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US 8,298,663 B2Granted
Pressure-sensitive adhesive sheet
AssigneeNitto Denko Corporation
InventorsKenichi Nishijima, Masato Shirai
Life of this patent
Estimating the term…
Abstract
Provided is a PSA sheet comprising a PVC film (support) provided with PSA layer formed of an aqueous dispersion-type PSA composition, which exhibits a smooth unwinding motion. The PVC film can be obtained by molding a PVC composition comprising PVC and a metal soap. The metal soap comprises an alkali earth metal soap and zinc soap. At least part of the alkali earth metal soap is a stearate and at least part of the zinc soap is zinc laurate.
Claims19
A roll of a pressure-sensitive adhesive tape comprising:
- (a) a polyvinyl chloride film support having first and second opposing sides and comprising:
- (i) polyvinyl chloride and
- (ii) metal soap comprising alkali earth metal soap and zinc soap, wherein the polyvinyl chloride film support contains a total of about 0.01 to 4 parts by mass of the zinc soap relative to 100 parts by mass of polyvinyl chloride, wherein at least part of the alkali earth metal soap is an alkali earth metal soap of stearic acid, and wherein the zinc soap consists of zinc laurate, and
- (b) a pressure-sensitive adhesive layer provided on the first side of the polyvinyl chloride film support, wherein the adhesive layer is formed from a rubber-based pressure-sensitive adhesive composition that is an aqueous dispersion comprising natural rubber;
- wherein the pressure-sensitive adhesive tape is in the form of a roll such that the pressure-sensitive adhesive layer is in contact with the second side of the polyvinyl chloride film support, and
- wherein the roll of pressure-sensitive adhesive tape is capable of being unwound to bind an electrical cord.
3 more elements
A roll of a pressure-sensitive adhesive tape comprising:
- (a) a polyvinyl chloride film support having first and second opposing sides and comprising:
- (i) polyvinyl chloride and
- (ii) metal soap comprising alkali earth metal soap and zinc soap, wherein at least part of the alkali earth metal soap is an alkali earth metal salt of stearic acid, wherein the polyvinyl chloride film support contains 0.1 to 4 parts by mass of the alkali earth metal salt of stearic acid and 0.01 to 4 parts by mass of the zinc soap relative to 100 parts by mass of polyvinyl chloride, and wherein the zinc soap consists of zinc laurate, and
- (b) a pressure-sensitive adhesive layer provided on the first side of the polyvinyl chloride film support, wherein the adhesive layer is formed from a rubber-based pressure-sensitive adhesive composition that is an aqueous dispersion comprising natural rubber;
- wherein the pressure-sensitive adhesive tape is in the form of a roll such that the pressure-sensitive adhesive layer is in contact with the second side of the polyvinyl chloride film support, and
- wherein the roll of pressure-sensitive adhesive tape is capable of being unwound to bind an electrical cord.
3 more elements
Dependencies are inferred from the claim text.