Reticulated Cellular Product Or Processes Of Preparing A Reticulated Cellular Product Patents (Class 521/52)
  • Patent number: 9665028
    Abstract: An electrophotographic member having a high conductivity and having high adhesiveness to other layer, and a process cartridge and an electrophotographic apparatus using the electrophotographic member as a developer carrying member are provided. The electrophotographic member is an electrophotographic member including an electro-conductive mandrel and an electro-conductive layer, wherein the electro-conductive layer has a resin having a structure represented by the following structural formula (1), and an anion.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: May 30, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hideya Arimura, Masaki Yamada, Kazuhiro Yamauchi, Satoru Nishioka
  • Patent number: 9567446
    Abstract: Micro-sized particles having a polymeric structure of cells are provided. Also provided is a method of producing micro-sized particles having a polymeric structure comprising: (1) forming a homogenous solution by heating a mixture of a high molecular weight polymer and a low molecular weight material, wherein said low molecular weight material makes up at least about 50% by weight of the homogenous solution, (2) forming a dispersed solution by dispersing the homogenous solution formed in step (1) into an inert material, (3) cooling the dispersed solution to cause the high molecular weight polymer to phase separate from the low molecular weight material, (4) forming solid particles comprised of said low molecular weight material trapped inside a structure of cells of said high molecular weight polymer, and (5) removing the solid particles from the dispersed solution.
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: February 14, 2017
    Assignee: Bridgestone Corporation
    Inventors: Xiaorong Wang, Mindaugas Rackaitis, Naruhiko Mashita, Victor Foltz
  • Publication number: 20150118932
    Abstract: The present invention provides porous polymer coatings having adhesive and air flow resistive properties. The porous polymer coating comprises a polymeric foam having a void fraction of greater than about 15% and an air permeability greater than 3 cubic feet per minute per square foot as measured based on ASTM D737-04.
    Type: Application
    Filed: October 30, 2014
    Publication date: April 30, 2015
    Inventors: Troy Raymond Buechler, William C. Wiese, Samuel Mark Gillette
  • Publication number: 20140329018
    Abstract: A reticulated foam structure comprising a plurality of closely-spaced fibers extending across and between the cells. A reticulated polymer foam structure is enhanced by fibers of metal, metal alloys, metal oxides, carbon or glass that are chopped or milled and introduced into the foam structure during foam formation or by entrainment of fibers into the foam. The resulting structure is used as a template to create a high porosity reticulated foam structure of a non-polymer material by coating the non-polymer onto the fiber-enhanced structure and removing the polymer by heating or pyrolizing. The design has utility for applications such as filtration, implants, heat transfer and electrodes, which require structures with low cost, high porosity, small effective pore sizes and large contact surface area.
    Type: Application
    Filed: July 19, 2011
    Publication date: November 6, 2014
    Inventor: Peter G. Berrang
  • Publication number: 20140296358
    Abstract: Implant devices and structures that reduce inflammation and promote healing of the area of implant. Specifically, the use of shape memory open cell biocompatible polymer foams for implants that assist in and promote healing and especially in filling and sealing aneurisms.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 2, 2014
    Inventors: Duncan J. Maitland, Thomas S. Wilson
  • Patent number: 8835519
    Abstract: Disclosed is a method for preparing a sheet for a sealing member of a solar cell, wherein the sheet has significantly low thermal shrinkage and high flexibility, and a superior capability of discharging bubbles during the manufacture of a solar cell module. The method for preparing a sheet for a sealing member of a solar cell according to the present invention comprises the following steps: (a) preparing a thermal adhesive resin having an olefin-based resin as a main component; (b) pulverizing the thermal adhesive resin and dispersing the resin powder; and (c) heating the thermal adhesive resin powder at a temperature lower than the melting temperature of the resin powder so as to prepare a sheet having a plurality of voids.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: September 16, 2014
    Assignee: LG Hausys, Ltd.
