Starch fibrids useful in enhancing the physical properties of paper, and process of preparing same
AssigneeChampion International Corporation
InventorsJohn R. Hart, Stanley G. Juergens, William E. McCormack
Life of this patent
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Abstract
Starch fibrids useful in enhancing the physical properties of non-woven webs, e.g., paper, are produced by a process which comprises providing an aqueous, alkaline solution of a water-insoluble starch in a finely divided form, e.g., in the form of an aerosol, and introducing the finely divided starch solution into an agitated, aqueous precipitating medium comprising a precipitating salt to thereby produce starch fibrids characterized by having both film and fiber morphology. The starch fibrids are recovered from the salt-containing liquid and may be incorporated into paper to improve the physical properties thereof.
Claims13
A process for the production of a paper product including water insoluble starch fibrids, which comprises:
- (a) providing an aqueous, alkaline solution of a normally water-insoluble starch in finely divided form,
- (b) suspending said finely divided starch solution in a gas and introducing the resulting aerosol into an agitated, aqueous precipitating medium at an angle of less than 90 degrees with the surface of said aqueous precipitating medium, said aqueous precipitating medium comprising a salt solution, to thereby produce starch fibrids characterized by having both film and fiber morphology,
- (c) separating said starch fibrids which are insoluble in water from said aqueous precipitating medium,
- (d) incorporating said starch fibrids into a papermaking wood pulp in an amount ranging from 1 percent to about 60 percent by weight, and
- (e) preparing a paper product from said papermaking wood pulp including said starch fibrids.
A process for the production of a paper product including water insoluble starch fluids, which comprises:
- (a) providing an aqueous, alkaline solution of a normally water-insoluble starch in finely divided form, said alkaline solution of starch comprising white water effluent from a papermaking process,
- (b) introducing said finely divided starch solution into an agitated, aqueous precipitating medium, said aqueous precipitating medium comprising a salt solution, to thereby produce starch fibrids characterized by having both film and fiber morphology,
- (c) separating said starch fibrids which are insoluble in water from said aqueous precipitating medium,
- (d) incorporating said starch fibrids into a papermaking wood pulp in an amount ranging from 1 percent to about 60 percent by weight, and
- (e) preparing a paper product from said papermaking wood pulp including said starch fibrids.
Dependencies are inferred from the claim text.