Of Filament Patents (Class 264/210.8)
  • Patent number: 10513803
    Abstract: The present disclosure relates to a polyethylene fiber and a method for preparing thereof, and more particularly to a polyethylene fiber, a method for preparing thereof, and an apparatus for preparing thereof, which has excellent wearing and touch sensation with processing convenience into woven fabrics and knitted fabrics in use in applied products by reducing the stiffness of fiber having the same physical properties using an enforced necking method in a spinning process.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: December 24, 2019
    Assignee: HUVIS CORPORATION, LTD.
    Inventors: Seong-Hoon Kim, Jong-Hoon Park, Dong-Hwan Cha
  • Patent number: 10500076
    Abstract: Bioabsorbable scaffolds having high crush recoverability, high fracture resistance, and reduced or no recoil due to self expanding properties at physiological conditions are disclosed. The scaffolds are made from a random copolymer of PLLA and a rubbery polymer such as polycaprolactone.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: December 10, 2019
    Assignee: ABBOTT CARDIOVASCULAR SYSTEMS INC.
    Inventors: John J. Stankus, Hugh Zhao, Mikael Trollsas, Syed Faiyaz Ahmed Hossainy, Michael H. Ngo, Yunbing Wang, Benjamyn Serna
  • Patent number: 10414917
    Abstract: In a practicable continuous or batchwise process for the preparation of a crystallizable polylactic acid mixture, lactic acid may be polycondensed to yield an oligomer, which may then be depolymerized to yield a crude lactide. The crude lactide may be purified to yield a pure lactide, wherein fractionation may be carried out in the purification into an L- or D-lactide-rich fraction and also a meso-lactide-rich fraction. Subsequently a separate ring-opening polymerization of the resulting lactide fractions can be carried out. The individual polylactic acid batches or streams generated by the ring-opening polymerization may then be mixed. The present disclosure further relates to apparatuses for carrying out such processes and polylactic acid mixtures.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: September 17, 2019
    Assignees: UHDE INVENTA-FISCHER GMBH, THYSSENKRUPP AG
    Inventors: Rainer Hagen, Udo Mühlbauer, Caspar Paetz
  • Patent number: 10364512
    Abstract: It is provided that a multifilament and a braid that are capable of being processed into products in a wide range of temperature and are excellent in dimensional stability and abrasion resistance. A multifilament comprising 5 or more monofilaments, wherein the multifilament contains polyethylene having an intrinsic viscosity [?] of 5.0 dL/g or more and 40.0 dL/g or less and substantially including ethylene as a repeating unit, and shows 1000 times or more in number of reciprocating abrasions at break in an abrasion resistance test measured at a load of 5 cN/dtex in accordance with JIS L-1095.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: July 30, 2019
    Assignee: TOYOBO CO., LTD.
    Inventors: Yasunori Fukushima, Masayuki Shirako, Hirokazu Nishimura
  • Patent number: 10287711
    Abstract: It is provided that a multifilament and a braid that are capable of being processed into products in a wide range of temperature and are excellent in dimensional stability and abrasion resistance. A multifilament comprising 5 or more monofilaments, wherein the multifilament contains polyethylene having an intrinsic viscosity [?] of 5.0 dL/g or more and 40.0 dL/g or less and substantially including ethylene as a repeating unit, and wherein a difference between a maximum value and a minimum value in a ratio of a diffraction peak intensity of orthorhombic crystal (200) plane to a diffraction peak intensity of orthorhombic crystal (110) plane in a monofilament cross section is 0.22 or less.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: May 14, 2019
    Assignee: TOYOBO CO., LTD.
    Inventors: Yasunori Fukushima, Masayuki Shirako, Hirokazu Nishimura
  • Patent number: 10253160
    Abstract: The present invention is directed to a polyacetal stretched fiber of a polyacetal resin composition which contains a polyacetal resin and a fatty acid metal salt in an amount of 0.01 to 5 phr relative to the polyacetal resin, wherein the stretched fiber is obtained by stretching a fiber at a temperature of 100° C. or more to a temperature lower than the melting point of a polyacetal resin composition, and the fiber is obtained by melt spinning the polyacetal resin composition, and a fiber assembly comprising the stretched fiber as a main constituent.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: April 9, 2019
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventor: Akira Ito
  • Patent number: 10215257
    Abstract: Provided is a short rubber reinforcement fiber for short fiber-containing rubber compositions that are used for transmission belts for which friction transmission behavior has been stabilized and travel service life has been further improved. The present invention is a short fiber, which is the product of cutting an adhesive-treated synthetic long fiber multifilament yarn and is used by dispersing in a rubber composition, the short fiber being characterized in that the percentage of the number of non-adhesive-treated single yarns is 0-5%; and a method for manufacturing said short fibers, the method comprising a step for immersing a sudare-woven product in which the synthetic long fiber multifilament yarns have been sudare-woven in an adhesive treatment solution and then pressing at a nip pressure of 1.2-5.0 MPa using nip rolls, and a step for cutting the sudare-woven product bundles obtained to a specified length.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: February 26, 2019
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Yuki Takami, Fumiaki Ise, Hiroo Kawahara, Hirofumi Enokizono, Tatsuya Sawairi
  • Patent number: 10039855
    Abstract: Embodiments of the disclosure include elastomeric stretch fibers containing an anti-tack agent, methods of preparing the fiber, methods of using this fiber, articles including this fiber, and the like.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: August 7, 2018
    Assignee: INVISTA North America S.a.r.l.
