发明名称 Identity card
摘要 The application discloses an identity card consisting of a plurality of layers, of which the cover layers are highly transparent films and the layers of the card core are films of moderate to low transparency, as a result of added pigment. One core layer carries information, which can be read directly, if desired, above a security print, while the other core layer has an additional security marking, such as a guilloche print, a marking which can be read optically only with the aid of a special lamp, or a piece of magnetic tape. All the layers consist of polymers which can be fused together to form a laminate which is fused together like a monolithic block and which does not have any interfaces which allow a mechanical, thermal or chemical separation.
申请公布号 US4298217(A) 申请公布日期 1981.11.03
申请号 US19790070737 申请日期 1979.08.29
申请人 HOECHST AKTIENGESELLSCHAFT 发明人 MORAW, ROLAND;WALTER, HELMUT
分类号 B32B27/00;B42D15/10;B44F1/12;(IPC1-7):G09F3/02;B42D15/00 主分类号 B32B27/00
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