Nonuniform Product (e.g., Porous, Etc.) Or With Tensioning Before Application Of Heat Patents (Class 264/288.8)
  • Patent number: 10472482
    Abstract: An extruded polymer foam has a polymer matrix with styrene-acrylonitrile copolymer and infrared attenuator and cell having an average size in the foam vertical direction of 150 micrometers or less, a ratio of vertical cell size to extrusion direction cell size that is greater than one and a cell anisotropic ratio that is greater than 1.1; the foam having a P-Ratio of 0.7 or less, less than 0.2 moles of hydrocarbon blowing agent in the cells per kilogram of foam; a density of 20-48 kilograms per cubic meter and a 25-year thermal conductivity that is 0.030 Waters per meter-Kelvin or less when free of fluorinated blowing agents and less than 0.029 Watts per meter-Kelvin when containing fluorinated blowing agent.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: November 12, 2019
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Van-Chau Vo, David J. Frankowski, Anson Wong, Stéphane Costeux
  • Patent number: 10160415
    Abstract: A hinge device for an airbag door of a vehicle is provided. In particular embodiments, a fabric sheet is made by weaving warp yarns and weft yarns with a plurality of grid spaces and integrally formed on an inner surface of an airbag door. Grid spaces formed in opposite ends of the fabric sheet that are rotated when the airbag door is opened by deployment of an airbag are arranged in a state of being compressed so as to be extensible.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: December 25, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Sung Sik Choi
  • Patent number: 9993750
    Abstract: Clog-resistant serpentine crossflow filters and blade loading structures for micro- and nano-fluidics are provided. In one aspect, a filter includes: a substrate; and at least one layer of pillars on the substrate, wherein the pillars are arranged adjacent to one another and groups of the pillars alternate between being perpendicular and parallel to a direction of fluid flow through the filter giving the filter a serpentine configuration having at least one downstream catch. A method of forming the filter as well as a system employing the filter in conjunction with a pillar sorting array and optionally a staged blade structure are also provided.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: June 12, 2018
    Assignee: International Business Machines Corporation
    Inventors: Joshua T. Smith, Benjamin H. Wunsch
  • Patent number: 9931193
    Abstract: A stent graft including (1) a stent having a wall having at least one opening, an outer surface, and an inner surface and (2) a covering of a composite material having a least one expanded fluoropolymer membrane and an elastomer is provided. The cover can be used to cover the outer and/or the inner surface of the stent. The expanded fluoropolymer membrane contains serpentine fibrils. In exemplary embodiments, the fluoropolymer is polytetrafluoroethylene. The composite material may be axially and/or circumferentially wrapped around the stent. The composite material is fold-free throughout its operating diameter range and exhibits a sharp increase in stiffness at a predetermined diameter. The stent graft can be designed to have a stop point in either a radial or axial direction. The stent graft can advantageously be implanted undersized with respect to a nominal diameter without having material infolding.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: April 3, 2018
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Edward H Cully, Jeffrey B Duncan, Ryan D Kariniemi, Thomas E Kariniemi, Jeffrey J Kustusch, Jared S Nelson
  • Patent number: 9765459
    Abstract: This disclosure relates to an article that includes a nonwoven substrate and a film supported by the nonwoven substrate. The film can include a first polymer and a polymer that is immiscible with the first polymer. The first polymer can include a polyolefin and the second polymer can include a polycycloolefin, a polymethylpentene, or a copolymer thereof.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: September 19, 2017
    Assignee: Fiberweb, LLC
    Inventor: Mehdi Afshari
  • Patent number: 9745435
    Abstract: Composition and method for making a multi-layer bio-based film having one or more cavitated layers. In one aspect, the multilayer flexible film has polylactic acid, an inorganic filler, and a cavitation stabilizer making up at least one film layer. In one aspect, the barrier web has a cavitated bio-based film layer. In another aspect, the print web has a cavitated bio-based film layer.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: August 29, 2017
    Assignee: Frito-Lay North America, Inc.
