PLASTIC FILMS, ESPECIALLY FOR USE IN A DERMAL OR TRANSDERMAL THERAPEUTIC SYSTEM

摘要

A dermal or transdermal therapeutic system comprising a sheet-like substrate or reservoir containing readily volatile auxiliary agents or active agents, which substrate or reservoir is covered on one of its sides with a backing layer impermeable to the ingredients and on the opposite side with a detachable, likewise impermeable protective layer to prevent loss of ingredients during prolonged storage, is characterized in that both the backing layer and the protective layer are made of plastic film which is impermeably coated on both sides with vapour-deposited metal.