Elastic hydrophilic non woven fabric and fabrication method thereof

Abstract

An elastic hydrophilic non-woven fabric is provided, which is made from composition grains using a meltblown process. The composition grains include 3 to 30 parts by weight of a hydrophilic auxiliary agent and 70 to 97 parts by weight of a hydrogenated styrene based triblock copolymer based on 100 parts by total weight. The hydrophilic auxiliary agent includes polylactic acid and polyvinyl acetate. A method that the elastic hydrophilic non-woven fabric is fabricated at least includes a step to melt the composition grains to form a melt body, and a step to squeezed the melt body through a spinneret by the meltblown process, then the elastic hydrophilic non-woven fabric is finished. Hence, the elastic hydrophilic non-woven fabric has both of elasticity and hydrophilicity.

What is claimed is: 
     
         1 . An elastic hydrophilic non-woven fabric, formed by a fiber made from composition grains using a meltblown process, the composition grains include 3 to 30 parts by weight of a hydrophilic auxiliary agent and 70 to 97 parts by weight of a hydrogenated styrene based triblock copolymer, the hydrophilic auxiliary agent includes a polylactic acid and a polyvinyl acetate. 
     
     
         2 . The elastic hydrophilic non-woven fabric according to  claim 1 , wherein the hydrophilic auxiliary agent at least includes the polylactic acid with 50 wt % to 80 wt % and the polyvinyl acetate with 20 wt % to 50 wt % based on a total weight of the hydrophilic auxiliary agent. 
     
     
         3 . The elastic hydrophilic non-woven fabric according to  claim 1 , wherein the hydrogenated styrene based triblock copolymer is selected-hydrogenated monoalkenyl arene-conjugated alkadiene-monoalkenyl arene. 
     
     
         4 . The elastic hydrophilic non-woven fabric according to  claim 1 , wherein the hydrogenated styrene based triblock copolymer has a chemical structure according to Formula (1), 
       
         
           
           
               
               
           
         
          wherein X is an integer from 150 to 240, Y and Z are an integer from 60 to 300. 
       
     
     
         5 . The elastic hydrophilic non-woven fabric according to  claim 1 , wherein the fiber has a diameter from 2 μm to 20 μm. 
     
     
         6 . The elastic hydrophilic non-woven fabric according to  claim 1 , wherein after the composition grains are melted to be a melt body, the melt body has Melt Flow Index from 50 g/10 min to 100 g/10 min. 
     
     
         7 . The elastic hydrophilic non-woven fabric according to  claim 1 , wherein the elastic hydrophilic non-woven fabric is provided with 1.5 to 3 times of a draw ratio when encountering a tension force from 0.3 Kgf to 0.5 Kgf and 300 mm/min of a tension speed. 
     
     
         8 . A fabrication method for an elastic hydrophilic non-woven fabric, comprising following steps:
 forming grains, the grains are formed by mixing 3 to 30 parts by weight of a hydrophilic auxiliary agent and 70 to 97 parts by weight of a hydrogenated styrene based triblock copolymer, wherein the hydrophilic auxiliary agent includes polylactic acid and polyvinyl acetate;   melting the grains to form a melt body; and   performing a meltblown process on the melt body, the melt body is squeezed by a spinneret, and then formed a fiber for fabricating the elastic hydrophilic non-woven fabric.   
     
     
         9 . The fabrication method for an elastic hydrophilic non-woven fabric according to  claim 8 , wherein the meltblown process includes a processing temperature comprising a first processing temperature from 200° C. to 230° C. and a second processing temperature from 250° C. to 270° C. 
     
     
         10 . The fabrication method for an elastic hydrophilic non-woven fabric according to  claim 8 , wherein the meltblown process includes a feeding temperature from 150° C. to 160° C.