    Inventors: Robert Nolan Cotton, Kenneth Scott Laverdure, Deepali Palta, Brad Dewayne Rodgers
  • Patent number: 9452089
    Abstract: Absorbent members and methods of making the same are disclosed. In one embodiment, the absorbent member is a unitary absorbent fibrous web having a density profile through its thickness. In one embodiment, the density profile is relatively centered through the thickness of the web and the maximum density of the web is located between about 35% and about 65% of the distance through the thickness of the web. In one embodiment, the method involves subjecting a precursor web to at least one cycle (or pass) through a mechanical deformation process. Typically, the method involves subjecting the precursor web to multiples cycles (or passes) through a mechanical deformation process.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: September 27, 2016
    Assignee: The Procter & Gamble Company
    Inventors: Luigi Marinelli, Kirk Wallace Lake, Jill Marlene Orr, John Brian Strube, Keith Robert Priessman, Carmine Cimini, Mario Dipilla
  • Patent number: 9345802
    Abstract: An absorbent hygiene article that comprises a barrier component, which comprises a nonwoven barrier sheet, comprising at least a spunbond nonwoven web or layer with spunbond fibers and/or a meltblown nonwoven web or layer with meltblown fibers, either or both or all layers comprising fibers comprising thermoplastic polymers and an organic additive component.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: May 24, 2016
    Assignee: The Procter & Gamble Company
    Inventors: Nicole Anja Reichardt, Christian Springob, Brian Udengaard, Lone Kondrup Hummelgaard
  • Patent number: 9346253
    Abstract: Method for imparting elasticity to a laminate comprising at least one elastic film having a width and at least one ply of non-woven material secured to the film, particularly through interposition of a bonding material, particularly glue, which comprises the following steps in which: the laminate is unrolled in the form of a web in order to pass it between two sets of toothing, of which the teeth engage in each other in a direction perpendicular to the plane of the laminate in order to thus stretch the laminate in the direction of its width, characterised in that: a tension is imparted to the web in the longitudinal direction or machine direction during its unrolling between the toothing, particularly by providing a tensioner roll, particularly downstream of the sets of toothing.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: May 24, 2016
    Assignee: APLIX
    Inventors: Jean-Pierre Ducauchuis, Thierry Marche
  • Patent number: 9289741
    Abstract: An apparatus for generating a large volume of gas from a liquid stream is disclosed. The apparatus includes a first channel through which the liquid stream passes. The apparatus also includes a layer of catalyst particles suspended in a solid slurry for generating gas from the liquid stream. The apparatus further includes a second channel through which a mixture of converted liquid and generated gas passes. A heat exchange channel heats the liquid stream. A wicking structure located in the second channel separates the gas generated from the converted liquid.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: March 22, 2016
    Assignee: BATTELLE MEMORIAL INSTITUTE
    Inventors: Ward E. TeGrotenhuis, Karim M. Ayman, Paul H. Humble, Yong Wang
  • Patent number: 9227377
    Abstract: A one-piece plastics material mesh structure, particularly a geogrid, is produced by stretching a plastics sheet starting material formed with an array of holes and comprises a plurality of generally parallel rib structures extending longitudinally in a first direction parallel to the stretch direction and a plurality of generally parallel bar structures extending in a second direction transverse to the rib structures. The rib structures and said bar structures are interconnected by junctions. The rib structures have rib segments oriented in the first direction along their lengths and orientation in this direction extends across the junctions connecting two such oriented rib segments. The bar structures are such that their overall stretch ratio in the second direction is a maximum of 1 and all locations along the length of the bar structures have a maximum orientation of 1.5 in the second direction.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: January 5, 2016
    Assignee: TENSAR TECHNOLOGIES LIMITED
    Inventor: Anthony Thomas Walsh
  • Patent number: 9199409
    Abstract: A stretching apparatus capable of optimally inhibiting neck-in of a film when the film is stretched in an MD (Machine Direction), has an advancing mechanism, a take-in mechanism, and film-holding unit placed at both end portions in a TD (Transverse Direction) of a transfer path of film between the mechanisms. The film-holding unit has a plurality of upper holding rollers placed in parallel at intervals in the MD of the film above the transfer path of film, and a plurality of lower holding rollers placed opposite to upper holding rollers below the transfer path of film such that the plurality of lower holding rollers work together with the plurality of upper holding rollers to sandwich the film vertically between the rollers. Upper holding rollers and lower holding rollers are rotatably supported such that their rotational axes are inclined outward in the TD of film toward a downstream side of the MD of film.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: December 1, 2015
    Assignee: UBE INDUSTRIES, LTD.
