Thermoplastic Patents (Class 604/370)
  • Patent number: 6452063
    Abstract: The present invention pertains to a porous, macroscopically-expanded, three-dimensional, elastomeric web suitable for use in disposable absorbent articles such as bandages, diapers and pull-up diaper training pants, as well as a method for making the web. In a preferred embodiment the web has a continuous first surface and a discontinuous second surface remote front first surface. In a preferred embodiment the elastomeric web exhibits a multiplicity of primary apertures in the first surface of the web, the primary apertures being defined in the plane of the first surface by a continuous network of interconnecting members. Each interconnecting member exhibits an upwardly concave-shaped cross-section along its length. The interconnecting members terminate substantially concurrently with one another to form a secondary aperture in the plane of the second surface of the web.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: September 17, 2002
    Assignee: The Procter & Gamble Company
    Inventors: John Joseph Curro, Anneka M. Kaminski, Michele Ann Mansfield, George Christopher Dobrin, Jianbin Zhang
  • Publication number: 20020128619
    Abstract: A laminate material (25) for a garment (10) for use in absorbing bodily wastes. The laminate material has a first layer (26), a second layer (28), and a third layer (30) intermediate the first and second layer. The first layer (26) and the second layer (28) are predominantly a polyester material having a basis weight of from 70 g/m2 to 150 g/m2, preferably from 100 g/m2 to 130 g/m2, and the third layer (30) is a microporous membrane, preferably of polyurethane.
    Type: Application
    Filed: February 20, 2002
    Publication date: September 12, 2002
    Inventors: Olle Carlbark, Kenneth Strannemalm, Peter Ronnberg, Bettina Balslev Sorensen
  • Publication number: 20020123727
    Abstract: The present invention provides a bonded cellulosic fibrous product having low creep. The product includes crosslinked cellulosic fibers and a bonding agent. Methods for forming the bonded cellulosic fibrous product and personal care absorbent products that include the bonded product are also provided.
    Type: Application
    Filed: November 14, 2001
    Publication date: September 5, 2002
    Inventors: Richard A. Edmark, Darryl T. Genest
  • Publication number: 20020123726
    Abstract: Hot-melt adhesive compositions of atactic polypropylene and isotactic polypropylene are particularly suitable for bonding non-woven elastic composites. 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 conventional hot-melt adhesives.
    Type: Application
    Filed: August 31, 2001
    Publication date: September 5, 2002
    Inventors: Peiguang Zhou, Lance J. Garrett
  • Publication number: 20020123725
    Abstract: The present invention relates to disposable personal care products, such as diapers, feminine care products and adult incontinence products. More specifically, the invention relates to such products having improved absorbent core integrity and core absorbency. These products eliminate the need for costly adhesives The present invention also comprises a method for making the products of the invention. The method includes forming a plurality of localized compressions by ultrasonically compressing the natural fiber core between, although not necessarily adjacent to, at least one upper and at least one underlying fusible material. The periphery of the article is then bonded by conventional means, such as adhesives, crimping or fusing. This process reduces costs associated with the manufacturing of such articles by eliminating or reducing the amount of adhesives in the final product, and by eliminating costly and intermittent bonding procedures.
    Type: Application
    Filed: December 29, 2000
    Publication date: September 5, 2002
    Inventors: Ruth A. Lachapell, Chinmay S. Betrabet
  • Patent number: 6443931
    Abstract: An absorbent article such as a panty liner for disposal of body fluids discharged thereon includes a body facing side, an undergarment facing side and an absorbent core disposed therebetween, the undergarment facing side including a thermoplastic synthetic fiber layer placed against a bottom surface of the core and having a density lower than that of the core, a synthetic resin layer having a density higher than that of the fiber layer and a first thermoplastic synthetic fiber having a density lower than that of the resin layer, and the synthetic fiber layer being coated with adhesive agent to an undergarment.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: September 3, 2002
    Assignee: Uni-Charm Corporation
    Inventors: Nobuhiro Kurata, Mitsuhiro Wada
  • Publication number: 20020120244
    Abstract: There is provided a new multi-layered fibrous material for use in personal care products. In this material, a layer having a mixture of pulp, superabsorbent and binder is adjacent a layer having a very high superabsorbent concentration. The structure is then compacted to a density of between about 0.1 to 0.3 g/cc. These layered structures have better intake properties than traditionally made competitive materials. These structures surprisingly also have better distribution properties than competitive materials. Such a fibrous material is useful in personal care products, like diapers, training pants, incontinence garments and feminine hygiene products.