    Inventors: Jong-Hun Lee, Chul-June Choi, Sung-Yong Kang, Min-Hee Lee
  • Patent number: 8815966
    Abstract: Disclosed is a sheet for use as a packaging material having a low percentage thermal shrinkage, outstanding flexibility and outstanding properties as a packaging material for solar cells. The sheet for use as a packaging material for solar cells according to the present invention is a resin sheet having air spaces obtained by the hot-melt bonding of a portion of a dispersed hot-bonding resin powder, wherein the apparent density of the sheet is no less than 20(%) and no more than 70(%) of the net density of the hot-bonding resin, such that the sheet is adequately flexible.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: August 26, 2014
    Assignee: LG Hausys, Ltd.
    Inventor: Shibuya Hidekazu
  • Publication number: 20140228458
    Abstract: The present document describes a method and apparatus to rapidly reticulate closed-cell or partially closed-cell foams. The method involves the propagation of an energy impulse inside the foam; the energy impulse can be a shock wave. The energy impulse is generated in the same gaseous environment in which the foam is immersed, preferentially air in room condition. The energy impulse destroys the membranes closing the foam cells without disintegrating the frame's structure. In particular, the method rapidly improves the acoustic and filtering behavior of the foams.
    Type: Application
    Filed: August 28, 2012
    Publication date: August 14, 2014
    Applicant: SOCPRA- Sciences et Génie s.e.c.
    Inventors: Noureddine Atalla, Martin Brouillette, Oliver Doutres, Christian Hébert
  • Patent number: 8801801
    Abstract: The present disclosure relates to reticulated elastomeric matrices, and more particularly to at least partially degradable elastomeric elements that are compressible and exhibit resilience in their recovery and that can be employed in diverse applications including, without limitation, biological implantation, especially in humans.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: August 12, 2014
    Assignee: Biomerix Corporation
    Inventors: Arindam Datta, Lawrence R. Lavelle, Jr., Craig Friedman, Balakrishna Haridas
  • Patent number: 8785507
    Abstract: This invention relates to viscoelastic silicone rubber compositions that are the products of the reaction of: (a) a silanol-terminated polyorganosiloxane base; (b) a boron-containing crosslinking agent; and (c) a siloxane bond-forming crosslinking agent. In a viscoelastic silicone rubber composition of the invention some of the crosslinks, the siloxane crosslinks, are permanent and others of the crosslinks, the boron-containing crosslinks, are temporary. Because a fraction of its crosslinks can come apart and then reform, a viscoelastic silicone rubber composition of the invention can relax stress in response to strain and thus adapt to new shapes. The composition has sufficient permanent crosslinks, however, to establish a permanent equilibrium shape to which the composition will eventually return when not subject to any imposed stress.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: July 22, 2014
    Assignee: University of Virginia Patent Foundation
    Inventor: Louis A. Bloomfield
  • Publication number: 20140163123
    Abstract: A hydrophilic, polyurethane foam manufactured from a composition that includes 90-110 parts by weight of polyester polyol, 0.9-1.1 parts by weight of ester surfactant, 3-20 parts by weight of a hydrophilic surfactant, 1.89-2.31 parts by weight of a polyurethane catalyst, 0.126-0.154 parts by weight of an amine catalyst, 3.348-4.092 parts by weight of water, and 46.98-57.42 parts by weight of toluene diisocyanate. The polyurethane is capable of absorbing water in a time period of about 5 minutes or less. The polyurethane foam is a precursor to the formation of a molten metal filter.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 12, 2014
    Applicant: INOAC USA, Inc.
    Inventor: Fuminori Horio
  • Publication number: 20140142199
    Abstract: The present invention relates to the discovery of a new class of hydrolysable isocyanates, hydrolysable branched polyols and branched absorbable polyesters and polyurethanes prepared therefrom. The resultant absorbable polymers are useful for drug delivery, stents, highly porous foam, reticulated foam, tissue engineering, tissue adhesives, adhesion prevention, bone wax formulations, medical device coatings, surface modifying agents and other implantable medical devices. In addition, these absorbable polymers can have a controlled hydrolytic degradation profile.
