发明名称 |
Pneumatic radial tire having inner carcass ply cord tension smaller than the outer carcass ply cord tension |
摘要 |
A pneumatic radial tire comprises a carcass comprising an outer carcass ply made of cords having a first heat-shrinkage-percentage K1 and an inner carcass ply is made of cords having a second heat-shrinkage-percentage K2 different from the first heat-shrinkage-percentage K1, and the cord tension of the inner carcass ply is smaller than the cord tension of the outer carcass ply. A method of making the tire comprises steps of making the outer carcass ply of cords having a first heat-shrinkage-percentage K1, making the inner carcass ply of cords having a second heat-shrinkage-percentage K2, wherein the first heat-shrinkage-percentage K1 at 150 degrees C. is 120 to 160% of the second heat-shrinkage-percentage K2 at 150 degrees C., and heating and vulcanizing a raw tire to heat-shrink the outer carcass ply cords in a larger degree than the inner carcass ply.
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申请公布号 |
US5656108(A) |
申请公布日期 |
1997.08.12 |
申请号 |
US19960627130 |
申请日期 |
1996.04.03 |
申请人 |
SUMITOMO RUBBER INDUSTRIES, LTD. |
发明人 |
SAKAMOTO, MASAYUKI;OMOKAWA, TOSHIHIKO;HANYA, MASAHIRO |
分类号 |
B60C9/02;B29D30/06;B29D30/30;B60C9/04;B60C9/06;B60C9/08;B60C9/13;(IPC1-7):B60C9/02;B60C15/00 |
主分类号 |
B60C9/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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