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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：US20230250232A1
公开(公告)日：2023-08-10
申请号：US18135130
申请日：2023-04-15
Applicant: Ascend Performance Materials Operations LLC
Inventor： James E. Polk , Chris E. Schwier , Ashish Sen , Craig A. Trask , Cihan Uzunpinar , Chie-Hsiung Wang , J. Marty Zabcik
IPC: C08G69/30 , B29C48/00 , B29C48/40 , B29C48/14 , B29C48/25 , B29B13/00 , C08G69/06 , C08G69/08 , C08G69/04 , C08G69/28 , B29B13/06 , B29B13/02 , B29B9/12 , C08G69/36 , D01F6/60
CPC classification number: C08G69/30 , B29C48/022 , B29C48/40 , B29C48/144 , B29C48/267 , B29B13/00 , C08G69/06 , C08G69/08 , C08G69/04 , C08G69/28 , B29B13/06 , B29B13/022 , B29C48/00 , B29B9/12 , C08G69/36 , D01F6/60 , B29C2791/006 , B29B2013/005 , B29C48/04
Abstract: A customizable polyamide polymer, in particular Nylon 66, Nylon 6, and copolyamides, having a high molecular weight, excellent color, and low gel content is disclosed. In particular, disclosed is a polymer having a relative viscosity greater than 50 as measured in a 90% strength formic acid solution; consistent viscosity with a standard deviation of less than 1; a gel content no greater than 50 ppm as measured by insolubles larger than 10 micron; an optical defect content of less than 2,000 parts per million (ppm) as measured by optical control system (OCS). The polymer can be made into monofilaments or a multifilament yarn.
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公开(公告)号：US20180340042A1
公开(公告)日：2018-11-29
申请号：US15778778
申请日：2016-11-29
Applicant: Ascend Performance Materials Operations LLC
Inventor： James E. Polk , Chris E. Schwier , Ashish Sen , Craig A. Trask , Cihan Uzunpinar , Chie-Hsiung Wang , J. Marty Zabcik
Abstract: A customizable polyamide polymer, in particular Nylon 66, Nylon 6, and copolyamides, having a high molecular weight, excellent color, and low gel content is disclosed. In particular, disclosed is a polymer having a relative viscosity greater than 50 as measured in a 90% strength formic acid solution; consistent viscosity with a standard deviation of less than 1; a gel content no greater than 50 ppm as measured by insolubles larger than 10 micron; an optical defect content of less than 2,000 parts per million (ppm) as measured by optical control system (OCS). The polymer can be made into monofilaments or a multifilament yarn.Also disclosed is a process of producing the polymer using in-line vacuum finishing technology in the absence of steam or other gases in the second, or post condensation, step of the polymer process.
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