    Type: Application
    Filed: January 22, 2014
    Publication date: May 22, 2014
    Inventor: Rao S. Bezwada
  • Patent number: 8722749
    Abstract: A method for producing foams, such as sponges, from hydrocolloids is described. A solid or semi-solid gel is formed by dissolving polymeric material in an aqueous solvent. The gel formed is allowed to set, and may optionally then be cut into the desired shape. The gel may be frozen to allow formation of ice crystals to act as porogens. Subsequently, the gel is exposed to a radiant energy field for drying under vacuum. This causes the solvent to boil and the foam or sponge is formed. Medicinally active ingredients may be included in the process, so that the sponge or foam formed contains the active ingredient dispersed within the structure. The method described provides an alternative to the conventional methods of particulate leaching or freeze drying.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: May 13, 2014
    Assignee: Enwave Corporation
    Inventors: Timothy D. Durance, Jaya Sundaram, Mareike Ressing
  • Patent number: 8445554
    Abstract: A high strength porous polymeric material manufactured by a compression process is disclosed. The material results in a network of interconnected collapsed pores, which forces thin overlapping walls and passages to be created. The network provides permeable access for fluid migration throughout the material. The strength and/or permeability are advantageous for medical devices and implants.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: May 21, 2013
    Assignee: Kensey Nash Corporation
    Inventors: Timothy A. Ringeisen, Amanda Turner, Joseph DeMeo, Patrick E. Hearn, Robert L. McDade
  • Patent number: 8389588
    Abstract: A high strength porous biphasic polymeric reinforcement material manufactured by a compression and/or sintering process is disclosed. The material results in a network of interconnected collapsed pores, which forces thin overlapping walls and passages to be created. The network provides permeable access for fluid migration throughout the material. The strength and/or permeability are advantageous for medical devices and implants.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: March 5, 2013
    Assignee: Kensey Nash Corporation
    Inventors: Timothy A. Ringeisen, Robert L. McDade
  • Publication number: 20120276039
    Abstract: The present invention provides aptamer-modified polymers and materials thereof, which may be used for the binding of factors in a wound bed. For example, the aptamer-modified materials can be polypeptides conjugated to polymer foam materials. Such materials may be used, for example, for dressings, wound inserts, or pads.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 1, 2012
    Applicant: KCI LICENSING, INC.
    Inventors: James Courage, Diwi Allen, Amy McNulty, Anthony Rycerz, Christopher Carroll, Douglas Hanson, Todd Fruchterman
  • Patent number: 8277719
    Abstract: A process for the preparation of thermoplastic auxetic foams comprising the steps of: a) taking conventional thermoplastic foam; b) subjecting said foam to at least one process cycle wherein the foam is biaxially compressed and heated; c) optionally subjecting the foam to at least one process cycle wherein the biaxial compression is removed and the foam mechanically agitated prior to reapplying biaxial compression and heating; d) cooling said foam to a temperature below the softening temperature of said foam; and e) removing said compression and heat.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: October 2, 2012
    Assignee: Auxetic Technologies Ltd.
    Inventors: Andrew Alderson, Kim Lesley Alderson, Philip John Davies, Gillian Mary Smart
  • Publication number: 20120208896
    Abstract: The present invention relates to the discovery of new class of hydrolysable amino acid derivatives and absorbable polyester amides, polyamides, polyepoxides, polyureas and polyurethanes prepared therefrom. The resultant absorbable polymers are useful for drug delivery, tissue engineering, tissue adhesives, adhesion prevention, bone wax formulations, medical device coatings, stents, stent coatings, highly porous foams, reticulated foams, wound care, cardiovascular applications, orthopedic devices, surface modifying agents and other implantable medical devices. In addition, these absorbable polymers should have a controlled degradation profile.
    Type: Application
    Filed: January 25, 2012
    Publication date: August 16, 2012
    Applicant: Bezwada Biomedical, LLC.
