Method for marking a textile thread with a fluorescent element, textile thread produced by the marking method, and use of said textile thread for weaving an item of clothing

Abstract

A method for marking a textile thread by a fluorescent element has the following successive steps: placing a textile thread and at least one fluorescent element in a reaction chamber, introducing a fluid into the reaction chamber, increasing the temperature and pressure in the reaction chamber up to a temperature and a pressure so as to transform the fluid into a supercritical fluid and to mark the textile thread by the fluorescent element. The fluorescent element is chosen from organolanthanide complexes.

1 - 17 . (canceled) 
     
     
         18 . Method for marking a textile thread by a fluorescent element comprising the following successive steps:
 placing a textile thread and at least one fluorescent element in a reaction chamber,   introducing a fluid into the reaction chamber,   increasing the temperature and pressure in the reaction chamber up to a temperature, higher than the critical temperature of the fluid, and up to a pressure, higher than the critical pressure of the fluid, so as to transform the fluid into a supercritical fluid and to mark the textile thread by the fluorescent element,   wherein the fluorescent element is chosen from organolanthanide complexes.   
     
     
         19 . Method according to  claim 18 , wherein the supercritical fluid introduced into the reaction chamber is liquid carbon dioxide. 
     
     
         20 . Method according to  claim 18 , wherein the textile thread comprises from 1% to 88.5% by weight of polyester. 
     
     
         21 . Method according to  claim 20 , wherein the polyester is ethylene polyterephtalate. 
     
     
         22 . Method according to  claim 18 , wherein the fluorescent element is a europium complex. 
     
     
         23 . Method according to  claim 18 , wherein the weight ratio between the textile thread and the fluorescent element is comprised between 1% and 20% by weight. 
     
     
         24 . Method according to  claim 18 , wherein the pressure and temperature are maintained during a period of at least 15 minutes. 
     
     
         25 . Method according to  claim 24 , wherein the pressure and temperature are maintained during a period comprised between 15 minutes and 10 hours. 
     
     
         26 . Method according to  claim 18 , wherein the pressure is comprised between 100 bars and 400 bars. 
     
     
         27 . Method according to  claim 26 , wherein the pressure is comprised between 300 bars and 350 bars. 
     
     
         28 . Method according to  claim 18 , wherein the temperature is comprised between 50° C. and 200° C. 
     
     
         29 . Method according to  claim 28 , wherein the temperature is comprised between 110° C. and 150° C. 
     
     
         30 . Method according to  claim 18 , wherein a solvent is placed in the reaction chamber before the fluid is introduced. 
     
     
         31 . Method according to  claim 18 , wherein several fluorescent elements are arranged in the reaction chamber. 
     
     
         32 . Textile thread, obtained by means of the method according to  claim 18 , said textile thread being marked by at least one fluorescent element chosen from organolanthanide complexes. 
     
     
         33 . Textile thread according to  claim 32 , wherein the thread comprises between 1% and 88.5% by weight of polyester. 
     
     
         34 . Textile thread according to  claim 32 , wherein the fluorescent element is a europium complex. 
     
     
         35 . Textile thread according to  claim 32 , wherein the textile thread is marked by several fluorescent elements. 
     
     
         36 . A method comprising:
 weaving at least part of an item of clothing with a textile thread according to  claim 32 .   
     
     
         37 . Item of clothing comprising at least one textile thread according to  claim 32 .