Dental cord using nanofiber conjugate yarn, and manufacturing method therefor

Abstract

Provided is a dental cord using a nanofiber multiple yarn having a large specific surface area and a large number of three-dimensional pores, thereby effectively impregnating a drug such as a hemostatic agent, and a method of manufacturing the dental cord. The dental cord includes: a nanofiber multiple yarn which is obtained by plying and twisting at least two nanofiber tape yarns and which is impregnated with a drug, wherein the at least two nanofiber tape yarns are integrated by nanofibers made of fiber moldability polymer materials and having an average diameter of less than 1 μm, to thus be formed of a nanofiber web having three-dimensional micropores.

What is claimed is: 
     
         1 . A dental cord comprising:
 a nanofiber multiple yarn which is obtained by plying and twisting at least two nanofiber tape yarns and which is impregnated with a drug,   wherein the at least two nanofiber tape yarns are integrated by nanofibers made of fiber moldability polymer materials and having an average diameter of less than 1 μm, to thus be formed of a nanofiber web having three-dimensional micropores.   
     
     
         2 . The dental cord of  claim 1 , wherein the nanofiber multiple yarn is formed by plying and twisting two or three nanofiber tape yarns. 
     
     
         3 . The dental cord of  claim 1 , wherein the nanofiber multiple yarn is configured so that a covered yarn is covered with the nanofiber tape yarn. 
     
     
         4 . The dental cord of  claim 3 , wherein the covered yarn is made of natural fibers. 
     
     
         5 . The dental cord of  claim 1 , wherein the nanofiber tape yarn is obtained by slitting the nanofiber web at a width of 0.1 mm to 10 mm. 
     
     
         6 . The dental cord of  claim 1 , wherein the average pore size of the nanofiber web is set to 0.2 μm to 1.0 μm, and the fiber diameter is set to 0.05 μm to 1 μm. 
     
     
         7 . A method of manufacturing a dental cord, the method comprising the steps of:
 producing a spinning solution, by dissolving a fiber-moldability polymer material in a solvent to prepare a spinning solution;   spinning the spinning solution to obtain a polymer nanofiber web composed of nanofibers having an average diameter of less than 1 μm;   laminating the nanofiber web to obtain a polymer membrane;   slitting the polymer membrane to obtain a nanofiber tape yarn;   plying and twisting the nanofiber tape yarn to obtain a nanofiber multiple yarn; and   impregnating the nanofiber multiple yarn with a hemostatic agent.   
     
     
         8 . The dental cord manufacturing method of  claim 7 , wherein the nanofiber multiple yarn comprises two or three nanofiber tape yams. 
     
     
         9 . The dental cord manufacturing method of  claim 7 , wherein the nanofiber multiple yarn is configured so that a covered yarn made of natural fibers is covered with the nanofiber tape yarn. 
     
     
         10 . The dental cord manufacturing method of  claim 7 , wherein the nanofiber tape yarn is a hydrophilic polymer. 
     
     
         11 . The dental cord manufacturing method of  claim 7 , wherein the nanofiber tape yarn is a hydrophobic polymer, and is processed to be hydrophilic. 
     
     
         12 . The dental cord manufacturing method of  claim 7 , further comprising the step of thermally stretching the nanofiber multiple yarn obtained by plying and twisting the yarn between a glass transition temperature (Tg) and a melting temperature (Tm) of the polymer.