Patents Assigned to Yeu Ming Tai Chemical Industrial Co., Ltd.
  • Patent number: 8158042
    Abstract: A polytetrafluoroethylene (PTFE) fiber includes a filament obtained by partially slitting an oriented PTFE film in a lengthwise direction of the film. Emboss processing is conducted linearly along the lengthwise direction of the film and like a zigzag shape or a convexo-concave shape in a width direction of the film, followed by slitting, whereby the filament includes a network structure in which single fibrils that are opened partially are arranged regularly. A PTFE short fiber is obtained by cutting the above filament and includes a branch structure. Thereby, a PTFE fiber with a small average fineness of single fibrils, a uniform fineness and a single-peak distribution with the peak at a center of fineness and with a high production yield and uniform and stable branch structure can be provided and a method for manufacturing the PTFE fiber can be provided.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: April 17, 2012
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, Chin-Chun Chou, Chin-Cha Chou, Shia-Chung Chen, Wen-I Kuo, Lei-Ti Huang
  • Publication number: 20100319313
    Abstract: The PTFE real twist yarn of the present invention is a PTFE real twist yarn obtained by twisting a polytetrafluoroethylene (PTFE) multi-filament slit yarn. The yarn has a circular cross-section with a circularity in the range of 10/8 to 10/10, where the circularity is expressed by the ratio between the major axis width and the minor axis width, the average fineness of filaments is in the range of 1.5 to 200 dtex, a fineness D is in the range of 50 to 6000 dtex, and a twist coefficient K expressed by Formula (1) is in the range of 10000 to 35000: twist coefficient K=number of twists T×(the fineness D of the PTFE real twist yarn)1/2??(1) where the number of twists T denotes the number of twists per meter and the fineness D is a total fineness.
    Type: Application
    Filed: June 14, 2010
    Publication date: December 23, 2010
    Applicant: YEU MING TAI CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: James HUANG, Chin-Chun CHOU, Chin-Cha CHOU, Wen-I KUO
  • Patent number: 7374679
    Abstract: The present invention provides an asymmetric porous PTFE membrane for a filter having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which collection efficiency, air permeability and pressure loss are improved. Specifically, the present invention relates to an asymmetric porous PTFE membrane for a filter comprising a dense skin layer and a continuously foamed porous layer, wherein (1) the contact angle of water to the surface of the skin layer is 120 to 140°; and (2) the diffuse reflectance of light is 91 to 94%.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: May 20, 2008
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, William Chou, David Chou, Juin-Yih Lai, Kueir-Rarn Lee, Da-Ming Wang, Ruoh-Chyu Ruaan, Tian-Tsair Wu
  • Patent number: 7309663
    Abstract: The present invention provides an asymmetric porous PTFE membrane for clothing having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which durability and water vapor permeability are improved by strengthening adhesion strength with fabric. Specifically, the present invention relates to an asymmetric porous PTFE membrane for clothing comprising a dense skin layer and a continuously foamed porous layer, wherein (1) the contact angle of water to the surface of the skin layer is 120 to 140°; and (2) the diffuse reflectance of light of the skin layer is 91 to 94%.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: December 18, 2007
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, William Chou, David Chou, Juin-Yih Lai, Kueir-Rarn Lee, Da-Ming Wang, Ruoh-Chyu Ruaan, Tian-Tsair Wu
  • Publication number: 20060257655
    Abstract: A polytetrafluoroethylene (PTFE) fiber includes a filament obtained by partially slitting an oriented PTFE film in a lengthwise direction of the film. Emboss processing is conducted linearly along the lengthwise direction of the film and like a zigzag shape or a convexo-concave shape in a width direction of the film, followed by slitting, whereby the filament includes a network structure in which single fibrils that are opened partially are arranged regularly. A PTFE short fiber is obtained by cutting the above filament and includes a branch structure. Thereby, a PTFE fiber with a small average fineness of single fibrils, a uniform fineness and a single-peak distribution with the peak at a center of fineness and with a high production yield and uniform and stable branch structure can be provided and a method for manufacturing the PTFE fiber can be provided.
