发明名称 |
Fibre reinforced thermoplastic sheet for hot pressing - is made with surface layer containing a parting agent e.g. waxes, metallic soaps, silicone(s), fluorocarbon(s), oils, etc. |
摘要 |
Sheet material made of textile reinforcing fibres in a thermoplastic matrix has at least one outer layer, up to 500 microns thick, which contains a parting agent. It is made in a continuous or discontinuous process where the textile reinforcing structure is impregnated with a thermoplastic while at the same time, or in a second step, at least one surface layer of the same thermoplastic but containing a parting agent is applied. The surface layer is pref. applied in the form of a film containing the parting agent, but it can also be applied as a solution or in powder form. It is pref. applied under heat and pressure and the whole assembly can be made in a continuous process on a double band press. Suitable parting agents which prevent adhesion between the die surfaces and the thermoplastic are waxes, metallic soaps, silicones, fluorocarbons, oils, etc. USE/ADVANTAGE - The material reduces the cycle time required in press forming as no separate parting agent need be applied to the metallic die surfaces.
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申请公布号 |
DE4115832(A1) |
申请公布日期 |
1992.11.19 |
申请号 |
DE19914115832 |
申请日期 |
1991.05.15 |
申请人 |
BAYER AG, 5090 LEVERKUSEN, DE |
发明人 |
BECKER, ROBERT, DIPL.-CHEM. DR., 5090 LEVERKUSEN, DE;GOLDMANN, GERD, DIPL.-ING. DR., 4150 KREFELD, DE |
分类号 |
B29C33/60;B29C70/08;B29C70/50;C08J5/04 |
主分类号 |
B29C33/60 |
代理机构 |
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