    Inventors: Takeru Fujinaga, Yasuhiro Nagoshi, Toshihito Sakai, Hiroyuki Ikeuchi
  • Patent number: 9102132
    Abstract: A pant type absorbent article having a core region includes an absorbent core and a chassis region surrounding the core region. The article in at least a part of the chassis region includes a coversheet in the form of an elastic laminate constituting the sole component of the chassis in at least 20% of the total surface area of the article. The elastic laminate has a tensile strength of at least 15 N/25 mm both in the longitudinal and transverse directions of the article and a tensile strength in the transverse direction of the article which is no more than 2.5 times and preferably no more than 2 times higher than the tensile strength in the longitudinal direction of the article. The force required to extend the elastic laminate 10% in the longitudinal direction of the article is no more than 5 N/25 mm.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: August 11, 2015
    Assignee: SCA HYGIENE PRODUCTS AB
    Inventor: Margareta Wennerbäck
  • Publication number: 20150125734
    Abstract: The purpose of the present invention is to provide a polyolefin resin porous film, which is resistant to wrinkling in a transporting step in a high-temperature environment due to a high shrinkage stress, has superior coating suitability, maintains pore interconnectivity, and thus has superior air permeability. The polyolefin resin porous film of the present invention has a 1% modulus in the flow direction at 90° C. of 4.5 MPa or more and an air permeability of 800 sec/100 ml or less.
    Type: Application
    Filed: June 5, 2013
    Publication date: May 7, 2015
    Applicant: MITSUBISHI PLASTICS, INC.
    Inventors: Takeyoshi Yamada, Yasushi Usami, Kouji Takegawa
  • Patent number: 8968614
    Abstract: An extensible apertured nonwoven web, and a method for making such an apertured nonwoven web. In one embodiment the method comprises the steps of providing an apertured nonwoven web, incrementally stretching it in a direction substantially parallel to the cross machine direction, and applying tension in the machine direction such that the web width after applying tension is less than the web width after incremental stretching.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: March 3, 2015
    Assignee: The Procter & Gamble Company
    Inventors: Fred N. Desai, Hiroshi Nakahata, John J. Curro, Douglas H. Benson
  • Patent number: 8932044
    Abstract: The foil embossing device comprises an embossing roller and two counter-rollers, one of the rollers being driven by a drive and the rollers having a configuration where the teeth, rings, or ridges project from the base cylinder, at least the embossing roller having teeth that project from the base cylinder and at least partly also serve for driving the counter-roller. To increase the uniformity of the embossing of the foil, the embossing roller has a diameter that is reduced by 0.02 to 0.20 mm over a certain length that is at least the same as the width of the foil. The length of the reduced diameter is preferably chosen so as to exceed the width of the foil being printed. Due to this depression, such a device allows a perfectly uniform embossing of foils of any kind independently of the design of the embossing rollers.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: January 13, 2015
    Assignee: Boegli-Gravures S.A.
    Inventor: Charles Boegli
  • Patent number: 8926305
    Abstract: A dispensing mechanism that deploys a roll of web material having slit cuts and expands it into a web with a cellular structure. This is accomplished by mounting the roll of unexpanded web material on an axle that is positioned at a first angle to a guide wheel assembly. That first angle is not perpendicular to the direction of deployment. The material moves through the guide wheel assembly longitudinally in such a way that tension is applied at a second angle to the direction of deployment. This diagonal tension causes the web material to expand and form cells. Single axle as well as multi-axle systems are disclosed. In this way, a plurality of rolls of web material may be deployed and expanded as a single unit.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 6, 2015
    Assignee: KUCHARCO Corporation
    Inventors: Matthew J. Kuchar, David M. Kuchar
  • Publication number: 20150004466
    Abstract: Provided is a method for reproducibly and efficiently producing a polyolefin porous film having a porous structure suitable for a separator for a battery without requiring a special apparatus. The method according to the present invention is a method for producing a polyolefin porous film, the method including conveying a raw material polyolefin sheet having pores into a furnace of a tenter type stretching machine, and tenter-stretching the sheet in a plurality of stretching regions in the furnace to produce a polyolefin porous film, wherein the plurality of stretching regions include at least two stretching regions having different film widening speeds, and the temperature of a stretching region having a high film widening speed is lower than that of a stretching region having a low film widening speed in the at least two stretching regions, and a stretching region having the highest film widening speed is situated in the front stage with respect to a stretching region having the lowest film widening speed.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 1, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Daizaburo Yashiki, Toshiki Innami
  • Patent number: 8840824
    Abstract: Single, continuous PTFE layers having lateral zones of varied characteristics are described. Some of the lateral zone embodiments may include PTFE material having little or no nodal and fibril microstructure. Methods of manufacturing PTFE layers allow for controllable permeability and porosity of the layers, in addition to other characteristics. The characteristics may vary from one lateral zone of a PTFE layer to a second lateral zone of a PTFE layer. In some embodiments, the PTFE layers may act as a barrier layer in an endovascular graft or other medical device.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: September 23, 2014
    Assignee: Trivascular, Inc.
