Transdermal therapeutic plaster

Details Transdermal therapeutic plaster Transdermal therapeutic plaster

A - Human Necessities

61

M

A61M 37/00 (2006.01) A61K 9/70 (2006.01)

Patent

CA 2106374

A process for continuously manufacturing transdermal thera- peutic patches having a backing layer, a pressure-sensitive adhesive drug reservoir layer, and a removable protective layer, whereby loss of active substances during fabrication of the patches is minimized, said process being charac- terized in that, in a tape-like laminate having a pres- sure-sensitive adhesive backing layer (1) and a removable protective layer (3), single quadrangular pressure-sen- sitive adhesive drug reservoir sections (2) are inserted one after the other in the longitudinal direction between the layers (2,3); the clearance between said drug reservoir sections remains constant in the longitudinal direction; their width is calculated such that the backing layer (1) and the removable protective layer (3) project beyond both sides of said sections; the pressure-sensitive adhesive backing layer (1) is first cut by punching in such a way that the punching line (1a) surrounds the individual drug reservoir sections (2) at an evident distance from their outer dimensions; the the resulting lattice-type refuse of the drug-free pressure-sensitive adhesive backing layer (1) is removed; and subsequently the protective layer (3) is cut in the resultant spaces between the drug reservoir sections (2).

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