发明名称 IDENTITAETSKARTE
摘要 An identity card comprising at least one outer transparent thermoplastic covering layer and a thermoplastic core layer; said card carrying at suitable points on at least one layer information which serves to identify the cardholder; said card further carrying security markings, such as guilloche figures, as a protection against forgeries; said core layer comprising incorporated fibrids. In a preferred embodiment, the core layer is a paper felt enriched with at least 80% by weight fibrids of a polyolefin, such as polyethylene, and comprising from 8 to 14% by weight pigment material, such as titanium dioxide. The core layer may also be provided with a reinforcing layer, such as a randomly perforated paper or polyester film, which is dimensionally stable during lamination of the layers under pressure at elevated temperatures of up to 180 DEG C.
申请公布号 DE2856852(A1) 申请公布日期 1980.07.17
申请号 DE19782856852 申请日期 1978.12.30
申请人 HOECHST AG 发明人 MORAW,ROLAND,DIPL.-PHYS.DR.;STEINAU,PETER,DIPL.-CHEM.DR.;PIERSON,FRITZ
分类号 B32B3/24;B32B27/00;B42D25/00 主分类号 B32B3/24
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