Process for the production of fibers

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United States of America Patent

PATENT NO 11859316
APP PUB NO 20210047755A1
SERIAL NO

17084859

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Abstract

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Fibers can include a polypropylene composition, which can include a metallocene random copolymer of propylene and a comonomer that is an alpha-olefin different from propylene. The metallocene random copolymer can have a comonomer content of from 1.2 wt % to 1.8 wt %, a molecular weight distribution of at least 1.0 and of at most 4.0 obtained without thermal or chemical degradation, and a melting temperature Tmelt of at most 140° C. A nonwoven can include the fibers, and a laminate can include the nonwoven. The fibers can be produced by polymerizing the propylene and comonomer in presence of a metallocene-based polymerization catalyst to obtain the metallocene random copolymer. The polypropylene composition can be melt-extruded to obtain a molten polypropylene stream, which can be extruded from capillaries of a spinneret to obtain filaments. A diameter of the filaments can be rapidly reduced to obtain a final diameter.

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Patent Owner(s)

Patent OwnerAddress
TOTALENERGIES ONETECH BELGIUMZONE INDUSTRIELLE C SENEFFE (FELUY) 7181

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bieser, John Houston, US 13 96
Haubruge, Hugues Walhain, BE 14 188
Henry, Gaetan Bovesse, BE 1 0
Pavy, Guillaume Brussels, BE 15 195
Standaert, Alain Brussels, BE 44 329

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