Salt-sensitive binders for nonwoven webs and method of making same

摘要

A water soluble salt sensitive binder polymer particularly useful in binder solutions for fibrous webs. The polymer is a copolymer containing carboxylic acid monomer units and ethylenically unsaturated monomer units, prepared by emulsion-polymerizing the copolymer and then neutralizing the copolymer with base to make it water soluble. The binders provide a higher wet strength in concentrated salt solutions than in deionized water, and are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like.