    Inventor: Rao S. Bezwada
  • Patent number: 8133923
    Abstract: Single domain wafer-scale colloidal crystals and macroporous polymers are formed by dispersing concentrated solutions of colloids, desirably monodisperse silica colloids, in a viscous monomer, desirably ethoxylated trimethylolpropane triacrylate, and spin-coating them onto a substrate. Subsequent photopolymerization produces three-dimensionally ordered colloidal crystals trapped inside a polymer matrix. Selective removal of the polymer matrix, such as by oxygen plasma treatment, or removal of the silica spheres, such as by wet etching, produces large-area colloidal crystals and macroporous polymers, respectively.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: March 13, 2012
    Assignee: Corning Incorporated
    Inventor: Peng Jiang
  • Patent number: 7993738
    Abstract: Modified porous materials are disclosed having interconnected, complexly shaped three-dimensional surfaces. The modification is accomplished by crosslinking the three-dimensional surfaces or by incorporating, in situ, an inorganic material onto or into three-dimensional surfaces. The porous materials are macro structures including at least one of nano-features, micro-features, and combinations thereof. The modifying accomplishes changing surface properties of the porous materials, changing the three-dimensional surfaces, and/or rendering the porous materials substantially stable in a predetermined environment.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: August 9, 2011
    Assignee: The Regents of the University of Michigan
    Inventors: Peter X. Ma, Xiaohua Liu
  • Publication number: 20100256777
    Abstract: The present disclosure relates to reticulated elastomeric matrices, and more particularly to at least partially degradable elastomeric elements that are compressible and exhibit resilience in their recovery and that can be employed in diverse applications including, without limitation, biological implantation, especially in humans.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 7, 2010
    Applicant: BIOMETRIX CORPORATION
    Inventors: Arindam Datta, Lawrence P. Lavelle, JR., Craig Friedman, Balakrishna Haridas
  • Patent number: 7723395
    Abstract: A high strength porous polymeric material manufactured by a compression process is disclosed. The material results in a network of interconnected collapsed pores, which forces thin overlapping walls and passages to be created. The network provides permeable access for fluid migration throughout the material. The strength and/or permeability are advantageous for medical devices and implants.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: May 25, 2010
    Assignee: Kensey Nash Corporation
    Inventors: Timothy A. Ringeisen, Amanda Turner, Joseph DeMeo, Patrick E. Hearn, Robert L. McDade
  • Publication number: 20100017972
    Abstract: The present invention relates to a new class of adducts containing peptidic-based segments of proteic hydrolysates and gelatins, chemically bound to polymeric-based segments of polyethylene glycol (PEG) with variable length and processes for the preparation thereof. The new materials can also contain segments of acrylic or vinylic polymers.
    Type: Application
    Filed: December 17, 2007
    Publication date: January 28, 2010
    Inventors: Luciana Sartore, Maurizio Penco, Andrea Sassi, Manuela Cinzia Candido
  • Publication number: 20090111901
    Abstract: A structural foam material comprising that contains a volatile corrosion inhibitor homogenized in the pre-thermoformed resin. The foam can be of a reticulated or open-cell type. The foam can also be of a closed-cell type that has a sufficient number of cells opened so as to permit migration of the volatilzed corrosion inhibitor.
    Type: Application
    Filed: October 29, 2007
    Publication date: April 30, 2009
    Inventor: William M. Allen
  • Publication number: 20090061200
    Abstract: A hydrophobic foam insulation material is formed from a foam core material and a hydrophobic surface layer that is covalently bonded to the core, and is fully conformal to the core foam material. The surface layer is applied in a plasma. The foam material may have further been subjected to a reticulation process involving a plasma to reduce the density of the foam. Such hydrophobic insulation material is thus made lightweight, flexible, and suitable for aircraft applications.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Applicant: TriStar Plastics Corporation
    Inventors: Frank Hild, David Biering
  • Publication number: 20080254255
    Abstract: The present invention provides an innovative gel foam elastomer and method of manufacturing thereof, which blends raw gel with the powdery foaming/bridging agent, and then adds some assistants to begin the foaming procedure. The raw gel molecules and foaming agent molecules generate a bonding effect of virtual key or elastic key, thus forming a solid gel foam elastomer. The elastomer can be fabricated into various 3D structures, and also incorporated into the superficial layer or mat structure. The elastomer of the present invention overcomes the instability problem of existing liquid gel, but also maintains the excellent softness property, thus providing improved applicability for the industry and the users.
    Type: Application
    Filed: April 16, 2007
    Publication date: October 16, 2008
    Applicant: TAIWAN SEESUN INC.
