Kuraray Co., Ltd.

Bridgestone Corporation

Satoshi Yamakoshi

Shinji Tai

Hiroshi Kawai

Masao Hikasa

Kouta Isoyama

Kentaro Yoshida

Hideki Kitano

Tetsuo Amamoto

Yuwa Takahashi

Takatsugu Tanaka

Naoki Kawakami

A pelletized resin composition according to the present invention contains an ethylene-vinyl alcohol resin (A), a polyamide (B), and a lower fatty acid magnesium salt (C) each in a specific amount, wherein the polyamide resin (B) is dispersed in the ethylene-vinyl alcohol resin (A) with an average dispersed particle diameter of 1 &#x3bc;m or less as determined using an electron microscope, and the lower fatty acid magnesium salt (C) is dispersed in both the ethylene-vinyl alcohol resin (A) and the polyamide resin (B). Accordingly, a pelletized resin composition that is superior in hue can be obtained. In addition, a film that is superior in thermal stability in the film formation, the appearance immediately after the film formation, and the appearance after the heating treatment is obtained.

Ethylene-vinyl alcohol resin composition pellet

Disclosed is an inner liner for a pneumatic tire, the inner liner including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing an elastomer, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 500 g/15 mm. The layer A and the layer B are preferably alternately laminated.

Inner liner for pneumatic tire and method for producing the same

An object of the invention is to provide a multilayered structure having very superior gas barrier properties and being excellent in flex resistance, pinhole resistance, stretchability, thermoformability and interlayer adhesiveness, and having superior durability enabling characteristics such as high gas barrier properties to be maintained even if used with deformation such as flexion and/or stretching, and to provide a laminate in which the multilayered structure is used, and a production method thereof. Provided by the present invention is a multilayered structure in which at least 4 resin-layers constituted with a resin composition containing an ethylene-vinyl alcohol copolymer are contiguously laminated. A single layer of the resin layer has an average thickness of preferably no less than 0.01 &#x3bc;m and no greater than 10 &#x3bc;m. The average thickness is preferably no less than 0.1 &#x3bc;m and no greater than 1,000 &#x3bc;m. When the content of ethylene units of the ethylene-vinyl alcohol copolymer is no less than 3 mol % and no greater than 70 mol %, the saponification degree is preferably no less than 80 mol %.

Multilayered structure and laminate, and method for production of the same

Disclosed is a multilayered structure that includes no less than 8 resin-layers, the resin-layer including a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing a thermoplastic resin, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 450 g/15 mm. The layer A and the layer B may be alternately laminated. Moreover, the average thickness of single layer of at least one selected from the layer A and the layer B is preferably no less than 0.01 &#x3bc;m and no greater than 10 &#x3bc;m.

Multilayered structure and method for producing the same

Growing community of inventors

Okayama, Japan

Satoshi Yamakoshi