Method for fusing and homogenizing multimodal and bimodal polyolefins
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United States of America Patent
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Issued Date -
Nov 2, 2006
app pub date -
Apr 8, 2004
filing date -
Apr 30, 2003
priority date (Note) -
Abandoned
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Abstract
In a method of melting and homogenizing multimodal and bimodal polyolefins, use is made of a multiple-shaft first extruder (1) and a second extruder (2) which is disposed downstream thereof in the conveying direction (17). The second extruder (2) is also of multiple-shaft design. The outside diameter of the screw shafts (14, 15) of the first extruder (1) is smaller than the outside diameter of the second screw shafts (29, 30) of the second extruder (2). The first extruder (1) is driven at a higher rotational speed than the second extruder (2). The shear rate in the first extruder (1) is higher than in the second extruder (2).
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