    Type: Application
    Filed: December 21, 2000
    Publication date: August 29, 2002
    Inventors: Lawrence Howell Sawyer, Andrew Scott Burnes, Sylvia Bandy Little, Lisa Ann Schild
  • Patent number: 6441267
    Abstract: Disclosed are multicomponent fibers wherein at least one component comprises a conventional, non-biodegradable synthetic polymer forming the exposed surface of the multicomponent fiber, thereby permitting thermal bonding of the multicomponent fiber to other fibers. The fibers also include at least one biodegradable component. The multicomponent fibers are useful in the manufacture of nonwoven structures, and in particular nonwoven structures used as a component in disposable absorbent products.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: August 27, 2002
    Assignee: Fiber Innovation Technology
    Inventor: Jeffrey S. Dugan
  • Publication number: 20020115970
    Abstract: An improved internal wetting agent is provided for blending with polymeric material, with the formation of apertured films and/or polymeric fibrous webs contemplated. Films and/or nonwoven fabrics of this nature are suited for use in disposable absorbent articles, particularly for the so-called topsheet or facing layer, which contacts the wearer during use. Because polymeric materials from which these types of facing layers are made are typically hydrophobic, the provision of an internal wetting agent facilitates the passage of liquid through the facing layer into an associated absorbent structure.
    Type: Application
    Filed: October 25, 2001
    Publication date: August 22, 2002
    Inventors: John Steffen, Brian Smith
  • Publication number: 20020115977
    Abstract: The present invention relates to shape deformable materials, which are capable of (1) being deformed, (2) storing an amount of shape deformation, and (3) recovering at least a portion of the shape deformation when exposed to electromagnetic radiation (EMR) energy. The shape deformable materials can advantageously be in the form of films, fibers, filaments, strands, nonwovens, and pre-molded elements. The shape deformable materials of the present invention may be used to form products, which are both disposable and reusable. More specifically, the shape deformable materials of the present invention may be used to produce products such as disposable diapers, training pants, incontinence products, and feminine care products.
    Type: Application
    Filed: December 15, 2000
    Publication date: August 22, 2002
    Inventors: Vasily A. Topolkaraev, Thomas Walter Odorzynski, Dave Allen Soerens, Michael J. Garvey, Duane Girard Uitenbroek
  • Publication number: 20020115972
    Abstract: An absorbent article and a method for manufacturing an absorbent article are disclosed. The absorbent article is made from an inner core absorbent material, which is surrounded by an apertured film. The absorbent material is selected from rayon, cotton, wood pulp, polyester, polyamide, polyolefin, copolymers thereof, and combinations thereof. The absorbent article has a bottom layer, which is made of an apertured film oriented such that protuberances face the inside of the absorbent article. The absorbent article also has a top layer, which is made of an apertured film oriented such that the protuberances face the outside of the absorbent article. The absorbent article may be useful in various applications including sanitary protection and bandages.
    Type: Application
    Filed: December 20, 2000
    Publication date: August 22, 2002
    Inventors: Shmuel Dabi, Robert L. Sun
  • Publication number: 20020105110
    Abstract: An economical method is disclosed for modifying the physical characteristics of a nonwoven fibrous web which involves passing the web between at least one pair of interengaged rolls to incrementally stretch the web, and then withdrawing the incrementally stretched web from between the rolls under tension. A web modified according to the disclosed method has advantageous elongation, extensibility and strength properties, as well as other desirable characteristics. In another aspect, a method is disclosed for forming a composite material by combining a modified nonwoven web with a polymeric film, or an elastic member, which may be liquid impervious yet breathable. In yet other aspect, a method is disclosed for forming a composite material by combining a modified web with a polymeric film which is rendered liquid-impervious yet breathable while the method is performed.
    Type: Application
    Filed: February 7, 2002
    Publication date: August 8, 2002
    Applicant: The Procter & Gamble Company
    Inventors: George Christopher Dobrin, Douglas Herrin Benson, John Joseph Curro
  • Patent number: 6420285
    Abstract: The present invention provides multicomponent fibers arranged in structured domains. At least one of the polymer components is formed of a multipolymer blend. The present invention also provides nonwoven fabrics formed of the multicomponent fibers, the fabrics having a superior combination of extensibility, tensile properties and abrasion resistance. A second layer can be laminated to this coherent extensible nonwoven web.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: July 16, 2002
    Assignee: BBA Nonwovens Simpsonville, Inc.
