Polyurethane synthetic leather for high-grade electronic packages and certificates
A technology of polyurethane and synthetic leather, which is applied in application, leather surface treatment, small raw leather/large raw leather/leather/fur treatment, etc. It can solve the problems of unsatisfactory high-end electronic product packaging leather, hardening, and uneven quality of synthetic leather. , to achieve an excellent protective effect
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Example Embodiment
[0025] Embodiment 1,
[0026] 1) Mix 40 parts of silicone-modified polyurethane prepolymer, 10 parts of polyisocyanate and 1.5 parts of accelerator triethylenediamine and stir evenly to obtain a colorless transparent paste with a viscosity of 500CPS / 25℃;
[0027] 2) The above-mentioned colorless transparent paste is coated on the outer surface of the polyurethane synthetic leather base layer with a 140-purpose printing roller;
[0028] 3) Then it is dried at 80°C and then cured at 130°C for 5 minutes to obtain polyurethane synthetic leather.
[0029]
Example Embodiment
[0030] Embodiment 2,
[0031] 1) Mix 80 parts of silicone-modified polyurethane prepolymer, 15 parts of polyisocyanate and 1.0 part of accelerator dibutyltin dilaurate and stir evenly to obtain a colorless transparent paste with a viscosity of 800CPS / 25℃;
[0032] 2) The above-mentioned colorless transparent paste is coated on the outer surface of the polyurethane synthetic leather base layer with a 160-purpose printing roller;
[0033] 3) Then it is dried at 100°C and then cured at 150°C for 3 minutes to obtain polyurethane synthetic leather.
[0034]
Example Embodiment
[0035] Embodiment 3,
[0036] 1) Mix 100 parts of silicone-modified polyurethane prepolymer, 20 parts of polyisocyanate and 2 parts of accelerator stannous octoate and stir evenly to obtain a colorless transparent paste with a viscosity of 200CPS / 25℃;
[0037] 2) The above-mentioned colorless transparent paste is coated on the outer surface of the polyurethane synthetic leather base with a 120-purpose printing roller;
[0038] 3) Then it was dried at 90°C and then cured at 140°C for 4 minutes to obtain polyurethane synthetic leather.
[0039] The performance indicators of the polyurethane synthetic leather prepared in the above-mentioned examples 1-3 are compared with the existing polyurethane synthetic leather as shown in the following table:
[0040]
[0041] It can be seen from the above table that compared with ordinary packaging leather, the high-grade polyurethane synthetic leather for electronic packaging and documents of the present invention has excellent touch, y...
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