Plasma (e.g., Corona, Glow Discharge, Etc.) Patents (Class 264/469)
  • Publication number: 20150123321
    Abstract: A multifunctional BOPP cigarette packaging film comprises an upper layer (1), a middle-upper layer (2), a middle layer (3), a middle-lower layer (4) and a lower layer (5). The upper layer (1) is a binary copolymerized polypropylene surface layer, both the middle-upper layer (2) and the middle-lower layer (4) are homopolymerized polypropylene antibacterial agent layers, the middle layer (3) is a homopolymerized polypropylene stiffening agent layer, the lower layer (5) is a binary copolymerized polypropylene bottom surface layer. Also disclosed is a manufacturing method for the multifunctional BOPP cigarette packaging film. The packaging film acts as an effective barrier, has slip property and relatively low moisture permeability as well as low cost, and is suitable for a high-speed packing machine.
    Type: Application
    Filed: January 8, 2015
    Publication date: May 7, 2015
    Inventors: Shuishou HUANG, Jiayi GUO
  • Publication number: 20140356566
    Abstract: Polyolefin films comprising a gloss layer, a matte layer and a support layer are provided. Use of the polyolefin films as a carrier material for self-clinging films and polyolefin films adhered to self-clinging films are also provided.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 4, 2014
    Applicant: Achilles USA, Inc.
    Inventors: Bach Nguyen, Takuo Suzuki
  • Patent number: 8790449
    Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include a heterocyclic imide material which is free of fluorinated groups. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 29, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Fuming B. Li, John M. Sebastian, Marvin E. Jones, Daniel A. Japuntich
  • Publication number: 20140162051
    Abstract: The invention relates to a white, biaxially oriented polyester film which has at least one polyester-containing base layer (B) and at least one white, matt outer layer (A), where the outer later (A) and the base layer (B) include, alongside the white pigment, other particles, preferably SiO2, which have a median diameter of from 2 to 10 ?m. The film is optionally functionalized on at least one surface. Films of this type feature in particular low weathering-resistant gloss of the outer layer (A), high whiteness, high UV protection, and high processing safety, and are therefore suitable for outdoor uses, in particular for use in roofing films.
    Type: Application
    Filed: December 10, 2012
    Publication date: June 12, 2014
    Applicant: MITSUBISHI POLYESTER FILM GMBH
    Inventors: Martin JESBERGER, Holger KLIESCH, Bodo KUHMANN, Deborah ALTENHOFEN, Harald RUECKER
  • Publication number: 20140048983
    Abstract: The invention relates to a method and to a device for producing synthetic grass fibers for artificial turf. For said purpose, a plurality of strips formed from a divided film or a plurality of individually extruded monofilaments made of a polymer material are produced in an extrusion process. The strips or monofilaments are then stretched and wound individually or as a fiber bundle to form coils. According to the invention, in order to in particular influence the physical properties of the synthetic grass fibers in addition to the visual properties, the roughness of the surfaces of the strips or monofilaments is changed before or after the winding. For said purpose, the device according to the invention has a treatment apparatus, the means of which are suitable for changing the surface roughness of the strips or monofilaments.
