Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Adhesive sheet and optical laminate

A technology for optical laminates and adhesive sheets, applied in the directions of adhesives, layered products, film/sheet release liners, etc., can solve problems such as reflection loss, and achieve excellent step followability, step followability and brightness unevenness suppression Excellent effect

Pending Publication Date: 2021-03-05
LINTEC CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if the adhesive layer does not follow the level difference, the adhesive layer will float near the level difference, resulting in light reflection loss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adhesive sheet and optical laminate
  • Adhesive sheet and optical laminate
  • Adhesive sheet and optical laminate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0137] (2) Preparation of adhesive composition

[0138] Adhesive composition P can be prepared in the following manner: prepare (meth)acrylate polymer (A), obtain (meth)acrylate polymer (A), crosslinking agent (B) and active The energy ray-curable component (C) is mixed, and a photopolymerization initiator (E), additives, and the like are added as necessary. In the case of the light-diffusing adhesive layer 111, light-diffusing fine particles (D) may be further blended.

[0139] The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomers constituting a polymer by a normal radical polymerization method. It is preferable to perform polymerization of a (meth)acrylate polymer (A) by the solution polymerization method using a polymerization initiator as needed. However, the present invention is not limited thereto, and polymerization may be performed without a solvent. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobuty...

manufacture example 1

[0205] [Production Example 1] (Production of light-diffusing adhesive sheet)

[0206] 1. Preparation of (meth)acrylate polymer

[0207] Copolymerize 65 parts by mass of 2-ethylhexyl acrylate, 15 parts by mass of isobornyl acrylate, 5 parts by mass of N-acryloylmorpholine and 15 parts by mass of 2-hydroxyethyl acrylate by solution polymerization to prepare (methyl) Acrylate polymer (A). When the molecular weight of this (meth)acrylate polymer (A) was measured by the following method, the weight average molecular weight (Mw) was 500,000.

[0208] 2. Preparation of Adhesive Composition

[0209] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step 1 (value in terms of solid content; the same applies hereinafter), trimethylolpropane-modified toluene diisocyanate as a crosslinking agent (B) (manufactured by TOYO KAGAKU, INC., product name "BHS8515") 0.20 parts by mass, ε-caprolactone-modified tris-(2-acryloyloxyethyl)isocyanurate as active energy ray-cur...

manufacture example 2～7、9～10

[0230] [Production Examples 2-7, 9-10] (Production of light-diffusing adhesive sheet)

[0231]In addition to the types and ratios of the monomers constituting the (meth)acrylate polymer (A), the weight average molecular weight (Mw) of the (meth)acrylate polymer (A), and the blending of the crosslinking agent (B) amount, the blending amount of the active energy ray-curable component (C), the type and blending amount of the light-diffusing fine particles (D), the blending amount of the photopolymerization initiator (E), and the blending amount of the silane coupling agent Except that the total amount was changed to that shown in Table 1, in the same manner as in Production Example 1, a light-diffusing adhesive layer (b) (Production Example 2) and a light-diffusing adhesive layer (c) (Production Example 3) were produced. , Light-diffusing adhesive layer (d) (Manufacture Example 4), light-diffusing adhesive layer (e) (Manufacture Example 5), light-diffusing adhesive layer (f) (Man...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
storage modulusaaaaaaaaaa
storage modulusaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides an adhesive sheet which has excellent light diffusion uniformity and excellent step-difference followability, and an optical laminate. The adhesive sheet (1) is providedwith a composite adhesive layer (11), the composite adhesive layer (11) is provided with a light diffusion adhesive layer (111) containing light diffusion particles and a transparent adhesive layer (112) not containing light diffusion particles, and at least one of the light diffusion adhesive layer (111) and the transparent adhesive layer (112) is composed of an active energy ray-curable adhesive.

Description

technical field [0001] The present invention relates to an adhesive sheet having light diffusing properties and an optical laminate obtained using the adhesive sheet. Background technique [0002] In recent years, various mobile electronic devices such as smartphones and tablet terminals have been equipped with displays using display modules including liquid crystal elements, light emitting diodes (LED elements), organic electroluminescent (organic EL) elements, and the like. Displays are mostly touch panels. [0003] In such a display, for example, an adhesive is sometimes used to bond the display module to a protective panel for protection, or between the display module and a backlight system for illuminating it. . [0004] Here, when the protective panel and the display module are bonded together with an adhesive, a frame-shaped printed layer may exist in steps on the display module side of the protective panel. At this time, if the adhesive layer does not follow the l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30C09J7/10C09J7/25C09J4/06C09J4/02C09J11/06C09J11/08G02B5/02G09F9/30
CPCC09J7/30C09J7/10C09J7/255C09J4/06C09J11/06C09J11/08G02B5/02G09F9/30C09J2203/326C09J2203/318C09J2467/006C09J7/40B32B7/12C09J2301/208C09J2301/312C09J2301/416
Inventor 福岛裕贵小鲭翔高桥洋一
Owner LINTEC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com