Synthetic Resin Patents (Class 604/372)
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Patent number: 7838155Abstract: The present invention relates to an aqueous electrolyte solution absorber including an aqueous electrolyte solution absorbent polymer obtained by introducing a hydrophilic polar group to a water insoluble polymer and a material to be sucked. The aqueous electrolyte solution absorber is produced by filling a water permeable bag type member with the aqueous electrolyte solution absorbent polymer obtained by introducing the hydrophilic polar group to the water insoluble polymer and a material to be sucked. The aqueous electrolyte solution absorber is inexpensive and has a high safety, a broad applicable range and a good handling property upon transportation or storage. Thus, a large amount of aqueous electrolyte solution absorbers can be rapidly conveyed at one time even to a risky place where persons are endangered to convey the absorbers.Type: GrantFiled: August 5, 2005Date of Patent: November 23, 2010Assignee: Sony CorporationInventors: Yasuhito Inagaki, Haruo Watanabe
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Publication number: 20100292664Abstract: The present invention relates to a garment comprising a composite fabric comprising a porous fluid drainage layer and a fibrous fluid barrier layer of a flash spun polyolefin plexifilamentary film-fibril sheet wherein the fibrous fluid barrier layer faces the interior of the garment.Type: ApplicationFiled: May 10, 2010Publication date: November 18, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventor: Robert Anthony Marin
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Publication number: 20100280473Abstract: An absorbent article such as a diaper, panty diaper, panty liner, a sanitary napkin, an incontinence protection or the like, having in this order a liquid-permeable coversheet, optionally at least one further layer of a web or foam material, optionally an absorbent layer, and a liquid-impermeable coversheet, characterized in that at least one part of this absorbent article has a polymer that is hydrophilic when dry, but shows a reduced hydrophilicity upon wetting; and to the corresponding liquid-permeable or -impermeable coversheet and web or foam material.Type: ApplicationFiled: October 5, 2005Publication date: November 4, 2010Applicant: SCA Hygiene Products ABInventors: Shabira Abbas, Carolyn Berland
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Patent number: 7825169Abstract: A water-absorbent composition includes: a specific plant extract; a water-absorbent resin whose surface portion and/or periphery thereof is treated; and/or a water-absorbent resin having a specific property. Specifically, it is preferable to use a water-absorbent resin having three characteristics: (1) a specific neutralization rate, (2) a specific particle diameter, and (3) a specific plant extract. The water-absorbent composition has a superior deodorant performance and an absorbent characteristic when the water-absorbent composition is used (provided) in an absorbing product such as a paper diaper, thereby providing a superior deodorant performance and a superior absorbent characteristic to the foregoing absorbing product.Type: GrantFiled: May 30, 2003Date of Patent: November 2, 2010Assignee: Nippon Shokubai Co. Ltd.Inventors: Katsuyuki Wada, Hiroko Ueda, Kunihiko Ishizaki, Yoshio Irie, Yasuhisa Nakashima
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Publication number: 20100262097Abstract: A delivery device for a sanitary article includes an encapsulating material with a first layer and a second layer, enclosing an additive in a space formed by these layers of encapsulating material. The delivery device also includes a third layer, positioned above the second layer of encapsulating material. The third layer extends beyond and thereby covers substantially all of the edges of the second layer of encapsulating material. The third layer may also extend into and throughout the space formed between the first and second layers of encapsulating material that enclose the additive. The third layer thereby protects the user of a product comprising the delivery device from contact with the edges of the second layer of encapsulating material and also provides a means for attaching the delivery device to an article to keep it in place during transport storage and use. The invention also relates to sanitary articles, such as hygiene tissues and absorbent articles, containing the delivery device.Type: ApplicationFiled: November 2, 2006Publication date: October 14, 2010Applicant: SCA Hygiene Products ABInventors: Jenny Hildeberg, Anna Klinte Olsson, Ulrika Husmark, Dennis Dahl
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Publication number: 20100256584Abstract: The embodiments provide an absorbent garment, such as a disposable diaper, incontinent pad, sanitary napkin, and the like, that has an absorbent core that provides for a long term dryness profile. The dryness profile reflects real world long term usage of absorbent products. Such new absorbent garments can be constructed with absorbent cores containing synthetic fibers and super absorbent particulates.Type: ApplicationFiled: April 1, 2009Publication date: October 7, 2010Inventor: John D. Litvay
