Method for producing fibers having a low surface energy and fibers, yarns and textiles having a low surface energy

Abstract

The present invention relates to a method for producing a low surface energy fiber having a long-term liquid repellency and anti-stain effect. The present invention relates to an addition of a specific ratio of low surface energy additives to a thermoplastic polymer used as a spinning raw material, which is subjected to spinning processing procedure, such as melting spinning, to produce fibers with a surface tension of between 25˜72 dyne/cm.

1 . A method for producing fibers having a low surface energy comprising
 step (i): formulating a thermoplastic polymer containing 0.1 wt %˜30 wt % of a low surface energy additive; and one of the following steps:   step (ii-a): subjecting the thermoplastic polymer as a spinning raw material to conduct melt spinning, followed by drawing and false twist processing to produce fibers with a surface tension of between 25˜72 dyne/cm;   step (ii-b): subjecting the thermoplastic polymer as a spinning raw material to conduct melt spinning, drawing and setting to produce a fully drawn yarn (FDY) with a surface tension of between 25˜72 dyne/cm; or   step (ii-c): subjecting the thermoplastic polymer as a spinning raw material to conduct melt spinning, multi-stage drawing and setting to produce a high tenacity yarn (HTY) with a surface tension of between 25˜72 dyne/cm.   
     
     
         2 . The method according to  claim 1 , wherein a thermoplastic polymer containing 0.1 wt %˜30 wt % of a low surface energy additive is obtained by adding 0.1 wt %˜30 wt %, based on the total amount of monomers, of the low surface energy additive to the monomers and carrying out polymerization using monomers. 
     
     
         3 . The method according to  claim 1 , wherein a thermoplastic polymer containing 0.1 wt %˜30 wt % of a low surface energy additive is obtained by blending thermoplastic polymer particles containing 1˜60 wt % of a low surface energy additive with thermoplastic polymer particles free of a low surface energy additive in such a manner that the concentration of the low surface energy additive is 0.1˜30 wt % after blending. 
     
     
         4 . The method according to  claim 1 , wherein the low surface energy additive is a fluorine-series additive. 
     
     
         5 . The method according to  claim 1 , wherein the fibers formed by melt spinning have a circle, a non-circle or composite cross section. 
     
     
         6 . The method according to  claim 1 , wherein the melt spinning is selected from mono spinning or composite spinning. 
     
     
         7 . The method according to  claim 1 , wherein dyed fibers are produced by dope dyeing or piece-dyeing. 
     
     
         8 . The method according to  claim 1 , wherein the thermoplastic polymer is selected from polyesters, polyamides or polyolefins. 
     
     
         9 . The method according to  claim 8 , wherein the polyesters are selected from the group consisting of polybutylene succinate (PBS), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), cationic dyeable polyester, recycled PET, BioPET and polylactic acid (PLA). 
     
     
         10 . The method according to  claim 8 , wherein the polyamides are selected from the group consisting of nylon 6, nylon 66 and nylon 46. 
     
     
         11 . The method according to  claim 8 , wherein the polyolefins are selected from the group consisting of PE and PP. 
     
     
         12 . The method according to  claim 1 , wherein the fibers produced by drawing are partially oriented yarns (POY) or high oriented yarns (HOY). 
     
     
         13 . The method according to  claim 1 , wherein the false twist processing is false twist (DTY) processing or air false twist (ATY) processing. 
     
     
         14 . A fiber having a low surface energy, which is produced by the method according to  claim 1 . 
     
     
         15 . A yarn having a low surface energy, which is solely composed of the fibers having a low surface energy according to  claim 14  or is formed by compositing the fibers having a low surface energy according to  claim 14  with other fibers. 
     
     
         16 . A textile, which comprises a fiber having a low surface energy according to  claim 14 . 
     
     
         17 . A textile, which essentially consists of yarns having a low surface energy according to  claim 15 .