New Solutions in Coextrusion, 2001 European PLC Conference Proceedings

Sven Hafenberg--Blown film processors need new solutions to expand operating boundaries. Innovative solutions will help processors broaden the variety of films they can produce, maximize their time and investment, improve output rates, and improve the quality of their film. By increasing temperature isolation inside multilayer coextrusion dies processors can produce new structures with the properties that the market demands. By optimizing the blown film die gap processors can reduce the down time required to change lip sets and process film at optimum settings for the structure. By eliminating melt fracture on the surface of film, processors can produce film with more desirable properties for printing and eliminate the use of processing aids. By reducing blocking, processors can improve output, reduce additive costs and make film that is easier to convert. Results of field trials and laboratory tests show that these solutions work.