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3. Parameters affecting bubble geometry
The main difference between sheath blow molding and most other polymer processing methods is the presence of a free surface several meters long. In tube blow molding, the presence of a free surface results in a multitude of bubble profiles. The parameters controlling bubble geometry need to be well understood in order to produce a stable bubble with the desired dimensions and properties. Bubble geometry is controlled by :
drawing conditions (BUR and Dr);
cooling rate ;
the thermal and rheological properties of the materials used.
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Parameters affecting bubble geometry
Bibliography
- (1) - - Reinfenhauser http://www.reifenhauser. com/en/folienanlagen/p0003_schlauch_mod.asp
- (2) - - Plastics Extrusion Technology Handbook, Levy &...
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