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Polarizing film with adhesive, optical laminate, and set of polarizing films

A technology for optical laminates and polarizing films, applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., can solve problems such as insufficient durability and low gel percentage, Achieves the effect of suppressing foaming and excellent recyclability

Inactive Publication Date: 2009-07-22
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] On one side of the glass unit for liquid crystal display, the first polarizing film formed by the composition of amorphous cyclic polyolefin resin film / polarizer / protective film is placed on the side of the amorphous cyclic polyolefin resin film. When laminating with an adhesive layer interposed therebetween, on the other side, laminating a second polarizing film on both sides of the polarizing plate with an acetylcellulose-based protective film bonded to it with an adhesive layer interposed therebetween, such as in Japan After the adhesive with low gel percentage and high flexibility disclosed in JP 2006-77224 is applied to both sides of the glass substrate, it is left for a long time (for example, 100 hours) at a high temperature (for example, under a dry condition of 80°C). ) in the case of insufficient adhesive cohesion, floating or peeling, air bubbles, etc. will occur between the adhesive layer and the amorphous cyclic polyolefin resin film, resulting in insufficient durability Case
In addition, on both sides of the glass unit for liquid crystal display, the polarizing film formed by the composition of amorphous cyclic polyolefin resin film / polarizer / protective film is sandwiched between the amorphous cyclic polyolefin resin film side. Adhesives exhibiting high softness with a low gel percentage are applied when the adhesive layer is laminated, apparently still giving rise to the same problems

Method used

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  • Polarizing film with adhesive, optical laminate, and set of polarizing films
  • Polarizing film with adhesive, optical laminate, and set of polarizing films
  • Polarizing film with adhesive, optical laminate, and set of polarizing films

Examples

Experimental program
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Effect test

no. 1 approach

[0134] For the first embodiment of the optical laminate, in the main reference image 3 , and optionally also refer to Figure 4 while explaining. In this mode, it is preferable to sandwich the first polarizing film 15 formed by the composition of amorphous cyclic polyolefin resin film 12 / polarizer 13 / protective film 14 between the amorphous cyclic polyolefin resin On the side of the film 12, the first adhesive layer 11 with a gel percentage of 75% to 95% by weight is bonded to one side of the glass unit 35 for liquid crystal display, and on the other side of the glass unit 35 for liquid crystal display, the second adhesive layer is sandwiched between The second adhesive layer 21 is attached to the second polarizing film 25 formed by attaching acetylcellulose-based protective films 21, 23 on both sides of the polarizer 23, and the gel percentage of the second adhesive layer 21 reaches 30% by weight. ~70% by weight.

[0135] In this form, although it is arbitrary which of th...

no. 2 approach

[0145] Next, for the second embodiment of the optical laminate, still mainly refer to image 3 , and optionally also refer to Figure 4 while explaining. In this mode, the first polarizing film 15 formed by the composition of the amorphous cyclic polyolefin resin film 12 / polarizer 13 / protective film 14 is interposed between the amorphous cyclic polyolefin resin film 12. On the other side, the first adhesive layer 11 with a gel percentage of 75% to 95% by weight is laminated on one side of the glass unit 35 for liquid crystal display. On the other side of the glass unit 35 for liquid crystal display, an amorphous ring The second polarizing film 25 formed by the composition of polyolefin-based resin film 22 / polarizer 23 / protective film 24 sandwiches the non-crystalline cyclic polyolefin-based resin film 22 side and has a gel percentage of 75% by weight. -95% by weight of the second adhesive layer 21 is laminated.

[0146] For the second polarizing film 25 of this mode, it is ...

manufacture example 1

[0186]With respect to 100 parts of the non-volatile content of the acrylic resin A1 obtained in Polymerization Example 1, 5 parts of the crosslinking agent "Colonate L" was mixed as a solid content, and 0.1 part of the silane compound "X-41-1805" was mixed to prepare binder solution. This adhesive solution was coated on a release film of a polyethylene terephthalate film [trade name "PET3811", purchased from Lintec Co., Ltd.; referred to as a separator] that had undergone release treatment using an applicator. The mold-treated surface was dried to a thickness of 15 μm after drying at 100° C. for 1 minute to obtain a sheet-like adhesive. Let this be Adhesive 1.

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Abstract

The invention provides a polarizing film (10) with adhesive comprising a polarizing film (15), which has a structure composed of an amorphous cyclic polyolefin resin film (12) / a polarizer (13) / a protection film (14), and an adhesive layer (11) arranged on the outer side of the amorphous cyclic polyolefin resin film (12). The adhesive layer (11) has a gel fraction of 75-95% by weight. An optical laminate is obtained by bonding this polarizing film (10) with adhesive to one side of a glass cell (35) for liquid crystal displays. A second polarizing film (25) having a structure composed of a protection film (22), a polarizer (23) and another protection film (24) is bonded to the other side of the glass cell (35) via a second adhesive layer (21). When the protection film (22) is made of an acetylcellulose, the second adhesive layer (21) is composed of a material having a low gel fraction.

Description

technical field [0001] The present invention relates to a polarizing film with an adhesive used for bonding to a glass unit for a liquid crystal display, an optical laminate for bonding the same to a glass unit for a liquid crystal display, and for bonding it to a glass unit for a liquid crystal display Polarizing film set on both sides. The present invention also relates to a method of manufacturing a polarizing film with an adhesive. Background technique [0002] The glass unit for liquid crystal display commonly used in liquid crystal display devices such as TN (Twisted Nematic: Twisted Nematic) and STN (Super Twisted Nematic: SuperTwisted Nematic) has a liquid crystal component sandwiched between two glass substrates. structure. In addition, optical films such as polarizing films, retardation films, and antireflection films are laminated on the surfaces of the respective glass substrates through an adhesive mainly composed of acrylic resin. A surface treatment layer s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30C09J7/02C09J11/06C09J133/00C09J7/29
CPCC09J2201/162G02B1/105C09J7/0296C09J2423/006G02F2202/28C09J2433/00G02B5/3033C09J7/29Y10T428/26Y10T428/31786Y10T428/31938G02B1/14C09J2301/162C09K2323/031C09J133/08G02B5/30
Inventor 竹厚流杉原昌子猪口雄平张柱烈
Owner SUMITOMO CHEM CO LTD
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