    Inventor: Chen-I Kao
  • Patent number: 7390844
    Abstract: The present invention discloses a water dispersible polymer particle stabilized by a hydrophobically capped oligomeric acrylamide dispersant. The present invention also discloses a heterogeneous method for forming polymer particles comprising providing a water immiscible organic phase comprising at least one monomer dispersed in a continuous water phase and a hydrophobically capped oligomeric acrylamide, and polymerizing said organic phase to yield polymer particles stabilized with hydrophobically capped oligomeric acrylamide. Also disclosed in the present invention is a heterogeneous method for forming polymer particles comprising providing a water immiscible organic dispersed in a continuous water phase, polymerizing said organic phase, and adding bydrophobically capped oligomeric acrylamide to yield polymer particles stabilized with hydrophobically capped oligomeric acrylamide.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: June 24, 2008
    Assignee: Eastman Kodak Company
    Inventors: Jeffrey W. Leon, Jeanne E. Kaeding, Dennis E. Smith, Trevor J. Wear, Alan R. Pitt, Peter J. Ghyzel
  • Patent number: 7141188
    Abstract: The present invention provides a composition comprising: (a) dielectric material; and (b) porogen comprising at least two fused aromatic rings wherein each of the fused aromatic rings has at least one alkyl substituent thereon and a bond exists between at least two of the alkyl substituents on adjacent aromatic rings. Preferably, the dielectric material is a composition comprising (a) thermosetting component comprising (1) optionally monomer of Formula I as set forth below and (2) at least one oligomer or polymer of Formula II as set forth below where Q, G, h, I, I, and w are as set forth below and (b) porogen.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: November 28, 2006
    Assignee: Honeywell International Inc.
    Inventors: Bo Li, Nancy Iwamoto, Boris Korolev, Paul G. Apen, Kreisler Lau, John G. Sikonia, Ananth Naman, Amauel Gebrebrhan, Nassrin Sleiman, Ruslan Zherebin
  • Patent number: 7060204
    Abstract: The present invention provides a composition comprising: (a) dielectric material; and (b) porogen comprising at least two fused aromatic rings wherein each of the fused aromatic rings has at least one alkyl substituent thereon and a bond exists between at least two of the alkyl substituents on adjacent aromatic rings. Preferably, the dielectric material is a composition comprising (a) thermosetting component comprising (1) optionally monomer of Formula I as set forth below and (2) at least one oligomer or polymer of Formula II as set forth below where Q, G, h, I, I, and w are as set forth below and (b) porogen.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: June 13, 2006
    Assignee: Honeywell International Inc.
    Inventors: Bo Li, Nancy Iwamoto, Boris Korolev, Paul G. Apen, Kreisler Lau, John G. Sikonia, Ananth Naman, Amauel Gebrebrhan, Nassrin Sleiman, Ruslan Zherebin
  • Patent number: 6960616
    Abstract: Open-celled membranes from thermoplastic polymers are prepared from foamed polymer melts by extrusion through a die and particulary suitable for filtration.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: November 1, 2005
    Assignee: Sartorius AG
    Inventor: Rebecca Klötzer
  • Patent number: 6914085
    Abstract: Expanded granules or a moulded article made therefrom, based on semicrystalline propylene polymer comprising, per 100 parts by weight, less than 0.035 parts by weight of volatile compounds and processes for its preparation.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: July 5, 2005
    Assignee: BP Belgium N.V.
    Inventors: Emmanuel Michel Delaite, Herve Joseph Gislain Cuypers
  • Patent number: 6740685
    Abstract: The present invention provides a composition comprising (a) thermosetting component comprising: (1) optionally monomer of Formula I as set forth below and (2) at least one oligomer or polymer of Formula II as set forth below where E, Q, G, h, l, j, and w are as set forth below and (b) porogen that bonds to thermosetting component (a). Preferably, the porogen is selected from the group consisting of unsubstituted polynorbornene, substituted polynorbornene, polycaprolactone, unsubstituted polystyrene, substituted polystyrene, polyacenaphthylene homopolymer, and polyacenaphthylene copolymer. Preferably, the present compositions may be used as dielectric substrate in microchips, multichip modules, laminated circuit boards, or printed wiring boards.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: May 25, 2004
    Assignee: Honeywell International Inc.
    Inventors: Bo Li, Paul G. Apen, Kreisler S. Lau, Edward J. Sullivan
  • Patent number: 6596785
    Abstract: An ink retaining flexible polyurethane foam is prepared by reacting a polyether polyol with from 50 to 80 parts by weight, based on the weight of polyol, of a polyisocyanate component having one or a mixture of methylene diisocyanates. The foam has pore sizes above 70 pores per linear inch, preferably in the range of 70 to 90 pores per linear inch in an uncompressed state. The foam is reticulated to improve liquid holding capacity, and, depending upon cell size, compressed into a container. The foam absorbs and retains ink, and is resistant against attack from ink, producing less than 2.0% solvent extractables.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: July 22, 2003
    Assignee: Foamex L.P.
