Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1995-06-06
1996-11-26
Czaja, Donald E.
Paper making and fiber liberation
Processes and products
Non-fiber additive
162163, 162183, 1621681, 210727, D21H 1733
Patent
active
055781683
ABSTRACT:
A method is provided for using an aqueous suspension of at least 15% of poly(ethylene oxide) (PEO) as a retention aid in the manufacturing of paper. PEO is dispersed in an aqueous solution of at least one salt selected from the group consisting of sodium or potassium formate, sodium or potassium hydroxide, sodium or potassium citrate, sodium or potassium acetate, sodium chloride or mixtures thereof to form a poly(ethylene oxide) suspension having at least 15% of poly(ethylene oxide) by total weigh. This suspension is dissolved in said dispersion in an aqueous system containing ferric ions or free chlorine; and said dissolved aqueous system is added to a pulp slurry for making paper just prior to forming the pulp into a wet web, whereby said aqueous suspension prevents the loss of fiber fines during the paper formation stage and resists viscosity loss due to ferric ions or free chlorine in the aqueous system.
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Burdick Charles L.
Echt Elliott
Czaja Donald E.
Edwards David
Fortuna Jos'e A.
Hercules Incorporated
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