    Inventors: James Michael Lambert, Young D. Nguyen, Robert O. Waldbauer, Jr., Hong Liu
  • Patent number: 9856375
    Abstract: The invention pertains to A polyannide composition [composition (C)] comprising: —from 20 to 95% wt of at least one polyamide [polyamide (A)]; —from 1 to 30% wt of at least one branched polyamide different from polyamide (A), said branched polyamide comprising recurring units derived from polycondensation of a mixture [mixture (B)] comprising: —at least one polyamine monomer comprising at least three amine functional groups selected from the group consisting of secondary amine group of formula —NH— and primary amine group of formula -MH2 [monomer (FN)], and—?-caprolactam (or derivates thereof); said branched polyamide possessing a concentration of amine end groups (AEG) and a concentration of carboxylic end groups (CEG) such that the difference AEG?CEG is of at least 100 meq/kg [polyamide (B)]; and—from 0.01 to 3.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: January 2, 2018
    Assignee: Rhodia Operations
    Inventors: Stéphane Jeol, Thierry Badel, Jean-François Thierry
  • Patent number: 9498561
    Abstract: A method for producing a flocculent three dimensional fibrous bioactive material using an electrospinning process includes electrospinning a biodegradable fiber by applying an electrical charge to a nozzle of an electrospinning apparatus such that a spinning solution contained therein is made into an electrospun fiber, which is attracted toward a collector container that is electrically grounded and is filled with an ethanol liquid; receiving the electrospun fiber emitted from the nozzle on a surface of the ethanol liquid in the collector container; recovering and drying the electrospun fiber to obtain the flocculent three dimensional fibrous bioactive material having a bulk density of from about 0.01 g/cm3 to about 0.1 g/cm3 as measured in accordance with JIS L 1097.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 22, 2016
    Assignees: Orthorebirth Co. Ltd., Nagoya Institute of Technology
    Inventors: Toshihiro Kasuga, Akiko Obata, Kie Fujikura, Yoshio Ota, Xianfeng Yao
  • Patent number: 9481113
    Abstract: A plant for making continuous yarns (30) made of silicon material comprises at least an extrusion station (12), into which the material is introduced in an amorphous condition, and extrusion means (15) which cause the material to exit from the extrusion station (12) along an extrusion axis (D). The plant also comprises a vulcanization station (16), located downstream of the extrusion station (12), at a determinate distance (“L”) therefrom, in which the continuous yarn (30) is vulcanized in a direction of treatment (T). The plant also comprises a drawing unit (18), disposed downstream of the vulcanization station (16).
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: November 1, 2016
    Assignee: LEMUR S.P.A.
    Inventor: Thomas Klotz
  • Patent number: 9441073
    Abstract: The present invention relates to a drawn PET fiber that can provide a cap ply cord and the like showing more improved modulus and good dimensional stability, a PET tire cord, and a tire including the same. The drawn PET fiber may be a fiber including 90 mol % or more of PET, of which the crystallinity is 53% or more, the amorphous orientation factor (AOF) is 0.15 or less, and the birefringence index is 0.14 to 0.16, after heat-treating the same at 230° C. for 1 minute under the initial load of 20 g/1000 d.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: September 13, 2016
    Assignee: KOLON INDUSTRIES, INC.
