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US 4,303,471 AGranted
Method of producing fluffed pulp
AssigneeBerol Kemi AB
InventorBente L. Laursen
Life of this patent
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Abstract
The invention relates to a method at the production of absorbent cellulose pulp, so-called fluff. By using certain nonionic fatty acid esters in combination with cationic retention agents, good disintegration properties of the cellulose pulp is obtained and the fluff which is obtained after dry-defibration has fast liquid absorption. The esters, which are used, are partially fatty acid esters of polyvalent alcohols, and as cationic retention agents quaternary ammonium compounds can e.g. be used.
Claims10
In the method that includes:
- forming a liquid suspension of cellulose pulp, removing a substantial portion of the liquid to form an essentially dry mass of cellulose pulp, and
- disintegrating the essentially dry mass of cellulose pulp into a fluff,
- the improvement which comprises reducing the amount of energy required to disintegrate said mass into fluff which comprises including in said liquid suspension a mixture of
- (a) a non-ionic compound in an amount sufficient to reduce the bonding forces between cellulose fibers, and
- (b) at least one cationic retention agent,
- said nonionic compound being a partial fatty acid ester of polyvalent alcohol having 2-8 carbon atoms, or an anhydride thereof, or a partial fatty acid ester of polyethylene glycol or polypropylene glycol having a molecular weight up to 500.
3 more elements
A composition for facilitating the debonding of an aqueous cellulose pulp solution comprising in combination:
- (a) a non-ionic compound in an amount sufficient to reduce the bonding forces between celulose fibers, and
- (b) at least one cationic retention agent,
- said nonionic compound being a partial fatty acid ester of polyvalent alcohol having 2-8 carbon atoms, or an anhydride thereof, or a partial fatty acid ester of polyethylene glycol or polypropylene glycol having a molecular weight up to 500.
Dependencies are inferred from the claim text.