Method for sizing paper

Details Method for sizing paper Method for sizing paper

1992-10-28

1993-12-21

Chin, Peter

Paper making and fiber liberation

Processes and products

With coating after drying

162158, 427395, D21H 1710

Patent

active

052718069

ABSTRACT:
A method for sizing paper to improve resistance to wetting by liquids under hard water conditions is provided. The method comprises (a) contacting paper sheet material with a hydrocarbon surfactant free, substantially organic solvent free aqueous solution of an N-alkyl fluoroaliphaticsulfonamidoalkyl phosphate salt in hard water, said phosphate salt forming substantially no precipitate and (b) drying said sheet material or (a) adding to a paper pulp slurry in hard water, a hydrocarbon surfactant free, substantially organic solvent free aqueous solution of an N-alkyl fluoroaliphaticsulfonamidoalkyl phosphate salt, said phosphate salt forming substantially no precipitate, (b) forming said slurry into paper and (c) drying said paper.

REFERENCES:
patent: 3083224 (1963-03-01), Brace
patent: 3094547 (1963-06-01), Heine
Rengel and Young, "Internal Sizing of Paper and Paperboard," Tappi monograph series No. 33, pp. 170-189 (1971).
Colbert "Fluorochemicals-Fluid Repellency for Non-Woven Substrates," Tappi, The Journal of the Technical Association of the Pulp and Paper Industry, 59, 9 (Sep. 1976).
Banks, Ed., Organofluorine Chemicals and their Industrial Application, pp. 231-234 Schwartz, "Oil Resistance Utilizing Fluorochemicals" Tappi conference prepring, 1980 Sizing Short Course, Atlanta, Ga.

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