OPP release film

Abstract

The present invention provides an OPP release film, wherein the thin film layer comprises the following components: OPP, OPP weathering resistance masterbatch, nanometer silica, 3-aminopropyltriethoxysilane, butyl acrylate, methyl methacrylate 15, octadecyl methylacrylate, polyethylene glycol, ethanol, deionized water, natural latex, a defoamer and a thickening agent, the release layer comprises the following components: an aqueous polyvinyl acetate emulsion, an aqueous polyurethane emulsion, an aqueous modified polyvinyl alcohol solution, natural latex, 3-aminopropyltriethoxysilane, a defoamer and a thickening agent, and the aqueous modified polyvinyl alcohol solution comprises polyvinyl alcohol, deionized water, and modified calcium carbonate. The release film of the present invention has characteristics of good peel strength, good mechanical property, and good weather resistance, and is the release film having the good comprehensive performance.

Description

technical field [0001] The invention relates to a release film, in particular to an OPP release film. Background technique [0002] Release film, also known as peeling film, isolation film, separation film, barrier film, release film, film, plastic film, hole masking film, silicone oil film, silicone oil paper, anti-adhesive film, slip film, Tianna paper, release film Paper, silliconfilm, release film, release. Usually, in order to increase the release force of the plastic film, the plastic film will be treated with plasma, or coated with fluorine, or coated with silicon (silicone) release agent on the surface of the film material, such as PET, PE, OPP, OPP, etc.; it can show extremely light and stable release force for various organic pressure-sensitive adhesives (such as hot-melt adhesives, acrylic adhesives and rubber-based pressure-sensitive adhesives). [0003] Because the release film has the advantages of isolation, filling, protection, and easy peeling, it is widel...

AI Technical Summary

Problems solved by technology

Although OPP has many advantages, due to the properties of its material PP itself, the weather resistance of OPP film is poor, and it is more likely to age under the action of external environments such as light, heat, and oxygen, which affects its scope of use.

At the same time, because the polarity of the OPP film is very small, in order to cater to the OPP properties of the film layer, the polarity of the release layer should also be small. However, the preparation of the release layer inevitably requires the use of solvents. Solvents with less polarity are usually some aromatic organic solvents, which pollute the environment more. If environmental pollution is to be avoided, water-based release agents should usually be used. Water is more polar. Therefore, it is necessary to develop a A water-based release layer with less polarity, so that the affinity between the release layer and the film layer is better, so as to ensure the peel strength of the release film