Recycling of Fluoropolymer Cable

Alfa Chemistry Fluoropolymers provides various types of fluoroplastic cable recycling services. In the production of wires and cables, commonly used fluoroplastics include polytetrafluoroethylene, polyperfluoroethylene propylene, polyvinylidene fluoride, tetrafluoroethylene and ethylene copolymers, etc., to make various heat-resistant and high-temperature insulated wires, testing (oil) well cables, geological exploration cables, heating cables, F-class and H-class motor lead wires, radiation-resistant wires, electromagnetic wires, radio frequency coaxial cables, type A cables for flame-retardant cables for coal mines, etc.

Three common forms of solid-core fluoroplastic cables we recycle

• Recycling of single-core cable (or called high-temperature wire)

Its structure is that the inner conductor is a single or multiple copper wire (tinned copper wire), the outer diameter of the conductor is 0.4 ~ 2.0 mm, the insulation is fluoroplastic, and the thickness of the insulation layer is 0.3 ~ 0.5 mm. It is often used as aviation wire, wiring of electronic and electrical equipment, and lighting wires for special occasions.

• Recycling of coaxial cable

The inner conductor is single or multi-stranded copper wire (tinned copper silver copper wire), with a diameter of 1.25 ~ 1.6 mm. There are three types of insulation, including fluoroplastic insulation with a thickness of 0.5 ~ 0.7 mm, fluoroplastic foaming Insulation with a thickness of 2.5 ~ 3.0 mm, fluoroplastics and polyethylene combined insulation with the thickness of fluoroplastics of 0.04 ~ 0.07 mm, whose inner layer is insulated with fluoroplastics and outer layer is insulated with polyethylene. This type of cable is often used as a connection line for radio frequency cables and electronic equipment.

• Recycling of multi-core cable

Twist single-core wires or coaxial cables together to facilitate multi-core cables. Among them, there are twisted and non-twisted ones, which are used for industrial computer control and automation instrument control respectively. For special occasions, category 5E (cat 5e) cable, data transmission, audio and video transmission, etc., fluoroplastic is also used.

Fluoroplastic cable wire recycling product processing technology

The insulating materials used for fluoroplastic insulated wires mainly include PTFE, PTFE, FEP, and other fluoroplastics. According to the processing characteristics of different fluoroplastics, the following three processing techniques are generally used.

• Hot extrusion process

When the temperature of the internal barrel of the extruder reaches about 350 °C ~ 390 °C, add F46 fluoroplastic to the hopper, and use the thrust of the screw rotation to coat the conductive wire core uniformly and continuously through the molding die, and cool forming. This method uses Φ30, Φ60, Φ90 and other high-temperature plastic extruders to produce F46, F40 and other fluoroplastic insulation products.

• Pushing process

The powdery PTFE plastic is pre-compressed into a cylindrical shape, placed in the barrel, and the piston thrust is used to coat the conductive wire core uniformly and continuously through a molding die, and then sintered at a high temperature of 380 °C, and then shaped after cooling. This method uses F4 pusher to produce F4 (PTFE) type products.

• Winding process

The PTFE film tape cut into a certain width is wrapped around the wire core, and then sintered and shaped. This method uses a wrapping machine and a sintering furnace, and usually produces AFR type, FSFB type and other wires.

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