    Inventors: Il Chung, Ok-Hwa Jeon, Gi-Woong Kim
  • Patent number: 9169581
    Abstract: Processes for preparing ultra-high molecular weight polyethylene (“UHMW PE”) filaments and multi-filament yarns, and the yarns and articles produced therefrom. Each process produces UHMW PE yarns having tenacities of 45 g/denier to 60 g/denier or more at commercially viable throughput rates.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: October 27, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: Thomas Tam, John Armstrong Young, Ralf Klein, Mark Tallent, Henry Gerard Ardiff
  • Patent number: 9011739
    Abstract: Methods for making high quality polyimide fibers suitable for continuous industrial production are described. Polyimide fibers are continuously prepared from a polyamic acid solution through sequentially spinning the polyamic acid solution by either a wet or a dry-wet process, coagulating, drying or drying after washing, thermally treating and stretching the resulting polyamic acid fibers to obtain polyimide fibers, and winding polyimide fibers as prepared into rolls.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: April 21, 2015
    Assignee: Beijing University of Technology
    Inventors: Dezhen Wu, Hongqing Niu, Shengli Qi, Enlin Han, Xiaona Yan, Guofeng Tian, Xiaodong Wang
  • Patent number: 9005754
    Abstract: The present invention relates to an undrawn PET fiber and a drawn PET fiber those can provide a cap ply cord and the like showing more improved modulus and good dimensional stability, and a tire cord including the same. The undrawn PET fiber may be a fiber of which the crystallinity is 25% or more, the birefringence index is 0.085 to 0.11, the amorphous orientation factor (AOF) is 0.15 or less, and the melting temperature (Tm) is 258° C. or more.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: April 14, 2015
    Assignee: Kolon Industries, Inc.
    Inventors: Il Chung, Ok-Hwa Jeon, Gi-Woong Kim
  • Patent number: 9005752
    Abstract: The present invention relates to a drawn PET fiber which has good dimensional stability and can be applied to a cap ply cord for a pneumatic tire, a PET tire cord, their preparation methods, and a tire including the same.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: April 14, 2015
    Assignee: Kolon Industries, Inc.
    Inventors: Ok-Hwa Jeon, Il Chung, Gi-Woong Kim
  • Publication number: 20150087800
    Abstract: Provided is a para-type wholly aromatic copolyamide drawn fiber having a tensile elastic modulus of 630 cN/dtex or more. The fiber is obtained by subjecting a para-type wholly aromatic copolyamide raw material fiber to high-tension hot drawing under a tension and at a temperature within specific ranges.
    Type: Application
    Filed: June 6, 2013
    Publication date: March 26, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Toru Kurino, Naoya Komiya
  • Patent number: 8936740
    Abstract: A method for forming biodegradable fibers is provided. The method includes blending polylactic acid with a polyepoxide modifier to form a thermoplastic composition, extruding the thermoplastic composition through a die, and thereafter passing the extruded composition through a die to form a fiber. Without intending to be limited by theory, it is believed that the polyepoxide modifier reacts with the polylactic acid and results in branching of its polymer backbone, thereby improving its melt strength and stability during fiber spinning without significantly reducing glass transition temperature. The reaction-induced branching can also increase molecular weight, which may lead to improved fiber ductility and the ability to better dissipate energy when subjected to an elongation force. To minimize premature reaction, the polylactic acid and polyepoxide modifier are first blended together at a relatively low temperature(s).
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: January 20, 2015
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Vasily A. Topolkaraev, Ryan J. McEneany, Tom Eby, Tyler J. Lark
  • Patent number: 8911649
    Abstract: The present disclosure provides polyimide fibers with kidney-shaped cross-section and their preparation methods thereof, falling within the technical field of polyimide fiber. Polyimide fibers with kidney-shaped cross-sections are prepared by a continuous, integrated approach, starting from a polyamic acid solution prepared by reacting an aromatic dianhydride with an aromatic diamine. PAA nascent fibers with kidney-shaped cross-sections are obtained by adopting a spinneret having circular orifices under wet spinning process. The kidney-shaped cross-sections are obtained by varying the processing condition, including spinning speed, coagulation bath composition, coagulation temperature, and depth of coagulation bath. After washing and drying, polyamic acid nascent fibers are converted to polyimide fibers with kidney-shaped cross-sections under thermal curing. The integrated preparation methods are suitable for mass industrial production.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: December 16, 2014
    Assignee: Beijing University of Technology
    Inventors: Dezhen Wu, Enlin Han, Lun Li, Hongqing Niu, Gongping Shang, Shengli Qi, Xiaodong Wang
  • Publication number: 20140363669
    Abstract: Carbon nanotubes (CNT) fibers having a resistivity lower than 120 ??*cm are prepared by a wet spinning process including the steps of supplying a spin-dope of carbon nanotubes to a spinneret, extruding the spin-dope through at least one spinning hole in the spinneret to form spun carbon nanotubes fibers, and coagulating the spun carbon nanotubes fibers in a coagulation medium to form coagulated carbon nanotubes fibers. The carbon nanotubes fibers are drawn at a draw ratio higher than 1.0. The carbon nanotubes have a length of at least 0.5 ?m. The carbon nanotubes fibers can further have a resistivity lower than 50 ??*cm. At the same time, the CNT fibers can have high modulus.
