Patents by Inventor Sachin Talwar

Sachin Talwar 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: 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
  • 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: 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: 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
  • Patent number: 11105018
    Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: August 31, 2021
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
  • Publication number: 20210095405
    Abstract: Dimensionally-stable fibrous structures including ceramic-coated melt-blown nonwoven fibers made of a flame-retarding polymer and processes for producing such 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, e.g. UL 94 V0, FAR 25.853 (a), FAR 25.856 (a), and CA Title 19, without any halogenated flame-retardant additive, and have a ceramic coating. 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 14, 2018
    Publication date: April 1, 2021
    Inventors: Liyun L. Ren, Pingfan Wu, Daniel J. Zillig, Sachin Talwar, Jonathan H. Alexander, Ta-Hua Yu, Moses M. David, James A. Phipps
  • 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
  • Patent number: 10619275
    Abstract: A thermally stable nonwoven web including blended-polymer meltblown fibers containing a blend of poly (butylene terephthalate) and poly (ethylene terephthalate).
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: April 14, 2020
    Assignee: 3M Innovative Properties Company
    Inventors: Rui Chen, Xiaoshuan Fu, Jin Zhang You, Chiaki Hanamaki, Sachin Talwar
  • 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
  • Publication number: 20190338447
    Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.
    Type: Application
    Filed: July 17, 2019
    Publication date: November 7, 2019
    Inventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
  • Patent number: 10400354
    Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: September 3, 2019
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
  • Patent number: 10273612
    Abstract: Spunbonded electret webs comprising polylactic acid fibers, in which at least some of the polylactic acid fibers are meltspun, drawn, charged fibers that include charging additive; and, methods of making such fibers and webs.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: April 30, 2019
    Assignee: 3M Innovative Properties Company
    Inventors: Liming Song, Sachin Talwar, John D. Stelter, John M. Sebastian, Nathan E. Schultz, Eric M. Moore, Fuming B. Li, Andrew R. Fox, Michael R. Berrigan, Zackary J. Becker
  • Publication number: 20170241054
    Abstract: Spunbonded electret webs comprising polylactic acid fibers, in which at least some of the polylactic acid fibers are meltspun, drawn, charged fibers that include charging additive; and, methods of making such fibers and webs.
    Type: Application
    Filed: August 25, 2015
    Publication date: August 24, 2017
    Inventors: Liming Song, Sachin Talwar, John D. Stelter, John M. Sebastian, Nathan E. Schultz, Eric M. Moore, Fuming B. Li, Andrew R. Fox, Michael R. Berrigan, Zackary J. Becker
  • Publication number: 20170191197
    Abstract: A thermally stable meltblown fibrous web, including a plurality of meltblown multilayer fibers, in which at least some of the meltblown multilayer fibers each include at least one primary layer that includes a primary polymer that is slow-crystallizing with a Tm of at least about 200° C., and at least one secondary layer that includes a secondary polymer that is fast-crystallizing with a Tm of at least about 200° C.
    Type: Application
    Filed: June 11, 2015
    Publication date: July 6, 2017
    Inventors: Sachin TALWAR, Torrence B. STAHL, Eugene G. JOSEPH
  • Publication number: 20170130379
    Abstract: A thermally stable nonwoven web including blended-polymer meltblown fibers containing a blend of poly (butylene terephthalate) and poly (ethylene terephthalate).
    Type: Application
    Filed: June 26, 2014
    Publication date: May 11, 2017
    Inventors: Rui Chen, Xiaoshuan Fu, Jin Zhang You, Chiaki Hanamaki, Sachin Talwar
  • Publication number: 20160341119
    Abstract: A melt blowing process comprising: (a) providing a thermoplastic polymer material that includes at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; and (b) melt blowing the thermoplastic polymer material into at least one fiber or a plurality of fibers, with each fiber having a diameter or thickness that is less than about 10 microns. The metal phosphinate is in an amount that (a) reduces the viscosity of the polyester polymer and (b) functions as a crystallizing agent, which at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber. Non-woven and woven fibrous structures can be made using fibers made from this process.
    Type: Application
    Filed: August 3, 2016
    Publication date: November 24, 2016
    Inventors: Nataliya V. Fedorova, Eric M. Moore, Sehyun Nam, Pamela A. Percha, Sachin Talwar
  • Publication number: 20160298266
    Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.
    Type: Application
    Filed: November 19, 2014
    Publication date: October 13, 2016
    Applicant: 3M Innovative Properties Company
    Inventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan