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公开(公告)号：US20190194847A1
公开(公告)日：2019-06-27
申请号：US16308251
申请日：2017-06-06
Applicant: Ascend Performance Materials Operations LLC
Inventor： Harrie P. Schoots , Wai-Shing Yung , Scott E. Osborn , Craig A. Trask
CPC classification number: D04H3/16 , B01D39/1623 , B01D46/546 , B01D2239/0208 , B01D2239/0618 , B01D2239/10 , B01D2239/1233 , B01D2239/1258 , D04H1/4334 , D04H1/56 , D04H1/732 , D04H3/009 , D04H3/03 , D06M11/00 , D10B2501/00 , D10B2505/04
Abstract: A polymer, applications thereof, and method of making a nanofiber nonwoven product is disclosed which includes: providing a spinnable polyamide polymer composition comprising a solution of a polyamide in a suitable solvent, wherein the polyamide has a Relative Viscosity of from 30-300; a basis weight greater than 1 gm/m2, solution-spinning the polyamide polymer composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron (1000 nanometers); and forming the nanofibers into said nonwoven product which thereby has an average nanofiber diameter of less than 1 micron (1000 nanometers). Preferably, the nonwoven product is solution-spun from a process selected from (i) centrifugal spinning using a rotating spinneret or (ii) 2-phase propellant-gas spinning including extruding the polyamide polymer composition in liquid form with pressurized gas through a fiber-forming channel. Suitable solvents include formic acid, sulfuric acid, trifluoroacetic acid, hexafluoroisopropanol (HFIP) and phenols including m-cresol.
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公开(公告)号：US11618238B2
公开(公告)日：2023-04-04
申请号：US16845887
申请日：2020-04-10
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Albert E. Ortega , Joseph L. Menner , Vikram Gopal
Abstract: Nonwoven multilayer structures having at least two nanofiber layers are described herein. The nonwoven multilayer structure may have two nanofibers layers that have different properties from each other, such as fiber diameter. One nanofiber layer may be produced by an electrospinning process, while another nanofiber layer may be produced by a melt blown process.
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公开(公告)号：US10662561B2
公开(公告)日：2020-05-26
申请号：US16003528
申请日：2018-06-08
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Scott E. Osborn , Chris E. Schwier , Vikram Gopal , Albert Ortega
IPC: D04H1/4334 , D04H3/016 , D04H1/56 , D04H1/4382 , D04H3/16 , D04H1/552 , B82Y40/00
Abstract: A nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.
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公开(公告)号：US11965275B2
公开(公告)日：2024-04-23
申请号：US17388544
申请日：2021-07-29
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Chris Schwier , Albert Ortega , Scott E. Osborn
CPC classification number: D04H3/16 , D01D5/096 , D04H3/009 , B29C2948/92514 , B29C2948/92704 , B29C2948/92723 , D01D5/0985 , D10B2331/02
Abstract: A method for tuning characteristics of a polyamide nanofiber nonwoven comprising the step of targeting a specific average nanofiber diameter and/or a specific relative viscosity for the polyamide nanofiber nonwoven. The specific average nanofiber diameter is within a range from 100 nm to 1000 nm and/or the specific relative viscosity is within a range from 5 to 75, e.g., from 15 to 50. The process further comprises the steps of extruding a polyamide composition having a moisture content with a pressurized gas through a fiber forming channel having a channel temperature to form the polyamide nanofiber nonwoven having the target average nanofiber diameter and/or relative viscosity and controlling the moisture content, the pressure of pressurized gas, and/or the channel temperature based on the specific average nanofiber diameter and/or the specific relative viscosity.
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公开(公告)号：US11505701B2
公开(公告)日：2022-11-22
申请号：US16509896
申请日：2019-07-12
Applicant: ASCEND PERFORMANCE MATERIALS OPERATIONS LLC
Inventor： Scott E. Osborn , Wai-Shing Yung
Abstract: The present disclosure relates to polymer resins, fibers, and yarns with permanent antimicrobial activity, and a method of producing the same. In one embodiment, the antimicrobial polymer resin comprises a polymer having less than 2500 ppm of zinc dispersed within the polymer, less than 1000 ppm of phosphorus, wherein the weight ratio of zinc to phosphorus is at least 1.3:1 or less than 0.64:1.
