Color invisible pattern element and preparation method thereof
An invisible and patterned technology, applied in optical elements, polarizing elements, optics, etc., can solve problems such as liquid crystal alignment disorder, loss of hidden meaning, invisible pattern leakage, etc., to achieve high value, good anti-counterfeiting effect, and beautiful product effect
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[0059] The second aspect of the present invention provides a method for preparing the color invisible pattern element as described above, which includes the following steps:
[0060] S1: Coat the photosensitive alignment layer material on the substrate with the reflective layer, and dry;
[0061] S2: Expose different areas of the photosensitive alignment layer with linearly polarized ultraviolet light with different wave vectors, so that the material molecules of the photosensitive alignment layer have different pretilt angles;
[0062] S3: Apply nematic liquid crystal layer materials to different areas of the photosensitive alignment layer, and dry to align the liquid crystal molecules;
[0063] S4: curing the nematic liquid crystal layer to obtain the color invisible pattern element.
Example Embodiment
[0066] Example 1 : See figure 1 with 2 As shown, Example 1 provides a color invisible pattern element. The color invisible pattern element includes a nematic liquid crystal layer 1, a photosensitive alignment layer 2, and a reflective layer 3. The photosensitive alignment layer 2 is disposed on the reflective layer. 3 and the nematic liquid crystal layer 1; the photosensitive alignment layer 2 includes up to three regions with different molecular pretilts relative to the plane of the reflective layer 3. The reflective layer 3 is aluminum-plated PET.
[0067] The color invisible pattern element is prepared by the following method, which specifically includes the following steps:
[0068] Preparation of nematic liquid crystal layer material: by weight, add 2 parts of photoinitiator (IRGACURE369) to a mixed nematic liquid crystal material composed of 75 parts of liquid crystal molecules I, 10 parts of liquid crystal molecules II and 15 parts of liquid crystal molecules III. , Dissol...
Example Embodiment
[0075] Example 2 : See figure 1 with 2 As shown, Example 2 provides a color invisible pattern element. The color invisible pattern element includes a nematic liquid crystal layer 1, a photosensitive alignment layer 2, and a reflective layer 3. The photosensitive alignment layer 2 is disposed on the reflective layer. 3 and the nematic liquid crystal layer 1; the photosensitive alignment layer 2 includes up to three regions with different molecular pretilts relative to the plane of the reflective layer 3. The reflective layer 3 is a cholesteric liquid crystal layer.
[0076] The color invisible pattern element is prepared by the following method, which specifically includes the following steps:
[0077] Preparation of nematic liquid crystal layer material: by weight, add 2 parts of photoinitiator (IRGACURE369) to a mixed nematic liquid crystal material composed of 75 parts of liquid crystal molecules I, 10 parts of liquid crystal molecules II and 15 parts of liquid crystal molecule...
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