Wet tensile strength of nonwoven webs
AssigneeAir Products Polymers, L.P.
InventorsRonald Jones, Blaine Hobar, Joel Goldstein, Lloyd Robeson
Life of this patent
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Abstract
The present invention is directed to an improvement in the wet tensile of a nonwoven web, whether the web is for a pre-moistened nonwoven wet wipe that is both safe to use and also flushes, disperses and finally biodegrades in appropriate environments or for a nonwoven web which requires high tensile strength when in contact with liquids. An improvement in the wet tensile of the nonwoven webs is achieved by incorporating a finite amount of poly(acrylic acid) into a polymeric binder system that is applied to the web.
Claims20
In a packaged pre-moistened flushable wet wipe comprising a web of nonwoven fibers bonded with a water redispersible polymeric binder in contact with an aqueous composition containing a water binding salt, the improvement which comprises:
- employing a blend of polymeric components as said water redispersible polymeric binder, said blend comprised of (on a dry weight basis):
- (a) from 65 to 85 percent by weight of a water redispersible latex polymer;
- (b) from 13 to 30 percent by weight of poly(vinyl alcohol);
- and,
- (c) from 1 to 7 percent by weight of poly(acrylic acid).
In a nonwoven product formed by bonding a web of nonwoven fibers with a water dispersible polymeric binder, the improvement which comprises:
- employing a polymeric binder composition comprised of a blend, said blend comprised of (on a dry weight basis):
- (a) from 90 to 99.9 percent by weight of a self-crosslinkable latex polymer;
- and
- (b) from 0.1 to 10 percent by weight of poly(acrylic-acid).
Dependencies are inferred from the claim text.