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Publication number: 20100228213Abstract: An absorbent article such as a diaper, panty diaper, panty liner, sanitary napkin or incontinence protection, wherein at least one part of this absorbent article has a pattern of at least one hydrophilic and at least one hydrophobic region wherein the at least one hydrophilic region and/or the at least one hydrophobic region are present as a coating on the part of the absorbent article. The coated part is preferably a liquid-permeable topsheet.Type: ApplicationFiled: October 5, 2005Publication date: September 9, 2010Inventors: Carolyn Berland, Shabira Abbas
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Publication number: 20100228211Abstract: An absorbent article, preferably a disposable absorbent article such as a diaper, is disclosed that provides an improved immobilization of absorbent polymer material when the article is fully or partially urine loaded. This absorbent core is useful for providing an absorbent article of increased wearing comfort.Type: ApplicationFiled: May 18, 2010Publication date: September 9, 2010Inventors: Uwe Jurgen Becker, Ludwig Busam, Bruno Johannes Ehrnsperger, Torsten Lindner, Siegfried Link, Volker Maier, Sanaul Kabir Siddiquee, Gabriele Stiehl, Thomas Tombuelt
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Publication number: 20100228214Abstract: The present invention relates to the use of a polypropylene mixture for the production of a spunbonded non-woven fabric having increased elastic property, wherein the polypropylene mixture substantially comprises a first homopolypropylene and a second homopolypropylene, wherein an MFR of the first homopolypropylene is greater than an MFR of the second homopolypropylene, wherein the second homopolypropylene has a weight proportion in the polypropylene mixture of at least 3% by weight to a maximum of 25% by weight, wherein the first homopolypropylene is substantially the remaining weight proportion of the polypropylene mixture, wherein the second homopolypropylene has an MFR between 0.7 and 14 g/10 min (230° C./2.16 kg) according to ISO 1133, and a difference of the MFR of the second homopolypropylene to the MFR of the first homopolypropylene is at least 10 g/10 min, and an upper limit of the MFR of the first homopolypropylene is 55 g/10 min (230° C./2.16 kg) according to ISO 1133.Type: ApplicationFiled: February 25, 2010Publication date: September 9, 2010Inventors: Steffen Bornemann, Markus Haberer, Helmut Hartl
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Patent number: 7786032Abstract: The present invention is generally directed to adhesive compositions comprising selected ratios of crystalline and amorphous polymers. In some versions of the invention, polymers capable of existing in different configurations (e.g., a polymer such as polypropylene which can exist in an atactic, syndiotactic. or isotactic configuration) is used to prepare adhesives of the present invention. As an example, a selected amount of isotactic polypropylene is blended with a selected amount of atactic polypropylene to prepare an adhesive composition having one or more performance properties (e.g., bond strength) that are superior to the performance properties of a conventional hot-melt adhesive.Type: GrantFiled: September 16, 2008Date of Patent: August 31, 2010Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Peiguang Zhou, Timothy James Blenke
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Publication number: 20100198178Abstract: The embodiments provide an absorbent garment that has an absorbent core that provides for both good leakage and dryness performance. Absorbent garments having a pulpless synthetic core have comparable functionality when compared to more costly absorbent garments having an absorbent core comprising conventional amounts of fluff pulp. The absorbent garments of the embodiments incorporate features that provide good leakage performance and rewet values, while costing considerably less.Type: ApplicationFiled: February 4, 2009Publication date: August 5, 2010Inventor: John D. Litvay
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Patent number: 7767878Abstract: A disposable absorbent article includes an absorbent mat between a liquid-permeable top sheet and a liquid-impermeable back sheet. The absorbent mat includes a sheet-shaped water-absorbent layer that contains a water-absorbent resin powder but that does not contain pulp fibers; and a fiber assembly layer that contains a water-absorbent resin powder and pulp fibers in this order from a top sheet side. The sheet-shaped water-absorbent layer includes a plurality of water-absorbent resin presence regions in each of which the water-absorbent resin powder is wrapped; and a plurality of water-absorbent resin powder absence regions each being formed between the two adjacent water-absorbent resin powder presence regions.Type: GrantFiled: March 12, 2004Date of Patent: August 3, 2010Assignee: Livedo CorporationInventor: Taichiro Suzuki
