Toray Industries, Inc.

Hiroaki Matsutani

Nobuyuki Arai

Ichiro Taketa

Narumichi Sato

Kentaro Adachi

Yuta Naito

An object is to provide an incised prepreg having desired formability stably, wherein the incised prepreg contains unidirectionally oriented reinforcing fibers and matrix resin and has an incised region containing a plurality of incisions made to divide reinforcing fibers, wherein the incised region includes a plurality of incision rows, each containing a plurality of incisions having nearly equal fiber-directionally projected lengths and aligned at substantially constant intervals in the fiber direction and wherein the distance L, measured at right angles to the fiber direction, between two incision rows located on either side of an arbitrarily selected incision row and the fiber-directionally projected length Lof the latter incision row satisfy the following relation: −1.0<L/L<0.5.

Incised prepreg and fiber-reinforced plastic

A process is capable of producing a high-quality fiber-reinforced plastic with good yield in a short molding cycle time despite being atmospheric pressure molding. The process characterized uses local contact heating to give different temperature conditions to produce a fiber-reinforced plastic by atmospheric pressure molding from a fiber-reinforced material which contains a reinforcing fiber impregnated with a thermosetting resin composition.

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Masaki, Japan

Hiroaki Matsutani