , to a colloid mill of which the speed of rotation was controlled so that the peripheral speed of the rotating disk was 1 , 600 m / min . and the distance between the two disks was 0 . 3 mm . granular food material was produced by this process . to 1 kg of separated protein from soybean was added 1 , 700 g of water . the whole mixture was thoroughly mixed and the water content was adjusted to 65 % by weight . this was then introduced , as in example 1 , to a colloid mill of which the speed of rotation was controlled so that the peripheral speed of the rotating disk was 8 , 000 m / min . and the distance between the two disks was 0 . 005 mm . fibrous food material could be obtained by this process . the above examples illustrate the most preferred embodiments of the present invention , and the present invention should not be limited thereto . particularly those materials which could hardly be used as food by themselves can be converted into fibrous or granular forms by the present invention . these materials not only make the processing and cooking that follows easier , but also provide new foods that have different texture , taste , and appearance from those of previous foods by selecting the ingredient materials , as has been described in detail . another advantage of this invention is that the cost for production could be reduced to a large extent since it involves very simple operations . further , the principle of this invention is not restricted to foods , but can be extended for use as medicines , fertilizers and other industrial materials .
raw food materials , having a 10 - 65 % water content , are ground between two opposing disc grinding members . the opposing discs are concave to form a central hollow portion therebetween having a nearly trapezoidal cross section .