Patents by Inventor Liyun Ren

Liyun Ren 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: 20250065253
    Abstract: The present invention is an electrospun web including a carrier substrate and an electrostatically charged nanofiber. The electrospun web has a pressure drop of about 5 mmH2O or less, a percent penetration of about 50% or less, and a clarity of about 80% or more.
    Type: Application
    Filed: January 7, 2022
    Publication date: February 27, 2025
    Inventors: GuangMing Gong, Liyun Ren
  • Patent number: 12146248
    Abstract: Provided are non-woven fibrous webs, methods and assemblies thereof. The non-woven fibrous web comprises a plurality of melt-blown fibers. The plurality of melt-blown fibers include a thermoplastic polymer blended with a phosphinate and/or polymeric phosphonate. The provided non-woven articles can afford a fine fiber diameter for enhanced acoustic insulation properties, dimensional stability, and superior flame-retardant properties when compared with conventional non-woven articles having similar fiber diameters.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: November 19, 2024
    Assignee: 3M Innovative Properties Company
    Inventors: Liyun Ren, Daniel J. Zillig, Sachin Talwar, Eumi Pyun, Jeffrey A. Chambers, Nurkan Turkdogru Gurun, Pingfan Wu, Tien T. Wu
  • Patent number: 12125464
    Abstract: An assembly includes an enclosure including first and second regions spaced apart along a first direction, and a plurality of spaced apart acoustic baffles arranged along a second direction different from the first direction and disposed in the enclosure between the first and second regions. The plurality of spaced apart acoustic baffles includes adjacent first and second acoustic baffles. Each of the first and second acoustic baffles include an acoustically absorptive layer disposed on a sheet having a specific airflow resistance greater than 200 MKS Rayl. The first and second acoustic baffles define a channel therebetween. At least a portion of the channel extends along a longitudinal direction making an oblique angle with the first direction.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: October 22, 2024
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ronald W. Gerdes, Catherine A. Leatherdale, Thomas Herdtle, Paul A. Nielsen, Timothy J. Rowell, Liyun Ren, Daniel J. Zillig, Sachin Talwar, Eumi Pyun, Jeffrey A. Chambers, Pingfan Wu
  • Publication number: 20240269494
    Abstract: Provided are face coverings that include a cover panel made from a cover panel material, a filter made from a filtration media adjacent the cover panel, and a retaining system for securing the face covering to a wearer's face. The face coverings can further include a gasket comprising gasket material connected to a perimeter of the cover panel and configured to contact to a wearer's face. The pressure drop across a combination of the cover panel material and the filtration media is from 45% to 75% of the pressure drop across the gasket material, enabling filtration of airborne contaminants allowing for reduced retaining tension and improved comfort to the wearer.
    Type: Application
    Filed: August 15, 2022
    Publication date: August 15, 2024
    Inventors: Nicholas K. Lee, Liyun Ren, Tanya L. Beckwith, Gina M. Daveloose, Jeffrey G. Linert, Jacob T. Lusson, John D. Stelter, Jacob J. Thelen
  • Patent number: 12012680
    Abstract: The provided articles, assemblies, and methods use a non-woven fibrous web (50) having one or more layers (60) that are densified in situ to provide a layer that is densified relative to one or more adjacent layers, collectively within a unitary non-woven construction. The non-woven web (50) can be made from fibers having a composition and/or structure that resist shrinkage induced by polymer crystallization when subjected to high temperatures. Advantageously, the provided non-woven webs (50) can be molded to form a three-dimensional shaped article that displays dimensional stability.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: June 18, 2024
    Assignee: 3M Innovative Properties Company
    Inventors: Jinzhang You, Jonathan H. Alexander, Michael R. Berrigan, Akira Ito, Xiaojun Su, Qinrong Wu, Liyun Ren, Thomas P. Hanschen, Daniel J. Zillig, Sachin Talwar
  • Publication number: 20220396903
    Abstract: A nonwoven fibrous web and a method of making thereof. The nonwoven fibrous web includes greater than 0% but no greater than 30 wt % of a plurality of melt-blown fibers comprised of a crystalline (co)polymer; and at least 70 wt % of a plurality of randomly-oriented staple fibers, the plurality of randomly-oriented staple fibers including: at least 60 wt % of oxidized polyacrylonitrile fibers; and from 0 to 40 wt % of reinforcing fibers having an outer surface comprised of a (co)polymer with a melting temperature of from 100° C. to 350° C.; wherein the plurality of melt-blown fibers and the plurality of randomly-oriented staple fibers are bonded together to form a cohesive non-woven fibrous web.
