PT ZONE: Film Extrusion

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Proper purging procedures can avoid the need to shut down the line for cleaning. Here's one expert's advice. More (+)
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Eight Taiwanese machinery suppliers preview their exhibits at the upcoming national show. More (+)


MOST RECENT CONTENT: Film Extrusion

Taiwan Takes Its Place Among Machinery Elite

Overshadowed in geographic size and economic output by its neighbor to the east, Taiwan punches above its plastics weight class and is looking to become more self sufficient in its machinery offerings.

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OVERVIEW:
Film Extrusion

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Film is divided into two subcategories: cast, or flat film; and blown film. In the former, hot plastic is extruded through a flat, slit die onto a polished chill roll where it is quenched, pulled to a second set of rolls to cool the other side, then wound. In blown film, plastic is extruded into a cylindrical die, then inflated to form a bubble, which is ultimately cooled and collapsed. Films can be either single or multi-layer. Most are based on polyethylene. Bags are one primary example of film extrusions.


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