    Type: Application
    Filed: June 1, 2012
    Publication date: February 20, 2014
    Applicant: OERLIKON TEXTILE GmbH & Co. KG
    Inventors: Jens Weinhold, Steffen Husfeldt
  • Patent number: 8613795
    Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include N-substituted amino carbocyclic aromatic materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: December 24, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Fuming B. Li, Feng Bai, John M. Sebastian, Marvin E. Jones
  • Patent number: 8580182
    Abstract: A molded respirator is made from a monocomponent monolayer nonwoven web containing a bimodal mass fraction/fiber size mixture of intermingled continuous monocomponent polymeric microfibers and larger size fibers of the same polymeric composition. The respirator is a cup-shaped porous monocomponent monolayer matrix whose matrix fibers are bonded to one another at least some points of fiber intersection. The matrix has a King Stiffness greater than 1 N. The respirator may be formed without requiring stiffening layers, bicomponent fibers, or other reinforcement in the filter media layer.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: November 12, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Seyed A. Angadjivand, Andrew R. Fox, John D. Stelter, Timothy J. Lindquist, John M. Brandner, James E. Springett
  • Publication number: 20130253100
    Abstract: Embodiments of the invention blend polyethylene (PE), polypropylene (PP), and polystyrene (PS) with calcium carbonate (CC) or other filler(s) to form a single or multi-layer plastic film. The result is an improved plastic film that retains the beneficial properties of conventional plastic films, but can also be easily fractured and creased. Embodiments of the invention also provide a method for manufacturing the single or multi-layer plastic film.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 26, 2013
    Inventors: Robert D. Bailey, Benjamin C. Tran, Frank F. Su, Jack Randal Wilkerson
  • Patent number: 8506871
    Abstract: A porous monocomponent nonwoven web contains a bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition. There are at least five times as many microfibers as larger size fibers, and a histogram of the mass fraction of fibers vs. fiber size exhibits a larger size fiber mode greater than 10 ?m. The web may be made by flowing fiber-forming material through a die cavity having larger size orifices and at least five times as many smaller size orifices to form filaments, attenuating the filaments into fibers and collecting the attenuated fibers to form the nonwoven web. The web is especially well suited to the manufacture of self-supporting three dimensional articles such as molded cup-shaped respirators and pleated air filters.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: August 13, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: John M. Brandner, William J. Kopecky, Seyed A. Angadjivand, James E. Springett, Timothy J. Lindquist
  • Patent number: 8187520
    Abstract: The present invention provides a nonwoven fabric for filters which is excellent in dust collection efficiency and exhibits low pressure drop and excellent mechanical characteristics and rigidity, and a method of producing the nonwoven fabric. A nonwoven fabric for filters of the present invention is a nonwoven fabric for filters which is a long fiber nonwoven fabric, consisting of thermoplastic continuous filaments and formed by partially thermocompression bonding the thermoplastic continuous filaments, wherein the nonwoven fabric has a QF value (Pa?1) of 0.02 to 0.08 and stiffness of 2 to 80 mN.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: May 29, 2012
    Assignee: Toray Industries, Inc.
    Inventors: Nobuyuki Takano, Masashi Ito, Makoto Nishimura
  • Patent number: 8066934
    Abstract: The present invention relates to a process of production of polyamide compounds with natural fibers and polyamide compounds with natural fibers, establishes the fact of using natural fiber to obtain a compound with mechanical properties close to the one obtained with inorganic loads by means of continuous process with extrusion and molding by injection process; the processes presented allows the obtainment, by means of injection, of finished products with precise dimensional and complex features; the fact that the compound with natural Curauá fiber presenting suitable mechanical properties combined to a lesser density than the compound with inorganic load is interesting to the automotive industry as vehicles manufactured with lighter parts consume less fuel.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: November 29, 2011
    Assignees: Sabic Innovative Plastics South America, Universidade Estadual de Campinas
    Inventors: Marco Aurélio de Paoli, Karen Kely Godoi Fermoselli, Márcia Aparecida da Silva Spinacé, Paulo Aparecido dos Santos, João Carlos Girioli
  • Patent number: 8029723
    Abstract: Shaped filtration articles are made from a monocomponent nonwoven web formed by flowing first and second fiber-forming materials of the same polymeric composition through first and second die cavities in respective fluid communication with first and second sets of orifices in a meltblowing die tip. The first fiber-forming material flows at a lesser flow rate or viscosity through the first die cavity and first set of orifices to form a set of smaller size filaments and the second fiber-forming material flows at a greater flow rate or viscosity through the second die cavity and second set of orifices to form a set of larger size filaments. The collected nonwoven web contains a meltblown bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: October 4, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Seyed A. Angadjivand, Marvin E. Jones, James E. Springett, John M. Brandner, Timothy J. Lindquist
  • Publication number: 20110027511
    Abstract: An object of the present invention is to provide a multilayered polyamide-based tube for food packaging that is free from blocking in a Layer (C), and that has an excellent adherence to processed meat or like packaged food. The present invention provides a multilayered polyamide-based tube for food packaging comprising a Layer (A), a Layer (B) and a Layer (C); the multilayered polyamide-based tube having a low-temperature shrinkage ratio of 2 to 10%, and exhibiting heat shrinkage properties and gas barrier properties; the Layer (A) containing a polyamide-based resin; the Layer (B) containing a polyolefin-based resin; and the Layer (C) that comes in contact with the packaged food, the Layer (C) being a Layer (C-1) that contains a polypropylene-based resin having a heat distortion temperature (ISO 75B-1 or ISO 75B-2) of not less than 60° C. and a Vicat softening point of not less than 120° C.
