Spinneret for preparing island-in-the-sea yarns

Abstract

Disclosed is a spinneret for preparing island-in-the-sea yarns, wherein island ingredient supply channels are partitioned into a plurality of groups in a discharge portion. The island-in-the-sea yarns prepared using the spinneret can prevent aggregation of island portions in the center thereof, although the number of island portions is 500 or more. Accordingly, island-in-the-sea yarns are considerably advantageous for the preparation of microfibers, since 500 or more island portions can be disposed in one island-in-the-sea yarn and fineness of island portions can thus be reduced. In addition, the island-in-the-sea yarns have an advantage of considerably reduced production costs, since 500 or more microfibers can be produced from one island-in-the-sea yarn. Furthermore, the island-in-the-sea yarns render a specific color according to the ratio of sea portions to island portions and diameter of fibers, without adding chromogenic compounds such as dyes, and are thus applicable to photochromic fibers.

1 . A spinneret for preparing island-in-the-sea yarns comprising:
 a discharge portion comprising a plurality of island ingredient supply channels to discharge island-in-the-sea yarns; and   a peripheral portion arranged in the periphery of the discharge portion, the peripheral portion comprising a sea ingredient supply channel,   wherein the island ingredient supply channels are partitioned into a plurality of groups in the discharge portion.   
     
     
         2 . The spinneret according to  claim 1 , wherein the island ingredient supply channels are grouped based on two or more spinning cores. 
     
     
         3 . The spinneret according to  claim 2 , wherein the spinning cores include one standard spinning core arranged in the center of the discharge portion and a plurality of peripheral spinning cores arranged based on the standard spinning core. 
     
     
         4 . The spinneret according to  claim 3 , wherein the peripheral spinning cores are 3 to 20 in number. 
     
     
         5 . The spinneret according to  claim 3 , wherein the peripheral spinning cores are 6 to 10 in number. 
     
     
         6 . The spinneret according to  claim 3 , wherein the number of island ingredient supply channels arranged with respect to one standard spinning core or one peripheral spinning core is 10 to 300. 
     
     
         7 . The spinneret according to  claim 3 , wherein the sea ingredient supply channel is interposed between the standard spinning core and the peripheral spinning core. 
     
     
         8 . The spinneret according to  claim 1 , wherein the total number of the island ingredient supply channels is 38 to 1,500. 
     
     
         9 . The spinneret according to  claim 1 , wherein the total number of the island ingredient supply channels is 500 to 1,500. 
     
     
         10 . The spinneret according to  claim 1 , wherein the total number of the island ingredient supply channels is 1,000 to 1,500. 
     
     
         11 . The spinneret according to  claim 1 , wherein the spinning cores are arranged based on the center of the discharge portion. 
     
     
         12 . The spinneret according to  claim 11 , wherein a sea ingredient supply channel is arranged in the center of the discharge portion. 
     
     
         13 . The spinneret according to  claim 11 , wherein the sea ingredient supply channel is arranged between the spinning cores. 
     
     
         14 . The spinneret according to  claim 11 , wherein the discharge portion has a diameter of 15 to 50 mm, and the island ingredient supply channel or the sea ingredient supply channel has a diameter of 0.1 to 0.3 mm. 
     
     
         15 . The spinneret according to  claim 1 , wherein the island ingredient supply channel group has a diameter of 8 to 15 mm. 
     
     
         16 . The spinneret according to  claim 1 , wherein the discharge portion is 2 to 20 in number. 
     
     
         17 . The spinneret according to  claim 1 , wherein the discharge portion further comprises one or more sea ingredient supply channels. 
     
     
         18 . The spinneret according to  claim 1 , wherein a maximum distance between the centers of adjacent island ingredient supply channels present in one group is smaller than a maximum distance between the centers of adjacent island ingredient supply channels present in two adjacent groups. 
     
     
         19 . An island-in-the-sea yarn spun using the spinneret according to  claim 1 .