EVA polymers for use as beater saturants
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United States of America Patent
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Oct 15, 1996
Grant Date -
N/A
app pub date -
Apr 10, 1990
filing date -
Apr 10, 1990
priority date (Note) -
Expired
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Abstract
A beater saturation process for forming a nonwoven wet laid composite is provided which comprises the following steps: (I) providing an aqueous dispersion comprising: (a) 10 to 95% by weight of a water-dispersible, but water-insoluble fiber; (b) 0 to 80% by weight of a finely divided, substantially water-insoluble, non-fibrous, inorganic filler; (c) 5 to 50% by weight of an anionically charged emulsion polymer comprising 70 to 90% by weight of a vinyl ester of an alkanoic acid; 10 to 30% by weight ethylene, 0 to 70% by weight of a C.sub.2 -C.sub.8 alkyl acrylate, and 0 to 4% by weight of an anionic functional monomer, (II) colloidally destabilizing the resulting mixture to form a fibrous agglomerate in aqueous suspension; (III) distributing and draining the aqueous suspension on a porous substrate such as a wire to form a wet web; and (IV) drying the web.
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