Amorphous PET release film as silica gel roll protective film and production technology of amorphous PET release film

Abstract

The invention discloses an amorphous PET release film as a silica gel roll protective film and a production technology of the amorphous PET release film. The amorphous PET release film comprises a PETbasic film, and a functional coating layer is arranged on one surface of the PET basic film; the functional coating layer comprises, by weight, 3-8 parts of solvent naphtha D120, 3-8 parts of solventnaphtha D30, 4-8 parts of butanone, 0.5-2 parts of isopropanol, 0.05-0.2 part of amorphous release agent, 0.18-0.45 part of methylbenzene, 0.2-0.6 part of heavy stripping additive, 0.05-0.09 part ofcrosslinking agent, 0.01 part of anchoring agent and 0.02 part of catalyst. The light transmittance of the produced amorphous PET release film is above 90%, the haze is below 3.0, and under normal temperature, release force stability is 150 g+ / -20 g; through one hundred times of magnification of a magnifying lens, no visible particles or foreign matter exists, the surface of the film is flat and free of longitudinal grains, water ripples, transverse grains and obvious rainbow grains, the ageing stability is smaller than 250 g, and the residual adhesive power is larger than 85%.

Description

technical field [0001] The invention belongs to the technical field of silica gel protective film production, in particular to a non-silicon PET release film used as a silica gel roller protective film and a production process for the non-silicon PET release film used as a silica gel roller protective film. Background technique [0002] Silicone roller is a roll-shaped product made of metal or other materials as the core and covered with silicone rubber after vulcanization. Various types of silica gel form different microporous structures due to different manufacturing methods. Its special chemical composition And its physical structure determines that it has many characteristics that other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc. Silica gel is divided into macroporous silica gel according to its pore size: macroporous silica gel , Coarse-pore silica gel, B-type...

AI Technical Summary

Problems solved by technology

Ordinary PET release film contains a large amount of silicon elements on the surface of the film due to the coating of silicone oil on the surface. Directly using ordinary PET release film as the protective film of the silicone roller will cause the silicon element on the protective film to migrate and destroy the physical and chemical properties of the silicone roller. performance

Therefore, it should be because the PET release film of the silicone protective film must be coated with a non-silicon release agent. At present, most of the PET release films are coated with silicone oil as a release agent. The technology of PET release film produced by coating with additives is not mature. At present, the non-silicon PET release film with superior product performance is basically monopolized by foreign companies.

Images