Patent ID: 8529807

Claim:
A method for removing contaminating substances from a polymer carrier material comprising a) heating an active-ingredient-containing drug, food or cosmetic-containing coating composition to approximately 40 to 100° C., b) coating the heated active-ingredient-containing drug, food or cosmetic coating composition onto a neutralized polymer carrier material via synchronized rollers, flavor and/or fragrance within said coating composition diffusing into and thereby contaminating said polymer carrier material with flavor and/or fragrance, wherein the polymer carrier material is supplied on a reel, c) drying the coated polymer carrier material to form an active-ingredient-containing drug, food or cosmetic film, d) peeling the dried active-ingredient-containing film off the contaminated polymer carrier material and e) subjecting the contaminated polymer carrier material to a thermal treatment which comprises i) passing said contaminated polymer carrier material through a thermal treatment zone whose temperature is approximately 80° C. and for a period of time of approximately 0.5 to 6 minutes that is sufficient to remove the flavor and/or fragrance from the polymer carrier material to form a neutralized polymer carrier material, and ii) feeding the removed contaminating substances to a thermal after-burner using controlled air circulation, and f) providing the neutralized polymer carrier material to said coating step.