Method for producing fibers and non-woven fabrics by solution blow spinning and non-woven fabric produced thereby

Abstract

The invention refers to the use of a parent solution (A) during a method for producing fibers for a fiber fleece by a so-called solution blow spinning. Water is used as solvent for the parent solution (A). At least one water-soluble polymer and preferably exactly one water-soluble polymer is dissolved in the water of the parent solution (A). The parent solution (A) additionally contains at least one surfactant and optionally plasticizer for the used at least one polymer respectively. By means of a parent solution (A) it is possible to produce fibers ( 24 ) by solution blow spinning.

1 . A method for producing fibers and fleece materials ( 24 ) by solution blow spinning using a parent solution (A), the method comprising:
 formulating the parent solution (A) using water as a solvent,   dissolving at least one water-soluble polymer in the parent solution (A),   adding at least one surfactant to the parent solution (A); and   producing at least one of a fiber and a fleece material by solution blow spinning using the parent solution (A).   
     
     
         2 . The method according to  claim 1 , wherein formulating the parent solution (A) includes using water exclusively as the solvent. 
     
     
         3 . The method according to  claim 1 , wherein the at least one water-soluble polymer in the parent solution (A) contains exclusively polymers that are water-soluble. 
     
     
         4 . The method according to  claim 1 , wherein the at least one water-soluble polymer is one or any combination of polyvinyl alcohol, polyvinyl methyl ether, polyethylene oxide, polyvinyl pyrrolidone, polyethylene glycol, polyacrylic acid, and polyacrylamide. 
     
     
         5 . The method according to  claim 1 , wherein the concentration of the water in the parent solution (A) has an amount of 30 wt-% to 99 wt-%. 
     
     
         6 . The method according to  claim 5 , wherein the concentration of the water in the parent solution (A) has an amount of 50 wt-% to 95 wt-%. 
     
     
         7 . The method according to  claim 6 , wherein the concentration of water in the parent solution (A) has an amount of 60 wt-% to 90 wt-%. 
     
     
         8 . The method according to  claim 1 , wherein the concentration of the at least one water-soluble polymer in the parent solution (A) has an amount of 1 wt-% to 70 wt-%. 
     
     
         9 . The method according to  claim 8 , wherein the concentration of the at least one water-soluble polymer in the parent solution (A) has an amount of 5 wt-% to 50 wt-%. 
     
     
         10 . The method according to  claim 8 , wherein the concentration of the at least one water-soluble polymer in the parent solution (A) has an amount of 10 wt-% to 40 wt-%. 
     
     
         11 . The method according to  claim 1 , wherein the concentration of the at least one surfactant in the parent solution (A) has an amount of 0.001 wt-% to 50 wt-%. 
     
     
         12 . The method according to  claim 11 , wherein the concentration of the at least one surfactant in the parent solution (A) has an amount of 0.01 wt-% to 5 wt-%. 
     
     
         13 . The method according to  claim 12 , wherein the concentration of the at least one surfactant in the parent solution (A) has an amount of 0.1 wt-% to 1.5 wt-%. 
     
     
         14 . The method according to  claim 1 , wherein the at least one surfactant has a characteristic to at least partly evaporate during the solution blow spinning. 
     
     
         15 . The method according to  claim 1 , wherein the parent solution comprises solid particles. 
     
     
         16 . The method according to  claim 1 , further comprising:
 emitting the parent solution (A) from at least one first output nozzle ( 20 ),   emitting a process gas (G) from at least one second output nozzle ( 21 ) that is arranged adjacent to the at least one first output nozzle ( 20 ) while concurrently with the emitting the parent solution (A) from the at least one first output nozzle.   
     
     
         17 . The method according to  claim 16 , further comprising producing one or any combination of microfibers, sub-microfibers, nanofibers, and fleece materials formed thereof. 
     
     
         18 . The method according to  claim 16 , further comprising supplying the process gas (G) to the at least one second output nozzle ( 21 ) at a pressure of 0.1 to 100 psi. 
     
     
         19 . The method according to  claim 18 , further comprising supplying the process gas (G) to the at least one second output nozzle ( 21 ) a pressure of 5 to 80 psi. 
     
     
         20 . The method according to  claim 19 , further comprising supplying the process gas (G) to the at least one second output nozzle ( 21 ) a pressure of 10 to 60 psi. 
     
     
         21 . The method according to  claim 16 , further comprising supplying the process gas (G) to the at least one second output nozzle ( 21 ), wherein the process gas (G) has a temperature of 0° C. to 100° C. 
     
     
         22 . The method according to  claim 21 , wherein the process gas (G) has a temperature of 10° C. to 90° C. 
     
     
         23 . The method according to  claim 21 , wherein the process gas (G) has a temperature of 20° C. to 80° C. 
     
     
         24 . The method according to  claim 16 , wherein the solvent in the parent solution (A) evaporates at least partly after the parent solution is emitted from the at least one first output nozzle ( 20 ). 
     
     
         25 . (canceled)