Personal Products Company

Mcneil-Ppc, Inc.

Pronoy K Chatterjee

Kambiz B Makoui

Stephen L Kopolow

Robert F Schwenker, Jr

Graham K Morbey

Absorbent retentive pulp is described which is capable of retaining good absorbency even after having been highly compressed. The pulp is produced by mixing a microfibrillated pulp slurry with a cross-linking agent followed by freeze drying.

Freeze dried, cross-linked microfibrillated cellulose

Adsorbent retentive pulp is described which is capable of retaining good adsorbency even after having been highly compressed. The pulp is produced by subjecting a microfibrillated pulp slurry to pore generation with pore generating particles and to cross-linking with a cross-linking agent.

Cross-linked microfibrillated cellulose prepared from pure generating

Absorbent retentive pulp is described which is capable of retaining good absorbency even after having been highly compressed. The pulp is produced by subjecting a microfibrillated pulp slurry to pore generation with pore generating particles and to cross-linking with a cross-linking agent.

Cross-linked microfibrillated cellulose prepared from pore generating

Absorbent, retentive pulp is described which is capable of retaining good absorbency even after having been highly compressed. The pump is produced by subjecting a microfibrillated pulp slurry to pore generation by means of freezing and solvent exchange and to cross-linking with a cross-linking agent.

Cross-linked pore containing microfibrillated cellulose prepared by

Absorbent retentive pulp, produced by mechanically treating a dispersion of cellulose fiber to the disintegrated and outer secondary walls to microfibrillar form. The beaten dispersion is then freeze dried.

Freeze dried microfibrilar cellulose

Hydrophilic, water retentive synthetic wood pulp fibers are provided which are capable of forming low density fluff. The fibers comprise polyolefins and polyvinyl alcohol wherein the polyvinyl alcohol has, grafted thereto, hydrophilic polymer moieties.

Synthetic superabsorbent fibers

An insoluble etherified cellulose graft copolymer is provided comprising etherified cellulose which is soluble in water in the absence of grafting and is chosen from the group consisting of the alkali metal salts of carboxyalkyl cellulose, sulfoalkyl cellulose and phosphonoalkyl cellulose. The etherified cellulose has grafted onto its cellulose backbone side chains of polymer moieties in sufficient quantities to render the grafted etherified cellulose insoluble. The products of this invention are used alone or mixed with other absorbent materials such as unmodified cellulose, in the manufacture of absorbent napkins, tampons, sponges and the like.

Absorbent product including grafted insolubilized cellulose ether

A selected powdery form of a graft copolymer containing hydrophilic chains provides a highly moisture-absorbent media which is suitable for use in absorbent bodies, particularly those used for absorbing body exudates such as catamenial devices, diapers, wound dressings, surgical sponges, incontinence pads and the like. The powdered form of said copolymers is useful alone or in combination with other absorbent materials in making up the absorbent bodies.

Powdered grafted cellulose

Alkali metal and ammonium salts of crosslinked phosphonoalkyl cellulose are described which have a phosphorous content of from about 1.5% to about 4.0% by weight and a degree of crosslinking sufficient to make the modified cellulose salts essentially insoluble in aqueous media. These crosslinked phosphonoalkyl cellulose salts have significantly increased fluid absorption capacities as compared to unmodified cellulose and may be incorporated alone or in combination with other absorbent materials into catamenial tampons, sanitary napkins, diapers, and like absorbent devices.

Crosslinked phosphonoalkyl cellulose and absorbent devices incorporating

An absorbent body is provided for use in such products as catamenial napkins and tampons, diapers, wound dressings and the like, which body incorporates hydrophilic, wet resilient, swellable, cellulosic fibers produced by a single reaction treatment of cellulose. The cellulose fibers are treated with an agent which renders the fibers hydrophilic while simultaneously crosslinking them with a crosslinking radical having the structure: ##EQU1## where X is chosen from the group consisting of H or COOY: Y is chosen from the group consisting of Na, K, Li, Ce or H; and k, m and n are integers ranging from 0 to 4.

Absorbent hydrophilic cellulosic product

Dry crosslinked, fibrous cellulosic absorbent material having low hemicellulose content and low knot content, the fibers being internally crosslinked for the major part and being relatively free of intercrosslinking with adjacent fibers.

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Spotswood, NJ, United States of America

Pronoy K Chatterjee