With Processing Before Extrusion Or Inclusion Of Additive Patents (Class 264/210.6)
  • Patent number: 6921504
    Abstract: A method for producing a flame retarding polypropylene fiber having both good flame retardancy and good fiber strength, and which generates no toxic gas, includes mixing 0.4% by wt. or more of a hindered amine-based stabilizer and 0.5% by wt. or more of a phosphoric ester-based flame retardant with a polypropylene resin having an MPR of 5 to 50 g/10 min, melt-spinning the mixture to form an undrawn yarn, drafting the yarn at a drafting magnification of 2 to 7 fold and a drafting temperature of 50 to 100° C., and further thermally setting at 60 to 140° C.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: July 26, 2005
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Yoshishige Shimizu, Hiroshi Yamamoto, Hideo Sakakura
  • Patent number: 6899836
    Abstract: The present invention relates to methods for making polyamide filaments, such as nylon 6,6, having high tensile strength. The invention also relates to yarns and other articles formed from such filaments. The invention is particularly useful for providing a filament yarn with tenacity equal or superior to the prior art at high spinning process speeds while retaining the ability to draw the yarn. The invention further relates to providing a filament yarn extruded from a delustered or pigmented polyamide polymer.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: May 31, 2005
    Assignee: Invista North America S.a r.l.
    Inventors: K Ranjan Samant, George Vassilatos
  • Patent number: 6878330
    Abstract: Methods for the use of laser beams in the case of plastic monofilaments are proposed. For structural modifying monofilaments or individual monofilaments of a monofilament union, the monofilament to be structurally modified is extruded with LS-absorbing additives and subsequently treated with laser beams.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: April 12, 2005
    Assignee: Coronet-Werke GmbH
    Inventor: Georg Weihrauch
  • Patent number: 6872351
    Abstract: Methods for the use of laser beams in the case of plastic monofilaments are proposed. For the optical marking of extruded monofilaments or individual monofilaments of a monofilament union, at least the monofilament to be marked, accompanied by the addition of additives reacting with a color change under laser action, are extruded and treated with laser beams in the areas corresponding to the desired marking.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: March 29, 2005
    Assignee: Coronet-Werke GmbH
    Inventor: Georg Weihrauch
  • Patent number: 6863513
    Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: March 8, 2005
    Assignee: General Electric Company
    Inventors: Bruce Boudreau, Teresa Grocela-Rocha, Edward M. Jeram, August O. Liermann, Gerardo Rocha-Galicia, David A. Williams
  • Patent number: 6852270
    Abstract: A drawn film production method including steps of drawing a crystalline thermoplastic resin film in the TD direction is characterized in that the orientation coefficient of the c-axis of the crystal of the thermoplastic resin in the film to the MD direction of the film is 0.8 or higher.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: February 8, 2005
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Atsuhiro Takata, Ryuma Kuroda, Satoshi Hanada, Takeshi Yamada
  • Publication number: 20040232587
    Abstract: The invention is directed to methods involving rewetting of expandable polymers with a wettable liquid to allow for enhanced expansion at or below room temperature without breakage, and in some cases, allows one to achieve a greater expansion ratio than that allowed at elevated temperatures using known methods. The wettable liquid can be formed of a drug and/or an agent, such that the resulting polymer contains and emits the drug upon positioning at a target location of a patient body. The expandable polymer can also have the drug or agent added to its structure at a polymer resin preparation stage, through use of an aqueous solution mixed with one or more fluoropolymers, or in a mixing stage. The present invention also allows one to achieve material with unique properties and handling characteristics. These properties included decreased material thickness, increased density, an altered node/fibril morphology, and a more consistent web in the case of flat material.
    Type: Application
    Filed: March 23, 2004
    Publication date: November 25, 2004
    Applicant: ATRIUM MEDICAL CORP.
