High yield fiber sheets

Details High yield fiber sheets High yield fiber sheets

D - Textiles, Paper

21

C

92/52, 92/65

D21C 3/06 (2006.01) A61L 15/28 (2006.01) A61L 15/40 (2006.01)

Patent

CA 1131959

HIGH YIELD FIBER SHEETS James C. Williams ABSTRACT Wet-laid sheets of softwood high yield fibers in combination with hardwood high yield fibers. The sheets, which are strong enough to be handled by commercial equipment, are formed on conventional papermaking machines using a furnish comprising a major proportion of softwood high yield fibers in admixture with a minor proportion of hardwood high yield fibers. The hardwood high yield fibers are specially prepared by a procedure comprising treating hardwood with relatively high levels of chemicals under relative stringent conditions and defibrating the treated hardwood with relatively high levels of power input. Airfelts made from these sheets exhibit low wet densities. Processes for making the sheets and the airfelts are also pro- vided.

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