Melt-anisotropic aromatic polyester multifilament

Abstract

Provided is a melt-anisotropic aromatic polyester multifilament having excellent abrasion resistance. The melt-anisotropic aromatic polyester multifilament has a single fiber fineness from 10 to 80 dtex and comprises 3 to 10 wt % of a dimethylsilicone-series finishing agent applied on a fiber surface of the multifilament, based on the multifilament, the finishing agent containing a dimethylsilicone-series compound having a weight average molecular weight from 15000 to 40000.

What is claimed is: 
     
         1 . A melt-anisotropic aromatic polyester multifilament having a single fiber fineness from 10 to 80 dtex, the melt-anisotropic aromatic polyester multifilament comprising 3 to 10 wt % of a dimethylsilicone-series finishing agent applied on a fiber surface of the multifilament, based on the multifilament, the finishing agent containing a dimethylsilicone-series compound having a weight average molecular weight from 15000 to 40000. 
     
     
         2 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament has a tenacity of 20 cN/dtex or higher. 
     
     
         3 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament includes single fibers having an average fiber diameter from 30 to 85 μm. 
     
     
         4 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the dimethylsilicone-series finishing agent has a viscosity from 300 to 3000 mm 2 /s. 
     
     
         5 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament has an interfiber dynamic friction coefficient from 0.080 to 0.150. 
     
     
         6 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament has a single fiber fineness from 15 to 60 dtex. 
     
     
         7 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the finishing agent contains a dimethylsilicone-series compound having a weight average molecular weight from 20000 to 40000. 
     
     
         8 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament comprises 3 to 8 wt % of the dimethylsilicone-series finishing agent based on the multi filament. 
     
     
         9 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament includes single fibers having an average fiber diameter from 35 to 80 urn. 
     
     
         10 . The melt-anisotropic aromatic polyester multifilament according to  claim 1 , wherein the melt-anisotropic aromatic polyester multifilament has an interfiber dynamic friction coefficient from 0.085 to 0.140. 
     
     
         11 . A fiber structure comprising a melt-anisotropic aromatic polyester multifilament as recited in  claim 1  in at least a part of the fiber structure.