    Inventors: Paul Martakos, Roger Labrecque, Geoffrey Moodie, Steve A. Herweck, Theodore Karwoski
  • Patent number: 6793854
    Abstract: A method and an apparatus for making a plastic film, and to a plastic film wherein the method includes extruding a film from plastic material by an extruder and orientating the film after extrusion. Material is mixed into the plastic so that when the plastic film is stretched, cavitation bubbles are formed in the material particles mixed into the plastic. After orientation, gas is arranged to act on the plastic film under high pressure so that the gas diffuses in the cavitation bubbles and causes overpressure in them. Thus it is possible to make a thin foamed film with a foaming degree of over 70%.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: September 21, 2004
    Assignee: Conenor Oy
    Inventor: Kari Kirjavainen
  • Patent number: 6790405
    Abstract: An embossed, cast polyolefin film or an embossed, oriented polyolefin film includes: (a) a core layer including a propylene polymer; (b) an embossed outer layer on one side of the core layer, the embossed outer layer including an olefin polymer capable of being embossed; and (c) an additional outer layer on a side of the core layer opposite to the embossed outer layer, the additional outer layer including an olefin polymer. The embossed film can then be metallized to produce a shiny, metallic film having a prismatic or holographic appearance.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: September 14, 2004
    Assignee: ExxonMobil Oil Corporation
    Inventors: Robert Andrew Migliorini, Christopher Nothnagle, Salvatore James Pellingra, Jr.
  • Patent number: 6780361
    Abstract: A method including forming a pseudo-gel of a semi-crystalline polymer material and a solvent. The pseudo-gel is shaped into a first form and stretched. A portion of the solvent is removed to create a second form. The second form is stretched into a microstructure including nodes interconnected by fibrils. A method including forming a first form of a pseudo-gel including an ultra-high molecular weight polyethylene material and a solvent; stretching the first form; removing the solvent to form a second form; stretching the second form into a microstructure including nodes interconnected by fibrils; and annealing the stretched second form. An apparatus including a body portion formed of a dimension suitable for a medical device application and including a polyolefin polymer including a node and a fibril microstructure. An apparatus including a body portion including an ultra-high molecular weight polyolefin material including a node and a fibril microstructure.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: August 24, 2004
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Srinivasan Sridharan, Murthy V. Simhambhatla
  • Patent number: 6767618
    Abstract: A multi-layered stretched resin film comprises a base layer (A) comprising more than 90 wt % of a polyolefinic resin and less than 10 wt % of an inorganic fine powder and/or an organic filler; and an amorphous resin-containing layer (B), comprising 0 to 85 wt % of a second polyolefinic resin, which may be the same or different than the first polyolefinic resin, and 15 to 100 wt % of an amorphous resin. The amorphous resin-containing layer (B) is disposed on at least one side of the base layer (A), and has a porosity of 5% or less. Such multi-layered stretched resin films are resistant to waving or curling caused by exposure to the vehicle component of offset printing inks during offset printing, and therefore have excellent printing properties.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: July 27, 2004
    Assignee: Yupo Corporation
    Inventors: Atsushi Ishige, Kazuhisa Kitamura
  • Publication number: 20040142194
    Abstract: The invention relates to a transparent, biaxially oriented polyester film which comprises at least 80% by weight of thermoplastic polyester and also comprises an amount in the range from 0.05 to 0.5% by weight of a specific pigment system. The invention further relates to a process for producing the film. The film can be used as a packaging film, or for metalizing or ceramic coating, and in applications in the industrial sector, as a substrate for stamping foils.
    Type: Application
    Filed: December 18, 2003
    Publication date: July 22, 2004
    Inventors: Herbert Peiffer, Martin Mueller-Roosen, Gottfried Hilkert
  • Publication number: 20040119208
    Abstract: A method for making a polymeric web exhibiting a soft and silky tactile impression on at least one side thereof. The method comprises the steps of providing a forming structure being moveable upon a forming drum and comprising a plurality of protrusions extending from the forming structure, the protrusions being generally columnar forms having an average aspect ratio of at least about 1. The forming structure is disposed adjacent a vacuum chamber and vacuum is applied at a sufficient level to induce a sufficient partial pressure to conform a precursor web to the forming structure, thereby forming the polymeric web. The precursor web can be cast directly onto the forming structure, or it can be re-heated by re-heat means to elevate its temperature sufficiently to permit vacuum formation.