    Type: Application
    Filed: September 7, 2012
    Publication date: December 11, 2014
    Applicants: WILLIAM MARSH RICE UNIVERSITY, TEIJIN ARAMID B.V.
    Inventors: Marcin Jan Otto, Jorrit Jong De, Ronald Folkert Waarbeek Ter, Ronald Edward Hoogerwerf, Anson Ma, Natnael Behabtu, Dmitri Tsentalovich, Colin Young, Matteo Pasquali
  • Patent number: 8906278
    Abstract: Processes for producing carbon fiber, the filament thereof and pre-oxidized fiber are provided. In one embodiment, the gel spinning of polyacrylonitrile filament is achieved by using small-molecule gelling agent, and the carbon fiber obtained thereby is increased by 15% to 40% in tensile strength and by 20% to 35% in toughness. In another embodiment, the melt spinning process of polyacrylonitrile is conducted by using imidazole type ion liquid as plasticizer, the process reduces environment pollution, is suitable for industrial production and the fiber produced thereby is improved in its strength. In yet another embodiment, polyacrylonitrile pre-oxidized fiber is produced by melt spinning, so low cost and controllable pre-oxidization of polyacrylonitrile can be achieved. In a further embodiment, high strength carbon fiber is manufactured by using polymer thickening agent.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: December 9, 2014
    Assignee: Donghua University
    Inventors: Muhuo Yu, Huaiping Rong, Keqing Han, Zhaohua Wang, Yiwei Zhang, Yincai Tian, Qinli Dong, Xi Zhao, Hui Zhang
  • Patent number: 8889049
    Abstract: An improved process for solution spinning of ultra-high molecular weight polyethylene (UHMW PE) filaments, wherein the 10 wt % solution of the UHMW PE in mineral oil at 250° C. has a Cogswell extensional viscosity and a shear viscosity within select ranges.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: November 18, 2014
    Assignee: Honeywell International Inc
    Inventors: Thomas Y. Tam, John A. Young, Qiang Zhou, Conor J. Twomey, Charles Arnett
  • Patent number: 8870559
    Abstract: A melt spinning apparatus has an apparatus body, and the apparatus body includes a spinning nozzle through which a molten resin is extruded into a filament, a primary air channel for directing primary airflow to the filament of the molten resin extruded from the spinning nozzle, and a secondary air channel for directing secondary airflow to the filament at a position downstream of the primary air channel. A part, which is closer to the spinning nozzle, of a wall of the secondary air channel that defines an air exit of the secondary air channel is chamfered to straighten the secondary airflow.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: October 28, 2014
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Mai Oyamada, Hiroshi Koyama
  • Patent number: 8858851
    Abstract: The present invention discloses a process for producing low-titer, high-strength and high-modulus polyethylene fibers, comprising the following steps: dissolving the ultra-high molecular weight polyethylene into paraffin oil with a low viscosity to form a spinning solution with a concentration of 3˜15%; extruding the spinning solution through a thin spinneret with at least 10 orifices having a diameter ? of 0.7˜0.8 mm and a length/diameter ratio of 10˜12, by applying a high pressure in the range of 2.5±1.0 MPa to the spinning solution, such that the fluid in the orifices is extruded at a shear rate of 200˜3 500 sec?1; and then performing a jet stretch at a deformation rate of 200˜5 000 min?1 within an air-gap of 10˜15 mm between the spinneret and the quench bath surface; feeding the jet-stretched fluid into the quench bath to form gel filaments; extracting and drying the gel filaments; and performing a multistage ultrahigh post stretch on the dried gel filaments with a stretch ratio of 15 or less.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: October 14, 2014
    Assignee: Hunan Zhongtai Special Equipment Co., Ltd.
    Inventors: Nianci Yang, Yuanjun Zhang, Bo Gao, Zhiquan Wu, Mingqing Lin, Chuanqing Wu, Yong Guo, Yunbo Zhou, Haijun Lin
  • Publication number: 20140295185
    Abstract: Disclosed herein are monofilament fibers comprising at least one polymeric resin and at least one coated filler, wherein the at least one coated filler has an average particle size of less than or equal to about 3 microns and/or has a top cut of less than or equal to about 10 microns, and wherein the at least one coated filler is present in an amount of less than or equal to about 50% by weight, relative to the total weight of the monofilament fibers. Also disclosed herein are methods for producing monofilament fibers comprising adding ground calcium carbonate to at least one polymeric resin and extruding the resulting mixture.
