Low-unwinding-force polyethylene low-viscosity protective film and preparation method thereof

Abstract

The invention relates to the technical field of polymer plastic films, in particular to a low-unwinding-force polyethylene low-viscosity protective film and a preparation method thereof. The low-unwinding-force polyethylene low-viscosity protective film is composed of a surface layer, a core layer and a self-adhesive layer, the surface layer comprises polyethylene wax, organic silicon modified polyolefin, a dendritic toughening agent, a propenyl elastomer and polyethylene resin; wherein the core layer comprises POE, mLLDPE, LLDPE, LDPE and color masterbatch; and the self-adhesive layer comprises one or two of POE, SEBS, hydrogenated C5 resin or hydrogenated C9 resin or hydrogenated C5-C9 copolymer resin. The method comprises the following steps: uniformly mixing the adhesive layer materials, granulating, and sending the granules and the uniformly mixed materials of the surface layer and the core layer to a three-layer co-extrusion film blowing machine for co-extrusion so that the production process is simple and feasible. The problem that an existing polyethylene protective film is large in unwinding force is solved, and production type enterprise users can conveniently use the protective film for processing and production.

Description

technical field [0001] The invention relates to the technical field of polymer plastic films, in particular to a polyethylene low-viscosity protective film with low unwinding force and a preparation method thereof. Background technique [0002] Polymer protective film is a film with pressure-sensitive adhesive on one side. Its products are in the form of a reel. The pressure-sensitive adhesive of the film is in close contact with the back of the film. When the protective film is opened from the reel , Since the pressure-sensitive adhesive of the protective film is closely connected with the back of the film and has strong tension, it requires a certain force to separate it. This separation force is called unwinding force. [0003] If the unwinding force of the protective film is too high, when the user is using the protective film to stick the film, the protective film will be deformed when unwinding or the protective film will be uneven after sticking, which will seriously ...

AI Technical Summary

Problems solved by technology

However, for protective films with adhesive layers, these small molecular compounds are not suitable as anti-adhesive agents to reduce the unwinding force, because when the surface layer is in contact with the adhesive layer, due to the action of the adhesive, these small molecular compounds in the surface layer It is easy to free out and enter the adhesive layer, which greatly reduces the adhesive force of the adhesive layer or even fails

If organic silicon and other substances are used, because they cannot be integrated into the polyethylene protective film, solvents can only be used to coat the surface of the protective film, which will increase two processes, which is time-consuming and laborious and greatly increases the cost.

These solvents are prone to residue or erosion after contacting the products that have been filmed, causing unnecessary trouble and increasing the difficulty of processing and production

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