Hollow fiber membrane and method for manufacturing the same

Abstract

The present invention relates to a through-one-end water collection type hollow fiber membrane and a method for manufacturing the same. According to the present invention, an internal sealing part is formed in the hollow part of the membrane at its free end. The internal sealing part supports an external sealing part surrounding the external surface of the free end such that the durability of the whole sealing part might be improved.

1 . A hollow fiber membrane comprising:
 an external sealing part surrounding an external surface of a first end of the hollow fiber membrane; and   an internal sealing part in a hollow part of the hollow fiber membrane at the first end.   
     
     
         2 . The hollow fiber membrane of  claim 1 , wherein the length of the internal sealing part is 1 to 200% of the length of the external sealing part, the length of the internal and external sealing parts being parallel to a longitudinal direction of the hollow fiber membrane. 
     
     
         3 . The hollow fiber membrane of  claim 1 , wherein the external and internal sealing parts are formed of a same material. 
     
     
         4 . The hollow fiber membrane of  claim 3 , wherein the external and internal sealing parts each comprise a polyurethane, a silicone, a heat-cured polymer, or a UV-cured polymer. 
     
     
         5 . The hollow fiber membrane of  claim 1 , wherein a cross section of the external sealing part perpendicular to the longitudinal direction of the hollow fiber membrane becomes smaller as farther from a second end of the hollow fiber membrane opposite to the first end.