| 摘要 |
<p>1488676 Cellulose filaments; non-woven fabrics KIMBERLY-CLARK CORP 23 Sept 1974 [1 Oct 1973] 41356/74 Headings D1R and D1W A filament comprises interbonded cellulose fibres which are predominantly aligned in a direction parallel to the filament length and in which the cellulose has been chemically substituted, to increase its hydrophillic character, by etherization or esterification, possibly with cross linking, or by polymeric grafting. The fibres may be so formed and/or arranged as to produce capilling channels in the filament. The chemically substituted cellulose fibres comprises phosphenylated wood pulp, phosphenylated cotton linters, cross linked carboxymethyl cellulose or hydrolyzed acrylonitrile grafted cellulose. The filament may comprise a blend of such fibres. To form the filament, spruce pulp may be phosphenylated, refined, swollen, dewatered, extruded and dried. Immediately after drying the fibres are swollen, and interbonded by their gel-like outer surface. The subsequent collapse of the fibres is said to leave capillary channels in the filament. The drying may take place by solvent exchange and evaporation. To form a web, the filaments may be directed onto a moving screen which carries them into a solvent bath, the filaments becoming bonded where they cross. The filaments or webs may be incorporated as an absorbent layer in a tampon, wipe, disposable diaper or sanitary napkin.</p> |
