Plasma (e.g., Corona, Glow Discharge, Etc.) Patents (Class 264/469)
-
Publication number: 20150123321Abstract: 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: ApplicationFiled: January 8, 2015Publication date: May 7, 2015Inventors: Shuishou HUANG, Jiayi GUO
-
Publication number: 20140356566Abstract: 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: ApplicationFiled: May 28, 2014Publication date: December 4, 2014Applicant: Achilles USA, Inc.Inventors: Bach Nguyen, Takuo Suzuki
-
Patent number: 8790449Abstract: 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: GrantFiled: March 23, 2010Date of Patent: July 29, 2014Assignee: 3M Innovative Properties CompanyInventors: Fuming B. Li, John M. Sebastian, Marvin E. Jones, Daniel A. Japuntich
-
Publication number: 20140162051Abstract: 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: ApplicationFiled: December 10, 2012Publication date: June 12, 2014Applicant: MITSUBISHI POLYESTER FILM GMBHInventors: Martin JESBERGER, Holger KLIESCH, Bodo KUHMANN, Deborah ALTENHOFEN, Harald RUECKER
-
Publication number: 20140048983Abstract: 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: ApplicationFiled: June 1, 2012Publication date: February 20, 2014Applicant: OERLIKON TEXTILE GmbH & Co. KGInventors: Jens Weinhold, Steffen Husfeldt
-
Patent number: 8613795Abstract: 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: GrantFiled: May 4, 2009Date of Patent: December 24, 2013Assignee: 3M Innovative Properties CompanyInventors: Fuming B. Li, Feng Bai, John M. Sebastian, Marvin E. Jones
-
Patent number: 8580182Abstract: 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: GrantFiled: November 19, 2010Date of Patent: November 12, 2013Assignee: 3M Innovative Properties CompanyInventors: Seyed A. Angadjivand, Andrew R. Fox, John D. Stelter, Timothy J. Lindquist, John M. Brandner, James E. Springett
-
Publication number: 20130253100Abstract: 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: ApplicationFiled: March 23, 2012Publication date: September 26, 2013Inventors: Robert D. Bailey, Benjamin C. Tran, Frank F. Su, Jack Randal Wilkerson
-
Patent number: 8506871Abstract: 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: GrantFiled: April 22, 2010Date of Patent: August 13, 2013Assignee: 3M Innovative Properties CompanyInventors: John M. Brandner, William J. Kopecky, Seyed A. Angadjivand, James E. Springett, Timothy J. Lindquist
-
Patent number: 8187520Abstract: 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: GrantFiled: January 30, 2007Date of Patent: May 29, 2012Assignee: Toray Industries, Inc.Inventors: Nobuyuki Takano, Masashi Ito, Makoto Nishimura
-
Patent number: 8066934Abstract: 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: GrantFiled: May 24, 2007Date of Patent: November 29, 2011Assignees: Sabic Innovative Plastics South America, Universidade Estadual de CampinasInventors: Marco Aurélio de Paoli, Karen Kely Godoi Fermoselli, Márcia Aparecida da Silva Spinacé, Paulo Aparecido dos Santos, João Carlos Girioli
-
Patent number: 8029723Abstract: 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: GrantFiled: July 17, 2007Date of Patent: October 4, 2011Assignee: 3M Innovative Properties CompanyInventors: Seyed A. Angadjivand, Marvin E. Jones, James E. Springett, John M. Brandner, Timothy J. Lindquist
-
Publication number: 20110027511Abstract: 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: ApplicationFiled: March 26, 2009Publication date: February 3, 2011Applicant: GUNZE LIMITEDInventors: Hiroki Kuriu, Hiroyuki Yabuta
-
Patent number: 7824600Abstract: 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: GrantFiled: October 31, 2006Date of Patent: November 2, 2010Assignee: Treofan Germany GmbH & Co. KGInventors: Joachim Jung, Thomas Gottfreund
