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

Adhesive sheet, display, and method for producing same

A display, adhesive sheet technology, applied in chemical instruments and methods, adhesives, adhesive types, etc., can solve problems such as light reflection loss, and achieve the effects of high film strength, step followability and excellent foaming resistance.

Active Publication Date: 2017-08-29
LINTEC CORP
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes an improved type of pressure sensitive adhesives that have better performance when used for bonding materials together with good durability against damage from bending or impacts during use. Additionally, this new design also prevents cracks on surfaces it'll come into contact while still being able to maintain its effectiveness over time due to environmental factors such as temperature changes.

Problems solved by technology

This patent describes how to enhance images displayed through displays without reducing their resolution due to gaps or other issues like reflectivity losses during normal use. One solution involves adding an adhere agent called glue onto one surface of the screen opposite from where the protection panels are located. By doing this, the thickness differences can be minimized while still maintaining good optical performance over time. Additionally, if any defects occur within certain areas along the edges of these screens, they will also affect the overall appearance of the device. To address this issue, another method described in previous technical solutions uses specific types of adhesives known as photoinitiation initiators instead of regular uv curatives.

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, display, and method for producing same
  • Adhesive sheet, display, and method for producing same
  • Adhesive sheet, display, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0098] (7) Preparation of adhesive composition

[0099] Adhesive composition P is the preparation of (meth)acrylate copolymer (A), after the obtained (meth)acrylate copolymer (A), thermal crosslinking agent (B), ultraviolet curable component ( C) and a photopolymerization initiator (D) are mixed, and it can also prepare by adding a silane coupling agent (E) and / or an additive as needed.

[0100] The (meth)acrylate copolymer (A) can be produced by polymerizing a mixture of monomers constituting a polymer by a normal radical polymerization method. The polymerization of a (meth)acrylate copolymer (A) can be performed by a solution polymerization method etc. using a polymerization initiator as needed. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, and the like, and two or more of them may be used in combination.

[0101] As a polymerization initiator, an azo compound, an organic pero...

Embodiment 1

[0154] 1. Preparation of (meth)acrylate copolymer

[0155] Copolymerization of (meth)acrylates was prepared by copolymerizing 60 parts by mass of 2-ethylhexyl acrylate, 10 parts by mass of isobornyl acrylate, 10 parts by mass of N-acryloylmorpholine, and 20 parts by mass of 2-hydroxyethyl acrylate. Object (A). When the molecular weight of this (meth)acrylate copolymer (A) was measured using the method mentioned later, the weight average molecular weight (Mw) was 500,000.

[0156] 2. Preparation of Adhesive Composition

[0157] 100 parts by mass of the (meth)acrylate copolymer (A) obtained in the above step 1 (solid content conversion value; hereinafter the same), trimethylolpropane-modified toluene diisocyanate as a thermal crosslinking agent (B) 0.2 parts by mass, 5.0 parts by mass of ε-caprolactone-modified tris(2-acryloyloxyethyl)isocyanurate as the ultraviolet curable component (C), 2 , 0.5 parts by mass of 4,6-trimethylbenzoyl-diphenyl-phosphine oxide, and 3-glycidoxyp...

Embodiment 2～5、 comparative example 1～2

[0178] In addition to the type and ratio of each monomer constituting the (meth)acrylate copolymer (A), the type and amount of the thermal crosslinking agent (B), the compounding amount of the ultraviolet curable component (C), and the photopolymerization The kind and compounding quantity of the initiator (D) were changed as shown in Table 1, and it carried out similarly to Example 1, and produced the adhesive sheet.

[0179] Here, the above-mentioned weight average molecular weight (Mw) is a standard polystyrene-equivalent weight average molecular weight measured (GPC measurement) under the following conditions using gel permeation chromatography (GPC).

[0180]

[0181] · GPC measurement device: HLC-8020, manufactured by TOSOH;

[0182] · GPC column (passed in the following order): manufactured by TOSOH

[0183] TSK guard column HXL-H

[0184] TSK gel GMHXL (×2)

[0185] TSK gel G2000HXL;

[0186] Determination of solvent: tetrahydrofuran;

[0187] · Measurement tempe...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides an adhesive sheet having high film strength and excellent section difference followership and foaming resistance of an adhesive layer, a display with excellent section difference followership and foaming resistance, and a method for producing the same. The adhesive sheet (1) is provided with an adhesive layer (11) for bonding a display constituting member (21) to another display constituting member (22), and the adhesive layer (11) is formed by a UV curing adhesive which has a crosslinked structure formed by (meth) acrylate copolymer (A) and a thermal crosslinking agent (B), a UV-curable component (C), and a photopolymerization initiator (D) with a light absorbance over 0.3 at a wavelength of 380 nm in an acetonitrile solution with concentration 0.1 mass%.

Description

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

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
Owner LINTEC CORP
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com