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

Transparent double-sided pressure-sensitive adhesive tape or sheet and touch panel

A technology for contact panels and adhesive tapes, applied in the direction of adhesive types, ester copolymer adhesives, acid copolymer adhesives, etc., can solve the problems of reducing appearance and destroying ornamental properties, and achieve anti-bulging Anti-peeling, anti-warping, and good transparency

Inactive Publication Date: 2005-09-14
NITTO DENKO CORP
View PDF11 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when using a double-sided adhesive tape or sheet to bond a barrier base film such as polyethylene terephthalate (PET) film on a transparent plastic substrate such as a transparent substrate made of polycarbonate, the temperature or Under harsh conditions such as high temperature and high humidity, bubbles (foaming) are generated from transparent plastic substrates, etc., so that swelling or peeling occurs at the bonding interface with the adhesive layer, which not only reduces the appearance, but also significantly damages the ornamental quality

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
  • Transparent double-sided pressure-sensitive adhesive tape or sheet and touch panel
  • Transparent double-sided pressure-sensitive adhesive tape or sheet and touch panel
  • Transparent double-sided pressure-sensitive adhesive tape or sheet and touch panel

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0154] [Preparation Example 1 Acrylic polymer]

[0155] Add 97 parts by weight of butyl acrylate as a monomer component, 3 parts by weight of acrylic acid, 0.3 parts by weight of 2,2-azobisisobutyronitrile as a polymerization initiator, and 233.8 parts by weight of ethyl acetate as a polymerization solvent In the detached flask, stirring was carried out for 1 hour while introducing nitrogen gas. In this way, after removing oxygen in the polymerization system, the temperature was raised to 63° C., and the reaction was carried out for 10 hours to obtain an acrylic polymer solution having a solid content concentration of 30% by weight (sometimes referred to as “acrylic polymer solution A”). The weight average molecular weight of the acrylic polymer (it may be called "polymer A") in this acrylic polymer solution A is 550,000.

preparation example 2

[0156] [Preparation Example 2 Acrylic polymer]

[0157] Preparation Example 1 Similarly, an acrylic polymer solution having a solid content concentration of 30% by weight (may be referred to as "acrylic polymer solution B") was prepared. The weight-average molecular weight of the acrylic polymer (may be referred to as "polymer B") in this acrylic polymer solution B is 700,000.

preparation example 3

[0158] [Preparation Example 3 Acrylic polymer]

[0159] Except for using 80 parts by weight of butyl acrylate, 15 parts by weight of methyl acrylate, and 5 parts by weight of acrylic acid as monomer components, an acrylic polymer with a solid content concentration of 30% by weight was obtained in the same manner as in Preparation Example 1 of the acrylic polymer. Polymer Melt (sometimes called "Acrylic Polymer Solution C"). The weight average molecular weight of the acrylic polymer (it may be called "polymer C") in this acrylic polymer solution C is 600,000.

[0160] [Preparation Example 1 Oligomer]

[0161] 96 parts by weight of cyclohexyl methacrylate [the glass transition temperature of the homopolymer (polycyclohexyl methacrylate) is 66°C] as a monomer component, 4 parts by weight of acrylic acid, and 2-mercapto as a chain transfer agent 3 parts by weight of ethanol, 0.2 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator, and 120 parts by weight...

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
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

To prepare a transparent double-sided pressure-sensitive adhesive tape which excels in transparency, prevention of formation of floating and peeling, and prevention of warpage. The transparent double-sided pressure-sensitive adhesive tape or sheet has transparent pressure-sensitive adhesive layers formed on both sides of a transparent base material. At least one of the transparent pressure-sensitive adhesive layers is formed from a pressure-sensitive adhesive composition comprising (a) an acrylic polymer which contains an alkyl (meth)acrylate having a 4-12C alkyl group as a major monomer component and 3-10 pts.wt., based on 100 pts.wt. entire monomer components, carboxyl group-containing monomer as a monomer component and which has a weight average molecular weight of 500,000 to 900,000 and (b) an oligomer which contains a cyclic-structured ethylenically unsaturated monomer giving, when homopolymerized, a homopolymer having a glass transition temperature of 60-190[deg.]C as a major monomer component and 3-10 pts.wt., based on 100 pts.wt. entire monomer components, carboxyl group-containing monomer as a monomer component and which has a weight average molecular weight of 3,000-6,000.

Description

technical field [0001] The present invention relates to a transparent double-sided adhesive tape or sheet and a touch panel. Touch panel with double-sided adhesive tape or sheet. technical background [0002] In recent years, terminals of mobile communication devices (mobile phone terminals such as mobile phones and PHS devices, PDA terminals, etc.) have formed a large market. Regarding the terminals of such mobile communication devices, thinning, weight reduction, low power consumption, high definition, and high brightness can be mentioned as the main technical directions. In particular, PDAs equipped with a touch panel as an input device are being used such as image 3 The transparent conductive plastic film shown [for example, using polyethylene terephthalate film as a base material, a transparent conductive poly pair in which a conductive layer such as ITO (indium tin oxide) is formed on one side of the base material. transparent conductive plastic film such as ethylen...

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): B32B7/12C09J4/00C09J7/02C09J133/00C09J133/02C09J133/04C09J133/06
CPCC09J133/04C09J4/00B32B7/12C09J2201/128G02F2202/28C09J7/0217C09J2469/006C09J7/385C08L2666/02Y10T428/2848Y10T428/2891C09J2301/124A46B11/0041A46B5/0095A46B2200/1066B32B27/06B32B2457/208B32B27/365
Inventor 岸冈宏昭户崎裕
Owner NITTO DENKO 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