Unlock instant, AI-driven research and patent intelligence for your innovation.

Pressure-sensitive adhesive tape or sheet

A technology of adhesive tape and adhesive, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., can solve the problem of low initial adhesive force and bonding reliability, It is difficult to balance the adhesion and easy peeling of the adherend to achieve the effect of easy separation and disassembly

Inactive Publication Date: 2012-05-23
NITTO DENKO CORP
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This acrylic pressure-sensitive adhesive sheet has problems of low initial adhesive force and adhesion reliability at the time of bonding
[0006] It is difficult for these acrylic adhesive sheets to achieve both excellent adhesion to adherends and easy peelability

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
  • Pressure-sensitive adhesive tape or sheet
  • Pressure-sensitive adhesive tape or sheet
  • Pressure-sensitive adhesive tape or sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0323] The thermally expandable microparticle-containing adhesive composition A is coated on the surface of the release film B that has been peeled in a thickness of 100 μm to form a thermally expandable microparticle-containing adhesive composition. This heat-expandable microparticle-containing pressure-sensitive adhesive composition layer covers the release-treated surface of the release film A to obtain a sheet having a heat-expandable microparticle-containing pressure-sensitive adhesive composition layer between the two release films. (Adhesive composition layer sheet containing thermally expandable microparticles). The illuminance of the adhesive composition layer containing heat-expandable microparticles: 4mW / cm 2 , light intensity: 1200mJ / cm 2Under the conditions of ultraviolet irradiation, the adhesive composition layer containing heat-expandable microparticles is photocured, and a sheet having an adhesive layer containing heat-expandable microparticles between two pe...

Embodiment 2

[0326] Instead of the heat-expandable microparticle-containing adhesive composition A, except that the heat-expandable microparticle-containing adhesive composition B was used, it was performed in the same manner as in Example 1, and a film containing PSA layer sheet of thermally expandable fine particles (thermally expandable fine particle containing PSA layer sheet B). In addition, the solvent-insoluble content of the heat-expandable fine particle-containing pressure-sensitive adhesive layer was 65% by weight.

[0327] Then, in the same manner as in Example 1, the adhesive layer sheet B containing heat-expandable microparticles was bonded to the above-mentioned viscoelastic body layer sheet A to obtain a viscoelastic body layer containing microparticles containing air bubbles on one side. Adhesive sheet with adhesive layer of thermally expandable fine particles (sheet having a laminated structure of release film A / viscoelastic layer containing bubble mixed fine particles / adh...

Embodiment 3

[0329] In place of the heat-expandable fine particle-containing adhesive composition A, except that the heat-expandable fine-particle-containing adhesive composition C was used, it was performed in the same manner as in Example 1, and a film containing PSA layer sheet of thermally expandable fine particles (thermally expandable fine particle-containing PSA layer sheet C). In addition, the solvent-insoluble content of the heat-expandable fine particle-containing pressure-sensitive adhesive layer was 66% by weight.

[0330] Then, in the same manner as in Example 1, the adhesive layer sheet C containing heat-expandable microparticles was bonded to the above-mentioned viscoelastic body layer sheet A to obtain a viscoelastic body layer containing microparticles containing bubbles on one side. Adhesive sheet with adhesive layer of thermally expandable fine particles (sheet having a laminated structure of release film A / viscoelastic layer containing bubble mixed fine particles / adhesi...

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

No PUM Login to View More

Abstract

The present invention relates to a pressure-sensitive adhesive tape or sheet that can maintain high initial adhesive force and adhesion reliability (particularly, repelling resistance) at the time of bonding and can easily be peeled off and can separate and dismantle a joined part at the time of peeling. The adhesive sheet is characterized by comprising: a viscoelastic layer containing bubbles and / or fine particles; and a pressure-sensitive adhesive layer formed on at least one side of the viscoelastic layer and formed from a pressure-sensitive adhesive composition comprising a monomer mixture comprising the following (a1), (a2) and (a3) or partially polymerized product thereof, and thermal-expandable fine particles: (a1) alkyl (meth)acrylate monomer having 4 to 12 carbon atoms in its alkyl moiety and having a glass transition temperature when formed into a homopolymer of lower than 0 DEG C; (a2) monomer having at least one nitrogen atom and one ethylenically unsaturated bond in its molecule; and (a3) monomer having one ethylenically unsaturated bond in its molecule and having a glass transition temperature when formed into a homopolymer of 0 DEG C or higher (excluding (a2) above).

Description

technical field [0001] This invention relates to adhesive tapes or sheets. More specifically, it relates to an adhesive tape or sheet capable of maintaining high initial adhesive strength and bonding reliability (particularly, resilience resistance) during bonding, and capable of being easily peeled off during peeling, and capable of separating and disassembling the bonded portion. Background technique [0002] At present, adhesive tapes or sheets ("tape or sheet" is sometimes simply referred to as "tape" or "sheet") are well utilized in various applications. As a representative example of an adhesive sheet, an acrylic adhesive having an adhesive layer (pressure-sensitive adhesive layer) formed using an acrylic adhesive composition (acrylic pressure-sensitive adhesive composition) can be mentioned. Bonding sheet (acrylic pressure-sensitive adhesive sheet). [0003] In addition, in recent years, as environmental awareness has become stronger, there has been an increasing de...

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): C09J7/02C09J133/08C09J133/10C09J11/00C09J7/26
CPCC09J7/00C09J7/0289C09J7/0217C09J2205/11C09J2205/102C09J2205/106C08K7/00C08K7/28C09J2201/606C09J2205/302C09J2433/006C09J2201/36C09J2433/00C09J7/385C09J7/26Y10T428/2891C09J2301/412C09J2301/41C09J2301/408C09J2301/302C09J7/22C09J4/00C09J11/00C09J2301/16
Inventor 丹羽理仁中岛淳
Owner NITTO DENKO CORP