Patent ID: 6267983
Filing Date: 2001-07-31
Classification: A61K,B32B

Abstract:
A transdermal patch which comprises a substrate sheet which comprises a composite film formed of a resin composition consisting essentially of a mixture of 100 parts by weight of a polyvinyl chloride-polyurethane composite and 2-10 parts by weight of a styrene-ethylene-butylene-styrene copolymer, a polyurethane adhesive layer on one side of the composite film, and a polyalkylene terephthalate film adhered to said one side of the composite film by the first polyurethane adhesive layer; a primer layer which comprises a saturated polyester resin and is formed on a surface of the polyalkylene terephthalate film; and a second adhesive layer comprising a styrene-diene-styrene block copolymer containing a pharmaceutical agent layered on the primer layer.