Method for manufacturing antibacterial copper nanofiber yarn

Abstract

A method for manufacturing antibacterial copper nanofiber yarn includes steps of: raw material mixing operation and spinning operation, where the raw material mixing operation is to mix dry copper nanopowder having a particle size of no more than 48 nm with fiber slurry; and the spinning operation includes the following steps: mixing and stirring the copper nanopowder and the fiber slurry so that the copper nanopowder is uniformly distributed in the fiber slurry to prepare a mixed material; drying the mixed material; hot-melt drawing the mixed material, i.e. drawing out yarn with the dried mixed material through a drawing machine to form first-stage yarn; stretching and extending, i.e. passing the first-stage yarn through a plurality of rollers to stretch the first-stage yarn; naturally air-cooling the first-stage yarn to form second-stage yarn; and collecting yarn, i.e. collecting the second-stage yarn to fabricate an antibacterial copper nanofiber yarn finished product.

What is claimed is: 
     
         1 . A method for manufacturing antibacterial copper nanofiber yarn, comprising the following steps:
 raw material mixing operation: mixing dry copper nanopowder having an averaged particle size of no more than 48 nm with fiber slurry; and   spinning operation, comprising the following steps:   mixing and stirring the copper nanopowder and the fiber slurry so that the copper nanopowder is uniformly distributed in the fiber slurry to form a mixed material;   drying the mixed material to remove excessive moisture, wherein the temperature for drying is controlled at 100° C.-150° C.;   hot-melt drawing the mixed material, i.e. drawing out yarn with the dried mixed material through a drawing machine to form first-stage yarn;   stretching and extending, i.e. passing the first-stage yarn through a plurality of rollers to stretch the first-stage yarn;   naturally air-cooling the first-stage yarn to shape the first-stage yarn to form second-stage yarn; and   collecting yarn, i.e. collecting the second-stage yarn to fabricate an antibacterial copper nanofiber yarn finished product.   
     
     
         2 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 1 , wherein the copper nanopowder is mixed with the fiber slurry in a weight percentage range of 0.1%-30%. 
     
     
         3 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 1 , wherein the copper nanopowder added to the fiber slurry is in a weight percentage range of 20%-24%. 
     
     
         4 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 1 , wherein the fiber slurry comprises thermoplastic polyurethane (TPU), thermoplastic rubber (TRP), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA), polybutylene terephthalate (PBT), ethylene-vinyl acetate copolymer (EVA) or nylon. 
     
     
         5 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 1 , wherein after the step of collecting yarn, i.e. collecting the second-stage yarn, the second-stage yarn is further dried to have the humidity in the second-stage yarn reduced. 
     
     
         6 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 5 , wherein the drying time of the second-stage yarn is 48 hours. 
     
     
         7 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 1 , wherein in the step of yarn collecting, the second-stage yarn is furled on a wheel by means of winding. 
     
     
         8 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 1 , wherein in the step of yarn collecting, the second-stage yarn is furled in a container by means of winding. 
     
     
         9 . A method for manufacturing antibacterial copper nanofiber yarn, comprising the following steps:
 raw material mixing operation: mixing dry copper nanopowder having an averaged particle size of no more than 48 nm with fiber slurry to form a mixed raw material;   mixing and granulating operation: heating, blending, extruding and granulating the mixed raw material through a mixer, and then melting to form a plurality of antibacterial copper nano-masterbatches; and   spinning operation, comprising the following steps:   mixing and stirring the antibacterial copper nano-masterbatches and a plurality of thermoplastic polyurethane colloidal particles to form a mixed material;   drying the mixed material to remove excessive moisture, wherein the temperature for drying is controlled at 100° C.-150° C.;   hot-melt drawing the mixed material, i.e. drawing out yarn with the dried mixed material through a drawing machine, and at a yarn drawing port, simultaneously allowing the thermoplastic polyurethane colloidal particles to wrap around the outer side of the yarn after hot-melt to form the whole into first-stage yarn;   water-cooling the first-stage yarn with a cooling tank to shape the first-stage yarn;   stretching and extending, i.e. passing the first-stage yarn through a plurality of rollers to stretch the first-stage yarn;   naturally air-cooling the first-stage yarn to reduce deformation of the surface of the first-stage yarn and shape the interior of the first-stage yarn, so that the first-stage yarn forms second-stage yarn; and   collecting yarn, i.e. collecting the second-stage yarn to fabricate an antibacterial copper nanofiber yarn finished product.   
     
     
         10 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 9 , wherein the copper nanopowder is mixed with the fiber slurry in a weight percentage range of 0.1%-30%. 
     
     
         11 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 9 , wherein the copper nanopowder added to the fiber slurry is in a weight percentage range of 20%-24%. 
     
     
         12 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 9 , wherein the fiber slurry comprises thermoplastic polyurethane (TPU), thermoplastic rubber (TPR), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyamide (PA), polybutylene terephthalate (PBT), ethylene-vinyl acetate copolymer (EVA) or nylon. 
     
     
         13 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 9 , wherein after the step of collecting yarn, i.e. collecting the second-stage yarn, the second-stage yarn is further dried to have the humidity in the second-stage yarn reduced. 
     
     
         14 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 13 , wherein the drying time of the second-stage yarn is 48 hours. 
     
     
         15 . The method for manufacturing antibacterial copper nanofiber yarn of  claim 9 , wherein in the step of mixing and stirring the antibacterial copper nano-masterbatches and the plurality of thermoplastic polyurethane colloidal particles, a colorant can be simultaneously added to color the plurality of thermoplastic polyurethane colloidal particles.