| 摘要 |
PROBLEM TO BE SOLVED: To enhance a fracture level and an adhesion level of a rubber member that is composed of neighboring rubbers having the equal rigidity and different fracture strengths and has an interface therebetween. SOLUTION: The rubber member is composed of neighboring rubbers having the equal fracture strengths and different rigidity and has an interface therebetween, where the minimum value of the fracture strengths does not substantially exist within 3 mm of the interface, preferably on the side of a rubber having a lower rigidity. Alternatively, the rubber member is composed of neighboring rubbers having the equal fracture strengths and different rigidity and has an interface therebetween, where the minimum value of the rubber rigidity does not substantially exist within 3 mm of the interface, preferably on the side of a rubber having a lower rigidity. COPYRIGHT: (C)2008,JPO&INPIT
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