Patents by Inventor Heechang Woo

Heechang Woo 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).

  • Patent number: 11969707
    Abstract: The method for preparing a super absorbent polymer according to the present disclosure has a feature that it is possible to reduce the generation of a fine powder during production of the super absorbent polymer while maintaining excellent physical properties of the super absorbent polymer, including centrifuge retention capacity (CRC) and vortex removal time.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: April 30, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Jaeyul Kim, Jong Hun Song, Gicheul Kim, Yoon Jae Min, Ki Hyun Kim, Seul Ah Lee, In Yong Jeong, Heechang Woo
  • Publication number: 20230381744
    Abstract: Provided is a method for preparing a superabsorbent polymer. More particularly, provided is a method for preparing a superabsorbent polymer exhibiting remarkably reduced water-soluble components and generation of fine particles and exhibiting excellent absorption properties.
    Type: Application
    Filed: June 20, 2022
    Publication date: November 30, 2023
    Applicant: LG CHEM, LTD.
    Inventors: Heechang WOO, Gicheul KIM, Yoon Jae MIN, Jinuk CHOI
  • Publication number: 20230381788
    Abstract: The micronizing apparatus includes: a body having a transfer space where hydrogel is transferred, and a discharge space where ground hydrogel is discharged; a rotation shaft disposed in the transfer space, wherein at least one screw is formed on an outer perimeter surface of the first rotation shaft, to transfer the hydrogel along a longitudinal direction of the body; a rotor installed on the rotation shaft so as to rotate together with the rotation shaft, wherein a plurality of rotor blades and a plurality of rotor recesses are alternately formed along a circumferential direction on an outer perimeter part of the rotor; and a stator surrounding the rotor with an air gap between the rotor and the stator, which is a predetermined distance between an outside diameter of the rotor and an inside diameter of the stator, and is fixed to the body
    Type: Application
    Filed: June 20, 2022
    Publication date: November 30, 2023
    Applicant: LG CHEM, LTD.
    Inventors: Ui Seok CHUNG, Yoon Jae MIN, Gicheul KIM, Tae Yun KIM, Heechang WOO, Sangwon HAN
  • Publication number: 20230338925
    Abstract: A micronizing apparatus for hydrogel of super absorbent polymer includes: a body having a transfer space where hydrogel is transferred, and a discharge space where ground hydrogel is discharged; a first rotation shaft disposed in the transfer space, wherein at least one screw is formed on an outer perimeter surface of the first rotational shaft to transfer the hydrogel along a longitudinal direction of the body; a hole plate fixed to the body and having a plurality of through holes; and a second rotation shaft disposed in the discharge space, wherein a cutter is attached and spaced from the hole plate by a predetermined distance, to grind the hydrogel transferred by the screw, wherein a rotation speed of the first rotation shaft and a rotation speed of the second rotation shaft may be independently controlled.
    Type: Application
    Filed: June 20, 2022
    Publication date: October 26, 2023
    Applicant: LG CHEM, LTD.
    Inventors: Ui Seok CHUNG, Yoon Jae MIN, Gicheul KIM, Tae Yun KIM, Heechang WOO, Sangwon HAN
  • Patent number: 11648531
    Abstract: The method for preparing a super absorbent polymer according to the present disclosure reduces the generating amount of a fine powder while realizing the same particle size distribution in the process of pulverizing the dried polymer, thereby reducing the load of the fine powder reassembly, drying, pulverizing and classifying steps.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: May 16, 2023
    Inventors: Yoon Jae Min, Jong Hun Song, Gicheul Kim, Jae Yul Kim, Heechang Woo
  • Publication number: 20230124243
    Abstract: The present disclosure relates to a method for preparing a super absorbent polymer. More specifically, it relates to a method for preparing a super absorbent polymer capable of improving drying efficiency, reducing a generation amount of refines, and simultaneously improving absorption performance, in particular, absorbing under pressure and permeability of the finally prepared super absorbent polymer by controlling granulation strength of the extruded fine reassembly.
    Type: Application
    Filed: December 23, 2021
    Publication date: April 20, 2023
    Applicant: LG Chem, Ltd.
    Inventors: Sung Soo Park, Heechang Woo, Gicheul Kim
  • Publication number: 20220379521
    Abstract: A minute cutting apparatus for a superabsorbent polymer hydrogel using a pump is disclosed. An embodiment of the present invention provides the minute cutting apparatus, including: a barrel body in which a transfer space through which the hydrogel is transferred is formed; a pumping unit installed in the barrel body to supply a pressing force to the transfer space, a rotation shaft rotatably installed in the transfer space of the barrel body; a driving motor configured to provide a rotational driving force to rotation shaft; a cutter member installed on the rotation shaft to pulverize the hydrogel transferred by the pressing force in the transfer space; and a perforated plate installed in the barrel body to discharge the hydrogel pulverized by the cutter member to an outside of the barrel body.
