Stretchable pressure-sensitive adhesive sheet

Patent metadata

Field	Value
Publication number	US-9624404-B2
Application number	US-201514806188-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Jul 23, 2014
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

This invention provides a PSA sheet that allows prevention or reduction of damage such as fracture with efficient stretch removability. A stretchable PSA sheet is provided, comprising a PSA layer and a film-like substrate supporting the PSA layer. The PSA sheet has a long section. The long section has a tapered segment that extends, tapering to a first end of the length direction and the film-like substrate has a minimum cross-sectional area larger than 0.30 mm 2 in the tapered segment.

First claim

What is claimed is:

1. A stretchable pressure-sensitive adhesive sheet comprising:
a pressure-sensitive adhesive layer; and
a film substrate supporting the pressure-sensitive adhesive layer,
wherein
the pressure-sensitive adhesive sheet has a long section,
the long section has a tapered segment that extends, tapering to a first end of the length direction, and
the tapered segment has a minimum cross-sectional area larger than 0.30 mm 2 ,
the tapered segment has a width W 1 (mm) at the first end, a maximum width W 2 (mm), and a length L (mm) from the first end of the length direction of the long section to where the maximum width W 2 is located, satisfying an equation (W 2 −W 1 )/L<9.5/80.

2. The stretchable pressure-sensitive adhesive sheet according to claim 1 , wherein the stretchable pressure-sensitive adhesive sheet is capable of being removed in such a way it is pulled in the direction opposite the first end of the length direction from an adherend on which the stretchable pressure-sensitive adhesive sheet is adhered.

3. The stretchable pressure-sensitive adhesive sheet according to claim 2 , further comprising, as the pressure-sensitive adhesive layer, a first pressure-sensitive adhesive layer placed above a first face of the film substrate and a second pressure-sensitive adhesive layer placed above a second face of the film substrate.

4. The stretchable pressure-sensitive adhesive sheet according to claim 3 , wherein the stretchable pressure-sensitive adhesive sheet is capable of being removed in such a way that it is pulled out from between two adherends that bond together in a state of sandwiching the stretchable pressure-sensitive adhesive sheet.

5. The stretchable pressure-sensitive adhesive sheet according to claim 2 , wherein the film substrate is an unexpanded resin film substrate.

6. The stretchable pressure-sensitive adhesive sheet according to claim 1 , further comprising a tab at an end opposite the first end of the length direction of the long section.

7. The stretchable pressure-sensitive adhesive sheet according to claim 1 , further comprising, as the pressure-sensitive adhesive layer, a first pressure-sensitive adhesive layer placed above a first face of the film substrate and a second pressure-sensitive adhesive layer placed above a second face of the film substrate.

8. The stretchable pressure-sensitive adhesive sheet according to claim 7 , wherein the stretchable pressure-sensitive adhesive sheet is capable of being removed in such a way that it is pulled out from between two adherends that bond together in a state of sandwiching the stretchable pressure-sensitive adhesive sheet.

9. The stretchable pressure-sensitive adhesive sheet according to claim 1 , wherein the film substrate is an unexpanded resin film substrate.

10. The stretchable pressure-sensitive adhesive sheet according to claim 1 capable of fastening a battery.

Assignees

• Nitto Denko Corp

Inventors

• Jozuka Kenta
• Nakayama Naoki
• Nishida Yoshimasa
• Soeda Yoshikazu

Classifications

• C09J2203/318

  for the production of liquid crystal displays · CPC title

• C09J2201/128

  Chemistry & Metallurgy · mapped topic

• C09J2201/618

  Chemistry & Metallurgy · mapped topic

• C09J7/0217 Primary

  Chemistry & Metallurgy · mapped topic

• H01M2/1016

  Electricity · mapped topic