-
Patent number: 7763231Abstract: 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: GrantFiled: August 6, 2007Date of Patent: July 27, 2010Assignee: Lockheed Martin CorporationInventor: Slade H. Gardner
-
Publication number: 20100151180Abstract: The invention describes a carbon black particulate filled film, useful as a backsheet for a photovoltaic construct.Type: ApplicationFiled: October 9, 2009Publication date: June 17, 2010Inventors: David J. Bravet, Paul W. Ortiz
-
Publication number: 20100098958Abstract: 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: ApplicationFiled: October 21, 2008Publication date: April 22, 2010Inventors: Thomas J. Schwab, Steven A. Schwartz, Maged G. Botros, Charles S. Holland, Robert S. Weber, Richard T.E. Sylvester, Neil W. Morris
-
Publication number: 20100041829Abstract: 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: ApplicationFiled: August 12, 2009Publication date: February 18, 2010Inventor: Dominique VAN MALDEREN
-
Patent number: 7622063Abstract: 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: GrantFiled: July 17, 2006Date of Patent: November 24, 2009Assignee: 3M Innovative Properties CompanyInventors: Douglas C Sundet, Rahul R. Shah, John M. Brandner, Tien T. Wu
-
Publication number: 20090252902Abstract: 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: ApplicationFiled: April 8, 2008Publication date: October 8, 2009Inventors: Eric W. Bender, George F. Cretekos
-
Publication number: 20090148701Abstract: 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: ApplicationFiled: August 25, 2006Publication date: June 11, 2009Inventors: Joachim H. Wendorff, Andreas Greiner, Michael Bognitzki, Martin Graeser
-
Publication number: 20090085259Abstract: 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: ApplicationFiled: December 27, 2005Publication date: April 2, 2009Inventors: Tadashi Nishi, Toshifumi Nagata, Yoshinori Miyaguchi, Naonobu Oda, Katsuhiko Nose
-
Publication number: 20090065979Abstract: 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: ApplicationFiled: December 27, 2005Publication date: March 12, 2009Inventors: Tadashi Nishi, Toshifumi Nagata, Yoshinori Miyaguchi, Naonobu Oda, Katsuhiko Nose
-
Publication number: 20090017290Abstract: 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: ApplicationFiled: July 21, 2005Publication date: January 15, 2009Applicant: Treofan Germany GmbH & Co. KGInventors: Joachim Jung, Peter Schlachter
-
Publication number: 20080050568Abstract: 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: ApplicationFiled: August 24, 2007Publication date: February 28, 2008Inventors: Lucky Lee, Tai Hsun Lee, Ching-Chih Lai, Yan-sheng Yang
-
Patent number: 7217472Abstract: 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: GrantFiled: December 18, 2003Date of Patent: May 15, 2007Assignee: Hamilton Sundstrand CorporationInventor: Andrei Leonida
-
Patent number: 6953544Abstract: 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: GrantFiled: May 7, 2004Date of Patent: October 11, 2005Assignee: 3M Innovative Properties CompanyInventors: Marvin E. Jones, Christopher S. Lyons, David B. Redmond, Jeffrey L. Solomon, Seyed Abolhassan Angadjivand
-
Patent number: 6858275Abstract: 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: GrantFiled: April 17, 2003Date of Patent: February 22, 2005Assignee: Cryovac, Inc.Inventors: Isabella Ferri, Slawomir Opuszko, Nathanael Rustia Miranda
-
Patent number: 6790405Abstract: 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: GrantFiled: December 5, 2001Date of Patent: September 14, 2004Assignee: ExxonMobil Oil CorporationInventors: Robert Andrew Migliorini, Christopher Nothnagle, Salvatore James Pellingra, Jr.
