Asahi Glass Company, Limited

Kuraray Co., Ltd.

Ube Industries, Inc.

Tsuyoshi Iwasa

Atsushi Funaki

Shigeru Aida

Yoshiaki Higuchi

Takashi Yamashita

Eiichi Nishi

Naoko Sumi

Koji Nakamura

Masahide Yodogawa

Tsugunori Kashimura

Tomoharu Nishioka

Yuji Munesawa

Koichi Uchida

A multilayer tube including at least three layers including a layer (a) formed of (A) polyamide 11 and/or polyamide 12, a layer (b) formed of (B) a polyamide (semi-aromatic polyamide) including a dicarboxylic acid unit containing a terephthalic acid and/or naphthalenedicarboxylic acid unit in a proportion of 50 mol % or more based on all dicarboxylic acid units, and a diamine unit containing an aliphatic diamine unit having a carbon number of 9 to 13 in a proportion of 60 mol % or more based on all diamine units, and a layer (c) formed of (C) a fluorine-containing polymer having introduced into the molecular chain thereof a functional group having reactivity with a polyamide-based resin, is provided as a multilayer tube excellent in an alcohol gasoline permeation-preventing property, interlayer adhesion, low-temperature impact resistance, heat resistance and chemical resistance.

Multilayer tube

A laminate for a printed wiring board having a laminate structure comprising an electrical insulator layer (A) and an electrical conductor layer (B) bonded directly to each other, wherein the electrical insulator layer (A) is formed of a fluorocopolymer comprising repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a fluoromonomer excluding tetrafluoroethylene and chlorotrifluoroethylene, and repeating units (c) based on a monomer having an acid anhydride residue and a polymerizable unsaturated bond in amounts of (a) being from 50 to 99.89 mol %, (b) being from 0.1 to 49.99 mol % and (c) being from 0.01 to 5 mol %, based on ((a)+(b)+(c)), and the electrical conductor layer (B) has a surface roughness of at most 10 &#x3bc;m on the side being in contact with the electrical insulator layer (A). The laminate for a printed wiring board is excellent in signal response in a high frequency region.

Laminate for printed wiring board

To provide a multilayer laminate excellent in fuel barrier properties, fuel oil resistance, mechanical strength and interlaminar adhesion strength. A multilayer laminate having a layer of a fluororesin containing acid anhydride residue (for example, a tetrafluoroethylene/ethylene/(perfluoroethyl)ethylene/itaconic anhydride copolymer) and a layer of an amine-modified thermoplastic resin (for example, polyphenylene sulfide modified by a silane coupling agent containing an amino group). The multilayer laminate can be produced by co-extrusion and is excellent in the interlaminar adhesion strength, whereby it is suitable for a fuel hose or the like.

Multilayer laminate

To provide a laminate for a flexible printed wiring board excellent in signal response in the high frequency region. A laminate for a flexible printed wiring board having a three-layer laminated structure where a reinforcing layer (A), an electrical insulator layer (B) and an electrical conductor layer (C) are laminated in this order, wherein the electrical insulator layer (B) is made of a fluorocopolymer comprising repeating units (a) based on tetrafluoroethylene and/or chlorotrifluoroethylene, repeating units (b) based on a fluoromonomer excluding tetrafluoroethylene and chlorotrifluoroethylene, and repeating units (c) based on a monomer having an acid anhydride residue and the electrical conductor layer (C) has a surface roughness of at most 10 &#x3bc;m on the side being in contact with the electrical insulator layer (B). The laminate for a flexible printed wiring board is excellent in signal response in the high frequency region and excellent in flex resistance.

Laminate for flexible printed wiring board

A tetrafluoroethylene/ethylene copolymer composition comprising a tetrafluoroethylene/ethylene copolymer (A) and a thermoplastic fluoropolymer (B) having a crystallization temperature higher than the crystallization temperature of said tetrafluoroethylene/ethylene copolymer (A) in a mass ratio of (A)/(B)=from 99.8/0.2 to 1/99. The composition is excellent in melt processability, and its formed product is excellent in mechanical properties and fuel barrier properties.

Tetrafluoroethylene/ethylene copolymer composition

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Ichihara, Japan

Tsuyoshi Iwasa