    Inventors: David D. Newkirk, Harold Edward Thomas, David Bruce Christopher, Barry DeWayne Meece
  • Patent number: 6414216
    Abstract: The invention concerns an absorbent single use hygiene item comprising a liquid-tight back sheet (4) and a liquid permeable cover sheet (2), with an absorbent body (6) containing super-absorbent polymer materials and suitable for storing bodily fluids, especially urine, which is disposed between the back sheet (4) and the cover sheet (2), and with a two-ply intermediate layer (8) which takes up and distributes liquid. The intermediate layer (8) is made from a top stratum (18) consisting of synthetic fibers and a bottom stratum (20), the average pore volume of the top stratum (18) being greater than the average pore volume of the bottom stratum (20), and is disposed between the absorbent body (6) and the cover sheet (2).
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: July 2, 2002
    Assignee: Paul Hartmann AG
    Inventor: Krzysztof Daniel Malowaniec
  • Patent number: 6410465
    Abstract: A moisture vapor permeable, substantially liquid impermeable composite sheet material includes a powder-bonded nonwoven web adhered to a moisture vapor permeable thermoplastic film. The nonwoven web includes a first layer comprised primarily of fibers that are compatible with an adhesive used to bond the web, and a second layer comprised of a blend of fibers, some of which are compatible with, and some of which are incompatible with the bonding adhesive and the thermoplastic film. A method for making the composite sheet material and an item of apparel made from the sheet material are also provided.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: June 25, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hyun Sung Lim, George Joseph Ostapchenko
  • Patent number: 6403857
    Abstract: A discrete superabsorbent layer is adhered to the lower surface of a fibrous absorbent structure using a water-based polymeric binder is disclosed. The advantages are that a superabsorbent roll good can be prepared for later conversion into disposable absorbent products. The use of the water-based polymeric binder prevents particles of superabsorbent from becoming dislodged from the structure during handling and processing.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: June 11, 2002
    Assignee: Buckeye Technologies Inc.
    Inventors: James R. Gross, Samuel C. Baer, Steve Leptick, John P. Erspamer
  • Patent number: 6398769
    Abstract: The invention relates to an absorption material (50; 60) comprising a carrier material exhibiting a coating (51; 61) of a thermosensitive polymer with a cloud point at a temperature in the vicinity of and somewhat below the body temperature of a healthy human being. The absorption properties of the polymer change at the cloud point, so that the polymer substantially lacks absorption capacity at a first temperature on one side of the cloud point but exhibits good absorption properties at a second temperature on the other side of the cloud point. Furthermore, the invention includes an absorbent article such as a diaper, an incontinence protector, a sanitary napkin, or the like, having an absorption body comprising an absorption material coated with a thermosensitive polymer.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: June 4, 2002
    Assignee: SCA Hygiene Products AB
    Inventors: Maria Fernkvist, Thami Chihani
  • Publication number: 20020052585
    Abstract: The present invention comprises a continuous feed spun bonded laminate having improved elastic properties measured at body temperature. The laminate comprises at least one first and second nonelastic layers between which is sandwiched at least one elastic layer, the elastic layer being comprised of a triblock polystyrene-poly(ethylene/propylene)-polystyrene (“SEPS”) copolymer having a number average molecular weight of about 81,000 g/mol. The weight percent of styrene is approximately 18% and the weight percent of ethylene/propylene is approximately 82%. The molecular weight increase in the EP block, while holding the molecular weight of the styrene block constant, increases the entanglement density, polymer chain persistence length and the relaxation time. The resulting laminate load decay rate and load loss measurements over a period of 12 hours at body temperature showed marked improvement over known CFSBL product.
    Type: Application
    Filed: March 27, 2001
    Publication date: May 2, 2002
    Applicant: Kimberly-Clark Worldwide, Inc.
    Inventors: Oomman P. Thomas, James R. Fitts, Richard M. Shane, Donald V. Willitts
  • Patent number: 6379770
    Abstract: Fibrous sorbent media or pads are formed from non-woven mats of thermoplastic fibers, preferably polypropylene fibers, having a mean diameter between about 0.5 microns and about 25 microns. The mats have a weight between about 2 ounces/yd2 and about 25 ounces/yd2; a thickness of at least {fraction (1/20)} of an inch; an oil absorbency ratio of at least 5 to 1 or a water absorbency ratio of at least 5 to 1. The sorbent media have first and second major surfaces with abrasion resistant, liquid permeable, integral skins and fibrous cores. The liquid permeable skins of the media are formed by melting fibers at and immediately adjacent the major surfaces of the mats to form thermoplastic melt layers which are subsequently solidified into the skins on the major surfaces of the mats. For many applications, the thermoplastic fibers of the mats are point bonded together at spaced apart locations to increase the integrity of the mats.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: April 30, 2002
    Assignee: Johns Manville International, Inc.
