Pressure-sensitive adhesive tape for battery and battery using the pressure-sensitive adhesive tape
AssigneeNitto Denko Corporation
InventorsShigeki Kawabe, Yuichi Takamura, Jun Iwata, Hiroomi Hanai
Life of this patent
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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.
Claims4
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.
Dependencies are inferred from the claim text.