Patents by Inventor Kyung-Seop Noh

Kyung-Seop Noh 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).

  • Publication number: 20240101732
    Abstract: In the present disclosure, there are provided a polypropylene resin composition including an ethylene propylene copolymer, and a method of preparing the same. In particular, the polypropylene resin composition of the present disclosure may be prepared by using a continuous reactor in the presence of a metallocene compound having a specific structure. The polypropylene resin composition of the present disclosure can exhibit high transparency together with excellent elongation by optimizing the xylene soluble, the content of ethylene, and the melt index, together with a narrow molecular weight distribution.
    Type: Application
    Filed: March 25, 2022
    Publication date: March 28, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Kyung Seop Noh, Heekwang Park, Seong Min Chae, Jihwa Ye
  • Patent number: 11913935
    Abstract: The present invention relates to polypropylene non-woven fabric having excellent loft property, a method for preparing polypropylene non-woven fabric having excellent loft property, and a method for evaluating the properties of the polypropylene resin.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: February 27, 2024
    Assignee: LG Chem, Ltd.
    Inventors: Hyunsup Lee, Seong Min Chae, Kyung Seop Noh, Heekwang Park, Ki Soo Lee, Sangjin Jeon, Myunghan Lee
  • Publication number: 20240052074
    Abstract: In the present disclosure, there are provided a polypropylene resin composition including an ethylene propylene copolymer, and a nonwoven fabric produced therefrom. In particular, the polypropylene resin composition of the present disclosure may be prepared by using a continuous reactor in the presence of a metallocene compound having a specific structure. The polypropylene resin composition of the present disclosure can maintain high strength together with excellent processability. Thus, the polypropylene resin composition of the present disclosure can produce a soft nonwoven fabric, as compared to the existing products, by optimizing xylene soluble, the content of ethylene, a melt index, a crystallization temperature, a tensile strength and a flexural modulus, together with the narrow molecular weight distribution.
    Type: Application
    Filed: March 25, 2022
    Publication date: February 15, 2024
    Applicant: LG Chem, Ltd.
    Inventors: Kyung Seop Noh, Heekwang Park, Seong Min Chae, Jihwa Ye
  • Patent number: 11885044
    Abstract: The polypropylene nonwoven fabric produced by the method for producing a polypropylene nonwoven fabric according to the present invention has features that it has excellent stretchability and excellent water pressure resistance.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: January 30, 2024
    Inventors: Kyung Seop Noh, Seong Min Chae, Churl Young Park, Sangjin Jeon, Taejin Kim
  • Patent number: 11759977
    Abstract: The present invention provides a polypropylene resin pellet that is environment friendly, has excellent workability, and enables preparation of fine denier fiber, and a method for preparing the same.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: September 19, 2023
    Inventors: Heekwang Park, Hye Kyung Lee, Ha Na Park, Kyung Seop Noh, Hyunsup Lee, Seong Min Chae, Heon Yong Kwon, Sangjin Jeon, Seok Hwan Kim
  • Publication number: 20230257494
    Abstract: According to this invention, there are provided powder type polypropylene resin wherein flowability in a hooper and feeding stability in the feeding zone of an extruder are improved through morphology optimization such as decrease in fine powder content, narrow particle size distribution, increase in average particle size, and high melting point, and the like, and a method for preparing the same.
    Type: Application
    Filed: September 8, 2021
    Publication date: August 17, 2023
    Applicant: LG CHEM, LTD.
    Inventors: Seong Min CHAE, Jihwa YE, Kyung Seop NOH, Heekwang PARK
  • Patent number: 11414537
    Abstract: The present invention provides a resin composition for core-sheath type bi-component fiber that not only maintains excellent softness, but also improves tensile strength, when preparing non-woven fabric, particularly spunbond non-woven fabric.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: August 16, 2022
    Inventors: Seong Min Chae, Jihwa Ye, Kyung Seop Noh, Heekwang Park, Taejin Kim, Daeyeon Lee
  • Patent number: 11384180
    Abstract: The present invention provides a homopolypropylene having high strength and a low content of low molecular weights together with excellent processability, and a preparation method thereof.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: July 12, 2022
    Inventors: Taejin Kim, Seong Min Chae, Kyung Seop Noh, Sang Jin Jeon, In Yong Jung
  • Patent number: 11384227
    Abstract: The present invention provides a resin composition for core-sheath type bi-component fiber that not only maintains excellent softness, but also improves tensile strength, when preparing non-woven fabric, particularly spunbond non-woven fabric.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: July 12, 2022
    Inventors: Seong Min Chae, Jihwa Ye, Kyung Seop Noh, Heekwang Park, Taejin Kim, Daeyeon Lee
  • Patent number: 11345767
    Abstract: A propylene copolymer resin composition capable of improving softness while maintaining excellent strength properties when preparing nonwoven fabrics, and a method for preparing the same are provided. The propylene copolymer resin composition includes a propylene-ethylene copolymer having an ethylene content of 12 to 18 wt % in the propylene-ethylene copolymer and a propylene-1-butene random copolymer satisfying the following conditions (i) to (iv), wherein (i) 1-butene content of 1 to 5 wt % in the propylene-1-butene random copolymer, (ii) molecular weight distribution of 2.4 or less, (iii) storage modulus of 1200 MPa or less at 25° C., and (iv) phase angle of 5.5° to 8° at a glass transition temperature, and wherein a weight ratio of the propylene-1-butene random copolymer to the propylene-ethylene copolymer is 80:20 to 99:1.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: May 31, 2022
    Inventors: Heekwang Park, Seong Min Chae, Kyung Seop Noh, Sangjin Jeon, Hyunsup Lee, Jihwa Ye
  • Patent number: 11339234
    Abstract: Provided is a propylene random copolymer having excellent processability. The propylene random copolymer according to the present invention may exhibit high stiffness and flexural modulus together with a low shrinkage ratio, thereby being usefully applied to articles for thin wall injection molding.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 24, 2022
    Inventors: Jihwa Ye, Taejin Kim, Kyung Seop Noh, Heekwang Park, Seong Min Chae, Daeyeon Lee
  • Publication number: 20220135715
    Abstract: The present disclosure relates to a polypropylene resin exhibiting excellent processability and capable of producing fine fibers, a polypropylene fiber including the same, and a method for preparing the same.
