Sumitomo Chemical Company, Limited

Teijin Fibers Limited

Kenji Watanabe

Kenji Atarashi

Katsuhisa Kitano

Shinichi Takahashi

Motoomi Arakawa

Kumiko Chatani

A resin composition includes a fiber and a polyolefin resin and can provide a molded article having excellent mechanical strength such as flexural strength and impact resistance. The resin composition includes (i) a surface-treated fiber (A) which comprises 100 parts by weight of a fiber (A-I) comprising a polyalkylene terephthalate and/or a polyalkylene naphthalene dicarboxylate and 0.1 to 10 parts by weight of a sizing agent (A-II) adhered to the surface of the fiber (A-I), and (ii) a polyolefin resin modified with an unsaturated carboxylic acid and/or an unsaturated carboxylic acid derivative (a modified polyolefin resin (B)) as a resin component.

Surface-treated fiber, resin composition, and molded article of the composition

A resin composition comprising a fiber component and a resin component, wherein the fiber component is (A) a surface-treated fiber (component A) which comprises 100 parts by weight of a fiber comprising a polyalkylene terephthalate and/or a polyalkylene naphthalene dicarboxylate (component Af) and 0.1 to 10 parts by weight of a sizing agent having a glass transition point of &#x2212;80&#xb0; C. or higher and lower than 70&#xb0; C. and adhered to the surface of the fiber (component Ac); and the resin component comprises (B) an ethylene-based copolymer containing a glycidyl group (component B), (C) a modified polyolefin resin modified with an unsaturated carboxylic acid and/or an unsaturated carboxylic acid derivative (component C), and (D) a polyolefin resin having a melt flow rate of 40 to 200 g/10 min (component D), except for the components C and D, the content of the component D being 30 to 850 parts by weight based on 100 parts by weight of the component A, and the total content of the components B and C being 5 to 630 parts by weight based on 100 parts by weight of the component A, and a molded article thereof.

Resin composition

A production process of a resin composition containing 100 parts by weight of a polyester fiber, 1 to 600 parts by weight of a copolymer of ethylene with a glycidyl group-carrying monomer, and 0.3 to 500 parts by weight of an unsaturated carboxylic acid-modified polyolefin resin, the process comprising steps of (1) melt-kneading the copolymer with the modified polyolefin resin, and (2) kneading the resultant melted resin with the polyester fiber at a temperature lower than a melting point of the polyester fiber.

Growing community of inventors

Ichihara, Japan

Kenji Watanabe