    Type: Application
    Filed: March 14, 2003
    Publication date: June 24, 2004
    Applicant: The Procter & Gamble Company
    Inventors: Brian Francis Gray, Keith Joseph Stone
  • Patent number: 6733719
    Abstract: A method of making a polypropylene product for use in making films and preferably biaxially oriented films and more preferably biaxially oriented films wherein a tenter-frame processing line is employed. The method includes the addition of low concentrations of a nucleating system in a mini-random polypropylene that allows for better processability and improved tensile properties. In one embodiment the nucleating system comprises a blend of a monocarboxylic acid nucleating agent and dicarboxylic acid nucleating agent. The nucleating system is combined with the polypropylene material and the resultant hot melt blend is further processed into biaxially oriented film. Alternately, the hot melt blend is formed into a convenient raw material for later use in a biaxial oriented film production facility. The resulting films possess superior processing and material characteristics.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: May 11, 2004
    Assignee: Sunoco Inc. (R&M)
    Inventors: Victor M. DiNardo, Nicholas Z. Karnavas
  • Patent number: 6719937
    Abstract: The invention relates to a process for manufacturing polyamide fibers having properties suitable and compatible for use as fibers for the manufacture of felt for paper machines. The process of the invention relates more particularly to the addition of stabilizers to the polyamide in order to obtain polyamide fibers having high properties, especially high resistance to light, heat and aggressive environments. The process of the invention consists in adding the stabilizer directly to the polyamide, without producing a preblend, and then in mixing the polyamide with the additive in an extruder for feeding the composition into a die for obtaining filaments.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: April 13, 2004
    Assignee: Rhodia Performance Fibres
    Inventors: Hartmut Kratzke, Jürgen Lasch
  • Patent number: 6706228
    Abstract: Polyolefin/filler breathable films may be produced by machine or transverse direction orientation using interdigitating grooved rollers. Biaxial orientation to similarly produce breathable films may be accomplished by the same method. By heating the rollers, the breathability of the film is increased without increasing the depth of engagement of the interdigitating rollers.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: March 16, 2004
    Assignee: ExxonMobil Chemical Company
    Inventor: John H. Mackay
  • Patent number: 6689297
    Abstract: A method of manufacturing a magnetic rubber ring comprises: providing an unvulcanized rubber containing rubber materials and magnetic powers; using an extruding machine to extrude the unvulcanized rubber into a rubber band having a nearly round cross section; cutting the rubber band into a strip of rubber band of a predetermined length; forming a rubber band ring by joining opposite ends of the strip of rubber band together, wherein the opposite ends of the strip of rubber band have respective meeting slanted faces cut at a predetermined angle such that a joint of the rubber band ring obtained by joining the opposite ends of the strip of rubber band become thinner in a direction of compression when the rubber band ring is compressed in a direction of its center line; and compressing the rubber band ring under applied heating in the direction of the center line.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: February 10, 2004
    Assignee: Uchiyama Manufacturing Corp.
    Inventors: Hideo Mizuta, Tsukasa Horichi, Yoshihiko Yamaguchi
  • Patent number: 6676871
    Abstract: The invention concerns a method for producing a microporous film with strong isotropic tendency permeable to gases and impermeable to aqueous liquids, consisting of at least one layer, comprising the following successive steps: preparing a mixture consisting of a polyolefin matrix containing at least a polymer and at least a mineral and/or organic filler; extruding at least a ply by hot-casting the mixture; pre-stretching the ply with a drag roll; cooling and solidifying the pre-stretched ply, using the drag roll; drawing the solidified ply at sufficient temperature for forming the microporous film.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: January 13, 2004
    Assignee: Ace S.A.
    Inventors: Guy Benassi, Christian Dubouchet, Michel Gillet, Guy Pinchard
  • Patent number: 6669888
    Abstract: Process of making polypropylene fibers obtained from an isotactic polypropylene homopolymer with an isotactic index of 90-99%, through melt-spinning or through drawing after melt-spinning, and shows two differential scanning calorimeter (DSC) endothermic peaks between 155 and 170 ° C. When being thermally bonded with each other, the fibers are made into non-woven fabrics which have excellent strength in addition to being soft. A high quality of the non-woven fabrics can be produced in a high speed carding machine with high yields.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: December 30, 2003
    Inventors: Pyung Yul Park, Won Jun Chey
  • Patent number: 6667096
    Abstract: The present invention relates to a process for the production and for the spooling of preoriented polyester filaments comprising at least 90 weight %, relative to the total weight of the polyester filament, of polybutylene terephthalate (PBT) and/or polytrimethylene terephthalate (PTMT), preferably of PTMT, characterized in that: a) the spinline extension ratio is set in the range of 70 to 500; b) the filaments, immediately after exiting from the spinning nozzles, pass through a cooling delay zone from 30 mm to 200 mm in length; c) the filaments are cooled off to below the solidification temperature; d) the filaments are bundled at a distance of between 500 mm and 2500 mm from the lower side of the spinneret plate; e) the tension of the thread in front of and between the draw-off galettes is set to between 0.05 cN/dtex to 0.20 cN/dtex; f) the thread is spooled with a tension of the thread of between 0.025 cN/dtex to 0.15 cN/dtex; g) the spooling speed is adjusted to between 2200 m/min. and 3500 m/min.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: December 23, 2003
    Assignee: Zimmer A.G.
