Binder for pre-moistened paper products

Details Binder for pre-moistened paper products Binder for pre-moistened paper products

C - Chemistry, Metallurgy

11

D

134/4.1

C11D 17/04 (2006.01) B32B 29/06 (2006.01) D21H 17/36 (2006.01) D21H 17/39 (2006.01)

Patent

CA 1214371

ABSTRACT OF THE DISCLOSURE A premoistened towelette or wiper type paper product having high wet strength when stored in an acidic pH medium and during usage and lower wet strength when immersed in a neutral or alka- line pH medium for disposal in conventional sewage systems com- prising a non-woven fibrous web which is treated with an improved polymeric binder comprising a copolymer of glyoxal and polyvinyl alcohol which maintains high wet strength when stored for sus- tained periods of time in acidic pH wetting medium conventionally used for external cleansing of the human body and during usage and yet which will readily break-up during flushing. This instant invention also comprises a method of treating non-woven fibrous webs with the improved glyoxalated polyvinyl alcohol copolymer binder and drying prior to wetting in an acidic, e.g. boric acid medium.

441431

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