A kind of 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 polyethylene low-viscosity protective film with low unwinding force and a preparation method thereof. A low unwinding force polyethylene low-viscosity protective film is composed of three layers of surface layer, core layer and self-adhesive layer; the surface layer includes: polyethylene wax, silicone modified polyolefin, dendritic toughening agent, propylene-based elastomer, Polyethylene resin; core layer includes: POE, mLLDPE, LLDPE, LDPE, color masterbatch; self-adhesive layer includes: POE, SEBS, one or two kinds of hydrogenated C5 resin or hydrogenated C9 resin or hydrogenated C5-C9 copolymer resin. First, the viscous layer material is mixed evenly and then granulated, and then sent to a three-layer co-extrusion blown film machine with the uniformly mixed material of the surface layer and the core layer for co-extrusion. The production process is simple and easy. The invention solves the problem of large unwinding force of the existing polyethylene protective film, and is convenient for production enterprise users to 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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