    Inventors: Dietmar Wandel, Achim Dulling, Ulrich Mirwaldt, Alexander Klein
  • Patent number: 6656404
    Abstract: Improved polypropylene fibers exhibiting greatly reduced heat- and moisture-shrink problems and including certain compounds that quickly and effectively provide rigidity to the target polypropylene fiber after heat-setting are disclosed herein. In such a manner, the “rigidifying” compounds provide nucleation sites for polypropylene crystal growth. After drawing the nucleated composition into fiber form, the fiber is then exposed to sufficient heat to grow the crystalline network, thus holding the fiber in a desired position. The preferred “rigidifying” compounds include dibenzylidene sorbitol based compounds, as well as less preferred compounds, such as sodium beuzoate, certain sodium and lithium phosphate salts (such as sodium 2,2′-methylene-bis-(4,6-di-tert-butylphenyl)phosphate, otherwise known as NA-11).
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: December 2, 2003
    Assignee: Milliken & Company
    Inventors: Brian G. Morin, Nathan A. Mehl, William S. Parks
  • Publication number: 20030220433
    Abstract: The invention relates to a raw material or masterbatch made from a thermoplastic and comprising silicon compounds, to a process for its production, and also to films produced using the polymer and having a thickness in the range from 0.5 to 1 000 &mgr;m. The polymer or masterbatch also comprises at least one stabilizer/free radical scavenger. The invention further relates to a process for producing the film.
    Type: Application
    Filed: September 12, 2002
    Publication date: November 27, 2003
    Inventors: Holger Kliesch, Bodo Kuhmann, Ursula Murschall, Rainer Kurz, Ulrich Kern
  • Publication number: 20030168773
    Abstract: A method for manufacturing sheet-like elements made of plastics, particularly nets and the like, comprising the step of: extruding mixtures based on fully biodegradable thermoplastic material at a temperature between 70 and 100° C. at the beginning of the extrusion process and between 120 and 140° C. at the end of the extrusion process; maintaining an extrusion pressure between 20 and 50 bar; and performing at least one stretching in a preset direction at a temperature between 35 and 60° C.
    Type: Application
    Filed: March 5, 2003
    Publication date: September 11, 2003
    Applicant: TENAX S.p.A.
    Inventor: Mario Beretta
  • Patent number: 6613257
    Abstract: A process for making load limiting yarn comprising making block copolymer and then spinning the block copolymer into yarn. The process employs a twin screw extruder and comprises (A) forwarding aromatic polyester melt to an injection position in a twin screw extruder, (B) injecting lactone monomer into the molten aromatic polyester, (C) dispersing the monomer into the aromatic polyester melt so that a uniform mixture forms in less than about thirty seconds, and (D) reacting the uniform mixture resulting from step (C) at a temperature from about 250° C. to from a block copolymer. Steps (A) through (D) occur in less than about four minutes residence time in the twin screw extruder. The process is advantageous because high IV starting aromatic polyester can be used and the short reaction time at high temperature results in block copolymer with minimum transesterification, a high melting point, and a high melt viscosity.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: September 2, 2003
    Assignee: AlliedSignal Inc.
    Inventors: Weiming Tang, Frank Mares, Robert Clark Morgan
  • Patent number: 6613268
    Abstract: A method for producing super fine meltblown fibers increases the length of the meltblown jet thermal core to increase the dwell time of the extruded thermoplastic polymer within the jet thermal core. Through use of the method it is practical to use low viscosity resins and further to provide meltblown nonwovens with superior barrier properties to the passage of fluids and particularly gases. The method further provides a useful means for blooming internal additives to the surface of the fibers.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: September 2, 2003
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Bryan David Haynes, Jeffrey Lawrence McManus, Justin Max Duellman, Darryl Franklin Clark, Roger Bradshaw Quincy, III
  • Publication number: 20030151162
    Abstract: A method of making a polypropylene product for use in making films and preferably biaxially oriented films and more preferably biaxially oriented films wherein a tenter-frame processing line is employed. The method includes the addition of low concentrations of a nucleating system in a mini-random polypropylene that allows for better processability and improved tensile properties. In one embodiment the nucleating system comprises a blend of a monocarboxylic acid nucleating agent and dicarboxylic acid nucleating agent. The nucleating system is combined with the polypropylene material and the resultant hot melt blend is further processed into biaxially oriented film. Alternately, the hot melt blend is formed into a convenient raw material for later use in a biaxial oriented film production facility. The resulting films possess superior processing and material characteristics.