    Inventors: Larry Leroy Vair, Jr., Robert G. Sanders, Cleotha Jennings, James Edward Jones, III
  • Publication number: 20020042599
    Abstract: The present invention relates to thermoplastic materials which are anaerobically degradable in an active sewage sludge. These materials are melt processable into fibers, films or laminates, and are suitable for use in an absorbent article, particularly flushable interlabial products, tampons and pantiliners.
    Type: Application
    Filed: August 8, 2001
    Publication date: April 11, 2002
    Applicant: The Procter & Gamble Company
    Inventors: Jean Jianqun Zhao, Saeed Fereshtehkhou, Jay William Gooch
  • Patent number: 6369292
    Abstract: Absorbent articles having reduced outer cover dampness are provided and include a hydrophobic barrier layer positioned between an absorbent core and a breathable liquid impervious outer cover. The hydrophobic barrier layer, such as one or more layers of nonwoven webs, has a thickness of at least 0.03 cm and a hydrohead value of at least 18 millibars. The hydrophobic barrier layer does not significantly reduce the water-vapor transmission rate (WVTR) of the absorbent article when the absorbent core is dry yet significantly reduces the overall WVTR of the absorbent article once the absorbent core is wet. Thus, an absorbent article is provided having a WVTR that exceeds about 1500 grams/square meter 24 hours when dry and yet is less than 15,000 grams/square meter 24 hours when wet.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: April 9, 2002
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: David Craige Strack, Ann Louise McCormack, Timothy Ray Martin
  • Patent number: 6365795
    Abstract: There is disclosed an absorptive article including a liquid-permeable surface material on a liquid receiving side. The surface material is formed of a nonwoven fabric including an upper layer to face the skin of a wearer, and a lower layer positioned under the upper layer. At least the fibers forming the upper layer contain titanium oxide. The fibers forming the lower layer have a lower elongation percentage and a higher tensile strength, as measured according to the JIS L 1013, than those of the fibers forming the upper layer.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: April 2, 2002
    Assignee: Uni-Charm Corporation
    Inventors: Makoto Suekane, Satoshi Mizutani, Katsushi Tomita, Etsuko Tagami
  • Patent number: 6362277
    Abstract: A flushable personal care article contains a backing or barrier layer comprising a water degradable polyolefin-containing film having greater than about 55 weight percent of a modified polyolefin and less than about 45 weight percent of unmodified poly(ethylene oxide). The polyolefin is modified by grafting thereto a monomer selected from 2-hydroxyethyl methacrylate and polyethylene glycol ethyl ether methacrylate in an amount ranging between about 0.1 weight percent and about 30 weight percent, based on the total weight of the polymer blend. The polyolefin-containing film, when immersed in water for about 30 seconds, loses at least 10% in two or more of the tensile properties: percent strain-to-break, peak stress, energy-to-break and modulus when compared to the dry or pre-immersion values.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: March 26, 2002
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: James Hongxue Wang, David Michael Schertz
  • Publication number: 20020035352
    Abstract: Absorbent article such as a diaper, pant diaper, incontinence guard, sanitary napkin, wound dressing or the like comprising a layer of continuous fibers (9), so called tow, which is bonded in a random pattern where the bonding sites are randomly distributed in the xy- as well as in the z-direction of the layer, but where the fibers otherwise are substantially unbonded to each other. Preferably the layer is bonded by means of so called through-air-bonding. The layer can either be used as a liquid acquisition layer between the topsheet and the absorbent body, as a topsheet or as a combined topsheet and liquid acquisition layer.
    Type: Application
    Filed: September 18, 2001
    Publication date: March 21, 2002
    Inventors: Peter Ronnberg, Kent Vartiainen
  • Patent number: 6359063
    Abstract: A flushable personal care article contains a backing or barrier layer comprising a water degradable modified polyolefin-modified poly(ethylene oxide-containing film having greater than about 55 weight percent of a modified polyolefin and less than about 45 weight percent of a modified poly(ethylene oxide). The polyolefin and poly(ethylene oxide) polymers are modified by having grafted thereto from about ⇄0.1 weight percent to about 30 weight percent of a monomer selected from 2-hydroxyethyl methacrylate or polyethylene glycol ethyl ether methacrylate. The modified polyolefin-modified poly-(etheylene oxide)-containing film of the invention, when immersed in water for about 30 seconds, loses at least 10% in two or more of the tensile properties: percent strain-to-break, peak stress, energy-to-break and modulus when compared to the dry or pre-immersion values.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: March 19, 2002
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: James Hongxue Wang, David Michael Schertz
  • Publication number: 20020032421
    Abstract: Disclosed is a nonwoven, absorbent fibrous web, including a layer of airlaid substantially opened fibers. The fibers include more than 70% by weight short fibers. Also included in the web is an interfiber binder.
