Method of Producing Ultra Thin Chitosan Fibers and Non-Woven Fabrics

Abstract

This invention provides a method of producing chitosan non-woven fabrics and an apparatus thereof. At first, a chitosan acidic solution is extruded to form a chitosan fibrous stream. Then, a solidifying agent is ejected to form a solidifying agent stream. The solidifying agent stream and the chitosan fibrous stream are combined to form a pre-solidified chitosan fiber. Then, high-pressure air is ejected on the pre-solidified chitosan fiber to stretch the pre-solidified chitosan fiber. Finally, the chitosan fibers are collected to form chitosan non-woven fabrics.

1 . An apparatus of producing chitosan non-woven fabrics, comprising:
 a raw material provider to provide a chitosan acidic solution;   at least a spinning nozzle, wherein each of the spinning nozzle comprises:
 a raw material nozzle applied to extrude the chitosan acidic solution; 
 a solidifying agent nozzle positioned around the raw material provider, wherein the solidifying agent nozzle and the raw material nozzle form a non-zero first angle and the solidifying agent nozzle is applied to eject a solidifying agent stream to solidify the chitosan acidic solution to a fiber; and 
 a high-pressure nozzle positioned around the solidifying agent nozzle, wherein the high-pressure nozzle and the raw material nozzle form a non-zero second angle and the high-pressure nozzle is applied to eject high-pressure air to stretch the fiber; and 
   a collecting apparatus applied to collect the fiber.   
     
     
         2 . The apparatus of  claim 1 , wherein the length of the solidifying agent nozzle is about 6˜40 mm. 
     
     
         3 . The apparatus of  claim 1 , wherein the first angle is less than 90°. 
     
     
         4 . The apparatus of  claim 1 , wherein the second angle is less than 90°. 
     
     
         5 . The apparatus of  claim 1 , further comprising a filter positioned between the raw material provider and the spinning nozzle, wherein the filter is applied to filter the chitosan acidic solution. 
     
     
         6 . A spinning nozzle, comprising:
 a raw material nozzle applied to extrude a chitosan acidic solution;   a solidifying agent nozzle positioned around the raw material nozzle, wherein the solidifying agent nozzle and the raw material nozzle form a non-zero first angle and the solidifying agent nozzle is applied to eject a solidifying agent stream to solidify the chitosan acidic solution to a fiber; and   a high-pressure nozzle positioned around the solidifying agent nozzle, wherein the high-pressure nozzle and the raw material nozzle form a non-zero second angle and the high-pressure nozzle is applied to eject high-pressure air to stretch the fiber.   
     
     
         7 . The spinning nozzle of  claim 6 , wherein the length of the solidifying agent nozzle is about 6˜40 mm. 
     
     
         7 . The spinning nozzle of  claim 6 , wherein the first angle is less than 90°. 
     
     
         8 . The spinning nozzle of  claim 6 , wherein the second angle is less than 90°