Adhesive sheet, optical film with adhesive, and manufacturing method of image display device

An optical film and adhesive sheet technology, applied in the direction of film/sheet adhesives, adhesive types, chemical instruments and methods, etc. The progress of curing and the effect of improving the reliability of the adhesive

CN106244033AActive Publication Date: 2016-12-21NITTO DENKO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-12-21

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Abstract

The invention relates to an adhesive sheet, an optical film with an adhesive, and a manufacturing method of an image display device. The invention provides an adhesive sheet and an optical film comprising the adhesive sheet and an adhesive. The absorbing performance and adhesion reliability are both taken into account. The characteristic change due to the environment before adhering is inhibited. A protective sheet (31) is releasably attached on one surface of the adhesive layer (21) of the adhesive sheet (41). The adhesive layer (21) contains a UV cured adhesive. The protective sheet (31) has a transmittance of 1% or less to an ultraviolet ray with a wavelength of 360 nm. The protective sheet (31) can shield UV rays, so the adhesive layer (21) will not be cured easily by the UV rays emitted from a fluorescent lamp or other objects, and the adhesive characteristic change caused by the environment before adhering is inhibited.
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Description

technical field

[0001] The present invention relates to an adhesive sheet and an adhesive-attached optical film having the adhesive sheet. In addition, the present invention relates to a method of manufacturing an image display device using an optical film with an adhesive. Background technique

[0002] Liquid crystal display devices and organic electroluminescent display devices are widely used as various image display devices such as mobile phones, car navigation devices, monitors for personal computers, and televisions. In order to prevent damage to the image display panel due to impact from the outer surface of the image display panel (liquid crystal panel or organic electroluminescent panel), sometimes a transparent resin plate or glass plate is provided on the visible side of the image display panel. board (also known as "window layer", etc.).

[0003] As a method of arranging a front transparent plate on the front surface of an image display panel, an "interlayer fi...

Examples

Embodiment

[0097] Hereinafter, the present invention will be described in more detail with examples and comparative examples, but the present invention is not limited to these examples.

[0098] [Production of visible side adhesive sheet]

[0099] (Preparation of Base Polymer)

[0100] 70 parts by weight of 2-ethylhexyl acrylate (2EHA), 15 parts by weight of N-vinylpyrrolidone (NVP), 15 parts by weight of hydroxyethyl acrylate (HEA), 0.2 parts by weight of AIBN and 0.12 parts by weight as thermal polymerization initiators Parts by weight of α-thioglycerol (TGR) as a chain transfer agent and 233 parts by weight of ethyl acetate are dropped into a reaction vessel with a thermometer, a stirrer, a condenser and a nitrogen gas inlet pipe, and stirred under a nitrogen atmosphere at 23°C Nitrogen replacement was carried out for 1 hour. Then, a reaction was performed at 65°C for 5 hours, followed by a reaction at 70°C for 2 hours, thereby preparing an acrylic base polymer solution.

[0101] (...