    Type: Application
    Filed: December 23, 1997
    Publication date: March 14, 2002
    Inventors: JOHN B SCOTT, MAURICE R BAILEY
  • Publication number: 20020032424
    Abstract: The invention relates to a material structure for use in absorbent articles, and an absorbent article comprising such a material structure. The material structure (1) comprises a liquid-pervious cover layer (2), a liquid-impervious cover layer (3), and an absorbent structure (4, 4′) enclosed between the cover layers (2, 3). Thereby, the absorbent structure (4, 4′) comprises polylactide fibres or filaments, the properties of which contributing to a rapid acquisition of liquid through the liquid-pervious cover layer (2) for absorption into the absorbent structure (4, 4′) also when the material structure (1) is subjected to repeated wettings. The invention can advantageously be applied within the field of absorbent hygiene articles, such as different types of diapers and incontinence guards, sanitary napkins, pantyliners, and the like.
    Type: Application
    Filed: May 21, 2001
    Publication date: March 14, 2002
    Inventors: Hannele Nurmi, Anders Silfverstrand, Anna-Karin Jornbrink, Eva Simmons, Elisabeth Lakso, Gunilla Himmelman
  • Publication number: 20020026166
    Abstract: A unitary absorbent layer composed of a crosslinked cellulosic fibers and a binder is disclosed. In a preferred embodiment, the binder is a bicomponent binding fiber. In combination with one or more other layers in an absorbent article, the unitary absorbent layer can rapidly acquire, distribute, temporarily store, and then release the acquired liquid to other liquid retention layers. Methods for forming the unitary absorbent layer are also disclosed.
    Type: Application
    Filed: August 20, 1998
    Publication date: February 28, 2002
    Applicant: Weyerhaeuser Company
    Inventors: PETER A. GRAEF, COLIN ELSTON, DANIEL T. BUNKER, FRED B. HOWARD, JEFFREY D. MATTHEWS, SHAHROKH A. NAIENI
  • Publication number: 20020026168
    Abstract: A body fluid absorbent panel including openings and a barrier which comprises, in turn, a shape keeping layer formed with a plurality of thermoplastic synthetic resin fibers and a body fluid retaining layer formed with a plurality of thermoplastic synthetic fibers mixed with an absorbent material, wherein the synthetic resin fibers are hot welded together at contact points of these fibers in the shape keeping layer as well as in the body fluid retaining layer and the synthetic resin fibers of these layers are hot welded together at contact points of these fibers along an interface of the shape keeping layer and the body fluid absorbent layer.
    Type: Application
    Filed: August 24, 2001
    Publication date: February 28, 2002
    Inventors: Toshiya Yagou, Kazuaki Onishi
  • Publication number: 20020022691
    Abstract: A fiber composition which comprises a blend of modified polypropylene and modified poly(ethylene oxide). This fiber composition can be melt-processed to make fibers useful in flushable personal care products. A process for making this fiber composition is also provided.
    Type: Application
    Filed: April 23, 2001
    Publication date: February 21, 2002
    Inventors: James H. Wang, David M. Schertz
  • Patent number: 6344595
    Abstract: The invention provides synthetic polymeric fibers which have utility as temporary acquisition/distribution absorbent structures and permanent storage/distribution absorbent structures in a wide range of absorbent products such as diapers, feminine napkins, and adult incontinent pads. These fibers are short, highly distorted, and bulky characterized by lengths between 2 and 37 mm, short-range distortion factors between 5 and 70, long-range distortion factors between 0.05 and 0.9, and single fiber bulk factors between 0.5 and 10.0. They may or may not have capillary channels on the surface. The advantages of these materials are their increased absorbency, reduced wet collapse at low densities, reduced rewet, reduced loss of liquid under pressure, and their ability to be desorbed by distribution materials such as capillary channeled fibers or by conventional storage materials such as fluff pulp or superabsorbent polymer fiber or powder.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: February 5, 2002
    Assignee: Clemson University Research Foundation
    Inventors: Bobby Mal Phillips, Shriram Bagrodia
  • Publication number: 20020007169
    Abstract: The present invention provides an absorbent composite having improved surface dryness. The composite has three strata with adjacent strata separated by a transition zone. The composite's first stratum includes synthetic fibers and provides the composite with improved surface dryness. Methods for forming the composite and absorbent articles that incorporated the composite are also provided.
