Pressure-sensitive adhesive tape for battery and battery using the pressure-sensitive adhesive tape

Patent metadata

Field	Value
Publication number	US-9755207-B2
Application number	US-201213405661-A
Country	US
Kind code	B2
Filing date	Feb 27, 2012
Priority date	Feb 28, 2011
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

The present invention relates to a pressure-sensitive adhesive tape for battery containing: a substrate; and a pressure-sensitive adhesive layer provided on at least one side of the substrate, in which the pressure-sensitive adhesive tape has a thickness change ratio of 20% or less after immersion in a mixed solvent of ethylene carbonate/diethyl carbonate [former/latter (volume ratio)=1/1] at 60° C. for 8 hours; and a 180° peeling adhesive strength (against aluminum foil, peel temperature: 25° C., peel rate: 300 mm/minute) of 0.5 N/10 mm or more after the above immersion.

First claim

What is claimed is:

1. A pressure-sensitive adhesive tape for battery comprising:
a substrate; and
a pressure-sensitive adhesive layer provided on at least one side of the substrate,
wherein the pressure-sensitive adhesive tape has a thickness change ratio of 20% or less after immersion in a mixed solvent of ethylene carbonate/diethyl carbonate [former/latter (volume ratio) =1/1] at 60° C. for 8 hours; and a 180° peeling adhesive strength (against aluminum foil, peel temperature: 25° C., peel rate: 300 mm/minute) of 0.5 N/10 mm or more after the above immersion,
wherein the pressure-sensitive adhesive layer does not contain a tackifier,
wherein the pressure-sensitive adhesive layer contains a crosslinking agent and an acrylic pressure-sensitive adhesive agent,
wherein monomer components constituting the acrylic pressure-sensitive adhesive agent contain an alkyl (meth)acrylate ester having an alkyl group having 5 to 12 carbon atoms as a main monomer, and the main monomer has a content of 50 to 100 wt % based on the total amount (100 wt %) of the monomer components constituting the acrylic pressure-sensitive adhesive agent,
wherein the acrylic pressure-sensitive adhesive agent contains a functional group-containing monomer as a monomer component constituting the acrylic pressure-sensitive adhesive agent, and the functional group-containing monomer has a content of from 3 wt % to 7 wt % based on the total amount of the monomer components.

2. A battery comprising a battery-constituting member and the pressure-sensitive adhesive tape for battery according to claim 1 attached to the battery-constituting member.

3. The battery according to claim 2 , wherein the battery-constituting member contains an electrode plate and an active material, wherein the pressure-sensitive adhesive tape is attached to a boundary part between a portion to which the active material is applied and a portion to which the active material is not applied on the electrode plate.

4. The battery according to claim 2 , wherein the battery-constituting member contains a laminated body having a structure of positive-electrode plate/separator/negative-electrode plate, wherein the laminated body or a winding body of the laminated body is fixed by the pressure-sensitive adhesive tape.

Assignees

• Kawabe Shigeki
• Takamura Yuichi
• Iwata Jun
• Hanai Hiroomi
• Nitto Denko Corp

Inventors

• Kawabe Shigeki
• Takamura Yuichi
• Iwata Jun
• Hanai Hiroomi

Classifications

• C09J2483/00

  Presence of polysiloxane · CPC title

• C09J2451/00

  Presence of graft polymer · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• C09J2423/00

  Presence of polyolefin · CPC title

• C09J2203/33

  for batteries or fuel cells · CPC title