发明名称 |
POLYMERIC AGENTS AND MATERIALS |
摘要 |
Improvements in the manufacture of multi-layer organic polymer composites are described, particularly applicable to composites including adjacent layers of a relatively water-soluble polymer (e.g. partially hydrolysed polyvinyl alcohol) and a relatively water-insoluble polymer (e.g. fully hydrolysed polyvinyl alcohol). The extruded layers are brought together within the die housing or by nipping means external to the die, or the relatively water-insoluble layer may be coated onto the relatively water-soluble layer. Specific designs of die are claimed, as are specific extrudable compositions and apparatus for conveying the same to the dies. The invention makes available for the first time a range of articles in which plastic parts are water-compatible in normal use but are completely degradable on contact with water during disposal, such as WC-disposable sanitary articles and water-degradable rigid containers for oil and petrol. |
申请公布号 |
CZ9402615(A3) |
申请公布日期 |
1995.06.14 |
申请号 |
CZ19940002615 |
申请日期 |
1993.04.23 |
申请人 |
BRITISH TECHNOLOGY GROUP INTER-CORPORATE LICENSING LIMITED |
发明人 |
TAYLOR PAUL ANTHONY;GONINAN KEVIN MARK |
分类号 |
B29C;B29C47/06;B29C47/12;B29C49/00;B29K29/00;B29L9/00;(IPC1-7):B29C47/06 |
主分类号 |
B29C |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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