High temperature-resistant and UV (Ultraviolet)-resistant protective film and preparation method thereof

Abstract

The invention discloses a high temperature-resistant and UV (Ultraviolet)-resistant protective film and a preparation method thereof. The high temperature-resistant and UV-resistant protective film comprises a PE (Polyethylene)-based film layer and an adhesive layer, wherein the adhesive layer is formed by coating the surface of the PE-based film layer with a heat-resistant and UV-resistant pressure-sensitive adhesive and drying; the pressure-sensitive adhesive is prepared from the following raw materials in parts by weight: 25 to 35 parts of acrylate resin, 55 to 70 parts of ethyl acetate, 1to 2 parts of isocyanate curing agent, 0.1 to 0.5 part of UV absorbent and 0.4 to 0.7 part of free radial collecting agent. Compared with the prior art, the preparation method disclosed by the invention is reasonable in raw material proportioning and simple in preparation technology, and a release force of the high temperature-resistant and UV-resistant protective film provided by the invention ranges from 7N / m to 9N / m; after long-time irradiation under high temperature and UV, the release force of the high temperature-resistant and UV-resistant protective film changes within + / -35 percent, and the high temperature-resistant and UV-resistant protective film has no wrinkling, no degumming, no adhesive residue and no chromatic aberration after long-time irradiation under the UV; the high temperature-resistant and UV-resistant protective film can be used for protecting the surfaces of backlight displays in electronic products such as a computer, a television and a mobile phone and can beused for protecting an overlaid shipment transportation process of the backlight displays.

Description

technical field [0001] The invention relates to a high-temperature-resistant and ultraviolet-resistant protective film and a preparation method thereof. Background technique [0002] For some products, such as: ordinary glass, tempered glass, LCD, LED, light guide plate production, diffusion film, PC, PMMA, PET smooth sheet, high-gloss injection molded parts, etc., they will be put into containers or placed in the open air during transportation. During this process, a high temperature may be generated in the container, and the temperature may even reach 60°C. While placed in the open air, it will directly receive ultraviolet radiation. [0003] When the ordinary protective film is irradiated by UV, the free radicals formed will reduce the cohesion of the PE film, break the long carbon chain of the polyethylene and acrylic glue, and cause the glue to lose its function, the peeling force will decrease, and the appearance color will change. question. Contents of the inventi...

AI Technical Summary

Problems solved by technology

[0003] When the ordinary protective film is irradiated by UV, the free radicals formed will reduce the cohesion of the PE film, break the long carbon chain of the polyethylene and acrylic glue, and cause the glue to lose its function, the peeling force will decrease, and the appearance color will change. question