    Type: Application
    Filed: January 14, 2002
    Publication date: August 14, 2003
    Inventors: Victor M. DiNardo, Nicholas Z. Karnavas
  • Publication number: 20030127768
    Abstract: Improvements in preventing heat- and moisture-shrink problems in specific polypropylene tape fibers are provided. Such fibers are basically manufactured through the initial production of polypropylene films or tubes which are then slit into very thin, though flat (and having very high cross sectional aspect ratios) tape fibers thereafter. Such fibers (and thus the initial films and/or tubes) require the presence of certain compounds that quickly and effectively provide rigidity to the target polypropylene tape fiber after heat-setting. Generally, these compounds include any structure that nucleates polymer crystals within the target polypropylene after exposure to sufficient heat to melt the initial pelletized polymer and upon allowing such a melt to cool. The compounds must nucleate polymer crystals at a higher temperature than the target polypropylene without the nucleating agent during cooling.
    Type: Application
    Filed: December 21, 2001
    Publication date: July 10, 2003
    Inventors: Brian G. Morin, Martin E. Cowan, Kenneth E. Higgins
  • Publication number: 20030129398
    Abstract: The use of a sulfonated salt polyester ionomer resin in a colored, drawn polyamide or polyester fiber results in improved color strength and appearance. Sodium sulfo isophthalate polybutylene terephthalate copolymers when melt blended with colorants and subsequently used to make melt spun synthetic polyamides or polyesters fibers are shown to enhance color strength in drawn fibers.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 10, 2003
    Applicants: GENERAL ELECTRIC COMPANY, PRISMA FIBERS, INC.
    Inventors: Robert R. Gallucci, Matthew B. Studholme, Milton Keith Roark
  • Patent number: 6585920
    Abstract: Embossed oriented thermoplastic films and a method of making same are described. The embossed oriented thermoplastic films have substantially the same mechanical properties as unembossed oriented thermoplastic films. The method includes providing an oriented thermoplastic film having first and second major surfaces, softening at least one of the first and second major surfaces to produce a softened surface, embossing the softened surface to produce an embossed oriented thermoplastic film, and cooling the embossed oriented thermoplastic film.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: July 1, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Joan M. Strobel, Mark A. Strobel, Patrick J. Hager, Ronald S. Kapaun
  • Patent number: 6582634
    Abstract: A method of converting a plastics material into a yarn, in which the plastics material includes one or more polymers selected from the group consisting of nylon, polyesters, polyethylene, polyvinyl chloride, polyphenylene sulphide, polystyrene. The method includes heating the material to melt it, pumping the melted material through an extruder to form an extruded filament, and cooling the extruded filament. The cooled filament is passed through a first draw roller assembly while elevating the temperature of the filament. The filament is then heated in a heating zone as it exits the first draw roller assembly and, thereafter, the filament is passed through a second draw roller assembly operating at a different linear speed to the first draw roller assembly. The filament is spooled after exiting the second draw roller assembly.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: June 24, 2003
    Assignee: Peri-Dent Limited
    Inventors: Ian Roberts, David McKenzie Hill
  • Patent number: 6569527
    Abstract: A method of producing a breathable film which comprises the steps of: (a) producing an inorganic filler by treating particles of an inorganic particulate material comprising an alkaline earth metal carbonate compound by reaction with a hydrophobising surface treatment agent comprising one or more aliphatic carboxylic acids having at least 10 chain carbon atoms to produce a hydrophobic coating on the particles under conditions such that the inorganic filler produced has a total surface moisture level comprising moisture adsorbed on the particles and trapped within the hydrophobic coating thereon of not greater than 0.1% by weight based on the dry weight of the inorganic particulate material; (b) producing a filled thermoplastic composition by mixing the inorganic filler produced in step (a) with a heated thermoplastic polymer; and (c) shaping the composition produced in step (b) by heat processing to form a film product.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: May 27, 2003
    Assignee: Imerys Minerals, Limited
    Inventors: Allison Anne Calhoun, Dickey S. Shurling, David A. Skelhorn, Deeba Marjan Ansari
  • Patent number: 6548574
    Abstract: An untreated filler and a high viscosity silicone polymer premix is charged into a compounding apparatus. Treating agent and additional silicone polymer are added to the premix and the premix, treating agent and additional silicone polymer are compounded to produce a heat vulcanizable filled silicone composition.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: April 15, 2003
    Assignee: General Electric Company
    Inventors: Devesh Mathur, Alan L. Tate
  • Publication number: 20030062650
    Abstract: The invention is directed to methods involving rewetting of expandable polymers with a wettable liquid to allow for enhanced expansion at or below room temperature without breakage, and in some cases, allows one to achieve a greater expansion ratio than that allowed at elevated temperatures using known methods. The wettable liquid can be formed of a drug and/or an agent, such that the resulting polymer contains and emits the drug upon positioning at a target location of a patient body. The present invention also allows one to achieve material with unique properties and handling characteristics. These properties included decreased material thickness, increased density, an altered node/fibril morphology, and a more consistent web in the case of flat material.
