Sumitomo Electric Industries, Limited

Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Ftex, Incorporated

Hiroshi Shibano

Takashi Saito

Ryosuke Kamei

Akira Nakamura

Takashi Fujimaki

Takashi Tanaka

Katsumasa Hoshi

Yoshitomo Urata

Terumitu Kotani

Takeshi Banba

Kunihiro Sasai

Yukihiro Nomura

Hiroshi Satani

The present invention provides a method of producing a polyethylene terephthalate graft copolymerized resin, comprising subjecting the following mixture to a homogeneous reaction at a temperature of 250&#xb0; C. or higher to impart a high melt viscosity to the mixture, the mixture containing (A) 100 parts by weight of a polyethylene terephthalate polyester as a main material, (B) 0.01 to 2 parts by weight of a polymeric polyfunctional epoxy compound containing 7 to 100 epoxy groups in a molecule and having a molecular weight of 1,000 to 300,000 as a coupling agent, (C) 0.01 to 1 part by weight of a metal salt of an organic acid as a coupling reaction catalyst, and (D) 0 to 100 parts by weight of an aromatic alicyclic polyester and/or an aromatic aliphatic polyester each having a carboxyl group in an aromatic nucleus as an auxiliary material.

Production method of polyethylene terephthalate graft copolymerized resin and molded product thereof

A polyethylene resin composition for spacer for optical fiber cable provided with a plurality of channels spirally formed on the periphery surface thereof for receiving the optical fiber comprising polyethylene resin having a melt index of more than or equal to 0.01 g/10 min to less than 0.30 g/10 min, a density of 0.941 to 0.955 g/cm.sup.3 and a flow ratio (HLMI/MLMI) in accordance with JIS K7210 of 20 to 55, and optionally fluorine elastomer.

Spacer for optical fiber cable and polyethylene resin composition

Telescopic drinking straw

Growing community of inventors

Yokohama, Japan

Hiroshi Shibano