Piolax, Inc.

Toto Ltd.

Tetsuo Masatake

Naoki Yoshida

Tsutomu Kato

Hideyuki Matsui

Masatoshi Enoki

Hirozou Uejou

Toshiyuki Ooshima

A corrugated resin tube which comprises, in at least one part of an axial direction of the tube, a corrugated portion having an undulated cross section along the axial direction, characterized in that the corrugated portion comprises at least one fiber-reinforced layer made of a thermoplastic resin or a thermoplastic elastomer, which contains inorganic fibers, and at least one resinous layer made of a thermoplastic resin or a thermoplastic elastomer, which contains no inorganic fibers or contains inorganic fibers in an amount less than the amount in the fiber-reinforced layer, wherein these layers are laminated and the outermost layer is the resinous layer. The content of the inorganic fibers in the fiber-reinforced layer is preferably from 5 to 20 wt %, and the thickness of the fiber-reinforced layer is from 30 to 70% of the whole thickness. This corrugated tube can be flexibly bent, has a vibration absorption property, and does not undergo elongation by heat or pressure, and therefore it is suitable for radiator hoses of automobiles.

Corrugated resin tube

Temperature-actuated valve device and flow passage switching valve using

Growing community of inventors

Yokohama, Japan

Tetsuo Masatake