    Type: Application
    Filed: April 22, 2002
    Publication date: April 3, 2003
    Applicant: ATRIUM MEDICAL CORPORATION
    Inventors: Paul Martakos, Roger Labrecque, Geoffrey Moodie, Steve A. Herweck, Theodore Karwoski
  • Publication number: 20030047843
    Abstract: Methods for the use of laser beams in the case of plastic monofilaments are proposed. For the optical marking of extruded monofilaments or individual monofilaments of a monofilament union, at least the monofilament to be marked, accompanied by the addition of additives reacting with a color change under laser action, are extruded and treated with laser beams in the areas corresponding to the desired marking.
    Type: Application
    Filed: October 31, 2002
    Publication date: March 13, 2003
    Applicant: Coronet-Werke GmbH
    Inventor: Georg Weihrauch
  • Publication number: 20020190423
    Abstract: Improved polypropylene fibers exhibiting greatly reduced heat- and moisture-shrink problems are provided. Such fibers require the presence of certain compounds that quickly and effectively provide rigidity to the target polypropylene fiber after heat-setting. Generally, these compounds include any structure that nucleates polymer crystals within the target polypropylene after exposure to sufficient heat to melt the initial pelletized polymer and upon allowing such a melt to cool. The compounds must nucleate polymer crystals at a higher temperature than the target polypropylene without the nucleating agent during cooling. In such a manner, the “rigidifying” nucleator compounds provide nucleation sites for polypropylene crystal growth. After drawing the nucleated composition into fiber form, the fiber is then exposed to sufficient heat to grow the crystalline network, thus holding the fiber in a desired position.
    Type: Application
    Filed: May 17, 2001
    Publication date: December 19, 2002
    Inventors: Brian G. Morin, Nathan A. Mehl, William S. Parks
  • Patent number: 6495079
    Abstract: The use of a sulfonated polyester ionomer resin in a colored, drawn polyamide or polyester fiber results in improved color strength and appearance. Sodium sulfo isophthalate polybutylene terephthalate copolymers when melt blended with synthetic polyamides or polyesters are shown to enhance color strength in drawn fibers. In addition the sulfonated polyesters reduce color strength variation in colored fibers made with different batches of colorant. Water insoluble sulfonated polyester ionomers are preferred.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: December 17, 2002
    Assignees: Prisma Fibers, Inc., General Electric Company
    Inventors: Robert R. Gallucci, Matthew B. Studholme, Milton Keith Roark
  • Patent number: 6468583
    Abstract: A tracking resistant electrical insulating material or article suitable for medium to high voltage applications comprising a silane-modified polyolefin, and a heat-shrinkable article prepared therefrom. Said material or article is preferably prepared by a process comprising: (a) reacting polyolefin with a silane in the presence of a free-radical initiator to form a silane-grafted polyolefin, or copolymerising a polyolefin with silane; (b) preparing a mixture of one or more silane-modified polyolefins prepared in (a) with optionally one or more non silane-modified polyolefins, antitrack ingredients, and a silanol condensation catalyst; (c) forming the insulating material or article by melt extruding or moulding said mixture; and (d) crosslinking the insulating material or article by exposing it to moisture, preferably at elevated temperature.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: October 22, 2002
    Assignee: ShawCor Ltd.
