PRODUCTION OF PREPREG SHEET AND APPARATUS THEREFOR

• Main Authors: NAKAHARA SADAHITO, TAKIGAWA TAKASHI
• Format: Patent
• Language: English
• Published: 11.07.1995
• Edition: 6
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE:To obtain a prepreg having excellent strength and thermal conductivity by passing a laminated sheet obtained by placing reinforcing fibers arrange in a sheet shape on the side coated with a thermoset resin of e.g. a film, between a pair of running belts to make the thermoset resin impregnate. CONSTITUTION:A thermoset resin (preferably, an epoxy resin) is coated on a film supported by a releasing sheet. A laminated sheet obtained by placing reinforcing fibers arranged in a sheet shape on the side coated with the thermoset resin is passed between a pair of running belts (preferably, mesh-type belts) which contact with each other or are arranged with a specified space, to impregnate the thermoset resin into the reinforcing fibers or between them to obtain the objective prepreg. Preferably, the surface of the prepreg sheet is smoothed by a pair of heating rolls having smooth surfaces optionally followed by cooling.