| 发明名称 | Security documents and colour laser marking methods for securing them | ||
| 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. | ||
| 申请公布号 | US8975211(B2) | 申请公布日期 | 2015.03.10 |
| 申请号 | US201113885750 | 申请日期 | 2011.12.02 |
| 申请人 | Agfa-Gevaert N.V. | 发明人 | Waumans Bart;Geuens Ingrid;Callant Paul;Van Aert Hubertus |
| 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 | 主分类号 | B41M3/14 |
| 代理机构 | Leydig, Voit & Mayer, Ltd. | 代理人 | Leydig, Voit & Mayer, Ltd. |
| 主权项 | 1. A security document precursor including, in order, at least: a) a transparent biaxially stretched polyethylene terephthalate foil; b) a colourless colour forming layer containing at least an infrared absorber, a colour forming component and a polymeric binder; and c) a polymeric support; wherein the colourless colour forming layer contains at least one component forming a compound having a melting temperature of less than 20° C. upon laser marking the colourless colour forming layer with an infrared laser. | ||
| 地址 | Mortsel BE | ||