Method of producing fiber-reinforced thermoplastic resin molding material

• Main Authors: UCHINO, HIROYUKI, KIMURA, TAKAO, MATOBA, TETSU, NOZAWA, TADAMICHI, OHNO, KENYU
• Format: Patent
• Language: English; French; German
• Published: 06.05.1992
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; IMPREGNATING OR COATING OF PAPER; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MAKING GRANULES OR PREFORMS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TEXTILES; TRANSPORTING; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Disclosed is a method of producing a fiber-reinforced thermoplastic resin molding material by heating and pressing a nonwoven material mainly composed of reinforcing fibers such as glass fibers, carbon fibers or the like and a thermoplastic resin such as polyethylene, polyvinyl chloride or the like and made by a paper making method and then cooling the nonwoven material wherein the reinforcing fibers in the nonwoven material comprise reinforcing fiber bundles each of which comprises a plurality of single fibers bundled with a binder or a mixture of single fibers and said reinforcing fiber bundles.