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Sarvas M, Pavlenda P, Takacova E Effect of hydrogel application on survival and growth of pine seedlings in reclamations. A hardwood kraft wood pulp may also be used. A diaper article according to claim 33 wherein, for said polymer particles, the relationship between gel volume, v, and equilibrium extractable polymer. The reaction mixture must furthermore be substantially free of graft polymerizable polymer moieties such as starch or cellulose. Utilization of such relatively low monomer concentrations is believed to be one factor which serves to minimize the extractable polymer content of the resulting hydrogel-forming polymer materials. The liquid- impermeable backing material 12 may be made from a commercially available polyolefin film and the liquid-permeable bodyside facing material 14 may be made from a commercially available nonwoven material, such as a spunbonded or carded fibrous web which is wettable and capable of passing urine. AUC en. Such absorbent structures can be incorporated into absorbent articles such as disposable diapers, adult incontinence pads, sanitary napkins and the like. The contents of the latter flask were added dropwise over a period of one-half hour to the aforementioned four-neck flask, after which reaction was carried out at 65° C. Polymer 46 25 — Four hundred fifty parts of doubly distilled water, 92 parts of acrylic acid, and 0. The AUL is expressed as the amount in milliliters of an aqueous sodium chloride solution 0. Curr Appl Phys 5 5 — The fluid volume per insult 60 ml is divided by the time elapsed between initial fluid contact and disappearance beneath the absorbent surface to determine the fluid intake rate.

Patent 4,, to Obayashi et al. Accordingly, the superabsorbent material can only absorb the liquid if the superabsorbent is capable of performing work sufficient to overcome the restraining force. The density of the composite 16 should be in the range of about 0. J Polym Sci 5 79 — After the purge period, the stirring rate was increased slightly, and the solution temperature was equilibrated with that of an exterior cooling bath at 12° C. A truncated conical upper element having the same projected surface area as the area of the lower circular plate is positioned above the circular lower plate. It is a further object of the present invention to provide a process for preparing such improved hydrogel-forming polymer compositions. Such monomer concentrations are generally somewhat below those which have heretofore been commonly utilized to prepare hydrogel-forming polymers of the same general type as those of this invention. Therefore the use of particles having a smaller size distribu­tion outside the appropriate specified range does not provide a sufficient opportunity for the particles to perform work against a restraining force.

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It is, in fact this "preferred" class of hydrogel-forming polymers which can be prepared in accordance with the particular novel polymer preparation process hereinafter described. Additionally, the porous matrix may be formed from meltblown synthetic fibers such as polyethylene, polypropylene, polyesters, copolymers of polyesters and polyamides, and the like. Separately, in a flask, Int J Pharm — Inorganic materials and polysaccharides, which can gel fluids upon manipulation of solutions, are not superabsorbents unless they can generate a gel when simply exposed to the fluid. Two or more different monomer types of the hereinbefore described acid group-containing monomers may be copolymerized in order to provide hydrogel-forming polymer material of this requisite acid group-containing monomer content. For the purposes of this application the ability of a super­absorbent material to swell under an applied force and thereby perform work is quantified as the Absorbency Under Load or AUL. When the superabsorbent material of the present invention has a dry size within the defined ranges and does not break apart into smaller units when wetted, it will, upon swelling, generally expand such that it maintains a capillary structure in the matrix. Absorbent polymer compositions having high sorption capacities under an applied pressure. Sample dimensions, weight and density profile of the sample, amount of composite per sample, as well as the facing and backing materials, must be controlled as appropriate to obtain valid results. Ref country code : IT. Four hundred fifty parts of doubly distilled water, 92 parts of acrylic acid, and 0. These diapers are tested by panels of fifty mothers over a ten-day period in comparison with a control diaper which is a commercially marketed disposable diaper product containing no absorbent hydrogel-forming polymer. Such fiber separation improves both the wicking and absorbent capacity of such absorbent structures. Waste solution solidifying agent, process for preparing the same and use of the same.

Cellulose-Based Hydrogel for Personal Hygiene Applications | SpringerLink

• Absorbent structures containing thermally-bonded stiffened fibers and superabsorbent material.
• This invention relates to improved hydrogel-forming polymer compositions and to a process for their preparation.
• Patent 4, to Obayashi et al.

Personal hygiene product is an inseparable part of urban society. It has given comfort, reliability, 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 capacity of petrochemical-based superabsorbent 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. It is also naturally occurring long chain polymer that plays a vital role in food cycle in animal kingdom. Besides this cellulose, its derivatives have large application in various fields. As cellulose and its etherified and esterified derivatives have attractive physicochemical and mechanical properties, hydrogels synthesized from cellulose and its derivative can be alternative to synthetic superabsorbent polymer. Cellulose-based hydrogels have found application in various fields like agriculture, biomedical, tissue engineering, wound dressing, pharmaceuticals, etc. Among various applications, some products are available in the market, and some are in research level. Due to fast swelling and other extraordinary properties i. In this chapter, history of using superabsorbent in hygiene product, brief discussion on hydrogel synthesis, health and environment risk related to non-cellulosic absorbent materials, suitability of cellulose-based hydrogels over available acrylate hydrogels, and recommendation for development have been discussed. This is a preview of subscription content, log in via an institution. Book Google Scholar. Green Chem 8 5 — Article Google Scholar.

Year of fee payment : 4. Year of fee payment : 8. Year of fee payment : Effective pampers and tampons hydrogels : 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.

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

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The contents of the flask were stirred gently while being purged with argon through a submerged dispersion tube for 1 hour at 25° C. Eur J Pharm Sci 46 5 — J Sci Eng —

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