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Patent number: 7717893Abstract: An absorbent article comprising at least one topsheet; a liquid impervious backsheet joined with the topsheet; an absorbent core interposed between the topsheet and backsheet; and a slow recovery elastomer. The slow recovery elastomer exhibits a normalized unload force at 37° C. of greater than about 0.04N and at least about 20% post elongation strain at 22° C. after 15 seconds of recovery.Type: GrantFiled: June 3, 2005Date of Patent: May 18, 2010Assignee: The Procter & Gamble CompanyInventors: Bryn Hird, Robin Lynn McKiernan, Edward Joseph Urankar, Janet Neton, Mattias Schmidt, Joerg Mueller
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Publication number: 20100114049Abstract: Bulging that occurs due to swelling of superabsorbent resin in an absorbent article is suppressed. The present invention includes an absorbent article including an absorbent body material including an accumulated absorbent fiber and a superabsorbent resin, wherein the absorbent body material includes interspersed interspersed sections that are interspersed, and a densely gathered state of the absorbent fiber in the interspersed sections is less dense than a densely gathered state of the absorbent fiber in areas surrounding the interspersed sections, and an occupied volume ratio of the superabsorbent resin in the interspersed sections is higher than an occupied volume ratio of the superabsorbent resin in the areas surrounding the interspersed sections.Type: ApplicationFiled: March 21, 2008Publication date: May 6, 2010Applicant: UN-CHARM CORPORATIONInventors: Yuki Noda, Kenichiro Kuroda, Kumiko Nishikawa
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Publication number: 20100114050Abstract: An absorbent material formed at least in part of a crosslinked polymer. The absorbent material has a centrifuge retention capacity as determined by a Centrifuge Retention Capacity Test of at least about 20 g/g and a gel bed permeability under load as determined by a Gel Bed Permeability Under Load Test of at least about 300×10?9 cm2 or a free swell gel bed permeability as determined by a Free Swell Gel Bed Permeability Test of at least about 2,500×10?9 cm2. The crosslinked polymer may comprise either at least about 75 weight percent anionic polymer or at least about 75 weight percent cationic polymer. In one embodiment, the cross-linked polymer is surface treated with a water soluble non-cross-linked polymer having a potential for becoming charged opposite that of the cross-linked polymer.Type: ApplicationFiled: December 11, 2009Publication date: May 6, 2010Inventors: Jian Qin, Xiaomin Zhang, Debra Ann Graverson
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Publication number: 20100100066Abstract: A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.Type: ApplicationFiled: October 20, 2008Publication date: April 22, 2010Inventors: Michael M. AZAD, Scott J. Smith, Mark Joy, Geoffrey Wyatt Blake, Michael S. Jarman
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Patent number: 7696401Abstract: An absorbent material formed at least in part of a cross-linked polymer. The absorbent material has a centrifuge retention capacity as determined by a Centrifuge Retention Capacity Test of at least about 20 g/g and a gel bed permeability under load as determined by a Gel Bed Permeability Under Load Test of at least about 300×10?9 cm2 or a free swell gel bed permeability as determined by a Free Swell Gel Bed Permeability Test of at least about 2,500×10?9 cm2. The cross-linked polymer may comprise either at least about 75 weight percent anionic polymer or at least about 75 weight percent cationic polymer. In one embodiment, the cross-linked polymer is surface treated with a water soluble non-cross-linked polymer having a potential for becoming charged opposite that of the cross-linked polymer.Type: GrantFiled: July 31, 2003Date of Patent: April 13, 2010Assignee: Evonik Stockhausen, Inc.Inventors: Jian Qin, Xiaomin Zhang, Debra Ann Miller
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Patent number: 7662460Abstract: A flexible absorbent sheet material containing an acidic water-absorbing resin, a basic water-absorbing resin, and a plasticizer, and its method of manufacture, are disclosed. The sheets contain about 60% to 100% by weight of the acidic and basic water-absorbent resin and plasticizer. The absorbent sheets have unexpected flexibility and structural integrity, while exhibiting exceptional water absorption and retention properties.Type: GrantFiled: April 29, 2003Date of Patent: February 16, 2010Inventors: Norbert Herfert, Michael A. Mitchell, Friedrich Engelhardt
