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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：US11674247B2
公开(公告)日：2023-06-13
申请号：US17871167
申请日：2022-07-22
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 , D04H3/16 , D04H1/4382 , D04H1/552 , B82Y40/00
CPC classification number: D04H1/4334 , D04H1/43838 , D04H1/552 , D04H1/56 , D04H1/565 , D04H3/016 , D04H3/16 , 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：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：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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Patent Agency Ranking
公开(公告)号：US20180371656A1
公开(公告)日：2018-12-27
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 , D04H1/56 , D04H1/552
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：US12215225B2
公开(公告)日：2025-02-04
申请号：US17979161
申请日：2022-11-02
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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公开(公告)号：US20240074438A1
公开(公告)日：2024-03-07
申请号：US18451411
申请日：2023-08-17
Applicant: Ascend Performance Materials Operations LLC
Inventor： Scott E. Osborn , Wai-shing Yung , Albert Ortega
CPC classification number: A01N57/00 , A01N59/16 , D01D5/0985 , D01F8/12 , D04H1/4334 , D04H3/009 , D10B2331/02 , D10B2401/13 , Y10T442/607
Abstract: The present disclosure relates to a nonwoven polyamide structure having antimicrobial properties comprising: nonwoven polyamide fibers comprising less than 4000 ppm zinc dispersed within the nonwoven polyamide fibers; and less than 2000 ppm phosphorus. The fibers have an average fiber diameter of less than 25 microns; and the polyamide structure demonstrates a Staphylococcus aureus reduction of at least 90%, as measured by ISO 20743-13.
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公开(公告)号：US11758909B2
公开(公告)日：2023-09-19
申请号：US16719308
申请日：2019-12-18
Applicant: Ascend Performance Materials Operations LLC
Inventor： Scott E. Osborn , Wai-shing Yung , Albert Ortega
CPC classification number: A01N57/00 , A01N59/16 , D01D5/0985 , D01F8/12 , D04H1/4334 , D04H3/009 , D10B2331/02 , D10B2401/13 , Y10T442/607
Abstract: The present disclosure relates to a nonwoven polyamide structure having antimicrobial properties comprising: nonwoven polyamide fibers comprising less than 4000 ppm zinc dispersed within the nonwoven polyamide fibers; and less than 2000 ppm phosphorus. The fibers have an average fiber diameter of less than 25 microns; and the polyamide structure demonstrates a Staphylococcus Aureus reduction of at least 90%, as measured by ISO 20743-13.
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公开(公告)号：US11578438B2
公开(公告)日：2023-02-14
申请号：US17318494
申请日：2021-05-12
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 , D04H3/16 , D04H1/4382 , 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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