Patent ID: 6955842

Claim:
A sealed packaging system composed of composite packaging material which contains a product having volatile active ingredients, said composite material having a strength and no significant uptake of active ingredients of the product, said packaging system comprising: layers defining a space for holding the product between said layers, said layers comprising barrier layers on opposite sides of the space holding the product forming a barrier against volatile active ingredients; and heat-sealing lacquer layer(s) between said respective opposite barrier layers, said heat-sealing lacquer layers: extending around the space for holding the product, being initially in a liquid phase applicable with printing machines; having no significant uptake of the active ingredient; having a weight per unit area in the range of between 1 and 15 grams per meter squared (g/m 2 ); and establishing adhesive forces after heat activation to form an adhesive layer having an adhesive strength in a region of strength of the packaging material wherein layers on both sides of the space for holding the product comprise opposing sealing area surfaces extending around the space for holding the product, said heat-sealing lacquer layers adhering to said sealing area surfaces.