Insulated communication wire

Abstract

An insulated communication wire comprising a conductive metal core wire and an insulative coating, which insulated communication wire may connect a computer with a peripheral device, and which insulated communication wire may be a data transmission cable or LAN cable.

What is claimed is: 
     
         1 . An insulated communication wire comprising a conductive metal core wire and an insulative coating. 
     
     
         2 . The insulated communication wire as claimed in  claim 1 , for connecting a computer with a peripheral device. 
     
     
         3 . The insulated communication wire as claimed in  claim 1 , which is a data transmission cable or LAN cable. 
     
     
         4 . The insulated communication wire as claimed in  claim 1 , wherein the conductive metal of the conductive metal core wire comprises copper or aluminum. 
     
     
         5 . The insulated communication wire as claimed in  claim 1 , wherein the core wire is selected from the group consisting of an AWG-46 solid copper wire, an AWG-26 solid copper wire, and AWG-24 solid copper wire and an AWG-22 solid copper wire. 
     
     
         6 . The insulated communication wire as claimed in  claim 1 , wherein the core wire of the conductive metal core wire has a diameter of 0.02 mm to 3 mm. 
     
     
         7 . The insulated communication wire as claimed in  claim 1 , wherein the insulative coating has a thickness of 1 mil to 20 mil. 
     
     
         8 . The insulated communication wire as claimed in  claim 1 , comprising a foamed layer disposed between the core wire and the insulative coating. 
     
     
         9 . The insulated communication wire as claimed in  claim 1 , wherein the insulative coating is arranged on the periphery of the core wire. 
     
     
         10 . The insulated communication wire as claimed in  claim 1 , wherein the insulative coating comprises a tetrafluoroethylene/hexafluoropropylene copolymer having a melt flow rate measured at 372° C. of 35.0 to 45.0 g/10 minutes and a die swell of −8.0% to 5.0%, and
 the sum of the numbers of —CF 2 H groups and unstable end groups being 120 or less per 1×10 6  carbon atoms, 
 wherein die swell is measured by extruding the copolymer maintained at 372° C.±0.5° C. through an orifice having a diameter of 1 mm under a load of 5000 g with a piston to obtain an extruded strand, allowing the extruded strand to cool to room temperature, measuring the diameter of the cooled strand at a portion 5+1 mm from a first extruded tip portion of the strand, obtaining an average of the diameters of three strands obtained in the same period, and calculating the die swell according to the following formula:
   die swell (%)=[( SD−OD )/ OD ]×100
 
 
 where SD: the diameter of strand (average of the diameters of three strands) and OD: the diameter of the orifice (1 mm). 
 
     
     
         11 . The insulated communication wire as claimed in  claim 10 , wherein the sum of the numbers of —CF 2 H groups and unstable end groups is 50 or less per 1×10 6  carbon atoms. 
     
     
         12 . The insulated communication wire as claimed in  claim 10 , wherein the die swell is −6.0% to 4.9%. 
     
     
         13 . The insulated communication wire as claimed in  claim 10 , wherein the sum of the numbers of —CF 2 H groups and unstable end groups is 20 or less per 1×10 6  carbon atoms. 
     
     
         14 . The insulated communication wire as claimed in  claim 10 , wherein the tetrafluoroethylene/hexafluoropropylene copolymer has a heating weight loss of 0.1% by weight or less after heating at 372° C. for 30 minutes. 
     
     
         15 . The insulated communication wire as claimed in  claim 10 , wherein the tetrafluoroethylene/hexafluoropropylene copolymer has a melting point of 245° C. to 280° C., and
 wherein the melting point is determined as being a temperature corresponding to a peak obtained by measurement using a differential scanning calorimeter at a temperature rise rate of 10° C./min. 
 
     
     
         16 . The insulated communication wire as claimed in  claim 10 , wherein the tetrafluoroethylene/hexafluoropropylene copolymer comprises a polymerized unit derived from tetrafluoroethylene, a polymerized unit derived from hexafluoropropylene, and a polymerized unit derived from a perfluoro(alkyl vinyl ether). 
     
     
         17 . The insulated communication wire as claimed in  claim 10 , wherein the perfluoro(alkyl vinyl ether) is perfluoro(propyl vinyl ether).