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UV-cured optical transparent film and preparation method thereof

An optically transparent and photoinitiator technology, which is applied in the direction of optics, optical components, and films/sheets without carriers, etc., can solve the problems of insufficient initial adhesion, insufficient light transmittance, and high melting point to meet the requirements of large-size lamination , powerful light-gathering and light-transmitting functions, and high bonding yield

Inactive Publication Date: 2020-01-03
TONGGUANG JIANGSU INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 103820042A mentions a heat-cured and UV-cured optically transparent hot-melt adhesive film, which uses butadiene rubber, styrene-butadiene rubber, EPDM rubber, silicone rubber, etc., which have insufficient light transmittance and are compatible with reactive diluents bad sex
Although TPU has certain compatibility with reactive diluents, it is still insufficient, and the initial bonding force is insufficient, and the melting point is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] UV curable optically clear thermoplastic butyl acrylate elastomer film, 0.05mm thick

[0024] Take 90 parts by weight of polybutyl acrylate elastomer with a hardness of 10A, add 9 parts by weight of propoxylated glycerin triacrylate, 1 part by weight of photoinitiator 819, mix uniformly through a mixer, and extrude through a plasticizing machine at 70 ° C. out of the film.

Embodiment 2

[0026] UV-cured optically transparent thermoplastic polyacrylamide elastomer film, with a thickness of 0.05mm, takes 80 parts by weight of polyacrylamide elastomer with a hardness of 50A, adds 15 parts by weight of methoxytripropylene glycol monoacrylate, and 5 parts by weight of photoinitiated The agent TPO-L is mixed evenly through a mixer, and extruded into a film through a plasticizer at 80°C.

Embodiment 3

[0028] 85 parts by weight of polymethacrylic acid elastomer with a hardness of 90A, 14 parts by weight of pentaerythritol acrylate, and 1 part by weight of photoinitiator ITX were uniformly mixed through a mixer, and extruded through a plasticizer at 80°C to form a film.

[0029] The thickness of the UV curable optically transparent film of the present invention is preferably 0.01mm-0.07mm. When laminating, place the cut film between two touch screen panels (one cover glass, one sensor glass), install a vacuum fixture, vacuumize, heat, raise the temperature to 90°C, take it out, and place the touch screen Take it out from the fixture, and cure it in a high-temperature curing oven. There are no bubbles and glue overflow by visual inspection.

[0030] The test results show that the light transmittance of the laminated product is equivalent to that of the cover glass and the sensing glass.

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Abstract

The invention discloses an UV-cured optical transparent film. The UV-cured optical transparent film is prepared from the following raw materials in parts by weight: 55 to 95 parts of polyacrylate elastomer, 0 to 20 parts of an acrylate reactive diluent and 0 to 5 parts of a photoinitiator. The UV-cured acrylate elastic optical transparent adhesive film is a solid adhesive film at normal temperature, has fluidity in a heated state, forms stable filling at normal temperature, makes a major breakthrough to traditional acrylic optical adhesives, can meet the requirements of large-size lamination,and is high in lamination yield.

Description

technical field [0001] The invention belongs to the field of photoelectric technology, specifically relates to the field of optical film technology, in particular to a UV curing optically transparent hot-melt adhesive film and a preparation method thereof. Background technique [0002] In recent years, the electronics industry has developed rapidly, among which touch screens and liquid crystal displays are more and more widely used. The touch screen is mainly composed of 3 layers of materials, and these 3 layers of materials are mainly bonded by OCA and LOCA as optical adhesives. OCA optical adhesive is a kind of optically transparent double-sided adhesive tape without substrate. The technology application is relatively mature, especially suitable for small size lamination, but its lamination is difficult, requires high precision, lamination is easy to produce air bubbles, and cannot be reworked. Components can only be disposed of as defective products, especially for some l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/06C08F265/10C08F255/02C08F222/20C08F220/28C08F222/14C08F2/48C09J151/00C09J7/10G02B1/10
CPCC08F2/48C08F255/026C08F265/06C08F265/10C09J151/003C09J2203/318C09J7/10C09J2301/304G02B1/10
Inventor 陈重光郑青恩王大保
Owner TONGGUANG JIANGSU INFORMATION TECH CO LTD