    Type: Application
    Filed: March 23, 2001
    Publication date: January 17, 2002
    Applicant: Weyerhaeuser Company
    Inventors: Peter A. Graef, Terry M. Grant, David G. Marsh
  • Publication number: 20020007167
    Abstract: A multiple layer water-absorbent core is described which is suitable for use in an absorbent article. The water-absorbent core comprises a water-absorbent layer and a water-management layer which acts to reduce the exposure of the core to water. The water-management layer is preferably formed from the hydrophobic material. An absorbent article comprising a liquid pervious cover sheet, a liquid impervious backsheet and a multiple layer water-absorbent core of the invention is also described.
    Type: Application
    Filed: May 6, 1999
    Publication date: January 17, 2002
    Inventors: ERVIN DAN, ARTHUR ROGER SHIPLEY
  • Publication number: 20020007168
    Abstract: A breathable disposable absorbent article such as, for example, a diaper, is provided which comprises a top sheet, a backsheet and an absorbent layer therebetween. The top sheet and the backsheet are sealed together to form a unitary structure and include a medial cutout portion on each side which define openings for the leg of the wearer. One or more so-called landing zones are provided on the backsheet, adapted to releasably adhere to fastening tabs located at each side of the article. A liquid impervious sheet or film is laminated to the top surface of the backsheet in order to prevent leakage of fluids and exudates.
    Type: Application
    Filed: April 30, 1999
    Publication date: January 17, 2002
    Inventor: HAMZEH KARAMI
  • Publication number: 20010056269
    Abstract: A disposable undergarment has a liquid-absorbent panel, and the panel includes a body fluid absorbing/holding layer formed with a plurality of depressions each extending in the thickness direction thereof and a nonwoven fabric layer placed upon upper surface of the absorbing/holding layer. Heat-sealable fibers contained in the absorbing/holding layer are heat-sealed with the nonwoven fabric layer over contacting surfaces of these absorbing/holding layer and the nonwoven fabric layer. Furthermore, the nonwoven fabric layer is partially engaged in the depressions of the absorbing/holding layer so that the heat-sealable synthetic fibers contained in the absorbing/holding layer are heat-sealed with the nonwoven fabric layer also over contacting surfaces of these two layers in the respective depressions.
    Type: Application
    Filed: June 13, 2001
    Publication date: December 27, 2001
    Inventors: Takaaki Shimada, Kenji Nakamura, Seiji Suzuki
  • Patent number: 6328723
    Abstract: An absorbent article having a breathable microporous film is disclosed. The breathable microporous film is made by stretching a mixture of a thermoplastic resin and inorganic fillers at least in one direction. At least a part of the breathable microporous film is deformed such that Z number specified by equation (1) is 3.0 or above, wherein MS: average material strain at break of breathable microporous film; AS: average applied strain for deformation; N: neck down prevention coefficient; &sgr;MS: standard deviation of material strain at break; &sgr;AS: standard deviation of applied strain.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: December 11, 2001
    Assignee: The Procter & Gamble Company
    Inventors: John Glasgow Burns, Jr., Chiun-hsien Chang, Kazushige Kishida, Guido Bonelli, Tsunetoshi Miura
  • Publication number: 20010049514
    Abstract: The present invention is directed to absorbent composites having enhanced intake properties. The absorbent composites of the present invention have a Composite Permeability (CP) value at full swelling of greater than about 100 ×10−8 cm2. Further, the absorbent composites, of the present invention have a Composite Permeability/3rd Insult Fluid Intake Flowback Evaluation (FIFE) intake relationship, which results in enhanced intake properties. The present invention is also directed to a method of making absorbent composites having enhanced intake properties. The present invention is further directed to absorbent composites and their applicability in disposable personal care products.