    Type: Application
    Filed: March 26, 2009
    Publication date: February 3, 2011
    Applicant: GUNZE LIMITED
    Inventors: Hiroki Kuriu, Hiroyuki Yabuta
  • Patent number: 7824600
    Abstract: The invention relates to a method for raising the surface tension of biaxially-stretched films made of thermoplastic polymers. According to the method, a film is first treated on a surface by means of an atmospheric pressure plasma before being stretched transversally or simultaneously across the width thereof, and the film is additional a subjected to a second treatment by means of a corona or flame after being stretched transversally or simultaneously, the second treatment being done on the same surface which has already been plasma-treated.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: November 2, 2010
    Assignee: Treofan Germany GmbH & Co. KG
    Inventors: Joachim Jung, Thomas Gottfreund
  • Patent number: 7763231
    Abstract: A process for producing carbon nanotubes includes carbon plasma generation with microwave energy, plasma stabilization, and product deposition. Stabilization homogenizes the plasma energy density and concentration, leading to a more efficient reactor. A transition metal catalyst and associated catalyst support are used to form the end product. The formation region may have variations of geometry and supporting equipment that will affect the rate and purity of production. The formation region is immediately downstream from the plasma stabilization region such that the apparatus may be mounted on a robotic arm for direct deposition of product.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: July 27, 2010
    Assignee: Lockheed Martin Corporation
    Inventor: Slade H. Gardner
  • Publication number: 20100151180
    Abstract: The invention describes a carbon black particulate filled film, useful as a backsheet for a photovoltaic construct.
    Type: Application
    Filed: October 9, 2009
    Publication date: June 17, 2010
    Inventors: David J. Bravet, Paul W. Ortiz
  • Publication number: 20100098958
    Abstract: A laminate and a process for making it are disclosed. The laminate comprises a metal substrate and a polymer layer that adheres to at least one plasma-treated surface of the metal substrate. The polymer layer comprises a blend of a first polyolefin and a grafted polyolefin. The laminate can be prepared by plasma-treating at least one surface of a metal substrate and extruding onto the plasma-treated surface a polymer layer comprising a blend of a first polyolefin and a grafted polyolefin.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 22, 2010
    Inventors: Thomas J. Schwab, Steven A. Schwartz, Maged G. Botros, Charles S. Holland, Robert S. Weber, Richard T.E. Sylvester, Neil W. Morris
  • Publication number: 20100041829
    Abstract: Polymer string mainly but not exclusively consisting of one or several plastics, characterised in that at least one plastic consists of a thermoplastic material in which at least one alkylbenzyl ester of a 1,2 dicarboxylic acid or one of its derivates is distributed homogeneously, that the alkyl chain of the alkyl-benzyl ester or one of its derivates consists of at least five carbon atoms, and that it is used in a concentration between 0.1 to 5 percent by weight, better between 0.3 to 4 percent by weight, and even better between 0.3 to 1.2 percent by weight.
