Manufacture of flame retardant foaming board from waste papers reinforced with phenol-formaldehyde resin.
A new flame retardant and waterproof porous fiberboard was manufactured from waste newspapers by using a foaming agent and a reinforcing phenol-formaldehyde resin. To find the optimum conditions for forming fiberboard with high mechanical properties as well as flame retardant and waterproof characteristics, a series of experiments were performed with varying weight percentages of resin (w). The results indicate that the best quality of the fiberboard was obtained for w approximately 11%.
Improvement of the flame retardancy of paper-sludge/polypropylene composite
Abstract Paper-sludge/polypropylene composites which have many merits such as low cost, disposal of industrial waste and good mechanical properties, were manufactured. For the purpose of improving flame retardancy of the composites, various kinds and contents of flame retardants like Saytex8010, TPP, Mg(OH) 2 and antimony trioxide were introduced into the composites. The flame retardancy of the composites was measured with the UL94 test. Thermogravimetric analysis(TGA) of composites was performed to investigate the flame retardant mechanism. It could be believed that this composite system is mainly dominated by gas phase mechanism. Tests in flexure were used to investigate mechanical properties. The composite with Saytex8010 25 phr and antimony trioxide 15 phr showed the highest flexural strength. The flexural strength in the hybrid flame retardants system increased as the proportion of antimony trioxide increased.
Handbook of Concrete Engineering
Handbook of concrete engineering , Handbook of concrete engineering , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی