NONWOVEN FABRIC STRUCTURE AND ITS PRODUCTION

PURPOSE:To obtain a nonwoven fabric structure with a high collection efficiency of dust and small pressure lose by forming many pores in a base fabric part formed from fiber groups of a thermoplastic resin and further cylindrical protrusions around the pores and integrating the resultant base fabric...

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Bibliographische Detailangaben
1. Verfasser:	MENDE TAKAYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BRAIDING CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE COTTON-WOOL ELECTRICITY 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 NON-WOVEN FABRICS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TEXTILES TRANSPORTING TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a nonwoven fabric structure with a high collection efficiency of dust and small pressure lose by forming many pores in a base fabric part formed from fiber groups of a thermoplastic resin and further cylindrical protrusions around the pores and integrating the resultant base fabric part with a net. CONSTITUTION:Fiber groups are blown from a melt blow die 10 to a perforated plate 12 provided with many openings (12a) and deposited thereon. In the process, the side opposite to the side of blowing the fibers is kept in a state of a lower pressure than that of the side blowing the fibers with the perforated plate as a boundary. The aforementioned fiber groups are projected from the above-mentioned openings (12a) to raise the protrusions in the form of cylinders and form the protruding parts 2 having the closed tips. The resultant fiber assembly is then peeled from the perforated plate 12 to afford a nonwoven fabric, which is subsequently integrated with a net 3 to provide the objective nonwoven fabric structure.