    Type: Application
    Filed: August 12, 2009
    Publication date: February 18, 2010
    Inventor: Dominique VAN MALDEREN
  • Patent number: 7622063
    Abstract: A filter element in the form of a nonwoven self-supporting filtration web having rows of folded or corrugated spaced-apart pleats, the web containing continuous thermoplastic fibers a majority of which are aligned at 90°±20° with respect to the row direction. The filter element can be made by forming rows of pleats in such a nonwoven web and cutting the web to a desired size and shape. The filter elements can provide improved mechanical and filtration properties and can exhibit reduced susceptibility to pleat deformation and the loss of space between pleats.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: November 24, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Douglas C Sundet, Rahul R. Shah, John M. Brandner, Tien T. Wu
  • Publication number: 20090252902
    Abstract: A heat sealable, multi-layer film structure for multi-color printing or lamination processes and method for making the same are provided. The multi-layer film structure may include a core layer comprising a thermoplastic polymer and essentially no migratory slip agents; a functional layer on a first side of the core layer, wherein the functional layer is a printable layer or a laminatable layer; and a heat sealable skin layer on a second side of the core layer, the heat sealable skin layer comprising a thermoplastic polymer and a slip system. The multi-layer film structure is prepared without any migratory slip additives. Without migratory slip additives, the multi-layer film structure exhibits excellent machinability on typical packaging equipment.
    Type: Application
    Filed: April 8, 2008
    Publication date: October 8, 2009
    Inventors: Eric W. Bender, George F. Cretekos
  • Publication number: 20090148701
    Abstract: The invention relates to a method for producing metal oxide fibers with diameters on the micro- and nanometric scale by using electrospinning. At least one polymer is dissolved in a solvent, a metal salt is dissolved in this polymer solution, and this mixture is subsequently electrospun into fibers. Breaking down the polymer renders metal oxide fibers accessible that can be optionally reduced into the corresponding metal fibers.
    Type: Application
    Filed: August 25, 2006
    Publication date: June 11, 2009
    Inventors: Joachim H. Wendorff, Andreas Greiner, Michael Bognitzki, Martin Graeser
  • Publication number: 20090085259
    Abstract: A production process of a film roll according to the present invention includes a step of melt-extruding and cooling wherein polyamide based resin is melt-extruded and cooled in a sheet form onto a movable cooling material surface to obtain an unstretched sheet; a step of biaxial stretching wherein an unstretched sheet is stretched biaxially in the longitudinal direction and the transverse direction; and a winding-up step of taking up the biaxially stretched film in a roll form. And in the step of melt-extruding and cooling, corona discharge in a streamer corona state is performed between an electrode applied with high dc voltage and the polyamide based resin sheet in the melted state, and sufficient electric charges that enable the polyamide based resin sheet in the melted state to come in close contact with the movable cooling material surface are imparted.
    Type: Application
    Filed: December 27, 2005
    Publication date: April 2, 2009
    Inventors: Tadashi Nishi, Toshifumi Nagata, Yoshinori Miyaguchi, Naonobu Oda, Katsuhiko Nose
  • Publication number: 20090065979
    Abstract: The present invention provides a process for production of a polyamide based resin film roll comprising a step of melt-extruding and cooling wherein polyamide based resin is melt-extruded and cooled in a sheet form onto a mobile cooling material surface to obtain an unstretched sheet; a step of biaxial stretching wherein an unstretched sheet is stretched biaxially in the longitudinal direction and the transverse direction; and a step of winding up the biaxially stretched film that is biaxially stretched in a form of roll. Then, in the step of melt-extruding and cooling polyamide based resin onto a mobile cooling material surface, corona discharge in a streamer corona state is performed between an electrode applied with high DC voltage and the polyamide based resin sheet in the melted state, and sufficient electric charges that enable the polyamide based resin sheet in the melted state to come in close contact with the mobile cooling material surface are imparted.
    Type: Application
    Filed: December 27, 2005
    Publication date: March 12, 2009
    Inventors: Tadashi Nishi, Toshifumi Nagata, Yoshinori Miyaguchi, Naonobu Oda, Katsuhiko Nose
  • Publication number: 20090017290
    Abstract: The invention relates to a metallized, biaxially oriented, transparent polypropylene multi-layer film which contains at least two layers, wherein the layers comprise a base layer and at least one first metallized cover layer on a surface of the base layer wherein the layer contains at least 80% by weight of a propylene-ethylene copolymer which has an ethylene content of 1.2 to <2.8% by weight and a propylene content of 97.2-98.8% by weight and a melting point in the region of 140 to 160° C. and a fusion enthalpy of 80 to 110 J/g and the first cover layer has a thickness of at least 2.5 ?m and the film is metallized on the surface of the first cover layer.