    Inventors: Joseph W. Humphrey, Jeffry B. Skiba
  • Patent number: 8815134
    Abstract: A process for manufacturing a film of ultra-high molecular weight polyolefin comprising: (a) subjecting a starting ultra-high molecular weight polyolefin with a weight average molecular weight of at least 500 000 gram/mole in powder form to a compacting step using an isobaric press; and (b) subjecting the compacted polyolefin to a rolling step and at least one stretching step under such conditions that at no point during the processing of the polymer its temperature is raised to a value above its melting point. The process allows for the manufacture of ultra-high molecular weight polyolefin films of high quality.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: August 26, 2014
    Assignee: Teijin Aramid B.V.
    Inventor: Martinus Wilhelmus Maria Gemma Peters
  • Patent number: 8808602
    Abstract: A method of treating a net (2) formed from interconnecting strands (4a, 4b) of ultra-high-molecular-weight polyethylene (UHMWPE), the net (2) being formed with knotless intersections (6), comprising the steps of: a) heating the net (2) to a temperature of from 80° to 135° C.; b) applying tension to the net (2); c) reducing the temperature to below 80° C.; and d) removing tension from the net (2).
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: August 19, 2014
    Assignee: Amsafe Bridport Limited
    Inventors: Michael Ian Andrewartha, Stephen Lawton
  • Patent number: 8801984
    Abstract: The present invention relates to a multi-layered microporous polyolefin film for a battery separator and a method for preparing the same. The microporous multi-layered film of the present invention has a characteristics to have both the low shutdown temperature conferred by the polyethylene and the high melt fracture temperature conferred by the polypropylene and heat-resistant filler. In addition, it has the high strength and stability conferred by the micropores prepared under wet process and the high permeability and high strength conferred by the macropores prepared under dry process. Therefore, this multi-layered film can be used effectively to manufacture a secondary battery with high capacity and high power.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: August 12, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Jang-Weon Rhee, Inhwa Jung, Gwigwon Kang, Youngkeun Lee
  • Patent number: 8795565
    Abstract: A microporous membrane is made by a dry-stretch process and has substantially round shaped pores and a ratio of machine direction tensile strength to transverse direction tensile strength in the range of 0.5 to 5.0. The method of making the foregoing microporous membrane includes the steps of: extruding a polymer into a nonporous precursor, and biaxially stretching the nonporous precursor, the biaxial stretching including a machine direction stretching and a transverse direction stretching, the transverse direction including a simultaneous controlled machine direction relax.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: August 5, 2014
    Assignee: Celgard LLC
    Inventors: Xiangyun Wei, Charles Haire
  • Patent number: 8790559
    Abstract: Provided is a method of manufacturing a microporous polyolefin film useable as a battery separator, which is easy to control strength, permeability and shrinking properties of the microporous film and embodies excellent quality uniformity and production stability in fabricating the microporous film.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: July 29, 2014
    Assignee: SK Innovation Co., Ltd.
    Inventors: Gwi Gwon Kang, Jang-Weon Rhee, In Hwa Jung
  • Publication number: 20140203476
    Abstract: A method of treating a net (2) formed from interconnecting strands (4a, 4b) of ultra-high-molecular-weight polyethylene (UHMWPE), the net (2) being formed with knotless intersections (6), comprising the steps of: a) heating the net (2) to a temperature of from 80° to 135° C.; b) applying tension to the net (2); c) reducing the temperature to below 80° C.; and d) removing tension from the net (2).
