PREPREG AND METHOD FOR PRODUCING SAME

• Main Authors: TERANISHI TAKUYA, NUMATA KIHARU, ICHINO MASAHIRO, KUSUMI MASAKI, MIYAUCHI AKIRA, SAMEJIMA TADAO, MORI SHOUHEI, KANEKO MANABU, MIURA TEPPEI
• Format: Patent
• Language: English; French; German
• Published: 16.03.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The present application discloses a prepreg roll comprising a continuous prepreg that is wound plural turns into a roll shape to form a multilayer roll, wherein the prepegs that constitute adjacent layers in the prepeg roll are in contact with each other, wherein the prepreg comprises reinforcing fibers and a matrix resin composition, wherein the matrix resin composition comprises: an epoxy resin, a radical polymerizable unsaturated compound, an epoxy resin curing agent, a polymerization initiator that generates a radical, and a polymer formed by radical polymerization of the radical polymerizable unsaturated compound. The prepreg is in a sheet form or a tape form, and in at least one surface of the prepreg, the tack value measured at a pressing pressure of 40 kPa is 70 kPa or less, while the tack value measured at a pressing pressure of 80 kPa is 150 kPa or more.