    Type: Application
    Filed: December 30, 1999
    Publication date: December 6, 2001
    Inventors: RICHARD NORRIS DODGE, SRIDHAR RANGANATHAN, SANDRA MARIE YARBROUGH, WENDY LYNN VAN DYKE, MICHAEL JOHN NIEMEYER, YONG LI
  • Patent number: 6323389
    Abstract: The present invention comprises a continuous feed spun bonded laminate having improved elastic properties measured at body temperature. The laminate comprises at least one first and second nonelastic layers between which is sandwiched at least one elastic layer, the elastic layer being comprised of a triblock polystyrene-poly(ethylene/propylene)-polystyrene (“SEPS”) copolymer having a number average molecular weight of about 81,000 g/mol. The weight percent of styrene is approximately 18% and the weight percent of ethylene/propylene is approximately 82%. The molecular weight increase in the EP block, while holding the molecular weight of the styrene block constant, increases the entanglement density, polymer chain persistence length and the relaxation time. The resulting laminate load decay rate and load loss measurements over a period of 12 hours at body temperature showed marked improvement over known CFSBL product.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: November 27, 2001
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Oomman P. Thomas, James R. Fitts, Jr., Richard M. Shane, Donald V. Willitts
  • Patent number: 6323387
    Abstract: A disposable body fluids absorbent article including an absorbent core contained discrete particles, the discrete particles consisting of first polymer particles which have an initial water absorption rate and second polymer particles which have an initial water absorption rate lower than that of the first polymer particles, the first polymer particles being distributed exclusively in a zone defined by a lower ½ of a thickness of the core.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: November 27, 2001
    Assignee: Uni-Charm Corporation
    Inventors: Hiroyuki Soga, Toshio Inoue, Seiji Suzuki, Takaaki Shimada
  • Publication number: 20010041876
    Abstract: There is provided an expandable absorbent material having superabsorbent in an amount from about 1 to about 75 weight percent and crimped thermoplastic fibers in an amount from about 25 to about 99 weight percent, where said material has a density of from about 0.02 g/cc to about 0.25 g/cc. The superabsorbent may be in the form of particulate, fiber and foam. Such a composite may be used in personal care products like diapers, training pants, absorbent underpants, adult incontinence products, and the like.
    Type: Application
    Filed: December 1, 2000
    Publication date: November 15, 2001
    Inventors: Christopher Cosgrove Creagan, Samuel Edward Marmon, Debra Jean McDowall, David Lewis Myers, Xin Ning
  • Patent number: 6313372
    Abstract: A stretch-activated elastic composite includes a non-woven fabric having a potential elongatability of higher than 100% in a predetermined direction, and an elastically recoverable, elastic sheet. The elastic sheet in its unstretched state is partially bonded to the non-woven fabric in its unelongated state. The elastic composite exhibits, per unit width of 5 cm, (1) a stress of lower than 1000 g at 30% stretch, (2) a stress of higher than 400 g at 100% stretch, (3) a breaking point of higher than 400 g and (4) an elastic limit of higher than 200%. The elastic composite after being stretched at a rate of lower than 200% exhibits, per unit width of 5 cm, (1) a stress of lower than 500 g at 30% stretch and (2) a stress of higher than 100 g at 100% stretch. The elastic composite after three repeated cycles of 150% stretching and relaxing exhibits an elastic recovery rate of higher than 60%.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: November 6, 2001
    Assignee: Paragon Trade Brands, Inc.
    Inventor: Migaku Suzuki
  • Patent number: 6310113
    Abstract: A method and apparatus for producing superabsorbent foam wherein the method includes forming a reaction mixture comprising a superabsorbent foam forming composition, stirring, and applying mechanical waves to form a superabsorbent foam.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: October 30, 2001
    Assignee: Nova-Sorb Ltd.
    Inventors: Eliezer Reichman, Arkday Skibinsky, Diana Kumin
  • Publication number: 20010031953
    Abstract: A sheet which gives an absorbent article improved recovery from distortion is disclosed. The sheet has a recovery force of 0.7 cN or more in the cross direction, a compressive strength of 100 cN or less, and a basis weight of 20 g/m2 or more.
    Type: Application
    Filed: February 28, 2001
    Publication date: October 18, 2001
    Inventors: Shoichi Taneichi, Yasuhiro Komori, Manabu Kaneda, Shinsuke Nagahara, Tetsuyuki Kigata, Yayoi Fukuhara, Masahito Tanaka, Minoru Nakanishi
  • Publication number: 20010029143
    Abstract: The present invention is directed to a novel process of making N-isopropyl acrylamide (NiPAm) polymers based upon the reaction of poly(acrylic acid) and N-isopropylamine. The disclosed method of the present invention uses polyacrylic acid as a starting material to synthesize NiPAm polymers. In one embodiment, the present invention discloses a condensation reaction of an intermediate salt to form homopolymers, copolymers and terpolymers of N-isopropyl acrylamide (NiPAm) with acrylic acid and/or alkyl acrylates in a molten state, which is adaptable to a continuous reactive extrusion process. Binder compositions, water-dispersible products and thermoformable articles containing the NiPAm polymers are also disclosed.
