Pressure-sensitive adhesive sheet, process for producing laminate including pressure-sensitive adhesive layer, laminate including pressure-sensitive adhesive layer, image display device, and touch panel

A technology of adhesive layer, manufacturing method, applied in the direction of film/sheet-shaped adhesive, non-polymer organic compound adhesive, adhesive type, etc., capable of solving problems such as deformation, distortion, and poor durability, Excellent foaming resistance, well-balanced moisture and heat resistance, and excellent reworkability

Active Publication Date: 2018-03-27
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a means for imparting level difference followability, there is a method of using a soft adhesive layer, but in the above-mentioned method, although the level difference followability is improved by making the adhesive layer soft, deformation and twist are easy to occur, Furthermore, there is a problem of poor durability

Method used

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  • Pressure-sensitive adhesive sheet, process for producing laminate including pressure-sensitive adhesive layer, laminate including pressure-sensitive adhesive layer, image display device, and touch panel
  • Pressure-sensitive adhesive sheet, process for producing laminate including pressure-sensitive adhesive layer, laminate including pressure-sensitive adhesive layer, image display device, and touch panel
  • Pressure-sensitive adhesive sheet, process for producing laminate including pressure-sensitive adhesive layer, laminate including pressure-sensitive adhesive layer, image display device, and touch panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0218] 0.2 parts of crosslinking agent (B-1), 40 parts of monofunctional unsaturated compound (C-1), 40 parts of polyfunctional unsaturated compound ( D-1) 1 part, photopolymerization initiator (E-1) 1 part, and the adhesive composition solution were prepared.

[0219] The pressure-sensitive adhesive composition solution was coated on a polyester release sheet so that the thickness after drying was 100 μm, and dried at 90° C. for 5 minutes to form a pressure-sensitive adhesive layer. The obtained pressure-sensitive adhesive layer was sandwiched between polyester-based release sheets, and aged at 40° C. for 3 days to obtain a substrate-free double-sided pressure-sensitive adhesive sheet [I-1].

[0220] In addition, the release sheet on one side was peeled off from the adhesive layer of the substrate-free double-sided adhesive sheet obtained above, and pressed against a 125 μm thick easily-adhesive treated polyethylene terephthalate (PET) sheet to obtain The adhesive layer-atta...

Embodiment 2

[0222]

[0223] Except that the compounding ratios of (A) to (E) components were changed to the compounding ratios described in Table 2, the substrate-less double-sided adhesive sheets [I-2] and [I' were obtained in the same manner as in Example 1. -1], [I'-2] and PET sheet with adhesive layer [II-2], [II'-1], [II'-2], [III-2], [III'-1 ], [III'-2].

Embodiment 3

[0225] An adhesive was obtained in the same manner as in Example 1, except that the compounding ratios of the components (A) to (E) were changed to the compounding ratios described in Table 2 and applied so that the thickness after drying was 160 μm. A substrate-less double-sided adhesive sheet [I-3] and a PET sheet with an adhesive layer [II-3], [III-3] with a layer thickness of 160 μm.

[0226] [Table 2]

[0227] Table 2

[0228]

[0229] The gel fraction of the adhesive layer, the Optical properties and resistance to blistering. In addition, the adhesive strength of the adhesive layer was measured using the above-mentioned PET sheets [II-1] to [II-3], [II'-1], [II'-2] with an adhesive layer, and the height difference was evaluated. followership. Furthermore, the heat-and-moisture resistance of the adhesive layer was evaluated using the PET sheets [III-1] to [III-3], [III'-1], and [III'-2] with an adhesive layer described above. The results are shown in Table 3 below...

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Abstract

The purpose of the present invention is to provide a pressure-sensitive adhesive sheet which is excellent in terms of level difference conformability and blistering resistance and which has an excellent balance among pressure-sensitive adhesive properties (adhesive force, holding power), moist-heat resistance, and blistering resistance and has a high level of reliability. The pressure-sensitive adhesive sheet according the present invention includes a pressure-sensitive adhesive layer which comprises a crosslinked resin obtained from a functional-group-containing acrylic resin (A) and a crosslinking agent (B) and which further includes an ethylenic compound (C) having one ethylenically unsaturated group, the functional-group-containing acrylic resin (A) having a glass transition temperature of -35 DEG C or higher.

Description

technical field [0001] The present invention relates to an adhesive sheet, a method for producing a laminate with an adhesive layer, a laminate with an adhesive layer, an image display device, and a touch panel. The pressure-sensitive adhesive sheet of the pressure-sensitive adhesive layer is also excellent in foamability, and has a well-balanced pressure-sensitive adhesive property and heat-and-moisture resistance. Background technique [0002] In recent years, in various fields, display devices such as liquid crystal displays (LCDs) and input devices such as touch panels used in combination with the above-mentioned display devices are widely used. Transparent adhesive sheet. [0003] For example, a transparent double-sided adhesive sheet is used for attaching touch panels to various display devices and optical members (protective plates, etc.), but in this application, it is required to follow the structural changes in touch panels in recent years. Various altitude diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10B32B27/00B32B27/30C09J4/00C09J133/04G09F9/00
CPCB32B27/00B32B27/30C09J4/00C09J133/04G09F9/00C09J7/10C09J7/29C09J133/10G06F3/041
Inventor 浅野铁也
Owner MITSUBISHI CHEM CORP
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