Dimensionally-stable melt blown nonwoven fibrous structures, and methods and apparatus for making same

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United States of America Patent

PATENT NO 11105018
APP PUB NO 20190338447A1
SERIAL NO

16514608

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Abstract

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A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.

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Patent Owner(s)

  • 3M INNOVATIVE PROPERTIES COMPANY

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brostrom, Myles L West Lakeland Township, US 14 306
Christiansen, Randy L Woodbury, US 3 10
Moore, Eric M Roseville, US 32 771
Percha, Pamela A Woodbury, US 22 346
Romano, Michael D Circle Pines, US 10 98
Song, Liming Woodbury, US 24 77
Swan, Michael D Lake Elmo, US 54 1488
Talwar, Sachin Woodbury, US 15 31
Zillig, Daniel J Woodbury, US 21 130

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