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Easy-to-adhere film and method for manufacturing the same, a polarizing plate, and an image display device

一种制造方法、薄膜的技术，应用在化学仪器和方法、光学、偏振元件等方向，能够解决显示特性降低、条纹状不均等问题，达到粘接性优异、不易粘连、不易光学坏点的效果

Active Publication Date: 2020-11-06
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problem has also been newly discovered: when a polarizing plate using the easy-adhesive film disclosed in Patent Document 1 is exposed to a high-humidity environment for a long time as a polarizing plate protective film, streak-like unevenness occurs, which leads to poor display characteristics. reduce

Method used

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  • Easy-to-adhere film and method for manufacturing the same, a polarizing plate, and an image display device
  • Easy-to-adhere film and method for manufacturing the same, a polarizing plate, and an image display device
  • Easy-to-adhere film and method for manufacturing the same, a polarizing plate, and an image display device

Examples

Experimental program
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Effect test

Embodiment 1

[0143] An easy-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, pellets of the same imidized MS resin (glass transition temperature: 120° C.) used in the production of “transparent protective film 1A” described in JP-A-2017-26939 Example were used. material. An acrylic resin was melt-extruded from a T-die to form a film with a thickness of 160 μm, and one side of the film was coated with the above-mentioned easy-adhesive composition with a wet thickness of about 9 μm by a gravure coater. In this case, an acrylic film with a thickness of 40 μm is provided with an easy-adhesive layer with a thickness of 50 nm on one side of the acrylic film by stretching to 2 times each in the longitudinal direction (MD) and the width direction (TD) by a simultaneous biaxial stretching tenter. Easy to bond film.

Embodiment 2～4 and comparative example 1、2

[0145] Except having changed the coating thickness of the easily bonding composition, it carried out similarly to Example 1, and obtained the easily bonding film. Table 2 shows the thickness (after stretching) of the easily bonding layer.

Embodiment 5、6 and comparative example 3～5

[0147] The furnace temperature (stretching temperature) at the time of tenter stretching was changed as shown in Table 2. Except having changed stretching temperature, it carried out similarly to Example 1, and obtained the easily-adhesive film.

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Abstract

The invention provides an easy-to-adhere film, and a method for manufacturing the same, a polarizing plate, and an image display device. The easy-to-adhere film (1) is provided with an easy-to-adherelayer (15) on the surface of a transparent film substrate (11). The easy-to-adhere layer (15) contains a binder resin and inorganic fine particles having an average primary particle diameter of 10-100nm. The content of the basic component in the easy-to-adhere layer (15) is 5-75 ppm. An easy-to-adhere layer can be formed by applying an easy-to-adhere composition containing a binder resin or a precursor thereof, inorganic fine particles, an alkaline component, and a solvent to a transparent film substrate and heating the composition.

Description

[0001] This application is a divisional application of an application with an application date of July 25, 2019, an application number of 201910676161.5, and an invention title of "Easy-adhesive film and its manufacturing method, polarizing plate and image display device". technical field [0002] 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 [0003] 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 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/00G02B5/30G02B1/14
CPCB32B27/08B32B27/308B32B27/306B32B27/00G02B5/30G02B1/14
Inventor 品川雅道下空冈田康彰徐菁璠
Owner NITTO DENKO CORP
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