    Type: Application
    Filed: July 21, 2005
    Publication date: January 15, 2009
    Applicant: Treofan Germany GmbH & Co. KG
    Inventors: Joachim Jung, Peter Schlachter
  • Publication number: 20080050568
    Abstract: The invention provides a tape film backing including a mixing layer comprising 40-60 parts by weight of PE and 60-40 parts by weight of EPDM rubber and a PE layer. The invention also provides a tape with an adhesive layer coated on the mixing layer or the PE layer of the tape film backing. The tape and the film backing is a halogen-free eco-material possessing superior physical properties as well as fine electrical insulating properties.
    Type: Application
    Filed: August 24, 2007
    Publication date: February 28, 2008
    Inventors: Lucky Lee, Tai Hsun Lee, Ching-Chih Lai, Yan-sheng Yang
  • Patent number: 7217472
    Abstract: A support member is useful for supporting membranes such as solid polymer electrolyte ion exchange membranes such as those used in electrochemical cell applications. The support member has a first lattice pattern on a first side of a single piece of material. A second lattice pattern on a second side of the single piece of material cooperates with the first lattice pattern to establish a plurality of flow passages across the material. Each lattice pattern has a corresponding plurality of recesses that extend partway through the material and overlapping portions of the recesses define the flow passages. In a disclosed example, the monolithic support member lattice patterns are established using chemical etching.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: May 15, 2007
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Andrei Leonida
  • Patent number: 6953544
    Abstract: A method of making a respirator, which method includes placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer. The electret is disposed in the respirator body such that air passes through it before being inhaled by a respirator wearer. The electret includes a nonwoven web that has fluorinated polymeric microfibers and that has at least about 25% atomic fluorine as detected by ESCA and a CF3:CF2 ratio of at least about 0.45.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: October 11, 2005
    Assignee: 3M Innovative Properties Company
    Inventors: Marvin E. Jones, Christopher S. Lyons, David B. Redmond, Jeffrey L. Solomon, Seyed Abolhassan Angadjivand
  • Patent number: 6858275
    Abstract: An irradiated multilayer film has a first layer and a second layer. The first layer is an outer heat seal layer containing a blend of a highly branched homogeneous polymer and a semicrystalline polymer. The highly branched homogeneous polymer has at least 40 branches per 1000 methylene groups, an Mw/Mn less than 3.0, and a density of less than 0.89 g/cc. The highly branched homogeneous polymer is present in an amount of from about 1 to 50 weight percent, based on layer weight. The semicrystalline polyolefin has a density of at least 0.90 g/cc. The semicrystalline polyolefin is present in an amount of from about 60 to 99 weight percent, based on total layer weight. The second layer contains a thermoplastic polymer in a crosslinked polymer network. A process for making a packaging article includes coextruding the first and second layers, irradiating the resulting multilayer film, and thereafter heat sealing the first layer to itself or another component of the packaging article.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: February 22, 2005
    Assignee: Cryovac, Inc.