    Type: Application
    Filed: February 28, 2014
    Publication date: October 2, 2014
    Applicant: Imerys Pigments, Inc.
    Inventor: LARRY McAMISH
  • Patent number: 8845938
    Abstract: A method of manufacturing a polyacrylonitrile fiber includes a spinning process in which a spinning dope including polyacrylonitrile is spun; a first drawing process; a drying process; and a second hot drawing process in this order.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: September 30, 2014
    Assignee: Toray Industries, Inc.
    Inventors: Tomoko Ichikawa, Takashi Ochi, Akira Kishiro, Yasutaka Kato, Takashi Shibata, Masafumi Ise
  • Publication number: 20140288256
    Abstract: Disclosed are a method for preparing gelatinized pre-oriented filaments and the gelatinized pre-oriented filaments prepared by the method. The method comprises: feeding a spinning dope into a twin-screw extruder for blending and extruding the same to obtain a first spinning solution having a non-Newtonian index of 0.1-0.8 and a structural viscosity index of 10-50; feeding the first spinning solution into a spinning box, and drawing at a spinneret with a factor of 5-20 so as to obtain a second spinning solution; and flash cooling and curing the second spinning solution so as to obtain the gelatinized pre-oriented filaments. Also provided are a method for preparing ultra-high molecular weight polyethylene fibers by using the above method and the fibers prepared by this method.
    Type: Application
    Filed: June 8, 2012
    Publication date: September 25, 2014
    Applicant: BEIJING TONGYIZHONG SPECIALTY FIBRE TECHNOLOGY & DEVELOPMENT CO., LTD.
    Inventors: Peng He, Xingliang Huang, Fengqi Lin
  • Patent number: 8840823
    Abstract: A method for producing a polyglycolic acid fiber, including: obtaining undrawn yarns by melt spinning a polyglycolic acid resin; keeping the undrawn yarns under a temperature condition of 1 to 20° C.; obtaining drawn yarns by drawing the kept undrawn yarns; and, if necessary obtaining a staple fiber by cutting the drawn yarns.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: September 23, 2014
    Assignee: Kureha Corporation
    Inventors: Hiroyuki Sato, Masahiro Yamazaki, Ryo Kato, Moriaki Arasaki, Kotaku Saigusa
  • Publication number: 20140262099
    Abstract: A paper machine clothing (PMC) fabric includes a plurality of monofilament yarns, at least some of the monofilament yarns having a composition formed of polyethylene terephthalate (PET). The PET monofilament yarns have an abrasion resistance of greater than 6,000 cycles.
    Type: Application
    Filed: July 9, 2013
    Publication date: September 18, 2014
    Inventors: Brian Good, Vikram Dhende
  • Publication number: 20140262098
    Abstract: A paper machine clothing (PMC) fabric includes a plurality of monofilament yarns, at least some of the monofilament yarns having a composition formed of polyethylene terephthalate (PET). The PET monofilament yarns have an abrasion resistance of greater than 6,000 cycles.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: VOITH PATENT GMBH
    Inventors: Brian Good, Vikram Dhende
  • Publication number: 20140265279
    Abstract: The purpose of the present invention is to provide a synthetic fiber which is for use in fabrics having uniform fiber density, permeability and the like, is appropriate for high-density, high-speed weaving, and exhibits excellent weft insertion stability. This synthetic fiber is characterized by having: a fiber density of 200-720 dtex; an average intermediate loading modulus of more than 75 cN/dtex and less than 150 cN/dtex; and a variation coefficient of the intermediate modulus of 5% or less.
    Type: Application
    Filed: December 7, 2011
    Publication date: September 18, 2014
    Inventors: Fumiaki Ise, Shingo Mizuno
  • Publication number: 20140246802
    Abstract: Absorbable polyester fibers, braids, and surgical meshes with prolonged strength retention have been developed. These devices are preferably derived from biocompatible copolymers or nomopolymers of 4-hydroxybutyrate. These devices provide a wider range of in vivo strength retention properties than are currently available, and could offer additional benefits such as anti-adhesion properties, reduced risks of infection or other post-operative problems resulting from absorption and eventual elimination of the device, and competitive cost. The devices may also be particularly suitable for use in pediatric populations where their absorption should not hinder growth, and provide in all patient populations wound healing with long-term mechanical stability. The devices may additionally he combined with autologous, allogenic and/or xenogenic tissues to provide implants with improved mechanical, biological and handling properties.
