Film extrusion

Films are defined as thin layers containing one or more polymers, with or without plasticizer. They can be taken as a dosage form or be applied directly as a wound dressing with therapeutic healing effect. Laminates consist of multiple layers of films or small plates. Compared with current technologies for the production of films such as the molding process, no toxic solvents are needed in hot melt extrusion. A special focus in film extrusion lies on the design of the die. Through a wide slot die, the melt is poured continuously onto a rotating steel roll in a thin layer. Using one or more winding stations, the film can be wound up onto a supporting material or be laminated.


Examples:

Applications: Transdermal patches, sublingual films
 
Leistritz Extrusion Team Leistritz Extrusionstechnik GmbH