Steel cord structure in heavy duty tires
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United States of America Patent
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Issued Date -
Feb 10, 2005
app pub date -
Sep 20, 2004
filing date -
Aug 28, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides structure of steel cord in heavy duty tires, in which the adhesive strength between filament and rubber, and penetrating property of rubber are improved by making the twist direction of core and strand different in the steel cord comprising core and strand filament, and by making the pitch or the twist period of core and strand different. In particular, this structure is applied to steel cord of 3+8*d(HT) which is used in heavy duty tires. In this application, twist direction of core filament is in the S direction and twist direction of strand filament is in the Z direction, and the ratio of the pitch of core filament (CP) and the pitch of strand filament (SP) is between 0.50 and 0.94.
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