    Type: Application
    Filed: May 18, 2001
    Publication date: October 11, 2001
    Inventors: Pavneet Singh Mumick, Yihua Chang, James Hongxue Wang
  • Publication number: 20010027302
    Abstract: A disposable absorbent article, e.g., a diaper, arranged to be worn by a wearer to trap and collect fluid waste products. The article has a flexible chassis made up of a top-sheet, a two layer fluid acquisition system, and a fluid absorbent core.
    Type: Application
    Filed: May 2, 2001
    Publication date: October 4, 2001
    Applicant: Confab Services AG, Switzerland
    Inventors: Frank S. Glaug, William H. Cook, Joan Rodgers, Ruth Levy
  • Patent number: 6294710
    Abstract: The present invention relates to the selection of materials which are particularly useful as fluid distribution material for being used in disposable absorbent articles by being characterized in that they have a wicking time of less than 120 seconds and a cumulative flux of more than 0.075 grams/cm2/second for said preferential fluid distribution direction at 12.4 cm height, when applying the Vertical Wicking Test. A further useful selection criteria for such materials is a non-isotropic fluid distribution behavior, expressed in that the wicking time in the preferential distribution direction is less than 80% of the wicking time of perpendicular direction at 8.3 cm height, when applying the same test.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: September 25, 2001
    Assignee: The Procter & Gamble Company
    Inventors: Mattias Schmidt, Vincenzo D'Acchioli
  • Patent number: 6291050
    Abstract: An apertured polymeric film web having a first surface, a second surface generally parallel to and spaced apart from said first surface, and a plurality of fluid passageways extending between the first surface and the second surface to place the first surface and the second surface in fluid communication with one another. The web is formed of a polymeric film comprising at least one bulk modified layer, the bulk modified layer comprising a substantially homogeneous, stabilized dispersion comprising a comparatively low surface energy material in a polymeric material. The comparatively low surface energy material, referred to herein as a hydrophobic additive, imparts hydrophobicity to the web's first surface, thereby promoting enhanced effectiveness in transporting fluid away from the first surface of the web, particularly when used in combination with a hydrophilic adhesive applied to the web's second surface in a topsheet system of the present invention.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: September 18, 2001
    Assignee: The Procter & Gamble Company
    Inventors: James William Cree, Gregory Wade Taylor
  • Patent number: 6284943
    Abstract: A disposable absorbent article for wearing in an undergarment, such as a sanitary napkin, pantiliner, or incontinence pad is described. The absorbent article includes a topsheet, a backsheet, an absorbent core, and a stiffening feature. The stiffening feature places the absorbent article in an initially stiffened condition during placement of the article in an undergarment. After the article is subjected to the forces exerted by the body of the wearer, the stiffening feature no longer provides an increased initial stiffness and the article becomes more flexible.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: September 4, 2001
    Assignee: The Procter and Gamble Company
    Inventors: Thomas Ward Osborn, III, Letha Margie Hines
  • Patent number: 6277104
    Abstract: The present invention provides an air permeable, substantially liquid impermeable barrier structure and products made therefrom, such as sanitary napkins, pantiliners, incontinence products and diapers. The barrier structure has a porous layer having opposing sides, the porous layer having: a porous substrate having pores, which extend between the opposing sides that correspond to the opposing sides of the porous layer, whereby a liquid may transverse the substrate; and particles that are fused to at least one side of the porous substrate so as to restrict entry of the liquid into the pores; wherein the porous layer resists penetration by the liquid when it is contained in an absorbent structure that overlays the side of the porous layer to which the particles are fused, and is under a loading of one pound per square inch; and wherein the porous layer has a Frazier air permeability value in the range of greater than zero to about 80 mm3/ft2/min (861 mm3/m2/min).
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: August 21, 2001
    Assignee: McNeil-PPC, Inc.
    Inventors: Vincent Paul Lasko, Mary Gail Ciesielski
  • Publication number: 20010014797
    Abstract: An absorbent incontinence pad is provided with a liquid impervious air permeable back sheet and an absorbent unit partly covered by the back sheet, wherein the absorbent unit has a non-woven fabric substrate, an absorbent zone formed by a plurality of highly absorbent layers extending in the form of bands on the surface of the non-woven fabric substrate and an air permeable zone where no such highly absorbent layer exists, which has sufficiently adequate properties to meet incontinence requirements and provides a comfortable feeling during use.
    Type: Application
    Filed: January 12, 2001
    Publication date: August 16, 2001
    Inventors: Migaku Suzuki, Kenichi Uchimoto, Kenji Nakaoka