Stretchable meltblown fabric with barrier properties

A barrier fabric having stretch and recovery properties and a method of producing are disclosed. The method includes the steps of heating at least one nonwoven web containing meltblown non-elastic thermoplastic polymer fibers to a temperature at which the peak total energy absorbed by the nonwoven w...

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Bibliographische Detailangaben
Hauptverfasser:	C.E. BOLIAN II, M.T. MORMAN, R.L. LEVY
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS BANDAGES, DRESSINGS OR ABSORBENT PADS BRAIDING CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS COTTON-WOOL DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS FILTERS IMPLANTABLE INTO BLOOD VESSELS FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS FIRST-AID KITS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FOMENTATION HUMAN NECESSITIES HYGIENE KNITTING LACE-MAKING LAUNDERING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL MEDICAL OR VETERINARY SCIENCE NATURAL OR ARTIFICIAL THREADS OR FIBRES NON-WOVEN FABRICS ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES OUTERWEAR PROSTHESES PROTECTIVE GARMENTS SPINNING TEXTILES TREATMENT OF TEXTILES OR THE LIKE TREATMENT OR PROTECTION OF EYES OR EARS TRIMMINGS WADDING WEARING APPAREL
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Beschreibung
Zusammenfassung:	A barrier fabric having stretch and recovery properties and a method of producing are disclosed. The method includes the steps of heating at least one nonwoven web containing meltblown non-elastic thermoplastic polymer fibers to a temperature at which the peak total energy absorbed by the nonwoven web of meltblown fibers is at least about 250 percent greater than the amount absorbed by the nonwoven web of meltblown fibers at room temperature; applying a tensioning force to neck the heated nonwoven web; and cooling the necked nonwoven web so that the nonwoven web has at least the same hydrostatic head and/or particulate barrier properties as the nonwoven web before necking. Also disclosed is a stretchable barrier fabric composed of a nonwoven web of meltblown non-elastomeric thermoplastic polymer fibers, the nonwoven web being heat treated so that it is adapted to stretch at least about 10 percent more than an identical untreated nonwoven web of meltblown non-elastomeric thermoplastic polymer fibers. The stretchable barrier fabric is adapted to provide a hydrostatic head of at least about 20 cm and/or a particle holdout efficiency of at least about 40 percent for particles having an average size greater than 0.1 mu m. The stretchable barrier fabric may be a component of a multilayer material and may be used in disposable protective garments.