Cellular fibers via soluble fluid injection

Details Cellular fibers via soluble fluid injection Cellular fibers via soluble fluid injection

D - Textiles, Paper

01

D

18/615

D01D 5/247 (2006.01) C08K 5/04 (2006.01) D01F 1/08 (2006.01) D01F 1/10 (2006.01)

Patent

CA 1290118

ABSTRACT A fiber having 1/2-50% substantially gas-filled and essentially all closed cells having a diameter of 0.2-25 microns and a length to diameter ratio of greater than 500 is disclosed. The fiber is made by mixing a fluorocarbon blowing agent into molten polymer, shearing the polymer at a high shear rate, extruding the polymer in a spinneret capillary at a low jet velocity and a low capillary entrance pressure and drawing down the polymer at a total extension greater than 1000.

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