    Type: Application
    Filed: May 13, 2014
    Publication date: September 4, 2014
    Inventors: David P. Martin, Said Rizk, Ajay Ahuja, Simon F. Williams
  • Patent number: 8808596
    Abstract: A biodegradable filament of polyglycolic acid resin having practical properties represented by high tensile strength and knot strength is produced. A polyglycolic acid resin having a residual monomer content of below 0.5 wt. % is melt-spun, quenched in a liquid bath of at most 10° C. and then stretched in a liquid bath of 60-83° C. to produce a polyglycolic acid resin filament having a tensile strength of at least 750 MPa and a knot strength of at least 600 MPa.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: August 19, 2014
    Assignee: Kureha Corporation
    Inventors: Satoshi Hashimoto, Kazuyuki Yamane, Juichi Wakabayashi, Hirokazu Matsui
  • Patent number: 8808594
    Abstract: A method is disclosed for producing a coform fibrous materials comprising the steps of supplying a first fiber forming stream comprising a first phase comprising a polymer melt and a second phase comprising a pressurized gas to a two-phase flow nozzle, supplying a separate second stream containing at least one secondary material to the two-phase flow nozzle, combining the first fiber forming stream and the second stream to form a composite fiber forming stream and fibrillating the composite fiber forming stream into a coform fibrous web. Superabsorbent and filtration coform fibrous materials for filtration and produced using the method are also disclosed.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: August 19, 2014
    Assignee: Verdex Technologies, Inc.
    Inventors: Larry Marshall, Michael Bryner, Gary Huvard
  • Patent number: 8801985
    Abstract: A production method for a carbon fiber precursor fiber bundle and a production apparatus of the carbon fiber precursor fiber bundle. A carbon fiber precursor fiber bundle that has a degree of intermingle of 1 m?1 or less between small tows, consists of substantially straight fibers without imparted crimp, a tow of which straight fibers has a moisture content of less than 10% by mass when housed in a container, and has a widthwise dividing capability to maintain a form of a single aggregate of tows when housed in a container, taken out from the container and guided into a firing step, and to divide into a plurality of small tows in the firing step by the tension generated in the firing step.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Katsuhiko Ikeda, Atsushi Kawamura
  • Patent number: 8790554
    Abstract: A method of preparing meta-aramid fibers includes the operations of polymerization, neutralization and spinning using m-phenylenediamine and isophthaloyl chloride as raw materials, wherein the neutralizing agent is added in an amount that is sufficient only for neutralizing a part of hydrogen chloride, so that the resultant spin dope of polyisophthaloyl metaphenylene diamine contains salts produced by the neutralization reaction and a part of unneutralized hydrogen chloride. The method of the invention has a short production line with reduced amount of the neutralizing agent, therefore both the costs of raw materials and the production energy consumption are saved. The fibers prepared according to the method of the invention have reduced gray scale to improve the electrical insulation properties of the fibers.
    Type: Grant
    Filed: September 5, 2011
    Date of Patent: July 29, 2014
    Inventor: Zhou Zhong
  • Patent number: 8771582
    Abstract: The present invention is a bioactive, nanofibrous material construct which is manufactured using a unique electrospinning perfusion methodology. One embodiment provides a nanofibrous biocomposite material formed as a discrete textile fabric from a prepared liquid admixture of (i) a non-biodegradable durable synthetic polymer; (ii) a biologically active agent; and (iii) a liquid organic carrier. These biologically-active agents are chemical compounds which retain their recognized biological activity both before and after becoming non-permanently bound to the formed textile material; and will become subsequently released in-situ as discrete freely mobile agents from the fabric upon uptake of water from the ambient environment.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: July 8, 2014
    Assignees: BioScurfaces, Inc., Clemson University, Rhode Island Board of Education
    Inventors: Matthew D. Phaneuf, Philip J. Brown, Martin J. Bide
  • Patent number: 8758657
    Abstract: Absorbable polyester fibers, braids, and surgical meshes with prolonged strength retention have been developed. These devices are preferably derived from biocompatible copolymers or homopolymers of 4-hydroxybutyrate. These devices provide a wider range of in vivo strength retention properties than are currently available, and could offer additional benefits such as anti-adhesion properties, reduced risks of infection or other post-operative problems resulting from absorption and eventual elimination of the device, and competitive cost. The devices may also be particularly suitable for use in pediatric populations where their absorption should not hinder growth, and provide in all patient populations wound healing with long-term mechanical stability. The devices may additionally be combined with autologous, allogenic and/or xenogenic tissues to provide implants with improved mechanical, biological and handling properties.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: June 24, 2014
    Assignee: Tepha, Inc.
