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Polarizing plate and photocurable adhesive for forming polarizing plate

A light-curable, polarizing plate technology, applied in the direction of non-polymer organic compound adhesives, adhesives, adhesive types, etc.

Active Publication Date: 2014-08-13
TOYO INK SC HOLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology requires further improvement in press workability

Method used

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  • Polarizing plate and photocurable adhesive for forming polarizing plate
  • Polarizing plate and photocurable adhesive for forming polarizing plate
  • Polarizing plate and photocurable adhesive for forming polarizing plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] The UV absorber-containing acrylic film manufactured by Mitsubishi Rayon Co., Ltd.: HBD-002 (50 μm) was used as the protective film 1, and the UV absorber-free cycloolefin film ZEONOR film "ZF-14" manufactured by Nippon Zeon Co., Ltd. was used. ” (100μm) as protective film 5, on their respective surfaces, at 300W·min / m 2 The amount of discharge, corona treatment. Within 1 hour after the surface treatment, use the ring bar coater #3 to coat the photopolymerizable composition shown in Table 1 on the protective films 1 and 5, respectively, to form curable adhesive layers 2', 4', The above-mentioned PVA polarizer is sandwiched between the curable adhesive layers 2' and 4' to obtain a protective film 1 / curable adhesive layer 2' / PVA-based polarizer 3 / curable adhesive. A laminate composed of layer 4' / protective film 5.

[0134] The periphery of the laminated body was fixed with cellophane tape so that the protective film 1 was in contact with the tin plate and fixed on the t...

Embodiment 2～8、 comparative example 1～7

[0137] Except having changed the photocurable polymer composition as shown in Table 1 and Table 2, it carried out similarly to Example 1, produced the polarizing plate, and evaluated the performance by the method mentioned later.

Embodiment 9 and 10

[0139] In addition to replacing the protective film 1 in Example 9 with a cellulose triacetate film containing an ultraviolet absorber manufactured by Fujifilm Co., Ltd.: trade name "FujiTac" (80 μm), the protective film 1 in Example 10 A polarizing plate was obtained in the same manner as in Example 3 except that the cycloolefin film ZEONOR film "ZF-14" (100 μm) containing no ultraviolet absorber manufactured by Nippon Zeon Co., Ltd. was used, and the same evaluation was performed.

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Abstract

The present invention provides a polarizing plate, which is a polarizing plate in which both sides of a polyvinyl alcohol-based polarizer are covered with a protective film via an adhesive layer, and the adhesive layer contains 60 to 99.8% by mass of Compound (a), 0.02-40% by mass of cationic polymerizable compound (c) having cationic polymerizable functional group and no (meth)acryloyl group, photoradical polymerization initiator (d) and photocationic polymerization initiator ( The photocurable adhesive of e) is cured.

Description

technical field [0001] The present invention relates to a polarizing plate used in liquid crystal display devices and the like, and a photocurable adhesive for forming the polarizing plate. Background technique [0002] Liquid crystal display devices are rapidly flooding the market in watches, mobile phones, personal portable terminals (PDAs), notebooks, monitors for computers, DVD players, and TVs. A liquid crystal display device is a device that visualizes a state of polarization caused by switching of liquid crystals, and a polarizer can be used based on the display principle. In particular, high brightness, high contrast, and wide viewing angle are increasingly required in applications such as TVs, and high transmittance, high polarization, and high color reproducibility are also increasingly required for polarizers. [0003] Polarizers used in fields related to liquid crystal displays and the like are generally manufactured by uniaxially stretching polyvinyl alcohol (P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02F1/1335C09J4/02C09J167/06
CPCC09J7/22C09J7/29C09J7/385C09J133/04C09J2203/318G02B5/305
Inventor 键山聪子石崎慎治池田秀和
Owner TOYO INK SC HOLD CO LTD