    Inventor: Sharon A. Free
  • Patent number: 6589444
    Abstract: The present invention relates to novel compositions of drying agents of superabsorbent polymers, molecular sieves and mixtures thereof and binders of polyurethane foam, polyisocyanurate foam and supports comprising cellulose and a method for separating, drying and/or filtering chemical mixtures. The composition and method of the invention have broad applicability. They may be used for example to remove water from chemical mixtures like refrigerants (e.g., in vehicular refrigeration systems), air (e.g., in vehicular braking systems), natural gas and cleaning solvents (e.g., used in semiconductor manufacture and pipeline cleaning).
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: July 8, 2003
    Assignee: Honeywell International Inc.
    Inventors: Raymond Hilton Percival Thomas, Roy Philip Robinson, David John Williams, Peter Brian Logsdon
  • Publication number: 20030049870
    Abstract: A selective adsorption material, especially suitable for adsorption of biological macromolecules, is described. The, adsorption material comprises a matrix with immobilised ligands, localised to selectively adsorb a predetermined molecule. A process for preparing a selective adsorption material, especially suitable for adsorption of biological macromolecules, is also described. The process is characterised in that a print molecule having at least two separate binding sites is bonded to the corresponding, at least two immobilisable ligands, the ligands are immobilised, and subsequently the print molecule is removed. The selective adsorption material can be used for purification or analysis, especially of biological macromolecules.
    Type: Application
    Filed: May 5, 1994
    Publication date: March 13, 2003
    Inventors: MAGNUS GLAD, MARIA KEMPE, KLAUS MOSBACH
  • Publication number: 20030018093
    Abstract: An ink retaining flexible polyurethane foam is prepared by reacting a polyether polyol with from 50 to 80 parts by weight, based on the weight of polyol, of a polyisocyanate component having one or a mixture of methylene diisocyanates. The foam has pore sizes above 70 pores per linear inch, preferably in the range of 70 to 90 pores per linear inch in an uncompressed state. The foam is reticulated to improve liquid holding capacity, and, depending upon cell size, compressed into a container. The foam absorbs and retains ink, and is resistant against attack from ink, producing less than 2.0% solvent extractables.
    Type: Application
    Filed: July 17, 2001
    Publication date: January 23, 2003
    Inventor: Sharon A. Free
  • Patent number: 6371606
    Abstract: An ink retaining flexible polyurethane foam is prepared by reacting a polyether polyol with from 20 to 50 parts by weight, based on the weight of polyol, of a polyisocyanate component having one or a mixture of toluene diisocyanates, such that the 2,4 isomer of toluene diisocyanate includes no more than seventy-five percent by weight of the polyisocyanate component, preferably no more than seventy two and one half percent by weight. The foam has pore sizes in the range of 70 to 88 pores per inch in an uncompressed state. The foam is reticulated to improve liquid holding capacity, and, depending upon pore size, felted to compression ratios from 1 to 2 up to from 1 to 20. The foam absorbs and retains ink, and is resistant against attack from ink, emitting less than 2.0% solvent extractables, preferably less than 1.1% solvent extractables.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: April 16, 2002
    Assignee: Foamex L.P.