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Publication number: 20100030171Abstract: A composite article comprises a fluid transport layer, a fluid retentive layer, and, optionally, a moisture vapor permeable film. The first surface of the fluid transport layer provides a fluid contacting surface. The fluid retentive layer is positioned so that the first surface layer of the fluid retentive layer is adjacent to the second surface of the fluid transport layer. The moisture vapor permeable film is positioned so that it is adjacent to the second surface of the fluid retentive layer. The composite article is suitable for use as a wound dressing.Type: ApplicationFiled: July 2, 2009Publication date: February 4, 2010Inventors: T. Andrew Canada, Martin E. Cowan, Robert M. MacMeccan, Le Zhang
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Publication number: 20100010462Abstract: Provided is a further improved wound dressing suitable for a method for treating a wound while maintaining a moist environment created by exudate oozing from the wound. The wound dressing (5) comprises at least three layers including a first layer, a second layer and a third layer in order from the side used in contact with a wound site, which layers are integrally stacked together. The first layer (1) comprises a resin sheet material having a number of pores penetrating in a thickness direction. The second layer (2) comprises a sheet material of which the surface is water-repellent and becomes water-permeable when pressure is applied. The third layer (3) comprises a sheet material capable of absorbing and holding water. The wound dressing optionally comprises a fourth layer comprising a resin film, a fabric or a nonwoven.Type: ApplicationFiled: May 25, 2007Publication date: January 14, 2010Inventor: Shuhei Kurata
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Publication number: 20090318884Abstract: The present disclosure relates to improved absorbent structures containing water-absorbing material that is immobilized with a matrix material and by use of a coating or partial coating of an immobilization enhancing component on the water-absorbing polymeric particles. This also relates to the use of an immobilization enhancing component in an absorbent structure including an absorbent component that includes a water-absorbing material and a matrix material. The absorbent structure is suitable, for example, as absorbent core in an adult incontinence article, infant (baby, toddler) diapers, including training or pull-on pants, and feminine hygiene article, such as sanitary napkins.Type: ApplicationFiled: June 4, 2009Publication date: December 24, 2009Inventors: Axel Meyer, Robin Lynn McKiernan, Jean-Phillippe Marie Autran
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Patent number: 7632764Abstract: The present invention is generally directed to adhesive compositions comprising selected ratios of crystalline and amorphous polymers. In some versions of the invention, polymers capable of existing in different configurations (e.g., a polymer such as polypropylene which can exist in an atactic, syndiotactic. or isotactic configuration) is used to prepare adhesives of the present invention. As an example, a selected amount of isotactic polypropylene is blended with a selected amount of atactic polypropylene to prepare an adhesive composition having one or more performance properties (e.g., bond strength) that are superior to the performance properties of a conventional hot-melt adhesive.Type: GrantFiled: October 18, 2006Date of Patent: December 15, 2009Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Peiguang Zhou, Timothy James Blenke
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Patent number: 7629501Abstract: A reusable diaper generally includes an inner layer configured to wick moisture from a diaper wearer's body and an outer layer configured to be substantially liquid-impervious. At least one pocket is defined generally by a space between the inner and outer layers. The at least one pocket is configured to receive at least one liquid-absorbent insert therein. The diaper also includes at least one slit in the inner layer that provides access into the space between the inner and outer layers defining the at least one pocket. At least one flap is provided that is positionable in an open configuration in which the at least one slit is exposed and allows access into the at least one pocket, and a closed configuration in which the at least one flap substantially covers the at least one slit.Type: GrantFiled: September 8, 2006Date of Patent: December 8, 2009Inventors: Jennifer Lynn Labit, James Andrew Labit
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Publication number: 20090287175Abstract: An absorbent article including a cover layer, a barrier layer and an absorbent system arranged between the cover layer and the barrier layer, the absorbent article being drapeable and possessing the absorbency attributes required of a sanitary napkin.Type: ApplicationFiled: July 27, 2009Publication date: November 19, 2009Inventors: Leonard G. Rosenfeld, Hien V. Nguyen
