EP 3760774 A1 20210106 - PREPARATION METHOD FOR LONG CONTINUOUS ELECTROSPUN POLYACRYLONITRILE NANOFIBER YARN, AND APPLICATION THEREOF
Title (en)
PREPARATION METHOD FOR LONG CONTINUOUS ELECTROSPUN POLYACRYLONITRILE NANOFIBER YARN, AND APPLICATION THEREOF
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES KONTINUIERLICHEN FILAMENTGARNS AUS ELEKTROGESPONNENEN PPOLYACRYLONITRILNANOFASERN UND VERWENDUNG DAVON
Title (fr)
PROCÉDÉ DE PRÉPARATION DE FIL DE NANOFIBRES DE POLYACRYLONITRILE ÉLECTROFILÉES LONGUES CONTINUES ET APPLICATION ASSOCIÉE
Publication
Application
Priority
- CN 201910422360 A 20190521
- CN 2019106959 W 20190920
Abstract (en)
A method a for preparing a continuous filament yarn of electrospun polyacrylonitrile nanofibers, comprising the following steps: a. dissolving a polyacrylonitrile raw material in a polar solvent under mechanical stirring to obtain a uniform spinning solution; b. mading the polyacrylonitrile solution in the step a into a polyacrylonitrile nonwoven fabric in an electrospinning machine; c. cutting the nonwoven fabric in the step b into slender strips with a width of 0.5 to 6 cm; d. drafting the slender strips in the step c in a water bath at 80-95°C with a draft ratio of 2 to 5 times, then drafting in air at 110 to 150°C with a draft ratio of 3 to 10 times to obtain a fiber bundle with highly oriented internal fibers; e. twisting the fiber bundle in the step d to obtain a continuous filament yarn of electrospun polyacrylonitrile nanofibers with a length of not less than 2000 meters.
IPC 8 full level
D02G 3/02 (2006.01); D01D 5/42 (2006.01); D01D 10/02 (2006.01); D02G 3/26 (2006.01); D04H 3/007 (2012.01); D04H 3/033 (2012.01)
CPC (source: CN EP)
D01D 5/003 (2013.01 - EP); D01D 5/426 (2013.01 - EP); D01F 6/18 (2013.01 - EP); D02G 3/02 (2013.01 - CN); D02G 3/06 (2013.01 - EP); D02G 3/26 (2013.01 - CN); D02J 1/223 (2013.01 - CN); D02J 1/228 (2013.01 - CN); D04H 3/007 (2013.01 - CN); D04H 3/033 (2013.01 - CN); D10B 2321/10 (2013.01 - CN EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3760774 A1 20210106; EP 3760774 A4 20210714; CN 110129934 A 20190816; WO 2020232931 A1 20201126
DOCDB simple family (application)
EP 19909629 A 20190920; CN 201910422360 A 20190521; CN 2019106959 W 20190920