A kind of peelable protective film and its composition formula

Abstract

The invention provides a strippable protective film which is excellent in adhesive performance and does not have peeling problem, and is applicable to temporary protection of articles. In particular, the stripping strength of the protective film is between 35g / cm and 100g / cm, so that the protective film can be easily stripped when being stripped from an article, and residual adhesive cannot be left on an adhered article. The protective film is prepared from a composition in a specific formula, the TI value of the composition is between 2.00 and 2.20, and the composition comprises a vinyl chloride-vinyl acetate copolymer, high and low molecular weight polyvinyl chloride emulsified polymer powder, a trimellitate plasticizer, a diisobutyrate mixed plasticizer, a phenol-free calcium-zinc stabilizing agent, smoked silica, aluminum hydroxide, barium sulfate and calcium carbonate.

Description

technical field [0001] The invention relates to a peelable protective film and its composition formulation, especially to a peelable protective film and its composition formulation which can be easily peeled off without leaving glue residue after an intermediate process. Background technique [0002] In the prior art, the peelable protective film is a film product with both adhesive and dustproof and scratchproof functions, which is often used to temporarily protect the appearance of objects, or in the intermediate processing of electronic components or optical components Or during the storage period, it is used to temporarily bond and protect the processed or stored electronic components or optical components (hereinafter referred to as the glued object), and the protective film can be easily removed from the The glued object is torn apart without hurting the glued object. [0003] However, the peelable protective film in the prior art, such as a protective film of an acry...

AI Technical Summary

Problems solved by technology

[0003] However, the peelable protective film in the prior art, such as a protective film of an acrylic copolymer disclosed in U.S. Patent No. 6,211,282, will peel off under high-pressure water washing when it is bonded or attached to the object to be glued. Problem, moreover, in the process of tearing off the protective film from the object to be glued, the adhesive components of the protective film often form an adhesive layer that is not easy to remove (hereinafter referred to as residual glue) and adhere to the surface of the object to be glued, resulting in time-consuming It is difficult to remove the defect of residual glue, so there is still room for improvement in the peelable protective film in the prior art

[0004] In addition, the peelable protective film in the prior art requires the use of solvents and cross-linking and hardening during the manufacturing process, so that there is an environmental problem of waste solvents, especially the peelable protective film cannot be used after being torn off. Recycling and reuse requires disposal as waste, which has no environmental protection significance

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