Method and installation for producing a film made of a thermoplastic material

摘要

A method and an installation for producing a film made of a thermoplastic material, wherein the plastic material emerges from a blow head of an extruder while forming a film bubble. The film bubble is sized to a predetermined diameter by the action of a sizing device and is subsequently laid flat by a flattening device and is rolled up. To prevent damage to the surface of the film bubble, there is an electrostatic charge to the plastic material forming the film bubble prior to entry into the sizing device. The film bubble is conducted through a sizing device, which is electrostatically charged in the same way, to provide a contact-free sizing of the film bubble.