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1. 发明申请

US20020157747A1 Tire, device for extruding unvulcanized tread rubber for the tire, and method of extruding unvulcanized tread rubber for the tire 审中-公开
标题翻译：用于轮胎的挤出未硫化胎面橡胶的轮胎，用于轮胎的未硫化胎面橡胶的挤出方法
公开(公告)号：US20020157747A1
公开(公告)日：2002-10-31
申请号：US10093378
申请日：2002-03-11
申请人： BRIDGESTONE CORPORATION
发明人： Go Shimada , Kenichiro Irimiya , Eiichiro Yamane
IPC分类号： B29D030/08
CPC分类号： B60C11/1346 , B29C48/07 , B29C48/12 , B29C48/19 , B29C48/49 , B29D30/52 , B29L2030/002 , B60C11/047 , B60C11/13
摘要： A crack suppressing rubber, which has elongation-at-break which is superior to elongation-at-break of a cap rubber, is disposed so as to reinforce a vicinity of a groove bottom of a circumferential direction narrow groove provided in the vicinity of a shoulder of a tire tread. Due to this, generation of cracks from the vicinity of the groove bottom, at a time when land portions at an outer side of the circumferential direction narrow groove are greatly deformed due to a large lateral force or due to recesses and projections of a road surface or the like, and growth of generated cracks are suppressed. As a result, breaking of land portions at outermost sides in a widthwise direction of a tire, and separation of the tread can be effectively suppressed. Namely, in accordance with the present invention, there is provided a tire which is suited to heavy-load vehicles and in which generation of cracks from groove bottoms of tread grooves (circumferential direction grooves in vicinities of shoulder portions, in particular) and growth of generated cracks can be suppressed.
摘要翻译：将具有优于帽橡胶的断裂伸长率的断裂伸长率的裂纹抑制橡胶配置成加强设置在附近的周向狭槽的槽底附近轮胎胎面的肩膀由此，由于横向力较大或由于路面的凹凸而导致在周向狭槽的外侧的陆部大幅度变形的情况下，从槽底附近产生裂纹等等，并且抑制了所产生的裂纹的生长。结果，可以有效地抑制轮胎的宽度方向上的最外侧的陆部断裂和胎面的分离。也就是说，根据本发明，提供一种适用于重载车辆的轮胎，其中，胎面槽的槽底（特别是肩部附近的周向槽）产生裂纹，并且生长可以抑制产生的裂缝。

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