Elastic polyurethane thread and manufacturing method thereof

Abstract

In order to provide an elastic polyurethane thread with excellent antibacterial and deodorant properties as well as excellent color fastness, an elastic polyurethane thread is made which consists of polyurethanes which have polymer diols and diisocyanates as the starting materials, contains metallic phosphates in the range of 0.5-10 wt %, and has an emitted quantity of monoamine compounds with molecular weights of 120 or less of 100 μg/m 2 or more.

1 . An elastic polyurethane thread which is an elastic thread consisting of a polyurethane which has polymer diols and diisocyanates as the starting materials, contains metallic phosphates, and has an emitted quantity of monoamine compounds with molecular weights of 120 or less of 100 μg/m 2  or more. 
     
     
         2 . An elastic polyurethane thread in accordance with claim ( 1 ) above in which the content of the aforementioned metallic phosphates is in the range of 0.5-10 wt %. 
     
     
         3 . An elastic polyurethane thread in accordance with claim ( 1 ) above in which the average primary particle diameter of the aforementioned metallic phosphates is 3.0μ or less. 
     
     
         4 . An elastic polyurethane thread in accordance with claim ( 1 ) above in which the aforementioned metallic phosphates are at least one selected from a group comprising titanium phosphate, zirconium phosphate, and aluminum dihydrogen tripolyphosphate. 
     
     
         5 . An elastic polyurethane thread in accordance with claim ( 1 ) above in which the aforementioned emitted monoamine compounds are secondary monoamine compounds. 
     
     
         6 . An elastic polyurethane thread in accordance with claim ( 1 ) above which also contains quaternary ammonium salt compounds. 
     
     
         7 . An elastic polyurethane thread in accordance with claim ( 6 ) above in which the aforementioned quaternary ammonium salt compounds have the following structure: 
       
         
           
           
               
               
           
         
         (wherein 
         R1 and R2 are hydrogens or alkyl groups with carbon numbers of 1-3 (which may be the same or different), 
         R3 is an alkyl group with a carbon number of 10-22, 
         R4 is an alkyl group with a carbon number of 1-22 (which may be the same or different from R1, R2, and R3), and R4 is an alkyl group with a carbon number of 1-22 (which may be the same or different from R1, R2, and R3), and 
         X is an acidic counterion). 
       
     
     
         8 . An elastic polyurethane thread in accordance with claim ( 6 ) above in which the content of the aforementioned quaternary ammonium salt compounds is in the range of 0.1-5 wt %. 
     
     
         9 . A method of manufacturing an elastic polyurethane thread in which metallic phosphates are mixed with a spinning dope which contains polyurethanes which have polymer diols and diisocyanates as starting materials, mixing is performed in such a way that the content of monoamine compounds with molecular weights of 120 or less is in the range of 0.01-0.5 mass %, and this spinning dope is dry-spun. 
     
     
         10 . A method of manufacturing an elastic polyurethane thread in accordance with claim ( 9 ) in which the aforementioned metallic phosphates are mixed in with the spinning dope which contains polyurethanes which have polymer diols and diisocyanates as starting materials as a dispersion liquid. 
     
     
         11 . An elastic polyurethane thread in accordance with claim ( 9 ) in which the aforementioned metallic phosphates are at least one selected from a group comprising titanium phosphate, zirconium phosphate, and aluminum dihydrogen tripolyphosphate. 
     
     
         12 . An elastic polyurethane thread in accordance with claim ( 9 ) in which the aforementioned monoamine compounds with molecular weights of 120 or less are secondary amine compounds.