    Type: Application
    Filed: July 12, 2011
    Publication date: July 24, 2014
    Inventors: Michael Ian Andrewartha, Stephen Lawton
  • Patent number: 8728372
    Abstract: Thin PTFE layers are described having little or no node and fibril microstructure and methods of manufacturing PTFE layers are disclosed that allow for controllable permeability and porosity of the layers. In some embodiments, the PTFE layers may act as a barrier layer in an endovascular graft or other medical device.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: May 20, 2014
    Assignee: TriVascular, Inc.
    Inventors: Joseph W. Humphrey, Jeffrey B. Skiba
  • Patent number: 8663530
    Abstract: A water-proof sound-transmitting membrane 10 includes a polytetrafluoroethylene porous membrane 1 and has a surface density of 1 to 20 g/m2. The polytetrafluoroethylene porous membrane 1 includes a first porous layer 1a, and a second porous layer 1b stacked on and integrated with the first porous layer 1a by a binding force acting between polytetrafluoroethylene matrices.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: March 4, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Yuri Horie, Kouji Furuuchi
  • Patent number: 8664128
    Abstract: An elastic laminate for use as a tear resistant diaper side panel. The elastic laminate comprises an elastic substrate bonded to at least one layer of a tensioned spunbond nonwoven web comprising thermoplastic filaments comprising at least about 10% by weight polyethylene. The laminate is then incrementally stretched in the transverse direction to provide a service stretch greater than 100% and a strength ratio greater than 0.35. In one embodiment, the elastic substrate is bonded between the tensioned nonwoven webs by point bonding or hot melt adhesives.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: March 4, 2014
    Assignee: Advantage Creation Enterprise LLC
    Inventor: James W. Cree
  • Patent number: 8617445
    Abstract: The present invention provides a process for producing an oriented thermoplastic polyester resin sheet which is excellent in tensile strength, tencile modulas and heat resistance, and a light laminate-molded body using the same, which has a low linear expansion coefficient and is excellent in impact resistance, durability, easiness of handling, productivity, and others. A process for producing an oriented thermoplastic polyester resin sheet, which includes: pultrusion-drawing a thermoplastic polyester resin sheet in an amorphous state at a temperature from the glass transition temperature of the thermoplastic polyester resin ?20° C. to the glass transition temperature of the thermoplastic polyester resin +20° C.; and then drawing the resultant uniaxially at a temperature higher than the temperature for the pultrusion-drawing. A laminate-molded body, wherein a thermoplastic resin layer is laminated on each of the surfaces of the resultant oriented thermoplastic polyester resin sheet.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: December 31, 2013
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Shigeru Ogasawara, Hirotsugu Yoshida, Hisashi Eguchi, Ryuichi Matsuo
  • Patent number: 8529817
    Abstract: The present invention provides a stretched thermoplastic resin foam sheet that has excellent flexibility even compressed to a thickness as thin as about 0.05 mm, and a method for producing the same. The stretched thermoplastic resin foam sheet of the present invention is producible by stretching a thermoplastic resin foam sheet and has a compressive strength of 1 to 500 kPa as measured in accordance with JIS K6767 when compressed in a thickness direction thereof to a thickness of 0.05 mm. Accordingly, the stretched thermoplastic resin foam sheet has excellent flexibility even compressed to a thickness as thin as about 0.05 mm and is suitably used as a sealing material for a small electronic device such as mobile phones.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: September 10, 2013
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Takumei Uno, Eiji Tateo, Futoshi Kanazawa
  • Patent number: 8435432
    Abstract: Retardation expressibility of a transparent polymer film can be easily controlled by heat treatment of the film at a temperature T (unit, ° C.) satisfying a condition of the following formula (1): Tc?T<Tm0??Formula (1) wherein Tc represents the crystallization temperature (unit, ° C.) of the film before the heat treatment; and Tm0 represents the melting point (unit, ° C.) of the film before the heat treatment.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: May 7, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Yasuyuki Sasada
  • Patent number: 8323547
    Abstract: Disclosed in the present invention are a microporous polyethylene film and a method of manufacture thereof. The polyethylene microporous film manufactured according to the present invention may contribute to an increased productivity of stable products as its extrusion and stretching may be done readily. And thus manufactured product may be used for battery separators and various filters owing to its high gas permeability, superior puncture strength, and small ratio of shrinkage.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: December 4, 2012
    Assignee: SK Innovation Co., Ltd.