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Patent Agency Ranking
公开(公告)号：US20200254371A1
公开(公告)日：2020-08-13
申请号：US16864769
申请日：2020-05-01
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Scott E. Osborn , Chris E. Schwier , Vikram Gopal , Albert Ortega , Joseph L. Menner
Abstract: A filter comprising a nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.
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公开(公告)号：US11376534B2
公开(公告)日：2022-07-05
申请号：US16864769
申请日：2020-05-01
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Scott E. Osborn , Chris E. Schwier , Vikram Gopal , Albert Ortega , Joseph L. Menner
Abstract: A filter comprising a nanofiber nonwoven product is disclosed which comprises a polyamide with a relative viscosity from 2 to 330, spun into nanofibers with an average diameter of less than 1000 nanometers (1 micron). In general, the inventive products are prepared by: (a) providing a polyamide composition, wherein the polyamide has a relative viscosity from 2 to 330; (b) melt spinning the polyamide composition into a plurality of nanofibers having an average fiber diameter of less than 1 micron, followed by (c) forming the nanofibers into the product.
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公开(公告)号：US20220134968A1
公开(公告)日：2022-05-05
申请号：US17515182
申请日：2021-10-29
Applicant: Ascend Performance Materials Operations LLC
Inventor： Albert Ortega , Wai-Shing Yung , Joseph L. Menner
IPC: B60R13/08 , B32B5/02 , B32B15/14 , G10K11/168
Abstract: A sound absorbing multi-layer composite for a vehicle that reduces sounds along an acoustic path is configured with a non-foam polymeric layer and a face layer for dissipating sound energy. Also, the face layer may be made of a nonwoven polymer comprising at least 60% of a polyamide containing an aliphatic diamine having 6 or more carbon atoms and an aliphatic diacid having 6 or more carbon atoms. The weighted overall average fiber diameter of the composite is from 2 microns to 25 microns.
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公开(公告)号：US20210355617A1
公开(公告)日：2021-11-18
申请号：US17388544
申请日：2021-07-29
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Chris Schwier , Albert Ortega , Scott E. Osborn
Abstract: A method for tuning characteristics of a polyamide nanofiber nonwoven comprising the step of targeting a specific average nanofiber diameter and/or a specific relative viscosity for the polyamide nanofiber nonwoven. The specific average nanofiber diameter is within a range from 100 nm to 1000 nm and/or the specific relative viscosity is within a range from 5 to 75, e.g., from 15 to 50. The process further comprises the steps of extruding a polyamide composition having a moisture content with a pressurized gas through a fiber forming channel having a channel temperature to form the polyamide nanofiber nonwoven having the target average nanofiber diameter and/or relative viscosity and controlling the moisture content, the pressure of pressurized gas, and/or the channel temperature based on the specific average nanofiber diameter and/or the specific relative viscosity.
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公开(公告)号：US11111614B2
公开(公告)日：2021-09-07
申请号：US16434918
申请日：2019-06-07
Applicant: Ascend Performance Materials Operations LLC
Inventor： Wai-Shing Yung , Chris Schwier , Albert Ortega , Scott E. Osborn
Abstract: A method for tuning characteristics of a polyamide nanofiber nonwoven comprising the step of targeting a specific average nanofiber diameter and/or a specific relative viscosity for the polyamide nanofiber nonwoven. The specific average nanofiber diameter is within a range from 100 nm to 1000 nm and/or the specific relative viscosity is within a range from 5 to 75, e.g., from 15 to 50. The process further comprises the steps of extruding a polyamide composition having a moisture content with a pressurized gas through a fiber forming channel having a channel temperature to form the polyamide nanofiber nonwoven having the target average nanofiber diameter and/or relative viscosity and controlling the moisture content, the pressure of pressurized gas, and/or the channel temperature based on the specific average nanofiber diameter and/or the specific relative viscosity.
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