METHOD FOR MANUFACTURING PNEUMATIC TIRE

Title:

METHOD FOR MANUFACTURING PNEUMATIC TIRE

Document Type and Number:

WIPO Patent Application WO/2013/108464

Kind Code:

A1

Abstract:

A manufacturing method using a rigid core, wherein high-speed endurance performance is enhanced while breakage of band cords is suppressed. This method for manufacturing a pneumatic tire includes a green tire formation process for forming a green tire by affixing tire-constituting members in sequence to a rigid core. The green tire formation process includes a band ply formation step for winding a ribbon-shaped strip in which a band cord sequence is coated with a topping rubber into a helical shape. The band cord comprises a composite cord in which first strands of aramid fiber and second strands of heat-shrinkable organic fiber are twisted together. The stress-elongation curve of the composite cord has a low-elasticity region from the origin to the inflection point, and a high-elasticity region past the inflection point. The elongation of the composite cord is in the range of 0.9-3.3% at the inflection point, and the modulus of the composite cord is in the range of 11-31 N/% in the low-elasticity region.

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Inventors:

FUKUMOTO TORU (JP)

Application Number:

PCT/JP2012/078187

Publication Date:

July 25, 2013

Filing Date:

October 31, 2012

Export Citation:

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Assignee:

SUMITOMO RUBBER IND (JP)

International Classes:

B29D30/16; B60C9/20

Foreign References:

JP2011161896A	2011-08-25
JPH05338409A	1993-12-21
JPH01247204A	1989-10-03
JP2006240498A	2006-09-14
JPH04169304A	1992-06-17
JPH11254906A	1999-09-21

Other References: