youpampers and tampons hydrogelsrather valuable piece

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. At this time the reaction mixture was heated at 40° C. More preferably, the novel polymer materials herein have a gel volume of from about 25 to 80 grams of synthetic urine per gram of hydrogel-forming polymer. High surface area material blends for odor reduction, articles utilizing such blends and methods of using same. Kind code of ref document : B1. Such hydrogel-forming polymers are those which, upon contacting fluids i. Such systems are formed by combining the foregoing peroxygen compounds with reducing agents such as sodium bisulfite, L-ascorbic acid or ferrous salts. Prior art hydrogel synthesis procedures, for example those disclosed in the hereinbefore referenced U. Polymerization conditions under which the aqueous reaction mixture herein. The hydrogel formed from this material has a hear modulus of 1. Various types of hydrophilic fiber material can be used in the absorbent structures of this invention.

When a portion of the neutralized rubbery particles was directly dried under high vacuum at 80° C. ZAB en. Any type of hydrophilic fiber which is suitable for use in conventional absorbent products is also suitable for use in the absorbent structures herein. The fibers of the matrix are generally hydrophilic or rendered hydrophilic through a surface treatment. Examples of absorbent articles include disposable diapers, sanitary napkins, incontinence pads, paper towels, facial tissues, and the like.

Publication types

Public reference made under article 3 epc to a published international application that has entered the european phase. Of all of these types of cross-linking agents, the most preferred for use herein are the di- or poly-esters of unsaturated mono- or polycarboxylic acids with polyols, the bisacrylamides and the di- or triallyl amines. Absorbency values below this range indicate the need to adjust the amount of hydrogel-forming polymer used to prepare the gel suspension. Exactly 40 ml of filtrate is placed into a clean ml round-bottomed flask, and the solution is concentrated on a rotary evaporator water aspirator vacuum, bath temperature 55° C. Ref country code : BE. Liquid absorbing thermoplastic materials and the utilization thereof in absorbent articles. In the first place, the hydrogel-forming polymer compositions herein must have an initial extractable polymer content, i. This is probably one of the first suggestions in the literature for the use of synthetic polymers in gelling absorbing aqueous body fluids. Gel strength relates to the tendency. It should be noted that the foregoing optional non-acid monomers include only those monomers which will copolymerize with the essential acid-containing monomers used to prepare the hydrogel-forming polymers herein. EPB1 en. The topsheet and the backsheet are placed at opposite sides of the absorbent structure. Aqueous-liquid and blood-absorbing powdery reticulated polymers, process for producing the same and their use as absorbents in sanitary articles.

Hydrogels: a journey from diapers to gene delivery

• The AUL is thought to be a function of the following factors; 1 gel stiffness while swelling, 2 ability to imbibe the fluid by osmotic and internal electrostatic repulsion forces, 3 surface wettability of the superabsorbent material, and 4 pampers and tampons hydrogels size distribution when wetted.
• Absorbent or gelling polymers are actually much older.
• Positioned on the top of the backing sheet is an hourglass-shaped absorbent core comprising the absorbent structure of the present invention.
• The absorbent composite according to claim 5, wherein the composite comprises superabsorbent material in an amount of from about 10 to about 60 weight percent, based on total weight of the absorbent composite.
• Process of making absorbent structures and absorbent strutures produced thereby.
• Thus, the aqueous reaction mixture should contain no materials such as starch or cellulose which are two polysaccharides typically used to prepare some types of known hydrogel-forming polymer materials.

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.

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, pampers and tampons hydrogels. The hydrogels swell and imbibe body fluids in the presence of hydrophilic functional groups in the polymeric backbone. Current pampers and tampons hydrogels of using acrylate-based superabsorbent in hygiene products is creating significant portion of urban garbage.

Pampers and tampons hydrogels. Hydrogels: a journey from diapers to gene delivery

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The drawing submitted herewith represents a cutaway view of a disposable diaper which is a preferred configuration for the absorbent articles herein. Tabata Y Biomaterial technology for tissue engineering applications. DET2 en.