    Inventor: Sharon A. Free
  • Patent number: 6337354
    Abstract: An ink wastage absorber is made from a flexible polyurethane foam having an air-permeability of 1.0 cc/cm2/sec or more, or is made from a flexible polyurethane foam produced by using a foamable raw material containing a polyol, an isocyanate, a catalyst, and a foaming agent, wherein the polyurethane foam is impregnated with a surface active agent. An ink supporter includes an ink permeation member provided at a portion corresponding to a printer head and an ink absorbing member being in contact with the ink permeation member.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: January 8, 2002
    Assignee: Bridgestone Corporation
    Inventors: Yoshihiro Katsumata, Hideya Kinoshita
  • Patent number: 6277464
    Abstract: The present invention provides an integral net having a lattice of polymeric material defined by holes traversing the integral net from one surface to the other. The present invention also provides a method for producing an embossed sheet of polymeric material by first contacting a billet of polymeric material with an embossing tool having a plurality of protrusions whereby the embossing tool impresses indentations into the billet to a given depth. Subsequently, the method involves skiving the embossed billet. By this method, an embossed sheet of the polymeric material is removed from the billet, which embossed sheet can be an integral net.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: August 21, 2001
    Assignee: Pall Corporation
    Inventors: John B. Ronan, David E. Newman, Scott Hopkins, Jeffrey B. Burns
  • Publication number: 20010009716
    Abstract: Microporous structures characterized by having a three-dimensional interconnecting network skeleton, which are obtained by comprising mixing a thermoplastic resin, a water-soluble organic compound and a water-soluble polymer material and then eliminating said water-soluble organic compound and said water-soluble polymer material by extracting with water. A process for producing microporous structures comprising mixing a thermoplastic resin with water-soluble components which contain a water-soluble organic compound and a water-soluble polymer material, at a specific volume ratio, thus forming a mixture having a three-dimensional interconnecting network skeleton made of said thermoplastic resin wherein said water-soluble components are maintained, bringing said mixture into contact with water and thus extracting and eliminating said water-soluble components from said mixture, wherein a volume ratio of the water-soluble organic compound to the water-soluble polymer material ranges from 35 to 95/65 to 5.
    Type: Application
    Filed: September 29, 1998
    Publication date: July 26, 2001
    Inventors: TOHRU TAGUCHI, ITARU KUTSUWA, KAZUHIKO YAMADA, SHINSUKE YAMADA, HIROYUKI NISHIMURA
  • Patent number: 6146892
    Abstract: Methods and compositions are described that provide three-dimensional fibrillar matrices useful as, among other things, structural prosthetics and scaffolds for cells. The porous fibrillar matrices of the present invention have desirable mechanical properties suitable to a variety of applications, including platforms for in vitro cell cultivation, implants for tissue and organ engineering, implants as tendon and facia prosthetics, and product packaging.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: November 14, 2000
    Assignee: The Regents of the University of Michigan
    Inventors: Peter X. Ma, Ruiyun Zhang
  • Patent number: 6071711
    Abstract: A method is disclosed for the enzymatic degradation of polyester amides. The method involves mixing polyester amides with esterase or protease enzymes in aqueous solution.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: June 6, 2000
    Assignee: Bayer AG
    Inventor: Rainhard Koch
  • Patent number: 5856409
    Abstract: A method for altering a macroporous cross-linked hydrophobic copolymeric lattice produced by precipitation polymerization in a solvent of at least one monounsaturated ester monomer and at least one polyunsaturated ester monomer soluble therein, in order to render the hydrophobic copolymeric lattice hydrophilic. The method involves saponifying the hydrophobic copolymeric lattice by reacting the surface of the hydrophobic copolymeric lattice with an aqueous alkali. The surface can also be rendered hydrophilic by polymerizing an acrylate monomer onto the lattice in order to form a surface containing carboxylic acid sites. The carboxylic acid sites formed on the surface of the lattice are converted to carboxylate anions.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: January 5, 1999
    Assignee: Dow Corning Corporation
    Inventors: Maris Jazeps Ziemelis, William Robb Roy Park
  • Patent number: 5845653
    Abstract: An applicator (10) for transferring color-altering material from a rigid substrate (12) to hair or fibers, and methods for making and using the same. The applicator (10) includes a first side (14) and a second side (16). A color-altering dye material (38), which is soluble in water and water-activated, is affixed to at least one of the sides (14,16) of the applicator (10). The applicator (10) is made of a material such as plastic (26), wood (28) or metal (30) and includes a handle (102) for grasping and manipulating the applicator (10) during use. The color of the dye material (38) can be the same, different, or a combination thereof. Use of the applicator (10) requires wetting the hair or fibers, and then wiping the water-activated color-altering material (38) against the hair or fibers.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: December 8, 1998
