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Low gel strength hydrogels, on the other hand, merely flow into void spaces between fibers upon fluid absorption and can thereby actually. Ref country code : IT. While these known starch-free hydrogel-forming materials can be synthesized with sufficient gel volume and gel strength characteristics to be utilized in absorbent articles, there is an additional characteristic of such materials which is unrecognized in the foregoing patents and which, in the prior art materials, tends to diminish the effectiveness of such hydrogel-forming materials as absorbents in absorbent articles. Ref legal event code : CD. In one preferred embodiment of the present invention, the porous fiber matrix is formed from cellulosic material such as wood pulp fluff. Current trend of using acrylate-based superabsorbent in hygiene products is creating significant portion of urban garbage. A more precise designation for present hydrogel-forming SAP is ionic hydrocolloid. Market sand Markets Annually published premium market research reports. The absorbent composite according to claim 1, wherein the porous fiber matrix has a density of from about 0. Personal hygiene product is an inseparable part of urban society. In the inverse emulsion polymerization or inverse suspension polymerization procedures, the aqueous reaction mixture as hereinbefore described is suspended in the form of tiny droplets in a matrix of a water-immiscible, inert organic solvent such as cyclohexane. Care should be taken to avoid subjecting the polymer material being dried to excessive elevated temperatures which tend to break cross-links and which can thereby adversely affect gel strength and extractables characteristics. A diaper article according to claim 33 wherein the absorbent core comprises an hourglass-shaped absorbent structure formed from an air-laid mixture of. Method for preparing a hydrogel through the use of alkoxydes, the product thus obtained and the use thereof. Particulate, absorbent, polymeric compositions containing interparticle crosslinked aggregates.

One minute after the initial fluid insult is imbibed, a second insult of the same size is introduced. Gel-blocking occurs when the superabsorbent material swells on contact with liquid and blocks a significant number of the capillaries present in the matrix. The polymer material formed in the reaction mixture, either before or after neutralization, can be dried by any conventional method. For sulfonic acid-based hydrogel-forming polymers, a gravimetric procedure is employed. A solution of Absorbent composition comprising hydrogel-forming polymeric material and fiber bundles.

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What is claimed is: 1. Since Blue Dextrin is excluded from the hydrogel due to its high molecular weight, this ratio is related to the measured absorbencies. J Sci Eng — These particles were dried under high vacuum at 60° C. Such high extractable materials result from the polymerization of sodium salt monomers in relatively high concentration. Correspondence to Md. Within 17 minutes, the reaction temperature had increased to 65° C. The amount of fluid passing through the sample per unit time after an equilibrium flow rate is established is proportional to the in-plane permeability which, in turn, is related to the degree of openness of the absorbent composite structure and a direct measure of the ability of the sample to conduct fluid. Treatment of the resulting rubbery particles with methanol, drying, and pulverizing by the method of Example I gave About this entry.

Cellulose-Based Hydrogel for Personal Hygiene Applications | SpringerLink

• Low gel strength hydrogels, on the other hand, merely flow into void spaces between fibers upon fluid absorption and can thereby actually.
• In one embodiment of the present invention the superabsorbent material comprises a hydrocolloid, preferably an ionic hydrocolloid.
• The hydrocolloid is a crosslinked sodium salt of poly acrylic acid.
• More preferably, the hydrogel materials formed herein have a shear modulus within the range of from about.
• Method for forming an absorbent structure having vertically orientated flow regulating walls.
• Flour polymer absorbency liquids and blood by pressing it, process for the production and use thereof in textiles for use body hygiene.

Year of fee payment : 4. Year of fee payment : 8. Year of fee payment : Effective date : The present invention relates to improved hydrogel-forming polymer compositions which can be used as absorbents in absorbent structures and absorbent articles such as diapers, sanitary napkins and the like. Such hydrogel-forming polymer compositions are substantially water-insoluble, slightly cross-linked, partially neutralized polymers which are prepared from unsaturated polymerizable, acid group-containing monomers and cross-linking agents. These hydrogel-forming polymer materials, upon imbibing fluids, form hydrogels. Such polymer materials have relatively high gel volume and relatively high gel strength as measured by shear modulus of the hydrogen which forms therefrom. Such polymer materials also contain relatively low levels of extractable polymer material which can be extracted therefrom by contact with synthetic urine. Preferred hydrogel-forming polymers having these characteristics can be prepared by polymerizing the acid group-containing monomers in their free acid form at relatively low monomer concentrations, preferably using relatively low polymerization temperatures. Absorbent structures and absorbent articles containing these dried hydrogel-forming polymer materials are also disclosed. This application is a reissue of Ser. This invention relates to improved hydrogel-forming polymer compositions and to a process for their preparation. Such hydrogel-forming polymers are those which, upon contacting fluids i. These hydrogel-forming polymer materials are useful as absorbents in absorbent structures which can be incorporated into absorbent articles such as disposable diapers, adult incontinence pads, sanitary napkins and the like. Water-insoluble hydrogel-forming polymers are materials which are capable of absorbing large quantities of fluids such as water and body waste and which are further capable of retaining such absorbed fluids under moderate pressures. These absorption characteristics of such materials make them especially useful for incorporation into absorbent articles such as disposable diapers. Harper et al; U.

Personal hygiene product is an inseparable part of urban society. It has given comfort, reliability, pampers and tampons hydrogels, and flexibility to sick people, women, and children. The hygiene items containing superabsorbent polymer hydrogels for absorbing large amount of body fluids are the attractive inventions of modern science. The hydrogels swell and imbibe body fluids in the presence of hydrophilic functional groups in the polymeric backbone. Current trend of using acrylate-based superabsorbent in hygiene products is creating significant portion of urban garbage. This pile up is not only shrinking land sites but also harming a lot to the environment due to non-degradability of superabsorbent materials existing in the core of hygiene product. In spite of high water-holding pamper 3 active baby of petrochemical-based pampers and tampons hydrogels polymer, it has a hidden curse on nature of non-degradability and health risk. Cellulose is the most abundant biocompatible matter on this earth which basically originated from plants, pampers and tampons hydrogels. It is also naturally occurring long chain polymer that plays a vital role in food cycle in animal kingdom.

Pampers and tampons hydrogels. Cellulose-Based Hydrogel for Personal Hygiene Applications

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This pile up is not only shrinking land sites but also harming a lot to the environment due to non-degradability of superabsorbent materials existing in the core of hygiene product. ARIN et al. Country of ref document : ES.

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