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Release film and preparation method thereof

A technology of release film and release layer, which is applied in coating and other directions, can solve the problems of increasing interference fringes and increasing costs, and achieve the effects of reducing cost, improving adhesion and durability, and good optical appearance

Active Publication Date: 2019-10-01
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prolong the life of the release film and improve the release effect of the release film, many manufacturers adopt the practice of thickening the silicone coating, which increases the cost and brings the risk of increased interference fringes

Method used

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  • Release film and preparation method thereof
  • Release film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0047] In the method for preparing the release film provided by the present invention, the processing of the intermediate layer and the release layer can be produced by a wet coating process. No special definition is made for painting methods. What is necessary is just to satisfy the film thickness specified by this invention.

[0048] In a preferred embodiment, the step of coating the material for the intermediate layer includes: mixing epoxy silane, unsaturated functional group silane and metal chelate in a proportion, and dissolving with an organic solvent, heating and stirring, to obtain the intermediate Layer coating materials.

[0049] In a preferred embodiment, the step of forming the intermediate layer includes: placing the intermediate layer coating material on one surface of the original film of the base material for knife coating, and drying at 80-120°C for 0.5-5 After minutes, the middle layer is obtained.

[0050] In a preferred embodiment, the step of forming a relea...

Embodiment 1

[0054] The intermediate layer material 3-(methacryloxy)propyltrimethoxysilane, 3-(2,3-glycidoxy)propyltrimethoxysilane and metal aluminum chelate BY24-846E are 40wt: 40%wt: 20%wt ratio is mixed, and diluted with organic solvent methyl ethyl ketone and ethyl acetate, dissolved, heated and stirred to obtain the intermediate layer coating material. On one surface of the PET substrate, the above-mentioned interlayer coating material was knife-coated using a wire bar, and dried at 100°C for 1 minute to obtain an interlayer film with a film thickness of 100 nanometers.

[0055] On the intermediate layer, the mixture of silicon-based release coating LTC750A and catalyst NC-25 was knife-coated with a wire rod and dried at 100°C for 1 minute to obtain a release film with a film thickness of 120 nanometers.

[0056] Experimental evaluation and results: The interference fringe test is under three-wavelength light, and the reflected light is used to visually evaluate the interference fringe. T...

Embodiment 2

[0059] The intermediate layer material 3-(methacryloxy)propyltrimethoxysilane, 3-(2,3-glycidoxy)propyltrimethoxysilane and metal aluminum chelate BY24-846E are 20% The mixture is mixed in a ratio of wt: 60% wt: 20% wt, diluted with organic solvent methyl ethyl ketone and ethyl acetate, dissolved, and heated and stirred to obtain an intermediate layer coating material. On one surface of the PET substrate, the above-mentioned interlayer coating material was knife-coated using a wire bar, and dried at 100°C for 1 minute to obtain an interlayer film with a film thickness of 25 nm.

[0060] On the intermediate layer, the mixture of silicon-based release coating LTC750A and catalyst NC-25 was knife-coated with a wire rod and dried at 100°C for 1 minute to obtain a release film with a thickness of 15 nm.

[0061] Experimental evaluation and results: The interference fringe test is under three-wavelength light, and the reflected light is used to visually evaluate the interference fringe. T...

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Abstract

The invention provides a release film and a preparation method thereof. The release film comprises a base material original film, an intermediate layer and a release layer which are sequentially stacked from bottom to top, wherein the intermediate layer is a resin coating formed by reaction on epoxy silane and unsaturated functional silane in an environment that a metal chelate exists. According to the release film provided by the invention, by adding the intermediate layer between the base material original film and the release layer and improving the adherence and durability of the release film by using the intermediate layer, the service life of a product is prolonged and the cost of the product is lowered as the release film has the characteristics of being good in optical appearance and convenient to monitor on a production line. Moreover, as the release film provided by the invention does not contain heavy metals, halogens and compounds thereof, the release film can be widely applied to protective films in medical or sanitary industry, so that the using range of the release film is expanded.

Description

Technical field [0001] The present invention relates to the technical field of thin films, in particular to a release film and a preparation method thereof. Background technique [0002] At present, the release films on the market are mostly used as protective films for semiconductor components, liquid crystal panels, plasma (Plasma Display Panel, PDP) and organic EL (Organic Electro-Luminescence: OEL or organic EL) and other display devices, or used It is used as a back sticker for self-adhesive, tape, analgesic ointment and rheumatism ointment to prevent the protective film of the above items or the above items from sticking together. The release film is usually composed of a silicon-based or fluorine-based release resin coated on one or both sides of the film substrate. [0003] In recent years, with the development of large-size and high-precision display equipment, the quality requirements of the release film have become higher and higher, which is mainly reflected in the nee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/06C08J7/04C09D4/02C09D7/63C09D4/00
Inventor 张国臻
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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