    Inventors: Isabella Ferri, Slawomir Opuszko, Nathanael Rustia Miranda
  • 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: 6774155
    Abstract: The invention is directed to methods for fabricating devices from polymer precursors, along with devices so fabricated. The methods of the invention include the steps of plasma treating a polymer based resin, paste, preform billet, or extrudate, and employing the treated polymer in the fabricated device. According to one embodiment, the fabricated device can include implantable prosthetics such as heart valves, sutures, vascular access devices, vascular grafts, shunts, catheters, single layered membranes, double layered membranes, and the like. Devices fabricated according to one embodiment of the invention include regions having selected porosity, permeability and/or chemistry characteristics.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: August 10, 2004
    Assignee: Atrium Medical Corporation
    Inventors: Paul Martakos, Thomas M. Swanick, Theodore Karwoski
  • Patent number: 6761965
    Abstract: An irradiated multilayer film has a first layer and a second layer. The first layer is an outer heat seal layer containing a blend of a highly branched homogeneous polymer and a semicrystalline polymer. The highly branched homogeneous polymer has at least 40 branches per 1000 methylene groups, an Mw/Mn less than 3.0, and a density of less than 0.89 g/cc. The highly branched homogeneous polymer is present in an amount of from about 5 to 50 weight percent, based on layer weight. The semicrystalline polyolefin has a density of at least 0.90 g/cc. The semicrystalline polyolefin is present in an amount of from about 50 to 95 weight percent, based on total layer weight. The second layer contains a thermoplastic polymer in a crosslinked polymer network. A process for making a packaging article includes coextruding the first and second layers, irradiating the resulting multilayer film, and thereafter heat sealing the first layer to itself or another component of the packaging article.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: July 13, 2004
    Assignee: Cryovac, Inc.
    Inventors: Isabella Ferri, Slawomir Opuszko, Nathanael Rustia Miranda
  • Patent number: 6660210
    Abstract: An electret is described that includes a plasma surface modified polymeric article having plasma surface fluorination produced by fluorinating the polymeric article.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: December 9, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Marvin E. Jones, Christopher S. Lyons, David B. Redmond, Jeffrey L. Solomon, Seyed Abolhassan Angadjivand
  • Publication number: 20030209839
    Abstract: The present invention relates to high dielectric non-woven fabrics and their synthetic process. Particularly, the present invention relates to a process for preparing high dielectric non-woven fabrics comprising the steps of (a) mix-spinning polyvinylidene fluoride (PVDF) and polypropylene (PP) to prepare a fiber, (b) polarizing the fiber prepared in the step (a) to improve the dielectric constant of the fiber, and (c) manufacturing non-woven fabrics from the fiber having improved dielectric constant, prepared in the step (b), and non-woven fabrics prepared according to the mentioned process.
    Type: Application
    Filed: April 28, 2003
    Publication date: November 13, 2003
    Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
  • Patent number: 6638470
    Abstract: A process for flash-spinning a web of plexifilamentary film-fibril strands of synthetic fiber-forming polymer and laying down the web to form a nonwoven batt material therefrom is provided. The process includes the the step of generating a spin fluid consisting essentially of synthetic fiber-forming polymer and a spin agent, wherein the spin agent is comprised of at least 80% by weight, based on the total weight of the spin agent, of hydrocarbons comprised substantially exclusively of carbon and hydrogen atoms. The hydrocarbons are comprised of at least 25% by weight of unsaturated hydrocarbons having 4-8 carbon atoms.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: October 28, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Thomas A. J. Schweiger
  • Publication number: 20030196899
    Abstract: The present invention relates to high dielectric non-woven fabrics and their synthetic process. Particularly, the present invention relates to a process for preparing high dielectric non-woven fabrics comprising the steps of (a) mix-spinning polyvinylidene fluoride (PVDF) and polypropylene (PP) to prepare a fiber, (b) polarizing the fiber prepared in the step (a) to improve the dielectric constant of the fiber, and (c) manufacturing non-woven fabrics from the fiber having improved dielectric constant, prepared in the step (b), and non-woven fabrics prepared according to the mentioned process.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 23, 2003
    Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
  • Publication number: 20030198820
    Abstract: The present invention relates to high dielectric non-woven fabrics and their synthetic process. Particularly, the present invention relates to a process for preparing high dielectric non-woven fabrics comprising the steps of (a) mix-spinning polyvinylidene fluoride (PVDF) and polypropylene (PP) to prepare a fiber, (b) polarizing the fiber prepared in the step (a) to improve the dielectric constant of the fiber, and (c) manufacturing non-woven fabrics from the fiber having improved dielectric constant, prepared in the step (b), and non-woven fabrics prepared according to the mentioned process.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 23, 2003
    Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
  • Patent number: 6632384
    Abstract: There is provided a process for producing a resin molded article, which includes the steps of: (1) molding a thermoplastic resin to obtain a resin molded articles; and (2) flame-treating the surface of the resin molded article to obtain a flame-treated resin molded article; wherein the process does not comprise after the step (2) any further step of printing, adhesive-coating or painting the flame-treated surface of the flame-treated resin molded article obtained in the step (2).
