Pioneer Electronic Corporation

Kazuyoshi Kobayashi

Tsunehiro Tsukagoshi

Toshikazu Yoshino

Yasuyuki Arai

Sumio Hagiwara

Shinichi Yokozseki

Etsuro Nemoto

A molding composition is obtained by blending flaky graphite with a resin component comprising a mixture of a thermoplastic resin having a glass transition temperature higher than room temperature and another thermoplastic resin having a glass transition temperature lower than room temperature. The composition is kneaded and rolled into a sheet to orient the graphite flakes parallel to the surface of the sheet. The rolled sheet is then molded into an article, for example, speaker diaphragm, arm pipe and head shell, which may be optionally be carbonized or graphitized. The resulting article exhibits improved physical properties, especially high specific modulus of elasticity comparable to aluminum and beryllium as well as good internal loss comparable to paper.

Growing community of inventors

Tokorozawa, Japan

Kazuyoshi Kobayashi