Blown film extrusion system

Details Blown film extrusion system Blown film extrusion system

B - Operations, Transporting

29

C

B29C 47/90 (2006.01)

Patent

CA 2558454

The invention relates to a blown film extrusion system (1) that comprises a blowing head (5), which extrudes a film tube (9), a pinch-off device (8), which pinches off the film tube (9), and comprises film guiding elements (7, 13, 27, 28) that guide the film tube (9) between its extrusion by the blow head and its pinching off. According to the invention, the guiding elements (7, 13, 27, 28) contain a porous, preferably microporous material.

L'invention concerne un système d'extrusion pour feuille soufflée (1) comprenant : une tête de soufflage (5) qui extrude une gaine de film (9), ainsi qu'un dispositif de pinçage (8) lequel compresse la gaine de film (9), et des éléments de guidage du film (7, 13, 27, 28) guidant la gaine de film (9) entre son extrusion par la tête de soufflage et son pinçage. L'invention est caractérisée en ce que les éléments de guidage (7, 13, 27, 28) contiennent un matériau poreux, de préférence microporeux.

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