Preparation of environment-friendly water-soluble protective film

Abstract

The invention discloses an environment-friendly water-soluble protective film, and belongs to the technical field of protective films. The protective film comprises the following components in parts by mass: 15-30 parts of polyvinyl alcohol, 1-5 parts of methyl silicone oil, 0.2-3 parts of a plasticizer, 0.1-3 parts of an antioxidant, 2-10 parts of an emulsifier, 0.2-5 parts of a thickening agent, 0.1-2 parts of a water-based quick-drying agent, 1-5 parts of a defoaming agent, 0.4-4 parts of span 60 and 30-80 parts of water. According to the invention, aiming at the problems of low protection efficiency, high cost, difficulty in stripping, generation of solid wastes and the like of traditional shielding paper and protective films, water is selected as a solvent, polyvinyl alcohol is selected as a protective film base material, additives such as an antioxidant, a plasticizer, an emulsifier, a thickener, a water-based quick-drying agent, a defoaming agent, span-60 and the like are used as auxiliary materials, mixing is carried out in a mechanical stirring manner, and the protective film is coated on the surfaces of protected materials such as workshop walls, equipment, pipelines and the like in a brush coating or spray coating manner, can be peeled off from the surfaces after protection is completed, can also be quickly cleaned with cold water, and has no residue on the surfaces after cleaning.

Description

technical field [0001] The invention belongs to the technical field of protective films, and in particular relates to an environment-friendly water-soluble protective film. Background technique [0002] In recent years, with the rapid development of society and the continuous improvement of economic level, people have higher and higher requirements for materials, especially in the field of protective film. The traditional protective film is generally polyethylene protective film, but polyethylene film is not easy to peel off. , Not easy to degrade, easy to generate solid waste and other problems, especially "white plastic pollution" has long been a serious pollution to the environment. [0003] At present, in developed countries such as Europe, America and Japan with mature industrial technology, there are more and more researches on green and novel high-performance protective materials. However, ordinary solvent-based coating films are generally organic solvent-based, which...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing problems of traditional masking paper, protective film with low protection efficiency, high cost, difficult peeling, and solid waste generation, water is selected as the solvent, polyvinyl alcohol is used as the base material of the protective film, and antioxidants, plasticizers are supplemented Additives such as additives, emulsifiers, thickeners, water-based quick-drying agents, defoamers, and Span 60. After large-scale protective construction, a uniform, continuous and transparent layer will be formed after drying. The materials used for the prepared protective film are environmentally friendly and clean. Through biodegradation, it penetrates into the soil to increase the viscosity, air permeability and water retention, and is especially suitable for soil improvement. The invention discloses its specific preparation method

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