    Inventor: Tracy H. Abercrombie
  • Patent number: 5744509
    Abstract: A foamed isocyanate-based polymer having a cellular structure and comprising a superabsorbent material, the polymer being capable of: (i) absorbing at least about 10 times its weight of a 0.9 wt./wt. % aqueous NaCl solution maintained at a temperature of from about 20.degree. to about 25.degree. C., and (ii) retaining at least about 10 times its weight of absorbed aqueous NaCl solution which is bound to the superabsorbent material, the cellular structure having a cell size of at least about 30 cells/inch when measured pursuant to ASTM D3576-77. A process for producing the foamed isocyanate-based polymer is also described. The process comprises the steps of: contacting an isocyanate, an active hydrogen-containing compound, an aqueous blowing agent, a catalyst and a superabsorbent material, the superabsorbent material being capable of absorbing at least about 10 times its weight of a 0.9 wt./wt. % aqueous NaCl solution maintained at a temperature in the range of from about 20.degree. to about 25.degree. C.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: April 28, 1998
    Assignee: Woodbridge Foam Corporation
    Inventors: Robert N. Wilson, G. Ronald Blair
  • Patent number: 5719201
    Abstract: A foamed isocyanate-based polymer having a cellular structure and containing a superabsorbent material, the polymer being capable of: (i) absorbing at least about 20 times its weight of an aqueous fluid maintained at a temperature of from about 20.degree. to about 25.degree. C., and (ii) retaining at least about 20 times its weight of absorbed aqueous fluid which is bound to the superabsorbent material. A process for producing a foamed isocyanate-based polymer comprising the steps of: providing a substantially uniform mixture comprising an isocyanate, an active hydrogen-containing compound and a superabsorbent material, the superabsorbent material being capable of absorbing at least about 20 times its weight of an aqueous fluid maintained at a temperature in the range of from about 20.degree. to about 25.degree. C.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: February 17, 1998
    Assignee: Woodbridge Foam Corporation
    Inventor: Robert N. Wilson
  • Patent number: 5716997
    Abstract: A polymeric reticulated structure is prepared by mixing an ethylene-propylene copolymer having an ethylene content of at least 60% by weight or a thermoplastic block copolymer terminated with a crystalline ethylene block with a low molecular weight material. The low molecular weight material is trapped in the three-dimensional continuous network the copolymer forms.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: February 10, 1998
    Assignee: Bridgestone Corporation
    Inventors: Shinichi Toyosawa, Naruhiko Mashita, Yasushi Imai, Takahiro Matsuse, Yuichiro Wakana, Yoshihide Fukahori
  • Patent number: 5698601
    Abstract: Completely open-celled rigid polyurethane foams are produced by subjecting closed-celled or partially closed-celled rigid polyurethane foams to applied external pressure. These open-celled foams are useful as filling material in insulating panels or as insulating foams.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: December 16, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rainer Welte, Hans-Joachim Scholl
  • Patent number: 5674917
    Abstract: A foamed isocyanate-based polymer having a cellular structure and containing a superabsorbent material, the polymer being capable of: (i) absorbing at least about 20 times its weight of an aqueous fluid maintained at a temperature of from about 20.degree. to about 25.degree. C., and (ii) retaining at least about 20 times its weight of absorbed aqueous fluid which is bound to the superabsorbent material. A process for producing a foamed isocyanate-based polymer comprising the steps of: providing a substantially uniform mixture comprising an isocyanate, an active hydrogen-containing compound and a superabsorbent material, the superabsorbent material being capable of absorbing at least about 20 times its weight of an aqueous fluid maintained at a temperature in the range of from about 20.degree. to about 25.degree. C.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: October 7, 1997
    Assignee: Woodbridge Foam Corporation
    Inventor: Robert N. Wilson
  • Patent number: RE44682
    Abstract: Described is a process for making closed cell fluoropolymer foam, and the foam so made. The process includes subjecting a fluoropolymer resin an inert gas at a pressure higher than atmospheric to drive gas into the resin, raising the temperature of the resin to or above its softening point, and reducing the pressure while maintaining the temperature at or above the softening point of the resin, in order to expand the resin to result in closed cell fluoropolymer foam. The resin is cross-linked prior to expansion. The resulting foams can be used in various applications, such as in flotation devices and for making thermal and/or acoustic insulation.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: December 31, 2013
    Assignee: Zotefoams PLC
    Inventors: Paul M. Jacobs, Roger Lock, Neil Witten, Michael Werth, Ramin Amin-Sanayei