SOLUTION-SPUN POLYAMIDE NANOFIBER NONWOVENS

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 weigh...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	OSBORN, Scott, E, SCHOOTS, Harrie, P, YUNG, Wai-Shing, TRASK, Craig, A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL BRAIDING COFFEE MILLS COTTON-WOOL DOMESTIC ARTICLES OR APPLIANCES FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FURNITURE HOUSEHOLD OR TABLE EQUIPMENT HUMAN NECESSITIES KNITTING LACE-MAKING LAUNDERING MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS PERFORMING OPERATIONS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPICE MILLS SPRAYING OR ATOMISING IN GENERAL SUCTION CLEANERS IN GENERAL TEXTILES TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS TRIMMINGS WADDING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	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. La présente invention concerne un polymère, des applications de ce dernier et un procédé de fabrication d'un produit non tissé de nanofibres, lequel procédé consiste : à fournir une composition de polymère de polyamide filable comprenant une solution d'un polyamide dans un solvant approprié, le polyamide ayant une viscosité relative de 30-300 ; un poids de base supérieur à 1 gm/m 2, filant par solution la composition de polymère de polyamide en une pluralité de nanofibres ayant un diamètre moyen de fibre inférieur à 1 micron (1000 nanomètres) ; et à former les nanofibres dans ledit produit non tissé qui présente ainsi un diamètre moyen de nanofibres inférieur à 1 micron (1000 nanomètres). De préférence, le produit non tissé est filé en solution à partir d'un procédé choisi parmi (i) un filage centrifuge à l'aide d'une filière rotative ou (ii) un filage de gaz propulseur à deux phases comprenant l'extrusion de la composition de polymère de polyamide sous forme liquide avec du gaz sous pression à travers un canal de formation de fibres. Les solvants appropriés comprennent de l'acide formique, de l'acide sulfurique, de l'acide trifluoroacétique, de l'hexafluoroisopropanol (HFIP) et des phénols comprenant du m-crésol.