The braiding process of PE fishing line places extremely high demands on equipment precision and process control. The fineness of PE fiber is usually between 200D and 3000D. The fiber surface is smooth with a low friction coefficient, making tension control the biggest technical challenge during the braiding process. Before braiding, PE raw yarn needs to undergo preheating treatment, typically heating the fiber to 60-80°C to reduce residual stress inside the fiber and improve conformability during braiding. The preheating temperature control accuracy needs to be maintained within ±2°C, otherwise the braided line body will exhibit inconsistent tightness.
The braiding process uses a multi-spindle cross-braiding process, commonly available in 4-strand, 8-strand, 12-strand, and 16-strand specifications. The braiding angle is a key parameter affecting line body performance, usually controlled between 30°-45°. Too small an angle will make the line body too stiff, affecting casting distance; too large an angle will reduce the knot strength of the line body. During braiding, the tension of each PE fiber needs to be precisely controlled within the range of 0.8-1.5N, and the tension difference between spindles must not exceed 5%. This requires the braiding machine to be equipped with a high-precision closed-loop tension control system and real-time tension monitoring device.
After braiding is complete, the PE line also needs to undergo post-processing procedures, including heat setting, surface coating, and winding packaging. The heat setting temperature is usually between 120-140°C, with time controlled at 30-60 seconds, aimed at eliminating internal stress generated during the braiding process and stabilizing the line body structure. Surface coatings vary depending on the application—freshwater fishing typically uses polyurethane coating to improve wear resistance, while saltwater fishing uses fluorocarbon coating to enhance salt spray corrosion resistance. The entire process also has strict requirements for temperature and humidity environment; workshop temperature should be maintained at 20-25°C, and relative humidity controlled at 50-60%RH.