Dupont Teijin Films U.S. Limited Partnership

Daniel C Sanders

Steven R Cosentino

Stephen Keith Franzyshen

Fenghua Deng

William James Brennan

Peter N Nugara

Christine A Creegan

Bruce C Begnoche

Michael R Berry

A composite structure suitable for making transdermal delivery devices includes in sequence: (a) a liner film layer; (b) a containment layer having from zero to 15 wt % content of vinyl acetate repeating units, the layer including either a thermal bonding copolyester resin or a combination of an ethylene-vinyl acetate component and a nonpolar polymer; and (c) a polyester film layer less than 20 &#x3bc;m in thickness. A drug layer lies either between the liner film layer and the containment layer or within a concave depression in the containment layer. A composition including an ethylene-vinyl acetate component and an ABA block copolymer, wherein the A segments of the block copolymer are styrenic segments, is also provided. The composition includes between 1 and 15 wt % of vinyl acetate repeating units, based on the total weight of composition exclusive of any solvents.

Composite structure including a low vinyl acetate layer

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Richmond, VA, United States of America

Daniel C Sanders