High-temperature-resistance and unimpressed pressure sensitive adhesive (PSA) for polyethylene protective film, preparation method thereof and prepared polyethylene protective film

Abstract

The invention discloses a high-temperature-resistance and unimpressed pressure sensitive adhesive (PSA) for a polyethylene protective film, a preparation method thereof and a prepared polyethylene protective film. The high-temperature-resistance and unimpressed PSA for the polyethylene protective film is prepared from the following raw materials by a seeded emulsion polymerization method: a monomer group, an emulsifier, an initiator, a chain transfer agent, a PH regulator and deionized water, wherein the monomer group comprises the following components by weight percent: 80-90% of a soft monomer, 5-10% of hard monomer, and 5-10% of functional monomer. When the polyethylene protective film prepared from a PSA emulsion coated on a high-light metal sheet is removed at a high temperature, no imprint generates, so that the appearance of products is not influenced; compared with the existing production process, the preparation method provided by the invention has the advantages that the process route is optimized, the production is easy to control, the production cost is low, and the market prospect is wide.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesives, in particular to a water-based pressure-sensitive adhesive used for a polyethylene protective film and a polyethylene protective film prepared therefrom. Background technique [0002] The protective film is a film-like material that has a protective function for other materials. It is usually made of polyolefin plastic film or kraft paper, and rubber or acrylic resin is used as a pressure-sensitive adhesive. On the surface of protected materials such as metal sheets, plastic sheets, stone, wood, glass, etc., protect them from harmful gases and microorganisms during manufacturing, transportation, storage and processing, and prevent dust pollution and mechanical scratches. In the process of bending and stretching, it provides the lubricity of the material and the mold, and improves the processing workability. [0003] Metal sheets, especially high-gloss sheets, require that th...

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Problems solved by technology

[0003] Metal sheets, especially high-gloss sheets, require that the protective film can withstand high temperature environments, and after the protective film is removed from the sheet, no marks can be left on the sheet. This requires that the selected pressure-sensitive adhesive must have high cohesive strength and strong weather resistance. Features: Although solvent-based acrylic pressure-sensitive adhesives can meet the above requirements, a large amount of volatile organic gases are produced during the production process, which not only causes serious pollution to the environment, but also brings great harm to the health of production employees.

[0004] With the strengthening of environmental protection awareness, water-based pressure-sensitive adhesives have been developed rapidly, but the general water-based acrylic pressure-sensitive adhesive protective film is attached to metal plates, especially high-gloss plates. mark, affect the appearance of the product, and seriously lead to the scrapping of the board, causing huge losses