Pressure-sensitive adhesive tape or sheet
AssigneeKao Soap Co., Ltd.
InventorsEiji Iijima, Yoshimi Nishimura
Life of this patent
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Abstract
A pressure-sensitive adhesive tape or sheet comprising an air-permeable substrate having coated thereon, an adhesive composition comprising (a) 3 to 25% by weight of a water-soluble polyol and (b) 1 to 25% by weight of a water-soluble or water-swellable polymer, the sum of the contents of the components (a) and (b) being at least 6% by weight, with the balance of the adhesive composition being an adhesive.
Claims7
A pressure-sensitive adhesive tape or sheet, comprising an air-permeable substrate having coated thereon a layer of an adhesive composition, said adhesive composition consisting essentially of a substantially homogeneous mixture of (a) 3 to 25% by weight of a water-soluble polyol selected from the group consisting of glycerin, propylene glycol, butylene glycol, hexylene glycol, polyethylene glycols having a molecular weight not higher than 1000, ethylene glycol, polypropylene glycol having a molecular weight of up to 1000, mannitol and sorbitol, (b) 1 to 25% by weight of a water-soluble or water-swellable polymer selected from the group consisting of polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxyethyl cellulose, sodium alginate and polyethylene oxides having a molecular weight higher than 300,000, the sum of amounts of the components (a) and (b) being at least 6% by weight, based on the weight of the adhesive composition, and the balance of the adhesive composition essentially is a pressure-sensitive adhesive capable of adhering to and safe for use on
Dependencies are inferred from the claim text.