Polyester film protective film

Abstract

The invention relates to a polyester film protective film which comprises a polyester film and a pressure-sensitive adhesive layer coated on the surface of the polyester film, and the pressure-sensitive adhesive layer contains acrylate resin; the acrylate resin is prepared from a diolefin monomer, a hard monomer, a soft monomer and a functional monomer through free radical polymerization, and the weight parts of the diolefin monomer, the hard monomer, the soft monomer and the functional monomer are as follows: 2 to 10 parts of the diolefin monomer, 6 to 14 parts of the hard monomer, 68 to 84 parts of the soft monomer and 5 to 12 parts of the functional monomer. The diolefin monomer is introduced for free radical polymerization, so that a macromolecular main chain can be formed, a long branched chain can be generated, intermolecular entanglement is increased, meanwhile, large components can be connected together, intermolecular cohesion is increased, and the defect of die cutting powder falling can be effectively overcome; meanwhile, the matched polyether plasticizer can increase the distance between molecules, improve the toughness of the adhesive layer and effectively improve the antistatic property of the protective film.

Description

technical field [0001] The invention relates to the technical field of films, in particular to a polyester film protective film. Background technique [0002] In the field of optical films, many functional coatings need to be coated on the surface of optical films to achieve certain application functions, such as coating antifouling layers, antiglare layers, antistatic layers, high fog layers, diffusion layers, etc. on the surface of optical films As well as optical components containing these functional coatings, a protective film will be attached to the surface during transportation or assembly of these optical functional films or optical components to prevent the surface from being polluted and scratched. When die-cutting optical components, it is easy to cause glue overflow or powder drop, which will affect the quality of the product. [0003] Although the prior art provides relevant technical solutions, such as Chinese patent CN110734711A discloses a patent for a press...

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Problems solved by technology

[0002] In the field of optical films, many functional coatings need to be coated on the surface of optical films to achieve certain application functions, such as coating antifouling layers, antiglare layers, antistatic layers, high fog layers, diffusion layers, etc. on the surface of optical films As well as optical components containing these functional coatings, a protective film will be attached to the surface during transportation or assembly of these optical functional films or optical components to prevent the surface from being polluted and scratched. When die-cutting optical components, it is easy to cause glue overflow or powder drop, which will affect the quality of the product

[0003] Although the prior art provides relevant technical solutions, such as Chinese patent CN110734711A discloses a patent for a pressure-sensitive adhesive for polarizer protective film and a preparation method thereof, the pressure-sensitive adhesive of the polarizer protective film consists of the following raw materials in parts by weight Prepared: 31-35 parts of soft monomer, 6-8 parts of functional monomer, 0.15-0.35 parts of initiator, 57-63 parts of solvent, 2-4 parts of curing agent, the prepared polarizer protective film, its system There is no hard monomer, and no internal cross-linking monomer to increase its cohesion. It is not enough to improve the cohesion only through curing agent cross-linking. During the die-cutting process, it is easy to produce powder drop

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