PATCH AND PATCH PREPARATION

• US 20090247924A1
• Filed: 07/13/2007
• Published: 10/01/2009
• Est. Priority Date: 07/13/2006
• Status: Abandoned Application

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: Sakuraea, Ryouhei, Harima, Jun
• Application Number:
  US12/373,393
• Publication Number:
  US 20090247924A1
• Time in Patent Office: Days
• US Class Current: 602/48
• CPC Class Codes: A61F 2013/00651 tapered, bevelled or chamfered
• CPC Class Codes: A61K 9/703 characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
• CPC Class Codes: A61K 9/7053 obtained by reactions only involving carbon to carbon unsaturated bonds, e.g. polyvinyl, polyisobutylene, polystyrene

Abstract

The present invention relates to a patch including a backing, a pressure-sensitive adhesive layer formed on one surface of the backing, and a liner having a thickness of T and laminated on the pressure-sensitive adhesive layer, in which the liner has a groove formed from the surface opposite to the surface on which the pressure-sensitive adhesive layer is laminated and having a depth of from T/2 to less than T, the groove has a planar shape which enables the liner to be divided into two or more liner pieces by the groove, and the liner has a bending resistance before forming the groove of 50 mm or more.

Claims

1. A patch comprising a backing, a pressure-sensitive adhesive layer formed on one surface of the backing, and a liner having a thickness of T and laminated on the pressure-sensitive adhesive layer, wherein the liner has a groove formed from the surface opposite to the surface on which the pressure-sensitive adhesive layer is laminated and having a depth of from T/2 to less than T, the groove has a planar shape which enables the liner to be divided into two or more liner pieces by the groove, and the liner has a bending resistance before forming the groove of 50 mm or more.

2. The patch according to claim 1, wherein the groove has a width at the bottom of 200 μ

m or less.

3. The patch according to claim 2, wherein the groove has a cross-sectional shape of a substantially U-shape or a substantially V-shape.

4. A patch preparation comprising the patch according to claim 1, wherein the pressure-sensitive adhesive layer contains a drug.