Multi-layered anti-counterfeit label and production method and multi-layered anti-counterfeit indication method thereof
An anti-counterfeiting label, multi-level technology, applied in the directions of stamps, instruments, identification devices, etc., can solve the problems of anti-counterfeiting label products and anti-counterfeiting methods without pre-deformation and recovery characteristics, and achieve flexible and convenient implementation, cost reduction, and reliable results. Effect
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Embodiment 1
[0029] Embodiment 1: A multi-level anti-counterfeiting indication method, which utilizes the thermally induced shape memory properties of shape memory polymers, and after thermodynamic pre-deformation treatment, the morphology of the polymers gradually changes accordingly during the gradual heating process. Features are made into labels to identify the authenticity of the item.
[0030] The thermally induced shape memory effect of the thermally induced shape memory polymer is significant: the residual deformation of the polymer after thermodynamic processing is higher than 5%; the shape recovery rate is higher than 5%. The thermotropic shape memory polymer is a pure polymer or a polymer-based composite material.
[0031] A thermotropic shape memory polymer of a certain size is used as the substrate of the label, and is subjected to multiple pre-deformation treatments at a temperature higher than the initial temperature of its glass transition or melting transition to make a fi...
Embodiment 2
[0034] Embodiment 2: Taking epoxy polymer as the matrix, the process of preparing anti-counterfeiting labels with non-overlapping pre-deformation is as follows figure 1 As shown, the following process steps are included:
[0035] Heat the label to 70°C;
[0036] pressed on its surface as figure 1 (b) Indentations shown (maximum diameter of the indentation is 5 mm, depth is 2 mm, and the distance between each indentation is 10 mm);
[0037] Lower the temperature to 60°C, and press out more indentations on different areas of its surface;
[0038] Cool to room temperature. get as figure 1 (c) Finished label shown.
Embodiment 3
[0039] Example three: the process of preparing an anti-counterfeit label with overlapping pre-deformation is as follows: figure 2 As shown, the following process steps are included:
[0040] Heat the label to 70°C;
[0041] Extrude such as figure 2 (b) the first type of indentation shown;
[0042] Lower the temperature to 60°C, and use another mold with another pattern to extrude in the same area such as figure 2 (c) The second type of indentation shown;
[0043] down to room temperature to obtain figure 2 (d) Finished label shown.
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