PROCEDE DE FABRICATION DE PELLICULES ETIREES BIAXIALEMENT ET DISPOSITIF POUR LA MISE EN OEUVRE DU PROCEDE

摘要

In a for the production of biaxially stretched films, a take-off roll 4 is arranged downstream of a draw-off roll 3 . A plastic melt is formed into an initial film by means of a slot die 1, cooled on the draw-off roll 3 and passed over the take-off roll 4 which has a predetermined surface roughness. The film is then biaxially stretched and heat-set.