Membrane surface treatment method and device

A processing method and technology for the surface of the film, which can be applied in the directions of spraying devices, liquid spraying devices, instruments, etc., and can solve the problems of poor adhesion of TAC films.

Active Publication Date: 2016-03-02
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesion of PVA film to the above adhesives is good, but the adhesion of TAC film is not good

Method used

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  • Membrane surface treatment method and device
  • Membrane surface treatment method and device
  • Membrane surface treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Examples are described, but the present invention is not limited to the following examples.

[0124] The surface treatment of the film 9 was performed using the film surface treatment apparatus 1 shown in FIG. 1 .

[0125] The dimensional structure of the device 1 is as follows.

[0126] Axial length in the processing width direction of the rollers 31, 32: 390mm

[0127] Diameter of rollers 31, 32: 320mm

[0128] Blowout width in the treatment width direction of nozzles 14, 24: 300mm

[0129] The circumference of the arc direction of the first processing space 93: 275mm

[0130]Thickness of the first processing space 93: 5mm

[0131] Thickness of the narrowest part of the discharge gap 39: 1mm

[0132] As the film 9 to be processed, a TAC film was used. The width of the TAC film 9 is 325 mm.

[0133] The conveying speed of the TAC film 9 was 2.5 m / min.

[0134] The temperature of the rollers 31 and 32 and the temperature of the TAC film 9 were set to 35°C.

[0...

Embodiment 2

[0156] In Example 2, in the apparatus 1 of FIG. 1 , the flow rate of each component of the first gas in the first treatment step is as follows.

[0157] Carrier gas (N 2 )30slm

[0158] Acrylic acid 3g / min

[0159] Allyl methacrylate 0.3g / min

[0160] Therefore, the content rate of the allyl methacrylate in the 1st gas with respect to acrylic acid was 10 wt%. Other processing conditions were the same as in Example 1. The preparation procedure of the surface-treated polarizing plate sample, and the contents of the adhesive strength evaluation and the hot water resistance evaluation were also the same as in Example 1. As a result of the adhesive strength evaluation, adhesive strength=8.8 N / inch. As a result of the hot water resistance evaluation, color leakage width=0.89 mm. Peeling was not confirmed between the treated TAC film 9 and the PVA film. Therefore, both adhesive strength and hot water resistance are favorable.

Embodiment 3

[0162] In Example 3, in the apparatus 1 of FIG. 1 , the flow rate of each component of the first gas in the first treatment step is as follows.

[0163] Carrier gas (N 2 )30slm

[0164] Acrylic acid 3g / min

[0165] Allyl methacrylate 0.03g / min

[0166] Therefore, the content rate of the allyl methacrylate in the 1st gas with respect to acrylic acid was 1 wt%. Other processing conditions were the same as in Example 1. The preparation procedure of the surface-treated polarizing plate sample, and the contents of the adhesive strength evaluation and the hot water resistance evaluation were also the same as in Example 1. As a result of the adhesive strength evaluation, adhesive strength=9.2 N / inch. As a result of the hot water resistance evaluation, color leakage width=0.95 mm. Peeling was not confirmed between the treated TAC film 9 and the PVA film. Therefore, both adhesive strength and hot water resistance are favorable.

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Abstract

The present invention improves the hot water resistance of a film laminate such as a polarizing plate formed by bonding while improving the adhesiveness of a film to be treated made of a resin used for a protective film of a polarizing plate. In the first treatment part (91), the first gas containing a polymerizable monomer and a crosslinkable additive component is brought into contact with the film to be treated (9) (first treatment step). After the first processing step or in parallel with the first processing step, a discharge-generated gas such as nitrogen gas is made into a plasma and brought into contact with the film to be processed (9) (second processing step). The content rate of the crosslinkable additive component to the polymerizable monomer is set within a predetermined range, and the content rate is preferably set at 0.5 wt % to 10 wt %. The above-mentioned crosslinkable additive component is preferably a diallyl compound, an alkyne compound, or a silicon alkoxide compound. Oxygen gas of 0.5 vol% or less may be added to the above discharge generated gas.

Description

technical field [0001] The present invention relates to a method and apparatus for surface treatment of a resin film, and particularly to a film surface treatment suitable for improving not only the adhesiveness of the film but also the hot water resistance of a film laminate formed by bonding Methods and devices. Background technique [0002] For example, a polarizing plate is mounted on a liquid crystal display device. The polarizing plate is a film laminated body in which a polarizing film and a protective film are laminated. Generally, a polarizing film is composed of a resin film (hereinafter referred to as "PVA film") containing polyvinyl alcohol (PVA) as a main component. The protective film is composed of a resin film (hereinafter referred to as "TAC film") containing triacetyl cellulose (TAC) as a main component. As an adhesive for bonding these films together, water-based adhesives such as polyvinyl alcohol-based and polyether-based adhesives are used. The adhe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18C08J7/00C08J7/04G02B5/30C08J7/043
CPCG02B1/105C08J7/18C08J7/042G02B1/14C08J7/043C08J7/0427C08J5/18B05B7/00G02B5/30
Inventor 村上淳之介中野良宪长谷川平
Owner SEKISUI CHEM CO LTD
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