    Inventors: Peter Jackson, Marcus P. Heydrich
  • Publication number: 20020149132
    Abstract: The polyolefin [A] has a weight average molecular chain length of 2850 nm or longer and a density &rgr;1 (g/cm3), the polyolefin wax [B] has a weight average molecular weight of 700-6000 and a density &rgr;2 (g/cm3), the polyolefin and the polyolefin wax are incorporated at [A]/[B]=90/10-50/50 (ratio by weight), and the densities &rgr;1 and &rgr;2 satisfy the following conditions: 0.92.≦&rgr;1≦0.94, 0.91≦&rgr;2≦0.93, −0.03≦(&rgr;1-&rgr;2)≦0.03.
    Type: Application
    Filed: March 11, 2002
    Publication date: October 17, 2002
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Atsuhiro Takata, Ryuma Kuroda, Satoshi Hanada, Takeshi Yamada
  • Patent number: 6444154
    Abstract: A continuous process provides a devolatilized liquid injection moldable silicone composition. In the process, a filler, treating agent and silicone polymer are introduced into an extruder having a length to diameter ratio of at least greater than 50. The filler, treating agent and silicone elastomer are continuously compounded in the extruder into a devolatilized liquid injection moldable silicone composition. A system for preparing a liquid silicone rubber composition comprises a mixer to prepare a concentrate of filler and silicone polymer, a long extruder having an L/D ratio of greater than 50, connected to the mixer to receive the concentrate from the mixer and to compound and devolatilize the concentrate, a treating agent and silicone polymer into a liquid silicone rubber composition containing volatiles and a cooler to receive the liquid silicone rubber composition to cool, homogenize and further devolatilized the composition.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: September 3, 2002
    Assignee: General Electric Company
    Inventors: Bruce Boudreau, Teresa Grocela-Rocha, Edward M. Jeram, August O. Liermann, Gerardo Rocha-Galicia, David A. Williams
  • Publication number: 20020119300
    Abstract: An elastic breathable film is disclosed. The film is formed from a thermoplastic elastomer that contains a filler. Once the film is formed, the film is stretched causing the formation of micropores. The thermoplastic elastomer then undergoes phase separation between hard segment blocks and soft segment blocks which restores elasticity to the film. In one embodiment, the thermoplastic elastomer is a thermoplastic polyurethane elastomer.
    Type: Application
    Filed: November 29, 2001
    Publication date: August 29, 2002
    Inventor: Jack D. Taylor
  • Patent number: 6436319
    Abstract: A method for preparing a hollow fiber-type separation membrane from high density polyethylene is provided, which includes the steps of: melt-spinning a mixture of a high density polyethylene and a diluting agent to produce a phase-separated undrawn hollow fiber; detecting a tensile strength of the undrawn fiber during an alternative and repetitive winding and unwinding procedure between two bobbins, said undrawn fiber being drawn during the alternative and repetitive winding and unwinding procedure; reducing a rotation speed of one of the two bobbins when the detected tensile strength is larger than a predetermined value; and increasing a rotation speed of one of the two bobbins when the detected tensile strength is smaller than the predetermined value to yield the hollow fiber-type separation membrane.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: August 20, 2002
    Assignee: Agency for Technology and Standards
    Inventors: Hyang Sun, Yong Sang Yi, Kyu Bong Rhee
  • Publication number: 20020084550
    Abstract: An oral brush is provided that includes an elongated body, a head portion extending from the body, and a plurality of bristles, formed of particular thermoplastic elastomers, extending from the body. In various embodiments, the thermoplastic elastomer has a Shore A hardness of at least 30; the thermoplastic elastomer is selected from the group consisting of polyetheramides, polyesters, styrene-ethylene-butylene-styrene block copolymers, polyurethanes, polyolefin elastomers, and mixtures thereof; and the thermoplastic elastomer has a flexural modulus of at least 5 MPa.
