INNER LINER FOR PNEUMATIC TIRES, METHOD FOR PRODUCING SAME, AND PNEUMATIC TIRE

Title:

INNER LINER FOR PNEUMATIC TIRES, METHOD FOR PRODUCING SAME, AND PNEUMATIC TIRE

Document Type and Number:

WIPO Patent Application WO/2012/165441

Kind Code:

A1

Abstract:

A purpose of the present invention is to provide an inner liner for pneumatic tires, which has excellent melt moldability and thus has high gas barrier properties and is capable of maintaining the characteristics such as the gas barrier properties even in cases where the inner liner experiences deformation such as stretching or bending when in use. Another purpose of the present invention is to provide a method for producing an inner liner having the above-mentioned characteristics, while suppressing increase of the production cost. The present invention is an inner liner for pneumatic tires, which comprises eight or more resin layers, and which is characterized in that: the inner liner comprises, as the resin layers, a layer (A) that is formed of a resin composition containing a gas barrier resin and a layer (B) that is arranged adjacent to the layer (A) and formed of a resin composition containing an elastomer; both of the elongational viscosity (ηA) of the resin composition of the layer (A) and the elongational viscosity (ηB) of the resin composition of the layer (B) at a predetermined temperature are 1,000 Pa·s or more; and the elongational viscosity ratio ηA/ηB is 0.2-10 (inclusive).

Inventors:

HAYASHI NAHOTO (JP)
HIKASA MASAO (JP)
TANAKA YUSUKE (JP)
KITANO HIDEKI (JP)
TANAKA TAKATSUGU (JP)
AMAMOTO TETSUO (JP)

Application Number:

PCT/JP2012/063809

Publication Date:

December 06, 2012

Filing Date:

May 29, 2012

Export Citation:

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Assignee:

KURARAY CO (JP)
BRIDGESTONE CORP (JP)
HAYASHI NAHOTO (JP)
HIKASA MASAO (JP)
TANAKA YUSUKE (JP)
KITANO HIDEKI (JP)
TANAKA TAKATSUGU (JP)
AMAMOTO TETSUO (JP)

International Classes:

B29C48/18; B60C5/14; C08F8/00

Foreign References:

JP2003026931A	2003-01-29
JP2009274680A	2009-11-26
JPH0640207A	1994-02-15

Other References: