RETICULATE POLYPROPYLENE FIBERS, PROCESS FOR THEIR PRODUCTION, AND RETICULATE FIBER NONWOVEN FABRIC

A soln. of isotactic polypropylene in a specific solvent (trichlorofluoromethane) having a pressure higher than an extinction-initiating pressure (LIE) is introduced into a vacuum chamber at a pressure of not lower than the extinction-finishing pressure (LEE), and the chamber is kept at 198-220 deg....

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Bibliographic Details
Main Authors NAKAYAMA, YOSHIAKI, SHIMURA, KAZUHIKO
Format Patent
LanguageEnglish
French
German
Published 20.07.1994
Edition5
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
BRAIDING
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
COTTON-WOOL
FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS
KNITTING
LACE-MAKING
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
NON-WOVEN FABRICS
SPINNING
TEXTILES
TRIMMINGS
WADDING
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Summary:A soln. of isotactic polypropylene in a specific solvent (trichlorofluoromethane) having a pressure higher than an extinction-initiating pressure (LIE) is introduced into a vacuum chamber at a pressure of not lower than the extinction-finishing pressure (LEE), and the chamber is kept at 198-220 deg.C and at a pressure not higher than the extinction-finishing pressure (LEE) to prepare a soln. The resulting soln. is spun under such a condition that melt flow rate (MFR) immediately before extrusion satisfies the following MFR/C = 0.15-0.0014 (TPF-198)-1.74-0.029(TPF-198) (where TPF represents a soln. temp. and C represents a polypropylene concn. (wt.%)) to produce three-dimensionally reticulate polypropylene fibres. Nonwoven fabric is obtd. by opening the fibres.
Bibliography:Application Number: EP19870906933