| 摘要 |
PURPOSE: A pneumatic tire having a capply cord made of POK(Polyketone) and N(Nylon)-66 is provided to improve durable performance better than a capply cord using N-66 independently by using conjugate fibers of POK and N-66 composed of POK with excellent structural stability and durability and N-66 with adhesive property and structural stability. CONSTITUTION: In a pneumatic tire, a capply cord(4) is composed of conjugate fibers consisting of POK and N-66 that are in the rate of 1:1¯2 or 1¯2:1. The TPI(Twist Per Inch) of the conjugate fiber is 20¯60 and EPI(Ends Per Inch) is 20¯40. POK or N-66 is 500¯2000 denia. Each contraction percentage of the POK and N-66 are 4% and 5%, respectively. If TPI of POK and N-66 is below 20, the rectilinearity and fatigue property of the cord are reduced or if the TPI is over 60, the physical property such as the strength of the cord is decreased.
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