Nanofiber based composite false twist yarn and manufacturing method therefor

A method of manufacturing a nanofiber based composite false twist yarn, the method comprising:

• preparing a spinning solution by dissolving a fiber-forming polymer material in a solvent;
• electrospinning the spinning solution to obtain a polymer nanofiber web, the polymer nanofiber web being formed of polymer nanofibers having an average diameter of less than 1 μm;
• laminating the polymer nanofiber web to obtain a polymer nanofiber membrane;
• winding the polymer nanofiber membrane to obtain a first rolled polymer nanofiber membrane having a first roll width and a first roll diameter,
• primary-slitting the first rolled polymer nanofiber membrane to obtain a plurality of second rolled polymer nanofiber membranes each having a second roll width being smaller than the first roll width and the second roll diameter being same as the first roll diameter;
• bonding at least two of the second rolled polymer nanofiber membranes to form a third rolled polymer nanofiber membrane having a third roll width being same as the second roll width and a third roll diameter being larger than the second roll diameter;
• secondary-slitting the third rolled polymer nanofiber membrane to obtain a nanofiber tape yarn;
• and
• obtaining a composite false twist yarn by composite-false-twisting the nanofiber tape yarn or a false twist yarn obtained by false-twisting the nanofiber tape yarn with a natural fiber yarn or a synthetic fiber yarn.