发明公开
EP1375109A2 Process for preparing rubber sheet and tread and studless tire using same
有权
Verfahren zur Herstellung eines spikelosen Reifens mit einem Reifenlaufstreifen
- 专利标题: Process for preparing rubber sheet and tread and studless tire using same
- 专利标题(中): Verfahren zur Herstellung eines spikelosen Reifens mit einem Reifenlaufstreifen
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申请号: EP03014304.4申请日: 2003-06-25
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公开(公告)号: EP1375109A2公开(公告)日: 2004-01-02
- 发明人: Tsumori, Isamu Sumitomo Rubber Industries Ltd. , Minakoshi, Akira Sumitomo Rubber Industries Ltd. , Kikuchi, Naohiko Sumitomo Rubber Industries Ltd. , Tanaka, Yoshikazu Sumitomo Rubber Industries Ltd. , Iwata, Takuzo Sumitomo Rubber Industries Ltd. , Taniguchi, Norio Sumitomo Rubber Industries Ltd.
- 申请人: SUMITOMO RUBBER INDUSTRIES LIMITED
- 申请人地址: 6-9, 3-chome, Wakinohama-cho, Chuo-ku Kobe-shi, Hyogo-ken JP
- 专利权人: SUMITOMO RUBBER INDUSTRIES LIMITED
- 当前专利权人: SUMITOMO RUBBER INDUSTRIES LIMITED
- 当前专利权人地址: 6-9, 3-chome, Wakinohama-cho, Chuo-ku Kobe-shi, Hyogo-ken JP
- 代理机构: Manitz, Finsterwald & Partner GbR
- 优先权: JP2002190988 20020628; JP2002190989 20020628
- 主分类号: B29C47/02
- IPC分类号: B29C47/02 ; B29C70/14 ; B29D30/52 ; B60C11/14
摘要:
The present invention provides a studless tire excellent in performance on ice and snow in which digging friction is improved without losing adhesion friction. The studless tire has a tread comprising specific short fiber or plate-like material dispersed in diene rubber so as to be oriented in the tread thickness direction, wherein when measured at 25°C the tread has a complex elastic modulus E1 in the tread thickness direction, and the sheet has a complex elastic modulus Eα in the extrusion direction and a complex elastic modulus Eβ in a 90° direction from the extrusion direction, when the rubber composition is made into 2 mm sheets with a roller and these moduli fulfill the following equation, 60 ≤ (E1-Eβ)/(Eα-Eβ) × 100 ≤ 100 and the tread has a specific tread rubber hardness. The tire is obtained using a tread prepared by extruding a rubber composition containing diene rubber and specific short fiber or plate-type material in a tube shape, thereby orienting the short fiber in the circumferential direction of the tube shaped rubber, then cutting the obtained rubber sheet parallel to the extrusion direction, rotating each piece 90° and laminating.
公开/授权文献
- EP1375109B1 Process for preparing a studless tire having a tread 公开/授权日:2007-10-31
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