    Type: Application
    Filed: October 16, 2020
    Publication date: December 1, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Heechang WOO, Yoon Jae MIN, Gicheul KIM
  • Publication number: 20220339811
    Abstract: A superabsorbent polymer hydrogel chopping device is provided. The superabsorbent polymer hydrogel chopping device includes a barrel body having a transfer space to which a hydrogel is transferred therein and a discharge portion through which the hydrogel is discharged is formed to face in a ground direction, a transfer unit installed in the barrel body and configured to transfer the hydrogel in the transfer space, a cutter member installed in the barrel body and configured to pulverize the hydrogel transferred by the transfer unit, and a perforated plate configured to discharge particles of the hydrogel pulverized by the cutter member to the outside of the barrel body.
    Type: Application
    Filed: February 18, 2021
    Publication date: October 27, 2022
    Applicant: LG CHEM, LTD.
    Inventor: Heechang WOO
  • Publication number: 20220258380
    Abstract: A complex minute cutting apparatus for a superabsorbent hydrogel is disclosed. The complex minute cutting apparatus includes: a barrel body in which a transfer space through which a hydrogel is transferred is formed and a discharge part is formed at a side surface thereof; a transfer unit installed in the barrel body to transfer the hydrogel in the transfer space; and a plurality of cutting modules installed in the transfer unit to pulverize the hydrogel and discharging it to an outside of the discharge unit in a cut state.
    Type: Application
    Filed: November 19, 2020
    Publication date: August 18, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Jinuk CHOI, Heechang WOO, Gicheul KIM, Yoon Jae MIN
  • Publication number: 20220203375
    Abstract: Disclosed is a hydrogel shredding device. The hydrogel shredding device includes: a first barrel body in which a first transfer space for transferring a hydrogel is formed, and extending in a first direction; a first transfer unit installed in the first barrel body and transferring the hydrogel in the first transfer space; a second barrel body installed on a lateral side of the first barrel body, and in which a second transfer space connected to the first transfer space extends in a second direction traversing the first direction; a second transfer unit installed in the second barrel body and transferring the hydrogel in the second transfer space; a cutter member installed in the second barrel body and pulverizing the hydrogel transferred by the second transfer unit; and a porous plate for discharging the hydrogel particles pulverized by the cutter member to an outside of the second barrel body.
    Type: Application
    Filed: May 12, 2020
    Publication date: June 30, 2022
    Applicant: LG Chem, Ltd.
    Inventor: Heechang Woo
  • Publication number: 20220193634
    Abstract: The present disclosure relates to a preparation method of a super absorbent polymer composition. More specifically, it relates to a preparation method of a super absorbent polymer composition capable of pulverizing the hydrogel polymer to a normal particle size without agglomeration between particles by adding an additive having a specific structure, and significantly reducing the amount of fine powder generated during the process.
    Type: Application
    Filed: December 18, 2020
    Publication date: June 23, 2022
    Applicant: LG CHEM, LTD.
    Inventors: Yoon Jae MIN, Gicheul KIM, Ki Hyun KIM, Sung Soo PARK, Jinuk CHOI, Tae Yun KIM, Heechang WOO
  • Publication number: 20210146336
    Abstract: The method for preparing a super absorbent polymer according to the present disclosure has a feature that it is possible to reduce the generation of a fine powder during production of the super absorbent polymer while maintaining excellent physical properties of the super absorbent polymer, including centrifuge retention capacity (CRC) and vortex removal time.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 20, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Jaeyul Kim, Jong Hun Song, Gicheul Kim, Yoon Jae Min, Ki Hyun Kim, Seul Ah Lee, In Yong Jeong, Heechang Woo
  • Publication number: 20200406228
    Abstract: The method for preparing a super absorbent polymer according to the present disclosure reduces the generating amount of a fine powder while realizing the same particle size distribution in the process of pulverizing the dried polymer, thereby reducing the load of the fine powder reassembly, drying, pulverizing and classifying steps.
    Type: Application
    Filed: August 16, 2019
    Publication date: December 31, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Yoon Jae Min, Jong Hun Song, Gicheul Kim, Jae Yul Kim, Heechang Woo