Electron beam curing self-adhesive release paper and manufacturing method thereof

Abstract

The invention discloses an electron beam cured self-adhesive release paper and a manufacturing method thereof, which is characterized in that it includes base paper and a release agent layer, wherein the release agent layer is processed by a five-roller coating process and an electron beam curing method , without the use of coating, directly coating a layer of electron beam curing release agent composed of silicone-modified polyurethane acrylate, silicone-modified polyacrylate and reactive diluent on the surface of the paper. The residual adhesion of the self-adhesive release paper provided by the invention can reach 99%, the silicon transfer rate can be kept within 1%, and the difference between the aging peeling force and the conventional peeling force is within 5 gf / 25mm. And the release agent coating has the advantages of high temperature resistance, solvent resistance, oil resistance, no small molecule migration, and can meet the contact of food and skin.

Description

technical field [0001] The invention relates to a method for making self-adhesive release paper by means of electron beam curing, and belongs to the field of self-adhesive release paper preparation. Background technique [0002] Release paper, also known as anti-adhesive paper, release paper. It is a kind of anti-adhesive paper that prevents the prepreg from sticking and protects the prepreg from contamination. With the development of science and technology, self-adhesives are more and more widely used in various industries, such as common electronic labels, electrical labels, food contact labels, skin contact labels, tire labels and so on. This puts forward stricter requirements for the release paper materials it needs, such as high residual adhesion, low silicon migration, high aging resistance, high temperature resistance, solvent resistance, oil resistance, no small molecule migration, Meet food, skin contact requirements, etc. [0003] At present, the curing methods ...

AI Technical Summary

Problems solved by technology

[0004] Traditional thermosetting coating materials have the following disadvantages: 1. In order to ensure the required peeling performance, it is necessary to require a high wet coating amount, and it needs to be dried and cured at high temperature, and the energy consumption is high

At present, there are also production of release paper without coating, but its peeling force stability deviation, high temperature resistance, aging resistance performance deviation, residual adhesion is generally around 80% traditional heat curing method

3. The traditional thermal curing process requires a certain amount of heat to completely volatilize the solvent to ensure that the coating is completely cured. The speed cannot be fast and the efficiency is very low.

4. There will be a large amount of solvent volatilization and emission. With the increase of environmental protection, it is bound to face elimination

[0005] Traditional UV-curable coating materials have the following disadvantages: 1. Photoinitiators need to be used, and small molecule photoinitiators have the risk of migration; 2. UV-curing requires a certain amount of time to irradiate the coating to ensure that the coating is completely cured, and the vehicle speed is slow and efficient Low

3. The UV lamp ages faster over time, and the curing power gradually decreases, so its quality stability deviates

4. UV curable coating has poor UV resistance and aging resistance

At the same time, because the coated release paper currently used cannot be recycled and reused, it is bound to face elimination in the future.