    Type: Application
    Filed: December 4, 2020
    Publication date: May 5, 2022
    Applicant: LG Chem, Ltd.
    Inventors: Seong Min Chae, Hyunsup Lee, Kyung Seop Noh, Heekwang Park, Jihwa Ye
  • Publication number: 20210388178
    Abstract: There are provided a pellet type polypropylene resin composition that exhibits excellent heat resistance and oxidation stability, and exhibits high flow without using a decomposition accelerator, and thus, can be used to prepare fine denier fiber, and a method for preparing the same.
    Type: Application
    Filed: September 25, 2020
    Publication date: December 16, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Kyung Seop NOH, Heekwang PARK, Seong Min CHAE, Jihwa YE
  • Patent number: 11198779
    Abstract: The present invention relates to a propylene-butene copolymer resin composition used for non-woven fabric, a method of preparing the same, and spunbond non-woven fabric manufactured using the composition, and particularly, by optimizing a content of 1-buttene in a metallocene polypropylene resin composition to 0.5 to 5.0 wt %, while simultaneously optimizing both of a melt index and a residual stress ratio of the resin composition, has a merit of having a reduced modulus together with a high conversion rate to manufacture non-woven fabric which is softer than existing products while maintaining high strength.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: December 14, 2021
    Inventors: Hee Kwang Park, Kyung Seop Noh, Sang Jin Jeon, Hyunsup Lee, In Sun Lee, Jin Hyun Park, Changkwon Chung
  • Patent number: 11111323
    Abstract: The present invention relates to homopolypropylene resin for non-woven fabric, and according to the present invention, by optimizing tacticity to 80% to 90%, having narrow molecular weight distribution of 2.4 or less, and fulfilling melt index of 20 g/10 min to 30 g/10 min, melting point of 145° C. or less, and residual stress rate of 0.05% or less, thereby optimizing modulus, high strength non-woven fabric that is softer than the existing products, and is not easily torn due to high tenacity, can be prepared.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: September 7, 2021
    Inventors: Hee Kwang Park, Byung Seok Kim, Kyung Seop Noh, Sang Jin Jeon, Seong Min Chae
  • Publication number: 20210215661
    Abstract: The present invention relates to polypropylene non-woven fabric having excellent loft property, a method for preparing polypropylene non-woven fabric having excellent loft property, and a method for evaluating the properties of the polypropylene resin.
    Type: Application
    Filed: June 21, 2019
    Publication date: July 15, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Hyunsup Lee, Seong Min Chae, Kyung Seop Noh, Heekwang Park, Ki Soo Lee, Sangjin Jeon, Myunghan Lee
  • Publication number: 20210078205
    Abstract: The present invention provides a polypropylene resin pellet that is environment friendly, has excellent workability, and enables preparation of fine denier fiber, and a method for preparing the same.
    Type: Application
    Filed: November 4, 2019
    Publication date: March 18, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Heekwang Park, Hye Kyung Lee, Ha Na Park, Kyung Seop Noh, Hyunsup Lee, Seong Min Chae, Heon Yong Kwon, Sangjin Jeon, Seok Hwan Kim
  • Publication number: 20210061931
    Abstract: A propylene copolymer resin composition capable of improving softness while maintaining excellent strength properties when preparing nonwoven fabrics, and a method for preparing the same are provided. The propylene copolymer resin composition includes a propylene-ethylene copolymer having an ethylene content of 12 to 18 wt % in the propylene-ethylene copolymer and a propylene-1-butene random copolymer satisfying the following conditions (i) to (iv), wherein (i) 1-butene content of 1 to 5 wt % in the propylene-1-butene random copolymer, (ii) molecular weight distribution of 2.4 or less, (iii) storage modulus of 1200 MPa or less at 25° C., and (iv) phase angle of 5.5° to 8° at a glass transition temperature, and wherein a weight ratio of the propylene-1-butene random copolymer to the propylene-ethylene copolymer is 80:20 to 99:1.
    Type: Application
    Filed: October 28, 2019
    Publication date: March 4, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Heekwang Park, Seong Min Chae, Kyung Seop Noh, Sangjin Jeon, Hyunsup Lee, Jihwa Ye
  • Publication number: 20210040294
    Abstract: The present invention provides a resin composition for core-sheath type bi-component fiber that not only maintains excellent softness, but also improves tensile strength, when preparing non-woven fabric, particularly spunbond non-woven fabric.
    Type: Application
    Filed: November 4, 2019
    Publication date: February 11, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Seong Min Chae, Jihwa Ye, Kyung Seop Noh, Heekwang Park, Taejin Kim, Daeyeon Lee
  • Patent number: 10906998
    Abstract: The polypropylene copolymer according to the present invention has a low melting point and also is excellent in the low temperature heat sealing effect, transparency and strength, and the film prepared therefrom can be effectively used as a sealing layer of the non-stretched polypropylene-based film.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: February 2, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Kyung Seop Noh, Ji Ho Choi, Churl Young Park, Ki Soo Lee, Sang Jin Jeon, Hee Kwang Park, Won-Sang Lee, Ah Young Seo