    Type: Application
    Filed: July 13, 2006
    Publication date: November 16, 2006
    Applicant: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, Chin-Chun Chou, Chin-Cha Chou, Shia-Chung Chen, Wen-I Kuo, Lei-Ti Huang
  • Patent number: 7108912
    Abstract: A polytetrafluoroethylene (PTFE) fiber includes a filament obtained by partially slitting an oriented PTFE film in a lengthwise direction of the film. Emboss processing is conducted linearly along the lengthwise direction of the film and like a zigzag shape or a convexo-concave shape in a width direction of the film, followed by slitting, whereby the filament includes a network structure in which single fibrils that are opened partially are arranged regularly. A PTFE short fiber is obtained by cutting the above filament and includes a branch structure. Thereby, a PTFE fiber with a small average fineness of single fibrils, a uniform fineness and a single-peak distribution with the peak at a center of fineness and with a high production yield and uniform and stable branch structure can be provided and a method for manufacturing the PTFE fiber can be provided.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: September 19, 2006
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, Chin-Chun Chou, Chin-Cha Chou, Shia-Chung Chen, Wen-I Kuo, Lei-Ti Huang
  • Publication number: 20050221084
    Abstract: A polytetrafluoroethylene (PTFE) fiber includes a filament obtained by partially slitting an oriented PTFE film in a lengthwise direction of the film. Emboss processing is conducted linearly along the lengthwise direction of the film and like a zigzag shape or a convexo-concave shape in a width direction of the film, followed by slitting, whereby the filament includes a network structure in which single fibrils that are opened partially are arranged regularly. A PTFE short fiber is obtained by cutting the above filament and includes a branch structure. Thereby, a PTFE fiber with a small average fineness of single fibrils, a uniform fineness and a single-peak distribution with the peak at a center of fineness and with a high production yield and uniform and stable branch structure can be provided and a method for manufacturing the PTFE fiber can be provided.
    Type: Application
    Filed: March 8, 2005
    Publication date: October 6, 2005
    Applicant: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, Chin-Chun Chou, Chin-Cha Chou, Shia-Chung Chen, Wen-I Kuo, Lei-Ti Huang
  • Patent number: 6949287
    Abstract: A PTFE fiber with a low density and having a network structure that allows effective performances to be given to its finished articles and a method for manufacturing the PTFE fiber are provided. The PTFE fiber is a filament obtained by giving a heat treatment to a biaxially stretched polytetrafluoroethylene (PTFE) film, followed by slitting partially in a lengthwise direction of the film. The filament includes a network structured fiber in which single fibers are opened partially in the width direction, and the filament is an aggregate of the single fibers. This fiber is manufactured as the filament by feeding a biaxially stretched PTFE film to a revolving pin roll with needles implanted thereon, the needles being arranged so that a plurality of rows run obliquely along a circumferential direction at substantially regular intervals, and slitting the film partially in a lengthwise direction. This PTFE filament may be cut into short fibers with a cutter. The short fibers include a branch structure.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: September 27, 2005
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, Chin-Chun Chou, Chin-Cha Chou, Shia-Chung Chen, Wen-I Kuo, Lei-Ti Huang
  • Patent number: 6871806
    Abstract: A nanomaterial processing system is constructed to include a compressor adapted to compress a flow of air/liquid into a high-pressure flow of air/liquid, a material feeder adapted to feed a material into the high-pressure flow of air/liquid passing out of the compressor, enabling the fed material to be mixed with the high-pressure flow of air/liquid into a high-pressure material flow; a shunt collider adapted to shunt the high-pressure material flow into two sub-flows and to let the shunt sub-flows to collide into a collided material flow, and a high-speed cutting unit, which uses a diamond coating-coated cutting wheel to cut solid substances the collided material flow.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: March 29, 2005
    Assignees: Yeu Ming Tai Chemical Industrial Co., Ltd., Precision Machinery Research and Development Center
    Inventors: I-Shou Tsai, Pen-Yi Liao, Chin-Chun Chou, Wen-I Kuo, Lei-Ti Huang
  • Patent number: 6852223
    Abstract: The present invention relates to an asymmetric porous polytetrafluoroethylene membrane comprising a dense skin layer and a continuously foamed porous layer, (1) the dense skin layer having a surface roughness Ra of 20 to 165 nm; (2) the dense skin layer having a contact angle for water of 120 to 135°; (3) the porous layer having a maximum pore diameter of 0.03 to 1.0 ?m; and (4) the membrane having a total porosity of 20 to 70%. The asymmetric porous PTFE membrane has an ability to separate each liquid component from a liquid-liquid homogeneous mixture in addition to known properties such as water permeability resistance, gas permeability, sealing property and electric property, wherein change of these properties over time is small.