    Inventors: David P. Martin, Said Rizk, Ajay Ahuja, Simon F. Williams
  • Patent number: 8753741
    Abstract: A fine denier poly(trimethylene arylate) spun drawn fiber is characterized by high denier uniformity. A process for preparing uniform fine denier yarns at spinning speeds of 4000 to 6000 m/min is further disclosed. The poly(trimethylene arylate) fiber hereof comprises 0.1 to 3% by weight of polystyrene dispersed therewithin. Fabrics prepared therefrom are also disclosed.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: June 17, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventor: W. Douglas Bates
  • Publication number: 20140103569
    Abstract: A continuous fastener element including: a coupling head; upper and lower leg portions; and a connecting portion wherein surfaces of the coupling head, the leg portions, and the connecting portion are each formed as a rough surface with a plurality of recesses. Furthermore, a head surface of the coupling head of the continuous fastener element is formed to have an average roughness Ra smaller than that of outer peripheral surfaces of the leg portions. Accordingly, gloss and luster of the continuous fastener element may be easily reduced or removed. Furthermore, when the slide fastener is formed, the resistance between the coupling heads of the left and right continuous fastener elements may be made small and the left and right element rows may smoothly engage with each other or disengage from each other.
    Type: Application
    Filed: December 19, 2013
    Publication date: April 17, 2014
    Applicant: YKK Corporation
    Inventors: Satoshi Matsumoto, Chin-yuan Huang
  • Patent number: 8668854
    Abstract: The disclosure relates to an apparatus and method for producing nanofibers and non-woven nanofibrous materials from polymer melts, liquids and particles using a two-phase flow nozzle. The process comprises supplying a first phase comprising a polymer melt and a second phase comprising a pressurized gas stream to a two-phase flow nozzle; injecting the polymer melt and the pressurized gas stream into a mixing chamber within the two-phase flow nozzle wherein the mixing chamber combines the polymer flow and pressurized gas into a two-phase flow; distributing the two-phase flow uniformly to a converging channel terminating into an channel exit wherein the converging channel accelerates the two-phase flow creating a polymeric film along the surface of the converging channel and fibrillating the polymeric film at the channel exit of the converging channel in the form of a plurality of nanofibers.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: March 11, 2014
    Assignee: Verdex Technologies, Inc.
    Inventors: Larry Marshall, Michael Bryner
  • Publication number: 20140061966
    Abstract: In an embodiment, a method of processing a polymer comprises: mixing polymer and solid carbon dioxide; introducing the polymer and solid carbon dioxide mixture to a hopper of a vented extruder; plasticizing the mixture to form a polymer melt with dissolved carbon dioxide; venting carbon dioxide as a gas before the die exit; and extruding the polymer melt through a die. In an embodiment, a method of making an article comprises: introducing a polymer powder to an extruder; introducing solid carbon dioxide powder to the extruder at the hopper; plasticizing and extruding the polymer and solid carbon dioxide mixture; venting the solid carbon dioxide before the die exit; extruding the polymer melt through a die to form pellets; and injection molding the polymer pellets without solid carbon dioxide to form molded articles.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 6, 2014
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Sumanda Bandyopadhyay, Sadasivam Gopalakrishnan, Sathish Ranganathan Kumar, Kaushik Banik, Zahir Bashir
  • Patent number: 8647741
    Abstract: The present invention aims to provide a polypropylene fiber (PP fiber) excellent in strength, heat resistance, and water-absorption properties, a method of producing the same, and a hydraulic composition, a rope, a sheet-shaped fiber structure, and a composite material with an organic polymer each using the PP fiber. The present invention provides: a PP fiber having a fiber having a fiber strength of 7 cN/dtex or more and having either or both of (i) DSC properties such that the endothermic peak shape by DSC is a single shape having a half width of 10° C. or lower and the melt enthalpy change (AH) is 125 J/ g and (ii) irregular properties such that the single fiber fineness is 0.i to 3 dtex and irregularities are formed on the surface.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: February 11, 2014
    Assignee: Kuraray Co., Ltd.
    Inventors: Takashi Katayama, Yoshihiro Iwasaki, Masakazu Nishiyama
  • Publication number: 20140035191
    Abstract: A three-dimensional netted structure having an upper surface, a lower surface, two side surfaces a left end surface, and a right end surface, including at least a plurality of filaments helically and randomly entangled and thermally bonded together, wherein the filaments are formed out of a thermoplastic resin by extrusion molding followed by cooling with a liquid; and the netted structure is four-surface molded, the upper surface, the lower surface and the two side surfaces being molded. An apparatus and a method for manufacturing the three-dimensional netted structure.