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Publication number: 20090275906Abstract: An absorbent article such as a diaper, panty diaper, panty liner, sanitary napkin or incontinence device, wherein at least one part of the absorbent article carries a film having at least one monomolecular layer of a polymer having a functional group and an active agent, in particular to an absorbent article wherein the film is obtainable by layer-by-layer deposition of at least a first polymer having a first functional group and a second polymer having a second functional group capable of interacting with the first functional group. Moreover, the use of a film obtainable by the layer-by-layer deposition of at least one first polymer having a first functional group and a second polymer having a second functional group capable of interacting with the first functional group for releasing an active agent contained in the film upon wetting of the film by body fluids.Type: ApplicationFiled: October 5, 2005Publication date: November 5, 2009Applicant: SCA HYGIENE PRODUCTS ABInventors: Carolyn Berland, Shabira Abbas
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Patent number: 7588822Abstract: A method of surface cross-linking superabsorbent polymer particles using UV irradiation is provided. The superabsorbent polymer particles for use in the method have a relatively high degree of neutralization. Brønsted acids are selectively applied onto the surface of the superabsorbent polymer particles to selectively facilitate a relatively high number of protonated carboxyl groups at the surface of the superabsorbent polymer particles while the relatively high degree of neutralization in the core of the superabsorbent polymer particles remains substantially unaffected.Type: GrantFiled: August 23, 2006Date of Patent: September 15, 2009Assignee: The Procter & Gamble Co.Inventors: Andreas Flohr, Torsten Lindner, Yoshiro Mitsukami
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Publication number: 20090192481Abstract: The present invention relates to absorbent articles that include absorbent compositions which exhibit swelling, deswelling, and reswelling behavior. More specifically, absorbent compositions of this invention swell and absorb fluids after exposure to aqueous fluids, deswell and release fluids from the swollen absorbent compositions, and can also reswell and absorb fluids. The swelling-deswelling-reswelling behavior allows enhanced liquid distribution in absorbent composites and absorbent articles.Type: ApplicationFiled: June 30, 2008Publication date: July 30, 2009Inventors: Richard N. Dodge, II, Jian Qin, Scott J. Smith, Gonglu Tian, Yaru Shi
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Publication number: 20090177174Abstract: An absorbent composite comprising: a base material and water-absorbent resin particles; wherein the following conditions (1) to (4) are fulfilled: (1) the weight ratio of water-absorbent resin relative to the total weight of the base material and water-absorbent resin is 65 to 99 wt %, (2) the water-absorbent resin particles adhering directly to the base material constitute 50 wt % or more of the total water-absorbent resin particles; (3) the average absorption capacity of the water-absorbent resin particles is 50 g/g or more; and (4) the amount of residual monomers in the water-absorbent resin is 200 ppm or less.Type: ApplicationFiled: May 12, 2006Publication date: July 9, 2009Applicant: ASAHI KASEI CHEMICALSInventors: Tsutomu Akiyama, Tamotsu Kodama, Masataka Nishi, Hiroshige Okamoto
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Publication number: 20090171308Abstract: An absorbent structure formed from a process of providing water-swellable material that includes water-swellable polymer particles, which are coated with a coating agent. The coating agent is a phase-separating elastomeric material that has a first and second glass transition temperature. The coated water-swellable polymer particles are able to swell without breakage of the coating.Type: ApplicationFiled: March 5, 2009Publication date: July 2, 2009Applicant: The Procter & Gamble CompanyInventors: Renae Dianna Fossum, Mattias Schmidt, Axel Meyer
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Patent number: 7528291Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The color-stable superabsorbent polymer is prepared in the essential absence of a persulfate, and is subjected to a low dose of ultraviolet radiation. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.Type: GrantFiled: March 19, 2004Date of Patent: May 5, 2009Assignee: BASF AktiengesellschaftInventors: Norbert Herfert, Michael M. Azad, Peter W. Carrico
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Patent number: 7504551Abstract: A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.Type: GrantFiled: March 19, 2004Date of Patent: March 17, 2009Assignee: BASF AktiengesellschaftInventors: Norbert Herfert, Michael M. Azad, Peter W. Carrico, Guy Thomas Woodrum, Michael A. Mitchell, Ma-Ikay Kikama Miatudila
