A preparation method of low-smoke halogen-free polyolefin insulated and shielded cable
An insulating shielding and polyolefin technology, which is applied in the field of preparing low-smoke halogen-free polyolefin insulating and shielding cables, can solve the problems of high temperature resistance, large amount of cables, toxic substances, etc., and achieves good tensile and bending resistance, insulation shielding Good performance, the effect of shielding electromagnetic interference
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[0019] refer to figure 1 , a low-smoke halogen-free polyolefin insulated and shielded cable of the present invention, comprising a conductive core 1, an isolation guide layer 2, an insulating sheath layer 3, a shielding sheath layer 4, and an outer protective sheath layer 5. The low-smoke The preparation method of the halogen-free polyolefin insulated and shielded cable comprises the following steps:
[0020] Step 1: Wire drawing process, using multiple copper wires with a diameter of 1.0mm to draw a 0.3mm single copper wire;
[0021] Step 2: Beaming process, use DCSS-550 beaming machine to cut 20mm 2 The stranded structure is 624 0.3mm copper wire monofilaments stranded, the stranded pitch is controlled at about 30mm, the stranded direction is leftward, the stranded wire diameter is controlled to 2.15±0.05mm, and 6 strands are stranded to make a conductive wire share;
[0022] Step 3: re-twisting process, using JB-500 / 6 tubular stranding machine to twist six conductive wir...
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