| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve oil resistance, crack resistance due to elongation, and tear resistance at a high-temperature required in machining of a corrugated sash bar. Ž<P>SOLUTION: A rubber composition used for corrugated sash bars 3R, 3L is formed from three kinds of rubber of acrylonitril butadiene rubber, natural rubber, and chloroprene rubber. When a polymer contained in the rubber composition forming the corrugated sash bar is set to be 100, an additive amount of the natural rubber is within a range of 10-30 pts.wt. and the chloroprene rubber is within a range of 10-30 pts.wt. When the rubber to be used is set to be 100, the content of the acrylonitril is within a range of 20-30 wt.% and dynamic modulus of elasticity E' at 140°C is not less than 50% of the dynamic modulus of elasticity E' at 25°C. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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