Tire cord fabric and tire construction
AssigneeTeijin Limited
InventorTosuke Imamura
Life of this patent
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Abstract
A tire cord fabric is provided, the weft of which is composed of thermally modified partially oriented polyester filaments overcoated with adhesive rubbery latex. The weft having a break elongation of at least 80%, a birefringence value of at least 0.03 and dry heat shrinkage of at most 5% at 150.degree. C. for 30 minutes. The fabric shows a superior dimensional stability during crazing process, eliminating undesirable displacement of the weft along the lengthwise of the warp. The wefts in the fabric are also able to expand without breakage during tire building step, enabling the warps to distribute evenly in a spaced relationship.
Claims12
A tire cord fabric which comprises warp cords and weft filaments spaced at substantially right angles to said warp cords, said warp cords being composed essentially of high-tenacity filaments and said weft filaments being composed essentially of polyester filaments composed of ethylene terephthalate repeating units and having a break elongation of 80% to 250%, a birefringence value of 0.03 to 0.13, a dry heat shrinkage of +5% to -5% at 150.degree. C. for 30 minutes and an overcoat only on said weft filaments comprised of adhesive rubbery latex, the amount of which is in the range of 0.3% to 3% by weight of said weft filaments.
A tire comprising a rubber tread, two annular beads, and a carcass member, said carcass member being composed essentially of high-tenacity warp cords and weft filaments of polyester type composed of ethylene terephthalate repeating units having a break elongation of 80% to 250% and a dry heat shrinkage of +5% to -5% at 150.degree. C. for 30 minutes;
- said weft filaments only having an overcoat comprised of adhesive rubbery latex, the amount of which is in the range of 0.3% to 3% by weight of said weft filaments.
Dependencies are inferred from the claim text.