Toray Industries, Inc.

Keisuke Inose

Kentaro Sano

Naokichi Imai

Atsuki Tsuchiya

A molded article includes 10 to 40% by mass of reinforcing fibers (A); and 60 to 90% by mass of a matrix resin (B) mainly including a polyarylene sulfide, the molded article satisfying conditions (I) to (IV) and having a tensile strength of 240 MPa or more in a main orientation direction of the reinforcing fibers (A) in the molded article:

Molded article and molding material

A fiber-reinforced resin composition includes a polyarylene sulfide (A), a carbodiimide compound (B) and carbon fibers (C) in specific blending amounts and in which the carbon fibers (C) are surface-treated with a sizing agent (D), the carbodiimide compound (B) is an aliphatic carbodiimide compound, and the sizing agent (D) is a compound having three or more specific functional groups in one molecule; and a fiber-reinforced composite material includes a thermoplastic resin (A'), an adhesive compound (B&#x2032;) and reinforcing fibers (C&#x2032;) and in which the adhesive compound (B&#x2032;) is a compound having two or more specific structures in one molecule, the thermoplastic resin (A&#x2032;) is a thermoplastic resin containing an element other than carbon in a repeating unit structure of a main chain, and an abundance ratio Rb of the adhesive compound (B&#x2032;) is 1.2 or more.

Fiber-reinforced resin composition, and fiber-reinforced composite material

A molding material includes 5 to 50 parts by mass of reinforcing fibers (A) with a sizing agent (s) deposited thereon, 1 to 20 parts by mass of a component (B) containing a polycarbodiimide compound (B-1) that is liquid at 50&#xb0; C., and 30 to 94 parts by mass of a thermoplastic resin (C) containing an element other than carbon in the repeating unit structure of the main chain, based on 100 parts by mass of the total of the components (A) to (C), wherein the molding material is a composite in which a composite fiber bundle (D) with the component (A) impregnated with the component (B) is covered with the component (C).

Molding material, method of producing same, and master batch used in same

A carbon fiber-reinforced polyarylene sulfide has both dynamic characteristics and molding cycle characteristics and can be produced with high productivity by preparing a polycarbodiimide-modified polyarylene sulfide using a polyarylene sulfide and a polycarbodiimide as raw materials, then melting the resulting polycarbodiimide-modified polyarylene sulfide, and combining the polycarbodiimide-modified polyarylene sulfide with carbon fibers at a specific ratio to produce a composite.

Method of producing carbon fiber-reinforced polyarylene sulfide

A molded article includes 10 to 40% by mass of reinforcing fibers (A); and 60 to 90% by mass of a matrix resin (B) mainly including a polyarylene sulfide, the molded article satisfying conditions (I) to (IV) and having a tensile strength of 240 MPa or more in a main orientation direction of the reinforcing fibers (A) in the molded article, wherein (I) strand tensile strength of the reinforcing fibers (A) is 1.5 to 5.5 GPa, (II) number average fiber length of the reinforcing fibers (A) is 0.4 to 10 mm, (III) tensile elongation of the matrix resin (B) is 1.5 to 10%, and (IV) interfacial shear strength between the reinforcing fibers (A) and the matrix resin (B) is 20 MPa or more.

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Iyo-gun, Japan

Keisuke Inose