| 摘要 |
PURPOSE: A pneumatic radial tire with improved uniformity capacity is provided to improve deformation caused by heat by applying PEN(Polyethylene-Naphthalene) having thermal shrinkage more excellent than nylon 66. CONSTITUTION: A pneumatic radial tire with improved uniformity capacity includes capply having PEN fiber cords. The PEN fiber cord is 500¯3000 denia for balance between components comprising the tire. The PEN is a high molecular compound and has an excellent structural stability by heat and tension with two benzene groups based on polyester. The thermal shrinkage of the PEN capply fiber cord is shrunk below 20 percent than nylon 66 used for existing capply fiber cords. Accordingly, the capply including PEN fiber cords of which the thermal deformation at high temperature in vulcanizing the tire is small largely improves the capply deformation caused by the thermal shrinkage than the capply including the nylon 66 fiber cords.
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