US 8,273,370 B2 · Adhesive patch

Abstract

An adhesive patch has a support and an adhesive layer formed on at least one surface of the support. The adhesive patch has a peripheral part and a central part 21. The adhesive layer has voids localized in the peripheral part, with the adhesive layer in the central part being substantially free of voids. The peripheral part preferably contains voids at 2.0-100 voids/mm3 on average. Since time-course changes of adhesive layer components such as additives are reduced, the adhesive patch is highly resistant to detachment from the skin, the components do not easily protrude from the edge of the adhesive patch during preservation in a package, adhesion to the inner surface of the package is suppressed, the adhesive patch can be easily removed from the package and edge lifting by cold flow is suppressed during adhesion to the skin.

Claims10

Dependent claims

An adhesive patch, comprising:

an impermeable support having opposite sides;
an adhesive layer formed on a surface of one of said sides of said support;
wherein said adhesive patch has a central part and a peripheral part and said adhesive layer is formed on said surface of said one of said sides of said support at both said central part and said peripheral part of said adhesive patch;
wherein said adhesive layer has voids therein;
wherein said adhesive layer, in said central part of said adhesive patch, is substantially free of said voids;
and
wherein said adhesive layer, in said peripheral part of said adhesive patch, has said voids localized therein.

4 more elements

Dependencies are inferred from the claim text.

Adhesive patch

Life of this patent

Adhesive patch

Life of this patent

Abstract

Claims10