LED lamp coating film with anti-yellowing performance, and preparation method thereof
An LED lamp and anti-yellowing technology, which is applied in the field of LED lamp coating preparation, can solve the problems of easy yellowing of the coating, insufficient mechanical properties of the coating, easy cracking, etc., and achieve excellent mechanical properties and excellent anti-yellowing ability. Effect
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[0014] The invention provides a method for preparing an LED lamp film with anti-yellowing performance, the preparation method comprising:
[0015] (1) After mixing polytetrafluoroethylene, silane coupling agent, polyacrylate, fatty acid ester, pectin, lignin, silica sol and alcohol solution, a coating solution is obtained;
[0016] (2) using the substrate as a film-coating matrix, immersing the substrate in the film-coating solution prepared in step 1;
[0017] (3) Carrying out hot air drying and finalizing the substrate;
[0018] (4) The shaped substrate is subjected to a heat-pressing treatment with a smooth roller to obtain a coating film for the LED lamp.
[0019] In a preferred embodiment of the present invention, relative to 100 parts by weight of polytetrafluoroethylene, the amount of the silane coupling agent is 8-13 parts by weight, and the amount of the polyacrylate is 10-20 parts by weight part, the consumption of the fatty acid ester is 15-25 parts by weight, the...
Embodiment 1
[0028] Mix polytetrafluoroethylene, silane coupling agent, polyacrylate, fatty acid ester, pectin, lignin, silica sol and alcohol solution to prepare a coating liquid; use the substrate as the coating matrix, and use the substrate in step 1 Immerse in the prepared coating liquid (the time of immersion is 10min); carry out hot air drying and shaping of the substrate (time is 20min, temperature is 150 ℃); the substrate after shaping is subjected to smooth roller hot pressing treatment (pressure is 0.3Mpa , the speed is 3m / min), to get the LED lamp film. Wherein, relative to 100g of polytetrafluoroethylene, the consumption of the silane coupling agent is 8g, the consumption of the polyacrylate is 10g, the consumption of the fatty acid ester is 15g, and the consumption of the pectin is 2g , the dosage of the lignin is 1g, the dosage of the silica sol is 2g and the dosage of the alcohol solution is 100g. The elongation at break of the prepared film was 890%, and the strength at br...
Embodiment 2
[0030] Mix polytetrafluoroethylene, silane coupling agent, polyacrylate, fatty acid ester, pectin, lignin, silica sol and alcohol solution to prepare a coating liquid; use the substrate as the coating matrix, and use the substrate in step 1 Immerse in the prepared coating solution (the time of immersion is 20min); the substrate is dried and shaped by hot air (the time is 30min, and the temperature is 200°C); , the speed is 5m / min), to obtain the LED lamp film. Wherein, relative to 100g of polytetrafluoroethylene, the consumption of the silane coupling agent is 13g, the consumption of the polyacrylate is 20g, the consumption of the fatty acid ester is 25g, and the consumption of the pectin is 12g , the dosage of the lignin is 4g, the dosage of the silica sol is 10g and the dosage of the alcohol solution is 300g. The elongation at break of the prepared film was 910%, and the strength at break was 46 MPa.
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