| 发明名称 |
PIEZOCHROMIC SECURITY ELEMENT |
| 摘要 |
The invention discloses a reversibly piezochromic security element for the forgery-protection of value documents, the security element being characterized in that it comprises a collection of optically contrasting pigment particles in a film or a coating layer of an elastic polymer. In a particular embodiment, the particles are optically variable pigment flakes, oriented in a position which is substantially different from an alignment in the plane of the film or coating layer.
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| 申请公布号 |
US2012091699(A1) |
申请公布日期 |
2012.04.19 |
| 申请号 |
US201013263275 |
申请日期 |
2010.04.07 |
| 申请人 |
KRUEGER JESSICA;DEGOTT PIERRE;MACPHERSON CHARLES;DESPLAND CLAUDE-ALAIN;SCHMID MATHIEU;BANK OF CANADA DEPARTMENT OF BANKING OPERATION;SICPA HOLDING SA |
发明人 |
KRUEGER JESSICA;DEGOTT PIERRE;MACPHERSON CHARLES;DESPLAND CLAUDE-ALAIN;SCHMID MATHIEU |
| 分类号 |
B42D15/10;B05D3/00;B05D5/06;B32B5/16;B32B7/02;B42D15/00;C09K9/02;H01F1/42 |
主分类号 |
B42D15/10 |
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