发明公开
EP0415270A3 Opaque, laminated and stretched products and method for making them
失效
OPAQUE,LAMINATED和STRETCHED产品及其制造方法
- 专利标题: Opaque, laminated and stretched products and method for making them
- 专利标题(中): OPAQUE,LAMINATED和STRETCHED产品及其制造方法
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申请号: EP90116179.4申请日: 1990-08-23
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公开(公告)号: EP0415270A3公开(公告)日: 1991-10-23
- 发明人: Yamada, Kazuhiro , Ishibashi, Tadao
- 申请人: Chisso Corporation
- 申请人地址: 6-32, Nakanoshima 3-chome Kita-ku Osaka-shi Osaka-fu JP
- 专利权人: Chisso Corporation
- 当前专利权人: Chisso Corporation
- 当前专利权人地址: 6-32, Nakanoshima 3-chome Kita-ku Osaka-shi Osaka-fu JP
- 代理机构: Müller-Boré & Partner Patentanwälte
- 优先权: JP222456/89 19890829
- 主分类号: B32B27/32
- IPC分类号: B32B27/32
摘要:
Opaque laminated and stretched products having a total light transmittance of 50 % or less are obtained laminating at least one side of a layer obtained from a composition in which a crystalline polypropylene is blended with a cyclopentadiene type petroleum resin having a softening point of 160 °C or higher, as measured by the ring-and-ball method, in an amount of 3 to 30 % by weight based on the total weight of both, with a layer obtained from a crystalline propylene copolymer having a crystalline melting point lower than that of said crystalline polypropylene by 10 °C or more, and, then, stretching the resuting laminate at a temperature lower than the crystalline melting point of the crystalline polypropylene and the softening point of the cyclopentadiene type petroleum resin and at a stretching ratio of 2 or higher in at least a uniaxial direction.
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