Multi-stage drawing technique for forming porous fibers

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United States of America Patent

PATENT NO 10640890
APP PUB NO 20180291530A1
SERIAL NO

15765328

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Abstract

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A method for forming porous fibers is provided. The fibers are formed from a thermoplastic composition containing a continuous phase, which includes a matrix polymer, and a nanoinclusion additive that is at least partially incompatible with the matrix polymer so that it becomes dispersed within the continuous phase as discrete nano-scale phase domains. The method includes traversing a bundle of the fibers through a multi-stage drawing system that includes at least a first fluidic drawing stage and a second fluidic drawing stage. The first drawing stage employs a first fluidic medium having a first temperature and the second drawing stage employs a second fluidic medium having a second temperature. The first and second temperatures are both lower than the melting temperature of the matrix polymer, and the first temperature is greater than the second temperature.

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Patent Owner(s)

Patent OwnerAddress
KIMBERLY-CLARK WORLDWIDE INC2300 WINCHESTER ROAD NEENAH WI 54956

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carrillo, Ojeda Antonio J Appleton, US 16 37
McEneany, Ryan J Appleton, US 54 626
Scholl, Neil T Neenah, US 61 443
Topolkaraev, Vasily A Appleton, US 122 1785
Tower, Theodore T Appleton, US 18 484

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