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: October 14, 2003
    Assignee: Sumitomo Chemical Company, Limited
    Inventor: Satoru Sogabe
  • Patent number: 6602457
    Abstract: The present invention relates to high dielectric non-woven fabrics and their synthetic process and more particularly, relates to a process for preparing high dielectric non-woven fabrics including the steps of (a) mix-spinning polyvinylidene fluoride (PVDF) and polypropylene (PP) to prepare a fiber, (b) polarizing the fiber prepared in the step (a) to improve the dielectric constant of the fiber, and (c) manufacturing non-woven fabrics from the fiber having improved dielectric constant, prepared in the step (b), and non-woven fabrics prepared according to the mentioned process.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: August 5, 2003
    Assignee: Clean Air Technology Co.
    Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
  • Patent number: 6573311
    Abstract: The invention is directed to methods for fabricating devices from polymer precursors, along with devices so fabricated. The methods of the invention include the steps of plasma treating a polymer based resin, paste, preform billet, or extrudate, and employing the treated polymer in the fabricated device. According to one embodiment, the fabricated device can include implantable prosthetics such as heart valves, sutures, vascular access devices, vascular grafts, shunts, catheters, single layered membranes, double layered membranes, and the like. Devices fabricated according to one embodiment of the invention include regions having selected porosity, permeability and/or chemistry characteristics.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: June 3, 2003
    Assignee: Atrium Medical Corporation
    Inventors: Paul Martakos, Thomas M. Swanick, Theodore Karwoski
  • Publication number: 20030089450
    Abstract: Recently, in terms of improving the yield and production rate of a biaxial-oriented polypropylene pearly synthetic paper, since the inorganic powder itself has an unsteady dispersion property while blended with polypropylene and while the extruder raises its production rate, which causes a shorter period of replacing the filter screen of the extruder; consequently, frequently replacing the filter screen deteriorates the efficiency of production, further obstructs the goal of increasing the yield from being achieved.
    Type: Application
    Filed: November 6, 2001
    Publication date: May 15, 2003
    Inventor: Allen Fong-Chin Lin
  • Publication number: 20030064195
    Abstract: The invention concerns a unilaterally mat, sealable, UV-stabilized and flame-resistant, sealable, co-extruded, biaxially oriented polyester film comprising at least one base layer (B) and a sealable top coating (A) applied to both sides of said base layer, in addition to a mat covering (C). The film also contains at least one UV stabilizer as a light stabilizer. The invention further concerns a method for the production of said film and the use thereof.
    Type: Application
    Filed: July 26, 2002
    Publication date: April 3, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Herbert Peiffer, Hans Mahl
  • Publication number: 20030059593
    Abstract: A composite film is provided by providing a polypropylene or other base resin layer, laminating a first covering layer of a resin composition (1) comprising the following components (A), (B), (C) and (D) to one side of the base resin layer and a second covering layer of a resin composition (2) comprising the components (A) and (D) to the other side of the base resin layer, which composite film is optionally stretched. The resin composition (2) may contain component (C).
    Type: Application
    Filed: July 11, 2002
    Publication date: March 27, 2003
    Inventors: Takatoshi Sakaguchi, Junichi Kimura, Teruaki Yoshida
  • Patent number: 6503439
    Abstract: Disclosed is a method of producing a shaped article suitable for use as the load bearing component of a prosthetic device formed from ultrahigh molecular weight polyethylene. polyethylene.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: January 7, 2003
    Inventor: Albert H. Burstein
  • Patent number: 6419871
    Abstract: The present invention is drawn to an improved electrostatic filter medium comprising a web of electret fibers which have been treated with fluorine-containing plasmas at a deposition amount of about 0.03 g/m2 to about 1.5 g/m2; electrostatically charged; rinsed; and dried. The present invention is further drawn to a method of producing non-woven webs which have been treated with a fluorine-containing plasma at a deposition amount of about 0.03 g/m2 to about 1.5 g/m2; electrostatically charged; rinsed; and dried.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: July 16, 2002
    Assignee: Transweb, LLC.