    Inventors: Young-Keun Lee, Jang-Weon Rhee, Jung-Moon Sung, Byoung-Cheon Jo, Chol-Ho Lee, Gwi-Gwon Kang, In-Hwa Jung, Je-An Lee
  • Patent number: 8309256
    Abstract: Provided is a microporous film formed of a thermoplastic resin composition comprising 100 parts by mass of (a) a polyolefin resin and from 5 to 90 parts by mass of (b) a polyphenylene ether resin; the microporous film having a sea-island structure with the polyolefin resin as a sea portion and with the polyphenylene ether resin as an island portion and having a air permeability of from 10 sec/100 cc to 5000 sec/100 cc. The microporous film does not break easily even at high temperatures and has good heat resistance.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: November 13, 2012
    Assignee: Asahi Kasei E-materials Corporation
    Inventors: Kentaro Kikuchi, Shunichiro I
  • Patent number: 8303294
    Abstract: An apparatus for simultaneously activating two or more portions of a web in different directions. The apparatus includes a pair of intermeshing activation rolls with three-dimensional surface features disposed thereon. The three dimensional surface features are arranged in discrete regions on the rolls such that at least two of the regions provide different directions of activation. The rolls include one or more buffer regions positioned between the discrete regions on the roll that provide different directions of activation.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: November 6, 2012
    Assignee: The Procter & Gamble Company
    Inventors: Khalid Qureshi, Fred Naval Desai
  • Patent number: 8272517
    Abstract: The present invention provides a water-proof sound-transmitting membrane including a polytetrafluoroethylene (PTFE) porous membrane, in which the waterproofness is enhanced further with little lowering of the sound transmittance. The water-proof sound-transmitting membrane includes the PTFE porous membrane. The PTFE porous membrane includes a first porous layer, and a second porous layer stacked on and integrated with the first porous layer by a binding force acting between PTFE matrices. The first porous layer and the second porous layer each are composed of PTFE with a number-average molecular weight of 5.0×107 or more determined by a standard specific gravity method. At least one layer selected from the first porous layer and the second porous layer has an average pore diameter of 1 ?m or less. The water-proof sound-transmitting membrane has a surface density of 1 g/m2 to 10 g/m2.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: September 25, 2012
    Assignee: Nitto Denko Corporation
    Inventors: Yuri Horie, Yuuichi Abe, Kouji Furuuchi, Kousei Takiishi
  • Patent number: 8262973
    Abstract: The present invention is related to microporous polyolefin films that may be used for battery separators and the methods of manufacturing the same. These microporous polyolefin films are characterized by being manufactured in a method comprising the steps of melt-extruding a composition, comprised of 20-50 weight % of a resin composition, comprised of 90-98 weight % of polyethylene (Component I) having a weight average molecular weight of 2×105˜4×105 and less than 5 weight % of molecules of which molecular weight is less than 1×104 and less than 5 weight % of molecules of which molecular weight is greater than 1×106, and 2-10 weight % of polypropylene (Component II) of which weight average molecular weight is 3.0×104˜8.0×105 and the peak of the melting point is higher than 145° C., and 80-50 weight % of a diluent (Component III), to mold in the form of sheets; stretching the above sheets to the form of films; extracting the diluent from the above films; and heat-setting the above films.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: September 11, 2012
    Assignee: SK Innovation Co., Ltd.
    Inventors: Young-Keun Lee, Jang-Weon Rhee, Gwi-Gwon Kang, In-Hwa Jung, Je-An Lee
  • Patent number: 8257624
    Abstract: A method for making a porous material, includes melt-blending two or more non-miscible polymers to obtain a co-continuous melt, solidifying the melt to obtain a solid mass consisting of two co-continuous polymer phases, and selectively extracting one of the co-continuous phases thereby creating within the solid mass an essentially continuous pore network having an internal surface. The method further includes replicating the internal surface of the pore network within the solid mass by coating the internal surface with successive layers of materials, and selectively extracting the solid mass without extracting the layers of materials, to thereby yield the product porous material, formed of the layers of materials. The material has a void fraction higher than about 75%, and mainly having essentially fully interconnected sheath-like non-spherical pores and essentially non-fibrous walls.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: September 4, 2012
    Inventors: Basil D. Favis, Pierre Sarazin, Xavier Roy
  • Patent number: 8246886
    Abstract: A method and system for aligning nanotubes within an extensible structure such as a yarn or non-woven sheet. The method includes providing an extensible structure having non-aligned nanotubes, adding a chemical mixture to the extensible structure so as to wet the extensible structure, and stretching the extensible structure so as to substantially align the nanotubes within the extensible structure. The system can include opposing rollers around which an extensible structure may be wrapped, mechanisms to rotate the rollers independently or away from one another as they rotate to stretch the extensible structure, and a reservoir from which a chemical mixture may be dispensed to wet the extensible structure to help in the stretching process.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: August 21, 2012
    Assignee: Nanocomp Technologies, Inc.
