Ube Industries, Inc.

Riyousuke Sasaki

Koji Nakamura

Kazutoshi Tsuboi

Hiroki Akatsu

Hideki Fujimura

Hideki Harada

Shinichi Hirayama

Riyuu Fukuda

Tetsurou Hiroki

A multilayer tube having excellent low temperature impact resistance, breakage pressure strength at high temperature, flexibility, dimensional stability, and elution resistance of low molecular weight substances and ion components. The multilayer tube has a layer containing an aliphatic polyamide composition having a predetermined range of a bending elastic modulus; a layer containing a modified polyolefin has a melting point over a predetermined temperature, and the aliphatic polyamide composition contains an aliphatic polyamide having a predetermined range of a methylene group/amide group number ratio, an elastomer polymer having a constituent unit derived from a carboxyl group and/or acid anhydride group-containing unsaturated compound, and a plasticizer having a certain structure if necessary; and the thickness of the layer containing the aliphatic polyamide composition is a specific ratio or more of the total wall thickness of the tube.

Multilayer tube

Provided is a composite body in which a resin and a metal are contact-bonded with excellent adhesive force. Also provided is a composite body which is suppressed in decrease of bonding strength between a resin and a metal due to water absorption of the resin even if the composite body is left in rain or water, or is left in a high humidity environment or the like for a long period of time. The present invention relates to a composite body which is obtained by contact-bonding a thermoplastic resin (A) and a metal (B), and which is characterized in that the thermoplastic resin (A) is a polyamide elastomer (1A) or a thermoplastic resin composition (2A) that contains a water absorbent thermoplastic resin (2a) and a metal hydroxide (2b).

Composite body of metal and thermoplastic resin

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Ube, Japan

Riyousuke Sasaki