    Type: Application
    Filed: December 26, 2001
    Publication date: July 4, 2002
    Inventors: Michael Roberts, Thomas Craig Masterman, Edward H. Park, Scott Batson, Philip Sweeney, Mingchih M. Tseng, Stephen C. Witkus
  • Patent number: 6391234
    Abstract: High levels of inorganic filler, processing fluid and silicone polymer are compounded and devolatilized into homogeneous filled compositions with requisite reinforcing properties and levels of volatiles. In the method, a filler, processing fluid and silicone polymer are mixed in a first compounding apparatus to produce a dispersed composition containing volatiles. The dispersed composition is then compounded in a long extruder having an L/D ratio of greater than 50 to devolatilize the dispersed composition.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 21, 2002
    Assignee: General Electric Company
    Inventors: Norberto Silvi, Robert Edward Dean, Mark Howard Giammattei, John William Carbone, Navjot Singh, Gerardo Rocha Galicia, John Peter Banevicius
  • Publication number: 20020054472
    Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by paste extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.
    Type: Application
    Filed: November 14, 2001
    Publication date: May 9, 2002
    Applicant: ASAHI GLASS COMPANY LTD.
    Inventors: Takamichi Ishikawa, Satoru Kuroki, Manabu Suhara
  • Publication number: 20020054971
    Abstract: A process is disclosed producing an intermediate transfer member used in an image-forming apparatus in which an image formed on a first image-bearing member is transferred to a second image-bearing member. The process has the steps of melt-extruding an extrusion material from a circular die by means of an extruder and thereafter making the same into a desired shape to obtain a cylindrical extruded product, and forming the resultant cylindrical extruded product into the intermediate transfer member. The cylindrical extruded product contains a thermoplastic resin and an ion-conductive resistance control agent, and a ratio of the diameter of the intermediate transfer member obtained to the die diameter of the circular die is from 0.5 to 4.0. Also disclosed are an intermediate transfer member obtained by the production process, and an intermediate transfer member having the intermediate transfer member.
    Type: Application
    Filed: September 14, 2001
    Publication date: May 9, 2002
    Inventors: Minoru Shimojo, Hiroyuki Kobayashi, Akihiko Nakazawa, Akira Shimada, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Patent number: 6383427
    Abstract: A process for producing an electrode for an electric double layer capacitor, which comprises extruding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid by paste extrusion, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: May 7, 2002
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Takamichi Ishikawa, Satoru Kuroki, Manabu Suhara
  • Publication number: 20020041060
    Abstract: A process for the manufacture of an environmental friendly paper from about 56% to about 80% by weight of inorganic mineral powders, about 43% to 18% by weight of polyethylene, and about 1% to 2% by weight of additives is disclosed. A composition for the manufacture of an environmental friendly paper, comprising about 56% to 80% by weight of inorganic mineral powders, about 43% to 18% by weight of polyethylene, and about 1% to 2% weight by additives is also disclosed.
    Type: Application
    Filed: June 25, 2001
    Publication date: April 11, 2002
    Applicant: Lung Meng Environmental Friendly Paper Products Hong Kong (Holdings) Limited
    Inventor: Shih Huei Liang
  • Publication number: 20020041057
    Abstract: An embossed, cast polyolefin film or an embossed, oriented polyolefin film comprises: (a) a core layer comprising a propylene polymer; (b) an embossed outer layer on one side of the core layer, the embossed outer layer comprising an olefin polymer capable of being embossed; and (c) an additional outer layer on a side of the core layer opposite to the embossed outer layer, the additional outer layer comprising an olefin polymer. The embossed film can then be metallized to produce a shiny, metallic film having a prismatic or holographic appearance.
    Type: Application
    Filed: December 5, 2001
    Publication date: April 11, 2002
    Inventors: Robert Andrew Migliorini, Christopher Nothnagle, Salvatore James Pellingra
  • Publication number: 20020037411
    Abstract: A method of making polymeric, e.g., polyester, filaments having low denier spread by use of a polymer of high viscosity is described. The filaments are useful to make yarns and other articles.
    Type: Application
    Filed: July 9, 2001
    Publication date: March 28, 2002
    Inventors: Hans R. Frankfort, Leonard J. Herbig, Gregory E. Sweet, George Vassilatos
  • Publication number: 20020037386
    Abstract: A three-layer microwaveable, plastic wrap having a core layer between a cling layer and a release layer is disclosed, along with a method for making the plastic wrap. The cling layer comprises a base resin and an effective amount of a tackifier to provide sufficient cling to different surfaces such as, for example, glass, plastic, ceramic, stainless steel laminated cardboard, and aluminum. The release layer includes an effective amount of an anti-blocking agent to facilitate dispensing of the wrap from a dispensing roll.
    Type: Application
    Filed: July 31, 2001
    Publication date: March 28, 2002
    Inventor: Douglas D. Bonke