Water based bond sewing thread and method of manufacturing the same

Abstract

A method of manufacturing a bonded sewing thread comprises the steps of forming coating liquid by adding catalyst of 1 to 5 wt % to a mixture of 95 to 99 wt % in which polyester polyol of 39 to 43 wt %, aliphatic isophthalic diisocyanate of 7 to 11 wt % (MW is 222.2 and viscosity is 500 to 1000 CPS/25° C.), polyester sulfur oxide diol of 1 to 5 wt % as water based monomer (MW is 400 to 500 and viscosity is 500 to 1000 CPS/25° C.), and water of 49 to 53 wt % are uniformly mixed; coating the sewing thread by dipping the sewing thread in the mixed coating liquid; a dry step of drying the coated sewing thread in a temperature range of 120 to 180° C. for 20 to 60 seconds; curing the dried sewing thread in a temperature range of 150 to 200° C. for 20 to 40 seconds; elongating the cured sewing thread in a temperature range of 150 to 200° C. for 15 to 20 seconds so that the sewing thread has elongation of 30 to 60%; and winding the elongated sewing thread.

1 . A method of manufacturing a bonded sewing thread, comprising the steps of:
 forming a mixed coating liquid by adding catalyst of 1 to 5 wt % to a mixture of 95 to 99 wt % in which polyester polyol of 39 to 43 wt %, aliphatic isophthalic diisocyanate of 7 to 11 wt % (molecular weight (MW) is 222.2 and viscosity is 500 to 1000 CPS/25° C. (Brookfield viscometer)), polyester sulfur oxide diol of 1 to 5 wt % as water based monomer (molecular weight (MW) is 400 to 500 and viscosity is 500 to 1000 CPS/25° C. (Brookfield viscometer)), and water of 49 to 53 wt % are uniformly mixed;   coating the sewing thread by dipping the sewing thread in the mixed coating liquid;   drying the coated sewing thread in a temperature range of 120 to 180° C. for 20 to 60 seconds;   curing the dried sewing thread in a temperature range of 150 to 200° C. for 20 to 40 seconds;   elongating the cured sewing thread in a temperature range of 150 to 200° C. for 15 to 20 seconds so that the sewing thread has elongation of 30 to 60%; and   winding the elongated sewing thread.   
     
     
         2 . The method according to  claim 1 , wherein the catalyst is formed by mixing aliphatic isophthalic diisocyanate and ethyl acetate and used to control strength. 
     
     
         3 . The method according to  claim 1 , wherein the coating liquid further comprises water repellent liquid in which water based bond of 46 to 51 wt %, water of 46 to 51 wt %, and water repellents of 3 to 8 wt % are mixed. 
     
     
         4 . A bonded sewing thread manufactured by coating the sewing thread by dipping the sewing thread in coating liquid, produced by mixing catalyst of 1 to 5 wt % and a mixture of 95 to 99 wt % in which polyester polyol of 39 to 43 wt %, aliphatic isophthalic diisocyanate of 7 to 11 wt % (molecular weight (MW) is 222.2 and viscosity is 500 to 1000 CPS/25° C. (Brookfield viscometer)), polyester sulfur oxide diol of 1 to 5 wt % as water based monomer (molecular weight (MW) is 400 to 500 and viscosity is 500 to 1000 CPS/25° C. (Brookfield viscometer)), and water of 49 to 53 wt % are uniformly mixed; drying the coated sewing thread in a temperature range of 120 to 180° C. for 20 to 60 seconds; curing the dried sewing thread in a temperature range of 150 to 200° C. for 20 to 40 seconds; elongating the cured sewing thread in a temperature range of 150 to 200° C. for 15 to 20 seconds so that the sewing thread has elongation of 30 to 60%; and winding the elongated sewing thread. 
     
     
         5 . The bond sewing thread according to  claim 4 , wherein the catalyst is formed by mixing aliphatic isophthalic diisocyanate and ethyl acetate and used to control strength. 
     
     
         6 . The bond sewing thread according to  claim 4 , wherein the coating liquid further comprises water repellent liquid in which water based bond of 46 to 51 wt %, water of 46 to 51 wt %, and water repellents of 3 to 8 wt % are mixed. 
     
     
         7 . The method according to  claim 2 , wherein the coating liquid further comprises water repellent liquid in which water based bond of 46 to 51 wt %, water of 46 to 51 wt %, and water repellents of 3 to 8 wt % are mixed. 
     
     
         8 . The bond sewing thread according to  claim 5 , wherein the coating liquid further comprises water repellent liquid in which water based bond of 46 to 51 wt %, water of 46 to 51 wt %, and water repellents of 3 to 8 wt % are mixed.