A method for manufacturing a steel wire material for reinforcing an optical fiber is proposed. In this method, a steel wire is firstly subjected to a chemical conversion treatment. The wire is then drawn with a reduction of area of 30% or more.
As a result, a coating capable of effectively restraining the production of hydrogen is formed on the surface of the wire. The present invention relates to a method for manufacturing a steel wire material for reinforcing an optical fiber, the material having on the surface thereof a coating capable of effectively preventing the production of hydrogen.
As a reinforcing material for an optical fiber, steel wire materials such as steel wire or strand and organic high-molecular fibers are used. Among them, since steel wire materials are inexpensive and have a high strength and high rigidity, theyare widely used.
| Size(mm) | Tensile strength（mpa） |
| 0.80—3.50 | 340--550 |
| Size（mm） | Coil size | Spool packing | Big coil packing | |
| ID （mm） | OD （mm） | |||
| 0.80—1.60 | 14、16 cun | 1—100㎏ axis | 250-400 | 400-770 |
| 1.61—3.50 | 450 | 800 | ||
| 508 | 840 | |||
| Size mm | Min. zinc coating （g/㎡） | |
| A1 | B2 | |
| 〉0.80-1.00 | 150 | 120 |
| 〉1.00-1.20 | 180 | 150 |
| 〉1.20-1.40 | 200 | 150 |
| 〉1.40-1.60 | 220 | 150 |
| 〉1.60-1.80 | 220 | 180 |
| 〉1.80-2.20 | 240 | 190 |
| 〉2.20-2.50 | 260 | 210 |
| 〉2.50-3.00 | 275 | 240 |