    Inventors: David S. Lashmore, Robert Braden, Anastasios John Hart, John Welch
  • Patent number: 8163217
    Abstract: This invention relates to a method of making a heat-resistant transparent container which involves the steps of: a primary stretching and heat-setting process wherein an amorphous polyethylene terephthalate sheet is heated, primarily stretched and then primarily heat-set and a secondary stretching and heat-setting process wherein the sheet treated in the primary stretching and heat-setting process is molded with heating in a mold of a thermoforming machine while secondary stretching is performed, followed by secondary heat-setting in the same mold.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: April 24, 2012
    Assignee: Nakamoto Packs Co., Ltd.
    Inventors: Shigeru Takaoka, Hiroshi Shibano, Jun Kawata
  • Patent number: 8153041
    Abstract: To provide a membrane capable of efficiently collecting fine particles for a long period of time, disclosed is a polytetrafluoroethylene microporous membrane wherein the mean pore size in the surface of the membrane is larger than the mean pore size in the back thereof and the mean pore size continuously changes from the surface toward the back.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: April 10, 2012
    Assignee: FUJIFILM Corporation
    Inventors: Hidetaka Okada, Kouhei Kawahara, Toshiki Taguchi
  • Patent number: 8151998
    Abstract: To provide a crystalline polymer microporous membrane including: a microstructure on the side of one surface of the membrane, the microstructure being composed of series of nodules interconnected with one another by fibrils, wherein the average pore diameter at the one surface of the membrane is larger than the average pore diameter at another surface of the membrane, and the average pore diameter continuously changes from the one surface toward the other surface, and wherein the nodules have an aspect ratio (length/width) of 25 or greater.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: April 10, 2012
    Assignee: Fujifilm Corporation
    Inventor: Hirohisa Hokazono
  • Patent number: 8114326
    Abstract: A cellulose ester film has a front retardation Re of from 20 nm to 100 nm relative to light having a wavelength of 590 nm at 25° C. and 60% RH; a retardation Rth in a film thickness direction of from 60 nm to 400 nm relative to light having a wavelength of 590 nm at 25° C. and 60% RH; and a shrinkage factor in a slow axis direction of less than 1% in the range of from a glass transition temperature to a temperature of 40° C. higher than a glass transition temperature.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: February 14, 2012
    Assignee: Fujifilm Corporation
    Inventor: Katsumi Sasata
  • Patent number: 8097200
    Abstract: A method for producing a stretched film comprising supplying a film composed of a thermoplastic resin along a direction D1 that is different from a taking-up direction D2 of a post-stretch film, and obliquely stretching the film while transferring the film with the edges thereof being gripped by gripping devices, to produce the stretched film having an orientation angle ? being within 45±5° with respect to the taking-up direction.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: January 17, 2012
    Assignee: Zeon Corporation
    Inventor: Takeshi Asada
  • Patent number: 8092581
    Abstract: A gas separation membrane has: a polymeric microporous membrane which has a polyolefin as a main component, and which is manufactured by wet phase separation process, and has a porosity of 20 to 80%, an average pore diameter of 1 to 100 nm and a piercing strength at 100° C. of 2 to 50 N; and a gas-separating thin film, which is provided on at least one surface, and/or the interior of the polymeric microporous membrane, and which comprises a fluorine-containing gas-separating resin as a main component, and has an average thickness of 0.01 ?m to less than 0.4 ?m. The gas separation membrane having an oxygen-nitrogen separation factor not smaller than 1.4.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: January 10, 2012
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Sho Sugiyama, Takuya Hasegawa, Takahiko Kondo, Hidetoshi Masugi, Takashi Nozaki
  • Patent number: 8071006
    Abstract: The present application thus provides a composite composition comprising PTFE and zeolite. According to another aspect, the present application provides a method for making a composite article comprising bonding zeolite to PTFE. According to still yet another aspect of the present application, a method for separating components of the mixture comprising contacting the mixture with a composite composition comprising PTFE and zeolite is disclosed.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: December 6, 2011
