Film blowing machine and method for producing a film web

Abstract

A film blowing machine for producing a film web from a recycled material having ⋅a.-an extruder for melting and homogenizing the recycled material into a melt, ⋅b. an annular die for extruding a film tube, ⋅c. a guide for a melt flow between the extruder and the annular die via an annular die melt pump, for conveying the melt to the annular die, ⋅d. a tube-forming zone for longitudinal and transverse drawing of the film tube, ⋅e. a cooling means for the film tube moving in the machine direction, ⋅f. a flattening unit on the other side of the tube-forming zone for flattening the film tube into a double layer film web, ⋅g. a pair of draw-off rollers on the other side of the cooling means for drawing off the film tube, and ⋅h. the extruder is designed as a twin-screw extruder.

Dependencies are inferred from the claim text.