Water-dispersible ionic polyurethane binder for nonwoven...

Details Water-dispersible ionic polyurethane binder for nonwoven... Water-dispersible ionic polyurethane binder for nonwoven...

D - Textiles, Paper

04

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154/115, 2/132,

D04H 1/58 (2006.01) A61L 15/26 (2006.01) D21F 7/08 (2006.01)

Patent

CA 1053993

Abstract of the Disclosure A binder for nonwoven fabrics is provided comprising a cationic polyurethane having an ionic charge density sufficient to render the fabric dispersible in aqueous solutions of rela- tively low ionic strength yet resistant to body fluids. The water- dispersible nonwoven fabrics comprise one or more layers of sub- stantially uniformly laid fibers bound with the cationic poly- urethane; exhibit good tensile strength in the presence of body fluids such as urine, blood and menstrual fluid; and can be incor- porated in body fluid-retaining products such as sanitary napkins, disposable diapers, surgical dressings and the like. Binders containing condensation residues of a polyisocyante with an aliphatic polyester polyol are biodegradable. -1-

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