Polypropylene highly spread plexifilamentary fiber

A polypropylene three-dimensional plexifilamentary fiber having a microwave birefringence of 0.07 or more and an &upbar& Mw/ &upbar& Mn of 4.3 or less. Although a spreading agent is not included in this fiber, the fiber has a superior fiber spreadability and dimensional stability. Th...

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Bibliographic Details
Main Authors SHIMURA; KAZUHIKO, NAKAYAMA; YOSHIAKI
Format Patent
LanguageEnglish
Published 25.07.1995
Edition6
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Summary:A polypropylene three-dimensional plexifilamentary fiber having a microwave birefringence of 0.07 or more and an &upbar& Mw/ &upbar& Mn of 4.3 or less. Although a spreading agent is not included in this fiber, the fiber has a superior fiber spreadability and dimensional stability. The fiber in accordance with the present invention can be spun from a dope composed of an isotactic polypropylene having an &upbar& Mw/ &upbar& Mn of 4.3 or less and an MFR of 20 or less, and a halogenated hydrocarbon, by a flash spinning technique. Further, the present invention provides a spinning dope and a method of manufacturing the fiber which effectively prevent ozone layer destruction by using a 2,2-dichloro-1,1,1-trifluoroethane, a 1,2-dichlorotrifluoroethane or a solvent blended a dichloromethane with either of the above two solvents as the halogenated hydrocarbon.
Bibliography:Application Number: US19920982055