Method for increasing wet strength cure rate of paper

Paper making and fiber liberation – Processes and products – Non-fiber additive

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162177, 162183, 162190, D21D 300, D21H 324, D21H 352

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active

040765814

ABSTRACT:
Wet-lay papermaking processes employing urea-formaldehyde resin in a papermaking slurry for imparting wet strength to the paper, are improved by addition of a water soluble salt of carboxymethylcellulose to the papermaking slurry, preferably when the urea-formaldehyde resin is dispersed in the slurry. The carboxymethylcellulose salt substantially increases the wet strength cure rate of the paper without significantly affecting the ultimate wet strength properties imparted to the paper by the cured urea-formaldehyde resin.

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patent: 3630831 (1971-12-01), Jongettes
patent: 3953638 (1976-04-01), Kemp
Casey, Pulp & Paper, vol. 2, 1960, pp. 1138, 1139 & 947.

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