    Type: Application
    Filed: October 10, 2013
    Publication date: February 6, 2014
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki TAKAOKA
  • Patent number: 8641960
    Abstract: The present invention relates to a solution blow spinning method for the production of nonwoven webs of micro and nanofibers.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: February 4, 2014
    Assignee: The United States of America, as represented by the Secretary of Agriculture
    Inventors: Eliton S. Medeiros, Gregory M. Glenn, Artur P. Klamczynski, William J. Orts, Luiz H. C. Mattoso
  • Publication number: 20140018716
    Abstract: A method (400) of manufacturing a wound dressing is disclosed that includes obtaining alginate fibers (108) and the step (404) of spraying either the alginate fibers (108) or a dressing or dressing layer (610) of the alginate fibers with an aqueous solution (801) comprising a polysaccharide, which can be carboxymethylcellulose. The step of spraying can occur while the alginate fibers, dressing, or dressing layer are wet. A step (405) of flash drying can follow to remove the solute of the aqueous solution to leave the polysaccharide along the alginate. The step of spraying can be selective, such that only portions of the dressing layer include the polysaccharide.
    Type: Application
    Filed: July 16, 2012
    Publication date: January 16, 2014
    Inventor: Debashish Chakravarthy
  • Patent number: 8623247
    Abstract: Disclosed are water-dispersible fibers derived from sulfopolyesters having a Tg of at least 25° C. The fibers may contain a single sulfopolyester or a blend of a sulfopolyester with a water-dispersible or water-nondispersible polymer. Also disclosed are multicomponent fibers comprising a water dispersible sulfopolyester having a Tg of at least 57° C. and a water non-dispersible polymer. The multicomponent fibers may be used to produce microdenier fibers. Fibrous articles may be produced from the water-dispersible fibers, multicomponent fibers, and microdenier fibers. The fibrous articles include water-dispersible and microdenier nonwoven webs, fabrics, and multilayered articles such as wipes, gauze, tissue, diapers, panty liners, sanitary napkins, bandages, and surgical dressings. Also disclosed is a process for water-dispersible fibers, nonwoven fabrics, and microdenier webs.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: January 7, 2014
    Assignee: Eastman Chemical Company
    Inventors: William Alston Haile, Scott Ellery George, Wesley Raymond Hale, Waylon Lewellyn Jenkins
  • Patent number: 8623245
    Abstract: A colored high strength polyethylene fiber, preparation method and use thereof are provided, which are in the high molecular material field. The surface of said high strength polyethylene fiber is chromatic, grey or black. The strength of said high strength polyethylene fiber is 15-50 g/d, its modulus is 400-2000 g/d. The product of the present invention is colored, so it can be well applied to civil and military field. The preparation method of present invention has some advantages that technological process is simple, production efficiency is high, cost of production is low, performance of made fiber is excellent, and use-cost is reduced, compared with the prior art.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: January 7, 2014
    Assignee: Shandong ICD High Performance Fibres Co., Ltd.
    Inventor: Yi Ren
  • Patent number: 8608992
    Abstract: A method for producing one or more nanofibers includes providing (a) a solution comprising a polymer and a solvent, (b) a nozzle for ejecting the solution, and (c) a stationary collector disposed a distance d apart from the nozzle. A voltage is applied between the nozzle and the stationary collector, and a jet of the solution is ejected from the nozzle toward the stationary collector. An electric field intensity of between about 0.5 and about 2.0 kV/cm is maintained, where the electric field intensity is defined as a ratio of the voltage to the distance d. At least a portion of the solvent from the stream is evaporated, and one or more polymer nanofibers are deposited on the stationary collector as the stream impinges thereupon. Each polymer nanofiber has an average diameter of about 500 nm or less and may serve as a precursor for carbon fiber production.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: December 17, 2013
    Assignee: The Board of Trustees of the University of Illinois
    Inventors: Ioannis Chasiotis, Mohammad Naraghi, Salman N. Arshad
  • Publication number: 20130267139
    Abstract: Disclosed is a polyester yarn that can be used in a fabric for an airbag. In particular, a polyester yarn having a diethylene glycol content of 1.1 to 2.5 wt % and initial modulus of 100 g/d or less, a production method thereof, and a fabric for an airbag produced therefrom are disclosed. The polyester yarn has excellent moisture and heat resistance and light resistance, and maintained excellent mechanical properties after long-term aging under high temperature and high humidity conditions. Therefore, when applied to a fabric for an airbag, the polyester yarn provides excellent packing property, shape stability, and gas barrier effect, and the impact applied to a passenger is minimized, thereby safely protecting the passenger at the same time.
    Type: Application
    Filed: December 14, 2010
    Publication date: October 10, 2013
    Applicant: KOLON INDUSTRIES, INC.
    Inventors: Young-Jo Kim, Sang-Mok Lee, Young-Soo Lee, Gi-Woong Kim