Band-shaped lubricating material for dry wiredrawing and process for producing same

Abstract

Provided is an innovative belt-shaped lubricating material for dry wiredrawing which not only can be used under severe wiredrawing processing conditions such as those of high temperature/high pressure/high speed as well as conventional powdered or granular lubricants for dry wiredrawing but also can cope with diameter reduction to a wide range of wire diameters ranging from a small diameter to a large diameter and a wide range of linear speeds ranging from a low speed to a high speed, has excellent functionalities such as lubricity, followability, spreadability, adhesiveness, heat resistance, processability, workability, safety, durability and productivity irrespective of a processed shape, is effective in improving work environments and is friendly to the global environment. The belt-shaped lubricating material for dry wiredrawing includes a film containing 10 to 90% by weight of a metal salt of a saturated fatty acid and 10 to 90% by weight of a thermoplastic resin.

1 . A belt-shaped lubricating material for dry wiredrawing comprising:
 a film containing 10 to 90% by weight of a metal salt of a saturated fatty acid and 10 to 90% by weight of a thermoplastic resin.   
     
     
         2 . The belt-shaped lubricating material for dry wiredrawing according to  claim 1 , wherein the saturated fatty acid is butyric acid, caproic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, montanoic acid and/or melissic acid. 
     
     
         3 . The belt-shaped lubricating material for dry wiredrawing according to  claim 1 , wherein the thermoplastic resin is polyethylene, polypropylene, polystyrene, an acrylonitrile/styrene copolymer resin, an acrylonitrile/butadiene/styrene copolymer resin, an ethylene/vinyl acetate copolymer resin, a methacryl resin, polyvinyl chloride, polyamide, polyacetal, polyethylene terephthalate, polybutylene terephthalate, polymethylpentene, polycarbonate, polyphenylene sulfide, polyetheretherketone, polytetrafluoroethylene, polyetherimide, polyarylate, polysulphone, polyethersulfone and/or polyamideimide. 
     
     
         4 . The belt-shaped lubricating material for dry wiredrawing according to  claim 1 , wherein the metal salt is a lithium salt, a sodium salt, a potassium salt, a calcium salt, a magnesium salt, an aluminum salt, a zinc salt, a barium salt and/or a composite metal salt thereof. 
     
     
         5 . The belt-shaped lubricating material for dry wiredrawing according to  claim 1 , comprising boric acid, a boric acid salt, a phosphoric acid salt, a sulfuric acid salt, a carbonic acid salt, a nitric acid salt, slaked lime, titanium oxide, talc, mica, graphite, molybdenum disulfide, a layered double hydroxide and/or sulfur. 
     
     
         6 . A method for production of a belt-shaped lubricating material for dry wiredrawing comprising:
 heating and kneading 10 to 90% by weight of a metal salt of a saturated fatty acid and 10 to 90% by weight of a thermoplastic resin to prepare a mixture,   forming the mixture into a film, and   forming the film into a belt shape.   
     
     
         7 . A wiredrawing method comprising:
 covering a base material to be subjected to a wiredrawing treatment with the belt-shaped lubricating material for dry wiredrawing according to  claim 1 , and   passing the base material through a hole of a die and continuously pulling out the base material therefrom to be reduced in diameter, in order to perform wiredrawing.   
     
     
         8 . The wiredrawing method according to  claim 7 , wherein the base material is wound with or held by the belt-shaped lubricating material for dry wiredrawing to cover the base material. 
     
     
         9 . The wiredrawing method according to  claim 7 , wherein the belt-shaped lubricating material for dry wiredrawing is guided by a roller and wound around the base material to cover the base material. 
     
     
         10 . The wiredrawing method according to  claim 7 , wherein the base material is made of a metal.