Hollow polymer fibers using rotary process

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length

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2642092, 2642111, D01D 518, D01D 524

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056226713

ABSTRACT:
In a method for producing hollow polymer fibers, molten polymer is supplied to a rotating polymer spinner having a peripheral wall. The spinner rotates so that molten polymer is centrifuged through a first tube extending through the peripheral wall of the spinner to form fibers. Gas is introduced into the interior of the molten polymer to form hollow polymer fibers. The hollow polymer fibers are then collected as a product such as a mat. The hollow polymer fibers produced by the method are microfibers having an average outside diameter of from about 2.5 microns to about 62.5 microns.

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