-
Patent number: 6774155Abstract: 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: GrantFiled: July 16, 2002Date of Patent: August 10, 2004Assignee: Atrium Medical CorporationInventors: Paul Martakos, Thomas M. Swanick, Theodore Karwoski
-
Patent number: 6761965Abstract: 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: GrantFiled: March 25, 2002Date of Patent: July 13, 2004Assignee: Cryovac, Inc.Inventors: Isabella Ferri, Slawomir Opuszko, Nathanael Rustia Miranda
-
Patent number: 6660210Abstract: An electret is described that includes a plasma surface modified polymeric article having plasma surface fluorination produced by fluorinating the polymeric article.Type: GrantFiled: March 18, 2003Date of Patent: December 9, 2003Assignee: 3M Innovative Properties CompanyInventors: Marvin E. Jones, Christopher S. Lyons, David B. Redmond, Jeffrey L. Solomon, Seyed Abolhassan Angadjivand
-
Publication number: 20030209839Abstract: 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: ApplicationFiled: April 28, 2003Publication date: November 13, 2003Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
-
Patent number: 6638470Abstract: 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: GrantFiled: January 31, 2001Date of Patent: October 28, 2003Assignee: E. I. du Pont de Nemours and CompanyInventor: Thomas A. J. Schweiger
-
Publication number: 20030198820Abstract: 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: ApplicationFiled: April 28, 2003Publication date: October 23, 2003Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
-
Publication number: 20030196899Abstract: 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: ApplicationFiled: April 28, 2003Publication date: October 23, 2003Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
-
Patent number: 6632384Abstract: 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: GrantFiled: March 19, 2001Date of Patent: October 14, 2003Assignee: Sumitomo Chemical Company, LimitedInventor: Satoru Sogabe
-
Patent number: 6602457Abstract: 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: GrantFiled: September 7, 2000Date of Patent: August 5, 2003Assignee: Clean Air Technology Co.Inventors: Choong-Joong Lee, Soon-Kyu Chung, Jin-Soo Joo
-
Patent number: 6573311Abstract: 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: GrantFiled: September 22, 1999Date of Patent: June 3, 2003Assignee: Atrium Medical CorporationInventors: Paul Martakos, Thomas M. Swanick, Theodore Karwoski
-
Publication number: 20030089450Abstract: 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: ApplicationFiled: November 6, 2001Publication date: May 15, 2003Inventor: Allen Fong-Chin Lin
-
Publication number: 20030064195Abstract: 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: ApplicationFiled: July 26, 2002Publication date: April 3, 2003Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Herbert Peiffer, Hans Mahl
-
Publication number: 20030059593Abstract: 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: ApplicationFiled: July 11, 2002Publication date: March 27, 2003Inventors: Takatoshi Sakaguchi, Junichi Kimura, Teruaki Yoshida
-
Patent number: 6503439Abstract: 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: GrantFiled: June 15, 2000Date of Patent: January 7, 2003Inventor: Albert H. Burstein
-
Patent number: 6419871Abstract: 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: GrantFiled: May 25, 2000Date of Patent: July 16, 2002Assignee: Transweb, LLC.Inventor: Kumar Ogale
-
Patent number: 6379605Abstract: 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: GrantFiled: October 22, 1999Date of Patent: April 30, 2002Assignee: Nan Ya Plastics CorporationInventor: Allen Fong-Chin Lin
-
Publication number: 20020041057Abstract: 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: ApplicationFiled: December 5, 2001Publication date: April 11, 2002Inventors: Robert Andrew Migliorini, Christopher Nothnagle, Salvatore James Pellingra
-
Patent number: 6368543Abstract: 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: GrantFiled: September 13, 1999Date of Patent: April 9, 2002Assignee: Nan Ya Plastics CorporationInventor: Allen Fong-Chin Lin
-
Patent number: 6364988Abstract: 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: GrantFiled: September 13, 1999Date of Patent: April 2, 2002Assignee: Nan Ya Plastics CorporationInventor: Allen Fong-Chin Lin
-
Publication number: 20020000686Abstract: 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: ApplicationFiled: January 31, 2001Publication date: January 3, 2002Inventor: Thomas A. Schweiger
-
Publication number: 20010040316Abstract: 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: ApplicationFiled: July 11, 2001Publication date: November 15, 2001Inventor: David M.H. Stewart