NONWOVEN FABRIC FORMED FROM POLYVINYL BUTYRAL CONTINUOUS FIBERS, AND MANUFACTURING METHOD THEREFOR

A web is formed by integrating continuous fibers produced by melt-spinning, at a temperature of 220 °C or iower, polyvinyl butyral pellets having a butyralization degree of 50 to 90 mass%, an MFR of 0.5 to 45 g/10 min at 150 °C and 2.16 kgf, an acid value of 0.12 mgKOH/g or less, and a 1-butanal con...

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Bibliographische Detailangaben
Hauptverfasser:	SASAKI, Masahiro, SHIROTANI, Yasuhiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 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 PERFORMING OPERATIONS SPINNING TEXTILES TRANSPORTING TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	A web is formed by integrating continuous fibers produced by melt-spinning, at a temperature of 220 °C or iower, polyvinyl butyral pellets having a butyralization degree of 50 to 90 mass%, an MFR of 0.5 to 45 g/10 min at 150 °C and 2.16 kgf, an acid value of 0.12 mgKOH/g or less, and a 1-butanal content of 5 mass ppm or less, to give a meltblown nonwoven fabric or a spunbonded nonwoven fabric having a 1-butanal content of 10 mass ppm or less. The present invention thus provides a nonwoven fabric formed from PVB continuous fibers whose distinct odor is suppressed, and a manufacturing method therefor.