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TAC base for cycloolefin polymer bonding, TAC bonding member, and liquid crystal display device

A cycloolefin-based technology for bonding parts, applied in the direction of adhesives, adhesive additives, film/sheet-like adhesives, etc. Excellent strength, outgassing, and improved transparency

Inactive Publication Date: 2012-10-03
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the following patent document 1, although the bubble release property is good, but in view of its combination, it can only be bonded by applying heat above 100°C. Therefore, if it is applied to the processing of a polarizing plate, the polarizing property will be damaged by heating. therefore not applicable
In addition, since one surface of the substrate sheet must be subjected to corona treatment, plasma treatment, spray treatment and other easy-adhesion treatment, there are problems such as prolonging the process or requiring special equipment.

Method used

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  • TAC base for cycloolefin polymer bonding, TAC bonding member, and liquid crystal display device
  • TAC base for cycloolefin polymer bonding, TAC bonding member, and liquid crystal display device
  • TAC base for cycloolefin polymer bonding, TAC bonding member, and liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] (adhesive layer)

[0116] In the examples, an adhesive sheet made of a polymer (styrene-based thermoplastic elastomer), paraffin, and toluene was used. Adjustments were made so that the mixing ratio of the polymer, paraffin, and toluene was 10% by weight, 20% by weight, and 70% by weight. The adjusted sample was thoroughly stirred, and the above-mentioned adjusted coating solution was coated on a TAC film (FUJITAC: 80 μm) with a laboratory automatic coater so that the film thickness after drying was 30 μm. Dry at room temperature for 1 minute to form an adhesive layer, and leave to stand for 100 seconds in a hot air dryer set at 80° C. to remove the solvent toluene. Then, the TAC film was taken out from the drier, and a spacer (silica gel PET (Silicompet) 100 μm) was laminated to prepare a sample.

[0117] (Exhaust performance evaluation)

[0118] A rectangular test piece with a width of 10 mm and a length of 250 mm was cut out from the TAC adhesive sheet to be evalu...

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Abstract

Disclosed are: a TAC base for cycloolefin polymer bonding, which has extremely excellent air release during the bonding, excellent transparency and excellent bonding workability, while being capable of enhancing the bonding strength without deteriorating the polarization properties after the bonding; a TAC bonding member; and a liquid crystal display device. Specifically disclosed is a TAC base for cycloolefin polymer bonding, which has a bonding layer on the surface of a TAC base. The bonding layer contains a paraffin or a naphthene, and at least one of an adhesion promoter, a TAC polymer, a cycloolefin polymer, a cycloolefin copolymer, a macromonomer or a thermoplastic elastomer. Consequently, the TAC base can be firmly bonded with a cycloolefin polymer.

Description

technical field [0001] The present invention relates to an environment used in various displays such as liquid crystal displays used as liquid crystal display devices such as televisions, computers, car navigation systems, car dashboards, cash automatic teller machines (hereinafter referred to as ATM), mobile phones, etc. TAC substrates for bonding olefin-based polymers, TAC bonding parts, and liquid crystal display devices. Background technique [0002] Conventionally, liquid crystal display devices are widely known as displays used in televisions, computers, car navigation systems, vehicle dashboards, ATMs, mobile phones, and the like. This liquid crystal display device includes a liquid crystal cell having a liquid crystal layer formed between a pair of substrates, and a backlight unit that irradiates light from one surface side of the liquid crystal cell to the liquid crystal cell. [0003] Backlight units are known mainly of a direct type and an edge type. Since the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J11/06C09J123/00C09J153/02C09J201/00C09J7/22C09J7/38
CPCC09J7/0246C09J2401/006C09J2203/318C09J2400/22C09J145/00C09J7/0264C09J7/38C09J7/22
Inventor 谷口义尚田口好弘丸野正德吉田纯
Owner ALPS ALPINE CO LTD
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