What issues should be noted when extruding low smoke and halogen-free PVC cables?

What issues should be noted when extruding low smoke and halogen-free PVC cables?

When extruding low smoke and halogen-free PVC cable materials, the following points should be noted: 
① During production, the temperature of the extruder should be strictly controlled. Generally, the temperature should be maintained between 170 and 180℃, with the die at around 190℃ and the barrel at approximately 200℃. If the temperature is too high, the aluminum hydroxide or magnesium hydroxide in the material may decompose, resulting in an uneven surface of the cable and affecting its performance. If the temperature is too low, the shear force will be too large, the extrusion pressure will be high, and the surface of the cable will not be good. 
② When extruding and coating, it is advisable to use a die with a tube extrusion type. When matching the die, there should be a certain degree of stretching. During extrusion, the die core should be 1 to 3 mm behind the die sleeve. 
③ The extrusion speed must not be too fast, generally it should be controlled between 7 and 12 meters per minute. If the speed is too fast, the shear force will be too large and the temperature will be difficult to control.
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