Ube Industries, Inc.

Other

Yoshiro Iwata

Eiichi Nishi

Noriyuki Isobe

Masako Nagashima

Tomoharu Nishioka

Shinji Ohara

Hideki Fujimura

Shinya Matsuda

Masahiko Emoto

A corrugated polyamide tube composed of a corrugated outer tube layer of polyamide resin and a flat inner tube layer fixed to the outer tube layer at bottom portions thereof, in which the inner tube layer is made essentially of a polyetheramide elastomer.

Corrugated polyamide tube

A hydraulic or pneumatic device is provided, which comprises a tube comprising a polyamide resin composition comprising (A) from 70 to 97% by weight, based on the weight of the polyamide resin composition, of a polyamide resin and (B) from 3 to 30% by weight, based on the weight of the polyamide resin composition, of a plasticizer comprising an ester of p- and/or o-hydroxybenzoic acid with a C&#x2013;Caliphatic alcohol having a branched chain and a component comprising a rubber compound comprising a polar rubber as a main component, and which exhibits a high reliability over an extended period of time.

Method of improving airtightness of hydraulic or pneumatic device with polyamide resin tube

A hose for fuel having a laminated structure comprising an inner layer (A) made of a ethylene/tetrafluoroethylene copolymer adhesive to a polyamide resin and an outer layer (B) made of a polyamide resin, is formed. Such a hose for fuel is excellent in interlaminar adhesive strength and also excellent in antistatic properties and fuel permeation-preventing properties, and particularly, the dependency of the interlaminar adhesive strength on the take-up speed during the co-extrusion molding, is small.

Hose for fuel

Disclosed is a process for preparing spherical polyamide having an average grain diameter of 100 .mu.m or less which comprises polymerizing monomers for preparing the polyamide under heating at a temperature higher than the melting points of the monomers and the polyamide while melting the monomers in a polymerization medium under stirring whereby dispersing the formed polyamide with fine particles in the polymerization medium and then cooling the resulting mixture.

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Yamaguchi, Japan

Yoshiro Iwata