Polyolefin fiber

Abstract

The invention relates to a gel-spun fiber comprising a polyolefin polymer forming a fiber body, wherein a stabilizer is present inside the fiber body, characterized in that the amount of said stabilizer is between 0.001 and 10 parts by weight based on 100 parts by weight of the amount of the polyolefin polymer forming said fiber body and wherein said stabilizer is carbon black.

1 . A gel-spun fiber comprising a polyolefin polymer forming a fiber body, wherein a stabilizer is present inside the fiber body, characterized in that the amount of said stabilizer is between 0.001 and 10 parts by weight based on 100 parts by weight of the amount of the polyolefin polymer forming said fiber body and wherein said stabilizer is carbon black. 
     
     
         2 . The fiber of  claim 1  where said fiber is a monofilament, a ribbon, a strip or a tape. 
     
     
         3 . The fiber of  claim 1  having a tenacity of at least 1.5 N/tex. 
     
     
         4 . The fiber of  claim 1  having a tensile modulus of at least 50 N/tex. 
     
     
         5 . The fiber of  claim 1  having a titer between 0.1 dtex and 50 dtex, more preferably between 0.5 dtex and 20 dtex. 
     
     
         6 . The fiber of  claim 1  wherein the polyolefin is polypropylene or polyethylene. 
     
     
         7 . The fiber of  claim 1  wherein the polyolefin is ultrahigh molecular weight polyethylene (UHMWPE). 
     
     
         8 . The fiber of  claim 1  wherein the amount of carbon black is at least 0.1 parts by weight based on 100 parts by weight of the amount of the polyolefin polymer forming the fiber body. 
     
     
         9 . The fiber of  claim 1  wherein the amount of carbon black is at most 3 parts by weight based on 100 parts by weight of the amount of the polyolefin polymer forming the fiber body. 
     
     
         10 . The fiber of  claim 1  wherein the average particle size of carbon black as measured by ASTM D3849-07(2011) is at least 5 nm. 
     
     
         11 . The fiber of  claim 1  wherein the carbon-black has a BET-surface as measured by ASTM D6556-10 of at least 50 m 2 /g. 
     
     
         12 . A fiber comprising a polymer forming a fiber body, wherein a carbon black is present inside the fiber body, characterized in that said fiber has a tensile strength retention of at least 50% after UV light exposure for at least 2000 hours in accordance with the method described in ISO 4982-2. 
     
     
         13 . A fiber comprising a fiber body, said fiber body being manufactured from an ultrahigh molecular weight polyethylene (UHMWPE) having an initial intrinsic viscosity (IV) of at least 5 dl/g, said fiber body further comprising carbon black, wherein after exposing said fiber to UV light for at least 1400 hours in accordance with the method described in ISO 4982-2, the IV of the UHMWPE forming said fiber body is at least 60% of the initial IV of the UHMWPE used to manufacture said fiber body. 
     
     
         14 . A method of increasing the strength of a fiber, comprising the steps of:
 i. providing a fully drawn polymeric fiber comprising carbon black; and   ii. exposing said fiber to UV light for at least 2000 hours in accordance with the method described in ISO 4982-2.   
     
     
         15 . Architectural textiles, ropes, fishing lines and fishing nets, and cargo nets, straps, and restraints in shipping and aviation, gloves and protective apparel comprising the fiber of  claim 1 .