NONWOVEN SHEET PRODUCTS MADE FROM PLEXIFILAMENTARY FILM FIBRIL WEBS

This invention relates to improved sheet products and specifically to improved nonwoven sheet products made from highly oriented plexifilamentary film-fibril webs. The improved sheet products have high opacity and strength with a much wider range of porosity or Gurley Hill Porosity Values. In partic...

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Bibliographische Detailangaben
Hauptverfasser:	LIM, HYUN, S, RATY, R., GAIL, MILONE, MICHAEL, P, FRANKE, RALPH, A, MARSHALL, LARRY, RAY, VAIDYANATHAN, AKHILESWAR, G
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 MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS NON-WOVEN FABRICS PHYSICS TESTING TEXTILES TRIMMINGS WADDING
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Beschreibung
Zusammenfassung:	This invention relates to improved sheet products and specifically to improved nonwoven sheet products made from highly oriented plexifilamentary film-fibril webs. The improved sheet products have high opacity and strength with a much wider range of porosity or Gurley Hill Porosity Values. In particular, sheet products made in accordance with the present invention have considerably higher Gurley Hill Porosity Values than similar weight sheet products subject to the same finishing treatments in accordance with prior known sheet materials. Similarly, sheet products made in accordance with the present invention can be made which have much lower Gurley Hill Porosity Values than prior sheet materials. The invention includes numerous methods and data characterizing the webs and sheets that form the improved sheet materials.