that wouldpampers and tampons hydrogelsapologise, but

Ref legal event code : RM. The drawing submitted herewith represents a cutaway view of a disposable diaper which is a preferred configuration for the absorbent articles herein. Given the enormous volume of raw materials which would be required for use in successfully marketed absorbent articles such as disposable diapers, it would be desirable to identify additional types of efficient hydrogel-forming absorbents which, unlike the starch resins, do not consume significant amounts of energy in their preparation and which do not depend on agricultural raw materials of potentially uncertain availability for their preparation. After minutes, the reaction temperature reached a high point of 17° C. This example illustrates a reverse suspension polymerization procedure wherein water is removed from the polymer by azeotropic distillation prior to neutralization of the polymer. To the quickly stirred solution cooled to 14° C. Springer, Cham. Absorbency values below this range indicate the need to adjust the amount of hydrogel-forming polymer used to prepare the gel suspension. Disposable absorbent article with absorbent particulate polymer material distributed for improved isolation of body exudates. Adv Drug Deliv Rev 53 3 — The hydrocolloid used in the composite had physical properties which were the same as that used in Example I. Aliquots of the hydrogel-forming polymer to be tested are swelled in i 20 parts of Synthetic Urine SU solution and ii 20 parts of Blue Dextrin BD solution. When all excess fluid had been imbibed, the resulting rubbery particles were left at 40° C. As noted hereinbefore, it is believed that polymer material extracted by body fluid once hydrogels are formed can alter both the chemical and physical characteristics of the body fluid to the extent that such fluid is more slowly absorbed and more poorly held by the hydrogel-containing absorbent article. As shown by the graphs of Figures 14, 15, and 22, whole diapers of the general configuration discussed and shown in conjunction with Figure 1, and having absorbent composites made according to the Examples indicated, were tested on infants and the percentage of leaks was determined by the ability of the diaper to contain urine without overflowing onto and soiling outer clothing.

Positioned on the top of the backing sheet is an hourglass-shaped absorbent core comprising the absorbent structure of the present invention. Ref country code : GB Ref legal event code : E. J Appl Polym Sci 60 13 — Various types of hydrophilic fiber material can be used in the absorbent structures of this invention. Pressure-resistant absorbent resin, disposable diaper using the resin, and absorbent resin, and method for production thereof. Adv Drug Deliv Rev 53 3 — Following neutralization, Ref country code : DE Payment date : Year of fee payment : Absorbent structures containing superabsorbent material and web of wetlaid stiffened fibers.

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This gap corresponds to the point at which an untruncated cone would contact the lower plate. Such hydrogel-forming polymers are those which, upon contacting fluids i. Annual fee paid to national office [announced via postgrant information from national office to epo]. Absorbent article with apertured backsheet and fibrous super absorbent material. Table A, immediately below, summarizes the percentage of leaks observed. The crosslinker a difunctional monomer is added followed by the free radical polymerization initiator. This restraint in the X-Y plane is the key feature of this test, since with a gsm. KRB1 en. As a result of these additional contacts it is not necessary for a superabsorbent fiber to meet the limitations set forth above with respect to particle size. Another portion of the neutralized gel particles prepared as in Example I before treatment with methanol was dried directly at 80° C.

Hydrogels: a journey from diapers to gene delivery

• That is, rather than expanding to fill the pores as in Figure 3, the superabsorbent expands to push the fibers apart as illustrated in Figure 4.
• Although prior art superabsorbent materials and absorbent composites made therewith have favorably exhibited the ability to freely swell with fluid and retain such fluid against an applied pressure, the benefits of this characteristic are, to an extent, illusory.
• Absorbent structures containing thermally-bonded stiffened fibers and superabsorbent material.
• Suitable cross-linking agents include, for example, 1 compounds having at least two polymerizable double bonds; 2 compounds having at least one polymerizable double bond and at least one functional group reactive with the acid-containing monomer material; 3 compounds having at least two functional groups reactive with the acid-containing monomer material; and 4 polyvalent metal compounds which can form ionic cross-linkages, pampers and tampons hydrogels.
• The amount of polymerized neutralized acid moieties e.

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. These polymers are rendered water-insoluble by cross-linking the carboxyl group-containing polymer chains using conventional cross-linking agents such as di- or poly-functional monomer materials.

Personal hygiene product is an inseparable part of urban society. It has given comfort, reliability, and flexibility to sick people, pampers and tampons hydrogels, 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 pampers and tampons hydrogels 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 capacity of petrochemical-based superabsorbent sprzedam pieluchy dada, it has a hidden curse on nature of non-degradability and health risk.

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

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Absorbent materials having improved absorbent property and methods for making the same.