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: February 8, 2005
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, William Chou, David Chou, Juin-Yih Lai, Kueir-Rarn Lee, Da-Ming Wang, Ruoh-Chyu Ruaan, Tian-Tsair Wu
  • Publication number: 20040198121
    Abstract: The present invention provides an asymmetric porous PTFE membrane for clothing having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which durability and water vapor permeability are improved by strengthening adhesion strength with fabric.
    Type: Application
    Filed: March 25, 2004
    Publication date: October 7, 2004
    Applicant: YEU MING TAI CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: James Huang, William Chou, David Chou, Juin-Yih Lai, Kueir-Rarn Lee, Da-Ming Wang, Ruoh-Chyu Ruaan, Tian-Tsair Wu
  • Publication number: 20040195173
    Abstract: The present invention provides an asymmetric porous PTFE membrane for a filter having little change over time and conventionally known properties of a porous PTFE molded article such as water permeability resistance, air permeability, sealing properties and electric properties, in which collection efficiency, air permeability and pressure loss are improved.
    Type: Application
    Filed: March 24, 2004
    Publication date: October 7, 2004
    Applicant: YEU MING TAI CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: James Huang, William Chou, David Chou, Juin-Yih Lai, Kueir-Rarn Lee, Da-Ming Wang, Ruoh-Chyu Ruaan, Tian-Tsair Wu
  • Publication number: 20040175567
    Abstract: A PTFE fiber with a low density and having a network structure that allows effective performances to be given to its finished articles and a method for manufacturing the PTFE fiber are provided. The PTFE fiber is a filament obtained by giving a heat treatment to a biaxially stretched polytetrafluoroethylene (PTFE) film, followed by slitting partially in a lengthwise direction of the film. The filament includes a network structured fiber in which single fibers are opened partially in the width direction, and the filament is an aggregate of the single fibers. This fiber is manufactured as the filament by feeding a biaxially stretched PTFE film to a revolving pin roll with needles implanted thereon, the needles being arranged so that a plurality of rows run obliquely along a circumferential direction at substantially regular intervals, and slitting the film partially in a lengthwise direction. This PTFE filament may be cut into short fibers with a cutter. The short fibers include a branch structure.
