发明名称 |
Process for expanding thermoformable materials having clear surfaces and the resultant products |
摘要 |
A process for producing a clear surface on expanded thermoformable material is disclosed. A film layer of non bondable plastic material is disposed adjacent the clear plastic material to be expanded. After the expansion process the film layer is removed leaving a clear smooth surface.
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申请公布号 |
US4315051(A) |
申请公布日期 |
1982.02.09 |
申请号 |
US19800115336 |
申请日期 |
1980.01.25 |
申请人 |
ROURKE, ROSEMARY |
发明人 |
ROURKE, ROSEMARY |
分类号 |
B29C55/02;B29C67/00;(IPC1-7):B32B3/12;B29C17/02 |
主分类号 |
B29C55/02 |
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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