Modelling operation
Flat film extrusion: cast film
Article REF: AM3707 V1
Modelling operation
Flat film extrusion: cast film

Author : David SILAGY

Publication date: October 10, 2005 | Lire en français

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7. Modelling operation

7.1 Geometry optimization

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7.1.1 Influence on neck-in

The neck-in or lateral shrinkage of the polymer during stretching depends essentially on two factors: the process aspect ratio and the level of viscoelasticity of the polymer melt during stretching.

With a fixed process (geometry, i.e. aspect ratio and stretching ratio), figure 29 illustrates the...

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