    Type: Application
    Filed: January 20, 2004
    Publication date: September 9, 2004
    Applicant: YEU MING TAI CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: James Huang, Chin-Chun Chou, Chin-Cha Chou, Shia-Chung Chen, Wen-I Kuo, Lei-Ti Huang
  • Patent number: 6702971
    Abstract: To provide a method of producing a uniaxially stretched polytetrafluoroethylene gasket tape, which comprises: (1) a step for preparing a paste comprising a mixture of a polytetrafluoroethylene powder obtained by emulsion polymerization and an extrusion aid, (2) a step for extruding the paste by means of an extruder equipped with a die which has plural separators inside an orifice thereof having a rectangular cross section, (3) a step for rolling, in the extruding direction, an extrudate having slit lines to give a rolled polytetrafluoroethylene sheet, (4) a step for uniaxially stretching the rolled sheet in the rolling direction after removing the extrusion aid from the rolled sheet, and (5) a step for heat-treating the obtained uniaxially stretched polytetrafluoroethylene sheet. The die of the extruder has plural sheet-like separators in the orifice thereof having a rectangular cross section.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: March 9, 2004
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, William Chou, David Chou, Shia-Chung Chen, Woh-Jer Lee, Lei-Ti Huang, Ching-Yao Huang
  • Publication number: 20030089660
    Abstract: The present invention relates to an asymmetric porous polytetrafluoroethylene membrane comprising a dense skin layer and a continuously foamed porous layer, (1) the dense skin layer having a surface roughness Ra of 20 to 165 nm; (2) the dense skin layer having a contact angle for water of 120 to 135°; (3) the porous layer having a maximum pore diameter of 0.03 to 1.0 &mgr;m; and (4) the membrane having a total porosity of 20 to 70%. The asymmetric porous PTFE membrane has an ability to separate each liquid component from a liquid-liquid homogeneous mixture in addition to known properties such as water permeability resistance, gas permeability, sealing property and electric property, wherein change of these properties over time is small.
    Type: Application
    Filed: October 28, 2002
    Publication date: May 15, 2003
    Applicant: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, William Chou, David Chou, Juin-Yih Lai, Kueir-Rarn Lee, Da-Ming Wang, Ruoh-Chyu Ruaan, Tian-Tsair Wu
  • Publication number: 20030015821
    Abstract: To provide a method of producing a uniaxially stretched polytetrafluoroethylene gasket tape, which comprises: (1) a step for preparing a paste comprising a mixture of a polytetrafluoroethylene powder obtained by emulsion polymerization and an extrusion aid, (2) a step for extruding the paste by means of an extruder equipped with a die which has plural separators inside an orifice thereof having a rectangular cross section, (3) a step for rolling, in the extruding direction, an extrudate having slit lines to give a rolled polytetrafluoroethylene sheet, (4) a step for uniaxially stretching the rolled sheet in the rolling direction after removing the extrusion aid from the rolled sheet, and (5) a step for heat-treating the obtained uniaxially stretched polytetrafluoroethylene sheet. The die of the extruder has plural sheet-like separators in the orifice thereof having a rectangular cross section.
    Type: Application
    Filed: November 2, 2001
    Publication date: January 23, 2003
    Applicant: YEU MING TAI CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: James Huang, William Chou, David Chou, Shia-Chung Chen, Woh-Jer Lee, Lei-Ti Huang, Ching-Yao Huang
  • Patent number: 6150618
    Abstract: A testing device includes a housing having a number of openings formed in a partition for receiving a number of cups. The housing includes an x-axis track, a y-axis track and a z-axis track. A scale is moved along the x-axis track and the y-axis track of the housing to a position below the cups and is elevated to move the cups upward and to measure the changes of the weight of the cups in a suitable time interval. The cups may receive the desiccating agent, water or the plants whose weight are required to be measured frequently.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: November 21, 2000
    Assignees: Yeu Ming Tai Chemical Industrial Co., Ltd., Precision Machinery Research & Development Center
    Inventor: Chin Chun Chou
  • Patent number: 5098625
    Abstract: A process for preparing an improved expanded porous polytetrafluorethylene product having a higher density and improved cold flow properties and prepared from a paste formed from a polytetrafluoroethylene resin and a lubricant. The method includes extruding the paste through an extrusion die at a reduction ratio of less than 100, calendering the extrudate, removing the lubricant, and heating the extrudate to a temperature greater than the crystalline melting point of polytetrafluoroethylene but generally below the temperature at which thermal decomposition becomes appreciable while concurrently expanding the extrudate to at least twice its original length.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: March 24, 1992
    Assignee: Yeu Ming Tai Chemical Industrial Co., Ltd.
    Inventors: James Huang, William Chou, David Chou