    Type: Application
    Filed: October 7, 2019
    Publication date: December 15, 2022
    Inventors: Tien T. Wu, Pingfan Wu, Liyun Ren
  • Publication number: 20220366887
    Abstract: An assembly includes an enclosure including first and second regions spaced apart along a first direction, and a plurality of spaced apart acoustic baffles arranged along a second direction different from the first direction and disposed in the enclosure between the first and second regions. The plurality of spaced apart acoustic baffles includes adjacent first and second acoustic baffles. Each of the first and second acoustic baffles include an acoustically absorptive layer disposed on a sheet having a specific airflow resistance greater than 200 MKS Rayl. The first and second acoustic baffles define a channel therebetween. At least a portion of the channel extends along a longitudinal direction making an oblique angle with the first direction.
    Type: Application
    Filed: August 28, 2020
    Publication date: November 17, 2022
    Inventors: Ronald W. Gerdes, Catherine A. Leatherdale, Thomas Herdtle, Paul A. Nielsen, Timothy J. Rowell, Liyun Ren, Daniel J. Zillig, Sachin Talwar, Eumi Pyun, Jeffrey A. Chambers, Pingfan Wu
  • Publication number: 20220136140
    Abstract: The present invention is a process for converting a multilayer film to a plurality of nano-ribbons. The process includes co-extruding a first film and a second film to form the multilayer film, slitting the multilayer film to form a plurality of multilayer ribbons, and separating the multilayer ribbons to form a plurality of nano-ribbons having substantially flat cross-sections.
    Type: Application
    Filed: February 26, 2020
    Publication date: May 5, 2022
    Inventors: Kristy A. Jost, Liyun Ren, Rongzhi Huang, William J. Kopecky, James M. Jonza, Andrew J. Ouderkirk
  • Publication number: 20210292947
    Abstract: Provided are non-woven fibrous webs, methods and assemblies thereof. The non-woven fibrous web comprises a plurality of melt-blown fibers. The plurality of melt-blown fibers include a thermoplastic polymer blended with a phosphinate and/or polymeric phosphonate. The provided non-woven articles can afford a fine fiber diameter for enhanced acoustic insulation properties, dimensional stability, and superior flame-retardant properties when compared with conventional non-woven articles having similar fiber diameters.
    Type: Application
    Filed: October 15, 2019
    Publication date: September 23, 2021
    Inventors: Liyun Ren, Daniel J. Zillig, Sachin Talwar, Eumi Pyun, Jeffrey A. Chambers, Nurkan Turkdogru Gurun, Pingfan Wu, Tien T. Wu
  • Publication number: 20210156060
    Abstract: A scrim is described comprising a plurality of fibers and a coating disposed on the scrim wherein the coating comprises a binder and a flame retardant additive. The scrim has a basis weight less than or equal to 200 grams/m2 and passes the UL94-V0 flammability standard. The scrim may be incorporated into other articles and methods. Also described is a flame retardant coating composition.
