Patents by Inventor Pyung-Youl Park

Pyung-Youl Park has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyolefin fiber and method of producing the same
    Patent number: 7867607
    Abstract: A polyolefin fiber includes 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of titanium dioxide (TiO2). The polyolefin fiber may further include 0.2 to 1.0 wt % of spin finish provided on a surface thereof. The polyolefin fiber is spun to have a circular section, a modified cross-section including an X-shaped section, a Y-shaped section, a deltaic section, an oval section, a diamond section, a bladebone-shaped section, and a combined section thereof, or a combined section of the circular section and the modified cross-section. A method of producing a polyolefin fiber includes (a) melt extruding a composition which contains 93 to 99 wt % of polyolefin resin, 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of any one titanium dioxide (TiO2) of rutile titanium dioxide, anatase titanium dioxide, and brookite titanium dioxide at 240 to 300° C. and performing winding at a spin speed of 500 to 2,000 mpm to produce a undrawn yarn, and (b) drawing the undrawn yarn at a draw ratio of 1.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: January 11, 2011
    Assignee: Kolonglotech, Inc.
    Inventors: Pyung-Youl Park, Dong-Hun Kwak
  • POLYOLEFIN FIBER AND METHOD OF PRODUCING THE SAME
    Publication number: 20090093180
    Abstract: A polyolefin fiber includes 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of titanium dioxide (TiO2). The polyolefin fiber may further include 0.2 to 1.0 wt % of spin finish provided on a surface thereof. The polyolefin fiber is spun to have a circular section, a modified cross-section including an X-shaped section, a Y-shaped section, a deltaic section, an oval section, a diamond section, a bladebone-shaped section, and a combined section thereof, or a combined section of the circular section and the modified cross-section. A method of producing a polyolefin fiber includes (a) melt extruding a composition which contains 93 to 99 wt % of polyolefin resin, 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of any one titanium dioxide (TiO2) of rutile titanium dioxide, anatase titanium dioxide, and brookite titanium dioxide at 240 to 300° C. and performing winding at a spin speed of 500 to 2,000 mpm to produce a undrawn yarn, and (b) drawing the undrawn yarn at a draw ratio of 1.
    Type: Application
    Filed: December 5, 2007
    Publication date: April 9, 2009
    Applicant: KolonGlotech, Inc.
    Inventors: Pyung-Youl Park, Dong-Hun Kwak