Method of making a pressure sensitive skin adhesive sheet material
AssigneeMinnesota Mining and Manufacturing Company
InventorsJames E. Garbe, Paul J. Northey, Timothy A. Peterson
Life of this patent
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Abstract
A method of making a pressure sensitive skin adhesive sheet material whereby a coating medium involving a liquid and a polymer is applied to a base layer of a polymer, and the liquid is allowed to diffuse into the base layer.
Claims27
A continuous method &making a pressure sensitive skin adhesive sheet material containing a liquid by combining a coating medium comprising said liquid with a polymeric base layer, which sheet material retains substantially all of the liquid until it is applied to the skin, comprising the steps of:
- (i) applying to a substrate layer a base layer of a first polymer said first polymer selected from the group consisting of acrylate polymers, polyisobutylenes, polyisoprenes, styrene block copolymers and silicone adhesives,
- (ii) applying continuously directly to said base layer a coating medium comprising a second polymer selected from the group consisting of acrylate polymers, polyisobutylenes, polyisoprenes, styrene block copolymers and silicone adhesives dissolved or dispersed in a liquid and allowing the coating medium to diffuse into the base layer to provide a pressure sensitive skin adhesive sheet material.
A method according to claim I wherein the liquid comprises isopropyl myristate.
A method of delivering a liquid to the skin, comprising the steps of
- (i) applying to a substrate layer a base layer of a first polymer said first polymer selected from the group consisting of acrylate polymers, polyisobutylenes, polyisoprenes, styrene block copolymers and silicone adhesives,
- (ii) applying continuously directly to said base layer a coating medium comprising a second polymer selected from the group consisting of acrylate polymers, polyisobutylenes, polyisoprenes, styrene block copolymers and silicone adhesives dissolved or dispersed in a liquid and allowing the coating medium to diffuse into the base layer to provide a pressure sensitive skin adhesive sheet material, and
- (iii) applying the pressure sensitive skin adhesive sheet material from step (ii) to the skin without prior removal of a substantial amount of the liquid from the pressure sensitive skin adhesive sheet material.
Dependencies are inferred from the claim text.