    Type: Application
    Filed: July 27, 2019
    Publication date: May 27, 2021
    Inventors: Eumi Pyun, Liyun Ren, Pingfan Wu
  • Publication number: 20200299877
    Abstract: The provided articles, assemblies, and methods use a non-woven fibrous web (50) having one or more layers (60) that are densified in situ to provide a layer that is densified relative to one or more adjacent layers, collectively within a unitary non-woven construction. The non-woven web (50) can be made from fibers having a composition and/or structure that resist shrinkage induced by polymer crystallization when subjected to high temperatures. Advantageously, the provided non-woven webs (50) can be molded to form a three-dimensional shaped article that displays dimensional stability.
    Type: Application
    Filed: September 15, 2017
    Publication date: September 24, 2020
    Inventors: Jinzhang YOU, Jonathan H. ALEXANDER, Michael R. BERRIGAN, Akira ITO, Xiaojun SU, Qinrong WU, Liyun REN, Thomas P. HANSCHEN, Daniel J. ZILLIG, Sachin TALWAR
  • Publication number: 20200208314
    Abstract: Nonwoven webs including one or more semi-continuous filaments made of a mixture including from about 50% w/w to about 99% w/w of at least one crystalline polyolefin (co)polymer, and from about 1% w/w to about 40% w/w of at least one hydrocarbon tackifier resin. The at least one semi-continuous filament exhibits molecular orientation, and at least one of the crystalline polyolefin (co)polymer or the nonwoven web exhibits a Heat of Fusion measured using Differential Scanning Calorimetry of greater than 50 Joules/g. A process for making the semi-continuous filaments and nonwoven webs is also disclosed.
    Type: Application
    Filed: July 30, 2018
    Publication date: July 2, 2020
    Inventors: Eugene G. Joseph, Saurabh Batra, Michael R. Berrigan, John D. Stelter, Jacob J. Thelen, Zackary J. Becker, Liyun Ren, Sachin Talwar, Michael D. Romano
  • Publication number: 20200115833
    Abstract: Nonwoven fibrous webs including a multiplicity of (co)polymeric fibers made of a mixture including from about 50% w/w to about 99% w/w of at least one crystalline polyolefin (co)polymer, and from about 1% w/w to about 40% w/w of at least one hydrocarbon tackifier resin. A process for making the nonwoven fibrous webs includes heating the foregoing mixture to at least a Melting Temperature of the mixture to form a molten mixture, extruding this molten mixture through at least one orifice to form at least one filament, applying a gaseous stream to attenuate the at least one filament to form a plurality of discrete, discontinuous fibers, and cooling the plurality of discrete, discontinuous fibers to a temperature below the Melting Temperature and collecting the discrete discontinuous fibers as a nonwoven fibrous web. The nonwoven fibrous webs exhibit a Heat of Fusion measured using Differential Scanning Calorimetry of greater than 50 Joules/g.
    Type: Application
    Filed: July 30, 2018
    Publication date: April 16, 2020
    Inventors: Eugene G. Joseph, Saurabh Batra, Liyun Ren, Sachin Talwar, Michael D. Romano, Michael R. Berrigan
  • Publication number: 20200071865
    Abstract: Dimensionally stable fire-resistant fibrous structures including fire-resistant melt-blown nonwoven fibers, and processes and apparatus for producing such dimensionally stable, fire-resistant nonwoven fibrous structures. The melt-blown fibers include poly(phenylene sulfide) in an amount sufficient for the nonwoven fibrous structures to pass one or more fire-resistance test selected from UL 94 V0, FAR 25.853 (a), and FAR 25.856 (a), without any halogenated flame-retardant additive in the nonwoven fibrous structure. The melt-blown fibers are subjected to a controlled in-flight heat treatment at a temperature below a melting temperature of the poly(phenylene sulfide) immediately upon exiting from at least one orifice of a melt-blowing die, in order to impart dimensional stability to the fibers.
    Type: Application
    Filed: December 29, 2017
    Publication date: March 5, 2020
    Inventors: Liyun Ren, Pingfan Wu, Daniel J. Zillig, Sachin Talwar, Jonathan H. Alexander