Reprocessing unsatd. polyester resin-coated felt and jute prods. - by crushing, mixing with unsatd. polyester resin and opt. sytrene] pelletising and hot press-moulding

摘要

The process involves crushing the waste and scrap material (I), together with any stripped metal, to give material (A) with particle size 60-700 microns, mixing with unsatd. polyester resin (B) or a mixt. (C) of resin (B) and styrene, pelletising the mixt. and moulding in a hydraulic press at elevated temp. and pressure. Also claimed is a mixt. of 10-70% (A) and 90-30% resin (B) (with polymerisation hardeners, accelerators, retarders etc.), or of 10-70% (A), 10-30% styrene and 60-20% resin (B). USE/ADVANTAGE - The process enables complete recycling of the above waste prods. (I) (instead of disposal by burning), to give new prods. contg. less styrene than the original prods., using smaller amts. of hardeners etc. as above. The new prods. are useful in the motor industry (roof lining, sound insulation etc.) and in the timber prods. and furniture industries etc.