High-viscosity self-adhesive protection film and preparation method thereof

Abstract

The invention discloses a high-viscosity self-adhesive protection film and a preparation method thereof. The high-viscosity self-adhesive protection film successively comprises a self-adhesive layer, a middle layer and an anti-stick back layer from top to bottom, and the anti-stick back layer is an anti-stick back layer added with an anti-stick master batch. In the high-viscosity self-adhesive protection film, the viscosity of the self-adhesive layer is high, and the anti-sticking back layer effectively prevents the self-adhesive layer from being bonded with the back layer when reeling is performed and facilitates unreeling, wherein the self-adhesive layer is prepared from modified SEBS and linear low-density polyethylene. The middle layer is prepared from linear low-density polyethylene and low-density polyethylene. The anti-stick back layer is prepared by selecting linear low-density polyethylene, low-density polyethylene and the anti-stick master batch. The added anti-stick master batch prevents the self-adhesive layer from being bonded with the back layer when reeling is performed, facilitates unreeling, and also guarantees that the self-adhesive film does not deform. The high-viscosity self-adhesive protection film does not need additional gluing and is easy to unreel, and during production, the film does not adhere to a roller and does not generate wrinkles or foams.

Description

technical field [0001] The invention belongs to the field of co-extruded self-adhesive films, in particular to a high-viscosity self-adhesive protective film and a preparation method thereof. Background technique [0002] The protective film can be divided into adhesive film and self-adhesive film according to its nature. Self-adhesive film is the abbreviation of self-adhesive protective film, which is used to protect the fragile plastic film on the surface. Compared with adhesive film, self-adhesive film has more advantages. If there is no residual glue, stable adhesion, low cost and high profit, self-adhesive film has become the mainstream of the market in recent years. According to the size of the self-adhesive film, the viscosity ranges from 0.45N / 25mm (25°C) to 1.5N / 25mm (25°C) to 3.6N / 25mm (25°C) into low-viscosity, high-viscosity, and extra-high-viscosity self-adhesive films. [0003] Self-adhesive films are generally produced by co-extrusion. In the field of co-extr...

AI Technical Summary

Problems solved by technology

At present, there are some problems with high-viscosity products on the market, such as difficult unwinding, poor unwinding force, and bubbles, etc. During the production process, the viscous layer will also appear sticky rolls, wrinkles, and blisters when rewinding.

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