    Assignee: General Electric Company
    Inventor: Gopakumar Thottupurathu
  • Patent number: 8034280
    Abstract: Catheters, balloons, and methods of manufacturing balloons for balloon catheters using lasers are disclosed. A catheter with a shaft sized for use with a 0.014 inch guide wire includes a polymeric balloon having a body portion with an inflated outer diameter of more than 6 millimeters. An inflatable balloon includes an inflated outer diameter to inner waist diameter ratio of 12.5 to 1. An inflatable polymeric balloon that has a body portion with two regions that have different molecular orientations is also provided. A method of processing an elongate polymeric material includes heating a portion of the polymeric material with a laser while longitudinally stretching the portion of the polymeric material. A method of manufacturing a balloon includes heating and longitudinally stretching a first and second portion of an elongate polymeric tube to form first and second end portion. The remaining body portion is radially expanded to form the balloon.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: October 11, 2011
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Afsar Ali, Daniel J. Horn, Jan Weber, Scott Schewe
  • Patent number: 8012388
    Abstract: A stretchable sheet having a large stretch amount is produced by increasing a drawing amount given to the nonwoven fabric. A method for producing the stretchable sheet from a nonwoven fabric containing a plurality of types of fibers, that is the nonwoven fabric having a longitudinal direction, a width direction and a thickness direction. The method includes a first drawing step of drawing the nonwoven fabric in the longitudinal direction by applying a tension in the longitudinal direction of the nonwoven fabric, and a second drawing step of drawing, in the longitudinal direction, the nonwoven fabric that has been drawn in the first drawing step with a plurality of teeth formed on outer circumferential faces of each of a pair of gear rolls, the drawing being performed by passing the nonwoven fabric through a gap between the gear rolls that rotate while the teeth are being engaged with one another.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: September 6, 2011
    Assignee: Uni-Charm Corporation
    Inventors: Kenichi Akaki, Yoshihiko Matsumoto, Shinichi Ishikawa
  • Patent number: 7998380
    Abstract: A method of fabricating a highly porous structure is provided. The method includes the step of compounding a biodegradable polymer, a water-soluble polymer and a porogen to form a composite blend. A foaming agent is dissolved into the composite blend and the composite blend is injected into a mold so as to form the structure. Thereafter, the structure is removed from the mold and leached in a fluid.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: August 16, 2011
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Lih-Sheng Turng, Adam J. Kramschuster
  • Publication number: 20110117439
    Abstract: The invention relates to microporous polymeric membranes suitable for use as battery separator film. The invention also relates to a method for producing such a membrane, batteries containing such membranes as battery separators, methods for making such batteries, and methods for using such batteries.
    Type: Application
    Filed: June 24, 2009
    Publication date: May 19, 2011
    Applicant: TORAY TONEN SPECIALITY GODO KAISHA
    Inventors: Kazuhiro Yamada, Teiji Nakamura
  • Patent number: 7942275
    Abstract: A method of making a porous membrane includes, in an exemplary embodiment, mixing together a first fine powder PTFE resin and a second fine powder PTFE resin to form a PTFE resin mixture. The first PTFE resin having a characteristic of forming more and longer fibrils than fibrils formed from the second PTFE resin. The second PTFE resin having a characteristic of forming thicker nodes than nodes formed from the first PTFE resin. The method also includes forming a preform from the PTFE resin mixture, extruding the preform into a tape, passing the tape through a plurality of opposing calender rolls to form a calendered tape having a thickness of about 380 ?m to about 1200 ?m, and stretching the calendered tape in the transverse direction to form a porous membrane having a plurality of nodes and fibrils and having a thickness of at least about 100 ?m.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: May 17, 2011
    Assignee: BHA Group, Inc.
    Inventor: Gopakumar Thottupurathu