Binder for pre-moistened paper products

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

1984-04-16

1985-08-27

Bell, James J.

Stock material or miscellaneous articles

Sheet including cover or casing

Noninterengaged fibered material encased

206812, 427342, 427391, 427421, 428290, 428511, 428913, B32B 710

Patent

active

045378070

ABSTRACT:
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 alkaline pH medium for disposal in conventional sewage systems comprising 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 sustained 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.

REFERENCES:
patent: 3438808 (1969-04-01), Hawkins et al.
patent: 4117187 (1978-09-01), Adams
patent: 4309469 (1982-01-01), Varona
patent: 4343403 (1982-08-01), Daniels et al.
R. F. Nickerson, Thickening of Poly(vinyl Alcohol) by Borate, J. Applied Polymer Science, vol. 15, pp. 111-116, (1971).
Chemical Abstracts, Poly(vinyl Alcohol) Film Containing Boric Acid for Sanitary Napkins, 97:150768y, (1982).

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