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Easily adhesive film, method for producing same, polarizing plate, and image display device

A manufacturing method and thin film technology, which is applied in the field of image display devices, can solve the problems of low adhesion, and achieve the effect of not easy to stick and not easy to optical defects

Pending Publication Date: 2022-03-18
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] On the other hand, films made of resin materials such as acrylic, polyester, polycarbonate, and cyclic polyolefin tend to have lower adhesion to PVA-based polarizers than cellulose-based films.

Method used

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  • Easily adhesive film, method for producing same, polarizing plate, and image display device
  • Easily adhesive film, method for producing same, polarizing plate, and image display device
  • Easily adhesive film, method for producing same, polarizing plate, and image display device

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Experimental program
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Effect test

Embodiment 1

[0150] An easily-adhesive film was produced using a film production device equipped with a melt extrusion film forming device, a gravure coater, a tenter-type simultaneous biaxial stretching device, and a winding device. As the acrylic resin, the same imidized MS resin (glass transition temperature: 120°C) as that used in the preparation of "transparent protective film 1A" described in the example of JP-A-2017-26939 was used of pellets. The acrylic resin was melt-extruded from a T-die and formed into a film with a thickness of 160 μm. Using a gravure coater, one side of the film was coated with the above-mentioned easy-adhesive composition C at a wet thickness of about 9 μm. In a heating furnace, use a simultaneous bidirectional stretching tenter to stretch to 2 times along the length direction (MD) and width direction (TD), respectively, to obtain an acrylic film with a thickness of 40 μm on one side of the acrylic film with a thickness of 200 nm. Easy-to-adhesive film for b...

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Abstract

A highly adhesive film (1) is provided with a highly adhesive layer (15) on the surface of a transparent film substrate (11). The easily adhesive layer (15) contains a binder resin and fine particles. The thickness of the easy-to-adhere layer is preferably 120-260 nm, and the average primary particle diameter of the fine particles is preferably 0.1-0.9 times the thickness of the easy-to-adhere layer. The highly adhesive layer can be formed by applying and heating a highly adhesive composition containing a binder resin or a precursor substance thereof, fine particles, an alkali component, and a solvent on a transparent film substrate.

Description

technical field [0001] The present invention relates to an easily-adhesive film having an easily-adhesive layer on the surface of a transparent film substrate and a method for producing the same. Furthermore, this invention relates to the polarizing plate which bonded the easily-adhesive film to the surface of a polarizing plate, and the image display apparatus provided with this polarizing plate. Background technique [0002] Liquid crystal display devices and organic EL display devices are widely used as various image display devices such as mobile devices, car navigation devices, monitors for personal computers, and televisions. In view of its display principle, a liquid crystal display device has a polarizing plate disposed on the surface of a liquid crystal cell on a viewing side. In a transmissive liquid crystal display device, polarizing plates are arranged on both surfaces of a liquid crystal cell. In an organic EL display device, in order to prevent external light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14G02F1/1335H01L27/32C09J7/50C09J7/24
CPCG02B5/305G02B1/14G02F1/133528C09J7/50C09J7/24C09J2301/122C09J2203/326C09J2433/006H10K59/8791B32B7/023B32B27/18B32B27/30B32B27/40C09D5/00C09D7/61C09D175/04C09D201/00G02B5/30H05B33/02B32B2307/42B32B2309/105B32B2457/20
Inventor 道下空品川雅糸永果令近野洋
Owner NITTO DENKO CORP
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