发明授权
- 专利标题： Security documents and colour laser marking methods for securing them
- 专利标题（中）： 安全文件和彩色激光打标方法
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申请号： US13885750申请日： 2011-12-02
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公开(公告)号： US08975211B2公开(公告)日： 2015-03-10
- 发明人: Bart Waumans , Ingrid Geuens , Paul Callant , Hubertus Van Aert
- 申请人： Bart Waumans , Ingrid Geuens , Paul Callant , Hubertus Van Aert
- 申请人地址： BE Mortsel
- 专利权人： Agfa-Gevaert N.V.
- 当前专利权人： Agfa-Gevaert N.V.
- 当前专利权人地址： BE Mortsel
- 代理机构： Leydig, Voit & Mayer, Ltd.
- 优先权： EP10193894 20101207
- 国际申请： PCT/EP2011/071605 WO 20111202
- 国际公布： WO2012/076406 WO 20120614
- 主分类号： B41M3/14
- IPC分类号： B41M3/14 ; B41M5/26 ; B41M5/327 ; B41M5/337 ; B42D15/00 ; B41J2/44 ; B41M5/30 ; B32B27/36 ; B32B27/08 ; B42D25/41 ; B42D25/00 ; B41M5/333
摘要：
A security document precursor including, in order, at least: a) a transparent biaxially stretched polyethylene terephthalate foil; b) a colorless color forming layer containing at least an infrared absorber, a color forming component and a polymeric binder; and c) a polymeric support; wherein the colorless color forming layer contains at least one component forming a compound having a melting temperature of less than 20° C. upon laser marking the colorless color forming layer with an infrared laser. Methods for securing a security document using the security document precursor are also disclosed.
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