Low-temperature cured ultra-light PET release film and preparation method thereof

Abstract

The invention discloses a low-temperature cured ultra-light PET release film comprising the following components in parts by mass: 3-8 parts of 120 # solvent oil, 3-8 parts of D30 solvent oil, 5 to 12parts of ethyl acetate, 0.5 to 1.5 parts of isopropanol, 0.8 to 1.5 parts of Shin-Etsu KS-3755 silicone oil main agent, 0.001 to 0.002 part of silicon dioxide, 0.002 to 0.005 part of polyoxysilane and 0.001 to 0.0015 part of an organic platinum compound. A preparation method comprises the following process: 1) preparing a coating; 2) treating an original film; 3) carrying out precision coating; 4) drying and curing; and 5) carrying out material receiving and coiling. According to the low-temperature cured ultra-light PET release film prepared through the method, the curing temperature does not exceed 130 DEG C, and the release force is 5 g / in in 20 min; under one hundred times of the magnifying lens, no visible particles or foreign matters exist, the film surface is smooth, no longitudinal lines, water ripples, transverse lines or obvious rainbow lines exist, the 24-hour normal-temperature release force and the aging release force are close to 20 min release force, and the residual adhesion rate is larger than or equal to 75%.

Description

technical field [0001] The invention relates to the technical field of release films, in particular to a low-temperature curing ultra-light PET release film and a preparation method thereof. Background technique [0002] Release film, also known as peeling film, isolation film, separation film. Usually, in order to increase the release force of the plastic film, the plastic film will be corona treated, or fluorine-coated, or coated with silicon (silicone) release agent on the surface of the film material, such as PET, PE, OPP, etc. 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). Because the release film has the advantages of isolation, protection, and easy peeling, it is widely used in various fields such as electronics, communications, and machinery. [0003] Silicon-based release film is a screen protective film mainly...

AI Technical Summary

Problems solved by technology

[0004] The existing ultra-light release film generally has a curing temperature exceeding 145°C. If the curing temperature is too high, a thermal deformation phenomenon will occur on the PET release film, which is the so-called thermal wrinkle, tension line, etc. The existence of thermal wrinkle and tension line will cause It will cause local uneven coating and affect the normal use of customers, and the reduction of curing temperature can solve this problem well