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Publication number: 20090036855Abstract: Reversed phase suspension polymerization is allowed while controlling content of minor components in monomer, particularly controlling a content of acetic acid and propionic acid being not higher than 500 ppm, controlling a content of acrylic acid dimer being not higher than 1000 ppm, in acrylic acid. Cross-linked polymer obtained by the polymerization is subjected to a surface crosslinking treatment without substantially using an organic solvent, and under heating at high temperature (150° C. or higher and 250° C. or lower). Thereafter, agglomeration is carried out without substantially using an organic solvent. Accordingly, a particulate water-absorbing agent including a water-absorbing resin having superior property, and being suited for practical applications at high concentrations in absorbing cores such as a diaper and the like without generation of any odor of the organic solvent can be obtained because no volatile organic compound is included.Type: ApplicationFiled: August 5, 2005Publication date: February 5, 2009Inventors: Katsuyuki Wada, Hiroko Ueda, Teruyuki Kanto, Kunihiko Ishizaki, Motohiro Imura
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Patent number: 7479578Abstract: An absorbent core comprising fluff pulp fiber treated with polysiloxane, wherein the absorbent core has a density of about 0.15 g/cm3 or greater and a Young's modulus of about 75 psi or less. The polysiloxane may comprise an amino-functional moiety, The absorbent core may comprise superabsorbent, and may be employed in a disposable absorbent product.Type: GrantFiled: December 19, 2003Date of Patent: January 20, 2009Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Gil Bernard Didier Garnier, Elizabeth Ann Allison, Mary Alice Berceau, Troy Michael Runge
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Patent number: 7473818Abstract: A pant-like, prefastened, disposable absorbent article having side seams which include a front ear passively bonded to a back ear, wherein the front ear is releasable from the back ear desirably without tearing or damaging the back ear. The tearable front ear has a basis weight less than a basis weight of the back ear.Type: GrantFiled: December 7, 2001Date of Patent: January 6, 2009Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Paul J. Datta, Kristi Jo Bryant, Timothy J. Blenke, Stephen C. Baumgartner, Julie A. Moser, Barbara A. Gossen, Catherine Marguerite Hancock-Cook, Mark G. Everson, Peter S. Lortscher
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Publication number: 20080319408Abstract: An absorbent product has a top sheet (21), an absorbent core (22) and a back sheet. The absorbent core (22) includes 40% by weight or more of high absorbent resin powder (223) and it is possible to slim down the absorbent core (22) while keeping a sufficient amount of absorption to thereby achieve slimming down of the absorbent product. A top sheet lower part (212) contacting the high absorbent resin powder (223) in the absorbent core (22) includes hydrophilic fibers (2122) having water retention characteristics, and moisture is temporarily retained in the top sheet lower part (212) before reaching the absorbent core (22) and rapidly disperses in a range facing the absorbent core (22) of the top sheet lower part (212). As a result, it is possible to reliably absorb the moisture of excrement in the absorbent core (22) and to simplify a structure of the absorbent product.Type: ApplicationFiled: June 10, 2008Publication date: December 25, 2008Inventors: Kenichi Uchimoto, Yasuji Yasumitsu
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Publication number: 20080312623Abstract: A substantially cellulose free absorbent core comprising absorbent polymer material having a saline flow conductivity greater than about 100×10?7 cm3·sec/g and a centrifuge retention capacity of greater than about 20 g/g. A disposable absorbent article is also disclosed.Type: ApplicationFiled: June 18, 2008Publication date: December 18, 2008Inventors: Harald Hermann Hundorf, Holger Beruda, Horst Blessing, Peter Dziezok, Axel Krause, Mattias Schmidt, Lutz Stelzig
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Patent number: 7465373Abstract: An unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw liquid from the first stratum and further severs as a temporary storage stratum. Methods for forming the unitary stratified composite are also disclosed.Type: GrantFiled: May 4, 2006Date of Patent: December 16, 2008Assignee: National Institute for Strategic Technology Acquisition and CommercializationInventors: Peter A. Graef, Colin Elston, Daniel T. Bunker, Fred B. Howard, Jeffrey D. Mathews, Shahrokh A. Naieni, Charles E. Miller
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Publication number: 20080306463Abstract: Low basis weight films having a heat capacity×density value of greater than about 970,000 Ws/m3K, as measured by the method described herein, the films having a basis weight of less than about 16 gsm and comprising at least about 10% polypropyleneType: ApplicationFiled: June 5, 2008Publication date: December 11, 2008Inventors: Terra Louise Dent, Joseph Leslie Grolmes, Jeffrey Richard Holley, Yoshihiko Tachibana, Terrill Alan Young
