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5. Limits of the flat film extrusion process
Analysis of the cast process shows that the flow of molten polymer during stretching is mainly elongational. To quantify the intensity of this elongation, it is conventional to introduce the notion of draw ratio, defined as (see figure
22
):
( 1 )
with :
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Limits of the flat film extrusion process
Modeling the drawing stage
References
Machine manufacturers (non-exhaustive list)
Axon Plastics Machinery AB
Battenfeld Gloucester Europe Ltd
Berstorff GmbH
Black Clawson Converting Machinery LLC
Brückner Maschinenbau GmbH
Collin Dr, GmbH
Davis Standard France
Dolci Extrusion SpA
...
Theses
- - http://www.sudoc.abes.fr
- SOLLOGOUB (C.) - Étude du procédé d'extrusion couchage de films polymères sur tôle d'acier. - École nationale supérieure des mines (2003).
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