发明公开
- 专利标题： An ivory-like key material and a method for producing the same
- 专利标题（中）： 一种象样的关键材料及其生产方法
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申请号： EP88850436.2申请日： 1988-12-23
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公开(公告)号： EP0323425A3公开(公告)日： 1990-10-17
- 发明人: Oshima, Yataka
- 申请人： YAMAHA CORPORATION
- 申请人地址： 10-1, Nakazawa-cho Hamamatsu-shi Shizuoka-ken JP
- 专利权人： YAMAHA CORPORATION
- 当前专利权人： YAMAHA CORPORATION
- 当前专利权人地址： 10-1, Nakazawa-cho Hamamatsu-shi Shizuoka-ken JP
- 代理机构： Ström, Tore
- 优先权： JP335735/87 19871228; JP335736/87 19871228
- 主分类号： C08L89/00
- IPC分类号： C08L89/00 ; G10C3/12
摘要：
In production of a casein-type artificial key material for keyboard musical instruments, fine grains of an elastomer such as polyurethane elastomer are added to a mixture to be kneaded together so that, in the structure of the product, islanded elastomer should be uniformly dispersed in the matrix of casein. Inbred brittleness of casein is much improved by inclusion of the elastomer and strong bond between casein and the elastomer well removes the danger of interface separation.
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