STRETCHABLE PATCH

• Main Authors: OHATA, AKIKO, HIDAKA, OSAFUMI
• Format: Patent
• Language: English; French; German
• Published: 22.09.2004
• Edition: 7
• Subjects: HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES

A stretch plaster comprising a support membrane having a thickness of 1 to 50 mu m and a drug containing adhesive layer having a thickness of 3 to 400 mu m, wherein (i) the support membrane comprising a copolymer of 0 to 90% by weight of vinyl acetate, 10 to 97% by weight of alkyl (meth)acrylate having 3 to 14 of a mean carbon number of alkyl group and 0 to 15% by weight of (meth)acrylic acid, (ii) the copolymer is cross-linked by polyvalent metal such as aluminum or a poly-functional chain compound, wherein the cross-linking ratio is 20% or more of the theoretical total number of carboxyl group of the copolymer when the polymer is cross-linked by the polyvalent metal such as aluminum, and is 1 to 10 % expressed by copolymerized ratio of the poly-functional chain compound when the copolymer is cross-linked by poly-functional chain compound, (iii) the support membrane has 150g or less of self adhesion shown by an adhesion between the support membranes and (iv) the support membrane has 70% or more of an elasticity recovery when it stretches 10% of itself.