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Publication number: 20080287901Abstract: An absorbent article 1 has an extensible absorbent member 4 and is extensible as a whole. The absorbent member 4 has three-dimensionally dispersed therein a large number of small absorbent clusters 10a or 10b containing a superabsorbent polymer 11 and fibers 12, 13, 14. The small clusters 10a or 10b are dispersively arranged in a web containing crimped fibers. The small clusters include those composed of a superabsorbent polymer particle 11 and a large number of fibers 12 adhered to the particle 11 and those composed of a helically crimped fiber 13, a superabsorbent polymer particle 11, and fibers 14, the polymer particle 11 and the fibers 14 being taken into the helix of the crimped fiber 13.Type: ApplicationFiled: January 24, 2005Publication date: November 20, 2008Inventors: Namie Itoi, Masahito Tanaka, Shinsuke Nagahara, Tetsuyuki Kigata
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Publication number: 20080234646Abstract: The present invention leads to odor-preventing water-absorbing compositions comprising at least one water-absorbing polymer and at least one substituted thiophosphoramide, to processes for their production and also to hygiene articles and their production.Type: ApplicationFiled: July 18, 2006Publication date: September 25, 2008Inventors: Volker Braig, Michael de Marco, Patrick Deck, Oliver Huttenloch, Michael Mauss
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Publication number: 20080188821Abstract: Water-absorbing polymeric particles are produced by spray polymerization of a monomer solution in a process wherein the monomer solution is spray dispensed and at least one crosslinker accumulates in the region of the droplet surface, and are useful in hygiene articles.Type: ApplicationFiled: January 14, 2006Publication date: August 7, 2008Applicant: Basf AktiengesellschaftInventors: Dennis Losch, Volker Seidl, Uwe Stueven
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Patent number: 7396585Abstract: This invention is directed to an absorbent structure comprising a solid, typically particulate, water-swellable material that comprises coated water-swellable, preferably hydrogel-forming polymers, which are coated with a coating agent, which is such that it does not rupture when the polymers swell in a liquid, e.g., water or saline water. Hereto, the coating agent is extensible in wet state and comprises thereto a wet-extensible material that has a wet-elongation of at least 400% or even at least 500%, and preferably a tensile stress at break in the wet state of at least 1 MPa. Typically, the coating agent comprises thereto an elastomeric polymeric material.Type: GrantFiled: August 5, 2004Date of Patent: July 8, 2008Assignee: The Procter & Gamble CompanyInventors: Mattias Schmidt, Axel Meyer, Renae Dianna Fossum, Stephen Allen Goldman, Edward Joseph Urankar, Bruno Johannes Ehrnsperger
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Publication number: 20080161522Abstract: The present invention relates to a process for producing water-absorbing polymeric particles by polymerizing a monomer solution, which comprises removing the polymer gel from the reactor when the gel temperature is at least 50° C. and the monomer conversion is not more than 90 mol %, and also to a process for producing hygiene articles.Type: ApplicationFiled: March 28, 2006Publication date: July 3, 2008Inventors: Ulrich Riegel, Thomas Daniel, Dieter Hermeling, Mark Elliott
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Publication number: 20080082069Abstract: An absorbent article includes a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet. At least one component of the article, such as the absorbent core, includes a superabsorbent fiber. In one aspect, the article includes substantially water-insoluble, water-swellable, non-regenerated, carboxyalkyl cellulose fibers, where the fibers have a surface having the appearance of the surface of a cellulose fiber, and where the fibers comprise a plurality of non permanent intra-fiber metal crosslinks and a plurality of temporary intra-fiber crosslinks.Type: ApplicationFiled: October 2, 2006Publication date: April 3, 2008Inventors: Jian Qin, Mengkui Luo, S. Ananda Weerawarna, James H. Wiley
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Publication number: 20080082068Abstract: An absorbent article includes a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet. At least one component of the article, such as the absorbent core, includes a superabsorbent fiber. In one aspect, the article includes substantially water-insoluble, water-swellable, non-regenerated, carboxyalkyl cellulose fibers, where the fibers have a surface having the appearance of the surface of a cellulose fiber, and where the fibers comprise a plurality of non-permanent intra-fiber metal crosslinks and a plurality of permanent intra-fiber crosslinks.Type: ApplicationFiled: October 2, 2006Publication date: April 3, 2008Inventors: Jian Qin, Mengkui Luo, S. Ananda Weerawarna, James H. Wiley
