[방적] Extrusion of Polyethylene Through a Square Slot in Rotating Die Systems 출판일 : 2009.04.01 저자 : Amit Rawal, Tahir Shah, Subhash Anand 서지사항 : Textile Research Journal, Volume 79, Issue 6, 483 페이지 등록일 : 2011.05.20 I 조회수 : 73 작성자 : admin |
In a melt extrusion process consisting of a static die (spinneret), the geometry of extrudate
is mainly dependent upon die slot geometry, rheological properties of polymer, pressure
drop and drawing conditions. However, in a patented Netlon® process, a static die is
replaced by two counter-rotating dies in a melt extrusion process for producing a net
structure. In the present study, a series of net structures was produced from a square die
slot under a given set of experimental variables (melt flow index, screw speed, take-up
speed, die rotational speed and die temperature) based upon the full factorial design.
Subsequently, the filament geometry within the net structure was characterized in terms of
shape and cross-sectional area. The filament shape was comparatively more complex, and
thus it was characterized by means of `Wadell roundness'. Combined effects of two
experimental variables were also analyzed on the filament geometry.
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