发明名称 |
Verfahren zur Herstellung einer thermoplastischen Verbundplatte |
摘要 |
A method of producing a sandwich plate that consists of a foamed core layer and two fiber-reinforced cover layers, comprising the steps of providing a sheet of a thermoplastic plastics material, such as polyetherimide, containing an amount of a suitable solvent or blowing agent; placing said sheet between two fiber-reinforced layers of a similar thermoplastic material, such as polyetherimide; placing the core web and cover layer assembly between two pressure plates; supplying heat and pressure to the pressure plates to cause foaming of the core web and cooling the pressure plates when a predetermined foam layer thickness is obtained. According to one aspect of the invention one of the cover layers has a remaining percentage of solvent that does not exceed 0,1% of weight. According to a second aspect of the invention the thermoplastic material in at least one of the cover layers is a modification having a higher chemical resistance than the thermoplastic material of the core layer. |
申请公布号 |
DE69323190(D1) |
申请公布日期 |
1999.03.04 |
申请号 |
DE1993623190 |
申请日期 |
1993.07.30 |
申请人 |
GROOT, MARTIN THEODOR DE, AMSTERDAM, NL |
发明人 |
GROOT, MARTIN THEODOR DE, AMSTERDAM, NL |
分类号 |
B29C44/00;B29C44/12;B29C44/14;B29K79/00;B29K105/04;B29L7/00;B29L9/00;B32B5/28;B32B27/00;C08J5/12;C08J9/34 |
主分类号 |
B29C44/00 |
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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