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Publication number: 20080058747Abstract: An absorbent article can have a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet. In some aspects, at least one of the topsheet, backsheet, and absorbent core is stretchable. In other aspects, the absorbent core can comprise layers, at least one of which includes substantially the superabsorbent material and at least one of which includes substantially fluff. In some aspects, the article includes superabsorbent material which has a centrifuge retention capacity of at least about 25 g/g, a free swell gel bed permeability of at least 200 Darcies, and a gel integrity of at least 2. In some aspects, the superabsorbent material is coated with a polyvinylamine.Type: ApplicationFiled: August 31, 2006Publication date: March 6, 2008Inventors: Arvinder Pal Singh Kainth, Jason Matthew Laumer, William G.-J. Chiang, Norbert Herfert, Michael A. Mitchell, Richard Keith Goodwin
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Patent number: 7317135Abstract: Disclosed is an absorbent structure comprising an acidic or basic water-swellable, water-insoluble polymer, a basic or acidic second material, and, optionally, a buffering agent, wherein the absorbent structure exhibits desirable absorbent properties. Specifically, the present invention relates to an absorbent structure having the ability to absorb a large quantity of liquid while maintaining a substantially desired and balanced pH profile on or along the upper surface of the absorbent structure. The absorbent structure is useful in disposable absorbent products, such as those disposable absorbent products that are used to absorb body liquid.Type: GrantFiled: December 22, 2005Date of Patent: January 8, 2008Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Palani Raj Ramaswami Wallajapet, Alice Y. Romans-Hess, Edwin T. Ta, Jian Qin
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Publication number: 20070219521Abstract: An absorbent article is disclosed having a topsheet, a backsheet joined with the topsheet, an absorbent core disposed between the topsheet and the backsheet, and a synthetic superabsorbent polymer derived from a first renewable resource via at least one intermediate compound, wherein said superabsorbent polymer exhibits a defined Saline Flow Conductivity value and Absorption Against Pressure value. Alternately, an absorbent article is disclosed having a synthetic polyolefin derived from a first renewable resource via at least one intermediate compound. The synthetic polyolefin exhibits defined performance characteristics making the polyolefin particularly useful in certain components of the absorbent article. Methods for making the aforementioned absorbent articles are also disclosed.Type: ApplicationFiled: March 15, 2007Publication date: September 20, 2007Inventors: Bryn Hird, Eric Ted Addington
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Patent number: 7250549Abstract: An absorbent garment includes a front body panel having a terminal waist edge and a terminal crotch edge and a rear body panel having a terminal waist edge and a terminal crotch edge. The terminal crotch edge of the rear body panel is longitudinally spaced from and forms a gap with the terminal crotch edge of the front body panel. An absorbent insert includes first and second longitudinally spaced end portions and opposite laterally spaced side edges. The absorbent insert bridges the gap between the front and rear body panels with the first and second end portions overlying and connected to the front and rear body panels respectively. At least one of the first and second end portions of the absorbent insert is connected respectively to a corresponding one of the front and rear body panels with at least first and second adhesive regions having first and second adhesive basis weights respectively.Type: GrantFiled: December 30, 2003Date of Patent: July 31, 2007Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Sandra A. Richlen, Paul Christoffel, Suzanne M. Schmoker, Paul Hasler, Sarah Freiburger, David F. Bishop, Melanie J. Milslagle
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Publication number: 20070149933Abstract: A sweat-absorbent sheet includes a first surface layer, a second surface layer lying on the opposite side of the first surface layer and an intermediate layer sandwiched between these two layers. Each of the first and second surface layers comprises a mixture layer of first and second hydrophobic fibers made of thermoplastic synthetic resin as main constituent and first and second hydrophilic fibers. The intermediate layer comprises third hydrophilic fibers extending into at least one of the first and second hydrophobic fibers. The first and second hydrophobic fibers are bonded to the crimped to hydrophobic composite fibers mixed in the respective layers. The first, second and third hydrophilic fibers are impregnated with antibacterial or bactericidal medicinal ingredient and such medicinal ingredient is left behind on these hydrophilic fibers after these hydrophilic fibers have been dried.Type: ApplicationFiled: November 13, 2006Publication date: June 28, 2007Applicant: UNI-CHARM CORPORATIONInventors: Mitsuhiro Wada, Akiko Tange, Kiyoshi Miyazawa, Chieko Toyooka