Patents by Inventor Qianhan LIU

Qianhan LIU 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).

  • Flame-retardant polyester fiber and its preparation method
    Patent number: 11174346
    Abstract: A flame-retardant polyester fiber obtained by spinning flame-retardant polyester and irradiating with ultraviolet light and having a limiting oxygen index value of greater than 30. Flame retardant 2-carboxyethylphenylphosphinic acid to improve the flame retardant properties of polyester, the use of polyester containing unsaturated double bond in UV irradiation, the double bond opens to form a crosslinking point, the formation of a certain amount of the network structure improves the heat-resistant temperature of the poly-fiber and improves the anti-dripping performance of the polyester fiber.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: November 16, 2021
    Assignee: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.
    Inventors: Lili Wang, Lixin Yin, Qianhan Liu, Feng Li
  • Industrial polyester and its preparation method
    Patent number: 10358525
    Abstract: A polyester obtained by the esterification of terephthalic acid and ethylene glycol and the polycondensation catalysed by a mixture of magnesium ethylene glycol and antimony ethylene glycol followed by granulation. In the polyester sections, the carboxyl end group is less than 15 mol/t, the mass percentage of oligomer is lower than 0.5%, and weight percentage of diethylene glycol is lower than 0.5%.
    Type: Grant
    Filed: June 12, 2016
    Date of Patent: July 23, 2019
    Assignee: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.
    Inventors: Hongwei Fan, Fangming Tang, Xiaoyu Wang, Wengang Li, Lili Wang, Shanshui Wang, Qianhan Liu, Zangzang Niu
  • An industrial polyester and its preparation method
    Publication number: 20180201726
    Abstract: A polyester obtained by the esterification of terephthalic acid and ethylene glycol and the polycondensation catalysed by a mixture of magnesium ethylene glycol and antimony ethylene glycol followed by granulation. In the polyester sections, the carboxyl end group is less than 15 mol/t, the mass percentage of oligomer is lower than 0.5%, and weight percentage of diethylene glycol is lower than 0.5%.
    Type: Application
    Filed: June 12, 2016
    Publication date: July 19, 2018
    Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.
    Inventors: Hongwei Fan, Fangming TANG, Xiaoyu WANG, Wengang LI, Lili WANG, Shanshui WANG, Qianhan LIU, Zangzang NIU
  • A flame-retardant polyester fiber and its preparation method
    Publication number: 20180201728
    Abstract: A flame-retardant polyester fiber obtained by spinning flame-retardant polyester and irradiating with ultraviolet light and having a limiting oxygen index value of greater than 30. Flame retardant 2-carboxyethylphenylphosphinic acid to improve the flame retardant properties of polyester, the use of polyester containing unsaturated double bond in UV irradiation, the double bond opens to form a crosslinking point, the formation of a certain amount of the network structure improves the heat-resistant temperature of the poly-fiber and improves the anti-dripping performance of the polyester fiber.
    Type: Application
    Filed: October 25, 2016
    Publication date: July 19, 2018
    Applicant: JIANGSU HENGLI CHEMICAL FIBRE CO., LTD.
    Inventors: Lili WANG, LiXin YIN, Qianhan LIU, Feng LI