    Inventor: Kumar Ogale
  • Patent number: 6379605
    Abstract: Disclosed is a process for producing a three layers co-extrusion biaxially oriented polypropylene (hereinafter as BOPP) synthetic paper and transparent film for in-mold label. More particularly, the invention relates to a process for producing a three layers biaxially oriented PP synthetic paper by means of three layers co-extrusion wherein three different PP resin compositions are separately extruded by one primary and two secondary extruders first, and then are co-flowed by a same T-die to form a three layers coating sheet.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: April 30, 2002
    Assignee: Nan Ya Plastics Corporation
    Inventor: Allen Fong-Chin Lin
  • 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
  • Patent number: 6368543
    Abstract: Disclosed is an improvement of a process for producing a three layers co-extrusion biaxially polypropylene(BOPP) synthetic paper of thickness 25˜250 &mgr;m which is menufactured by using three single screw extruders By means of an improvement of a process for producing a three layers co-extrusion biaxially polypropylene(hereinafter as BOPP) synthetic paper of thickness 25˜250 &mgr;m. More particularly, the invention relates to a process for producing a three layers BOPP synthetic paper by means of three layers co-extrusion wherein two different PP resin compositions are separately extruded by one primary single screw extruder with venting device and two secondary single screw extruders with venting device first, and then are co-flowed by a same T-die to form a three layers coating sheet, and through cooling, biaxial orientation, corona treatment and winding to form a three layers co-extrusion synthetic paper of thickness 25˜250 &mgr;m.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 9, 2002
    Assignee: Nan Ya Plastics Corporation
    Inventor: Allen Fong-Chin Lin
  • Patent number: 6364988
    Abstract: Disclosed is a process for producing a 3-layer co-extruded biaxially polypropylene (hereinafter as BOPP) synthetic paper of thickness 25-250 &mgr;m. More particularly, the invention relates to a process for producing a 3-layer biaxially-oriented PP synthetic paper by means of 3-layer co-extrusion wherein two different PP resin compositions are separately extruded by one primary and two secondary extruders first, and then are co-flowed by a same T-die to form a three layers coating sheet, and through cooling, biaxial orientation, corona treatment and winding to form a 3-layer co-extrusion synthetic paper of thickness 25-250 &mgr;m.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 2, 2002
    Assignee: Nan Ya Plastics Corporation
    Inventor: Allen Fong-Chin Lin
  • Publication number: 20020000686
    Abstract: A process for flash-spinning a web of plexifilamentary film-fibril strands of synthetic fiber-forming polymer and laying down the web to form a nonwoven batt material therefrom is provided. The process includes the the step of generating a spin fluid consisting essentially of synthetic fiber-forming polymer and a spin agent, wherein the spin agent is comprised of at least 80% by weight, based on the total weight of the spin agent, of hydrocarbons comprised substantially exclusively of carbon and hydrogen atoms. The hydrocarbons are comprised of at least 25% by weight of unsaturated hydrocarbons having 4-8 carbon atoms.
    Type: Application
    Filed: January 31, 2001
    Publication date: January 3, 2002
    Inventor: Thomas A. Schweiger
  • Publication number: 20010040316
    Abstract: The present invention is a method of making a polyurethane composite. The method includes forming a non-polar material into a predetermined shape and preparing its bonding through plasma treatment. Once the bonding surface has been prepared, the non-polar material is positioned in a mold and liquid precursors of polyurethane are poured into a cavity of the mold such that the liquid precursor of polyurethane is in contact with the bonding surface of the non-polar material. The liquid precursor of polyurethane is then cured to form a polyurethane material that is effectively joined to the bonding surface of the non-polar material to form the polyurethane composite material.
    Type: Application
    Filed: July 11, 2001
    Publication date: November 15, 2001
    Inventor: David M.H. Stewart