Materials and properties of cable sheath

Update:Sep 22,2022
Summary:1. Polyvinyl chloride (PVC) PVC is a cheap and soft material. By adding various materials, it can have heat resistance and oil resistance. The biggest...
1. Polyvinyl chloride (PVC)
PVC is a cheap and soft material. By adding various materials, it can have heat resistance and oil resistance. The biggest feature is flame retardant, so it is widely used in fire protection applications.
PVC is one of the largest plastic products in the world. It is cheap and widely used. Polyvinyl chloride resin is white or light yellow powder. Different additives can be added according to different uses, and PVC plastics can exhibit different physical and mechanical properties. Adding an appropriate amount of plasticizer to PVC resin can make a variety of hard, soft and transparent products. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foam materials, sealing materials, fibers, etc.
2. Polyethylene (PE)
PE is a thermoplastic resin obtained by polymerization of ethylene. It does not contain halogen substances and is an "environmentally friendly" material. PE is odorless, non-toxic, feels like wax, has excellent low temperature resistance (minimum operating temperature can reach -100~-70°C), good chemical stability, and can resist the erosion of most acids and alkalis (not resistant to oxidation properties). acid). It is insoluble in common solvents at room temperature, with low water absorption and excellent electrical insulation. But the texture is harder and the price is more expensive than PVC. By adding other substances, it can have a wide range of properties like PVC.
3. Rubber
Rubber refers to a highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under the action of a small external force, and can return to its original shape after removing the external force. . However, it is more expensive and heavier than PVC, and in the field of FA, its usage is gradually decreasing.
The types of rubber include natural rubber (NR), neoprene rubber (CR) with excellent environmental properties, and ethylene-propylene rubber (EPM) with excellent heat resistance.
4. Silicone rubber (Si)
Si is a highly active adsorbent material. The main component of silica gel is silicon dioxide, which is chemically stable and non-flammable. It has the characteristics of high temperature resistance, cold resistance, corrosion resistance, good electrical insulation and good water resistance, and is generally used to make advanced insulating materials and waterproof materials. The disadvantage is that the strength is low and the price is high.
5. Polyurethane (PU)
PU is an emerging organic polymer material, known as the "fifth largest plastic", and is widely used in many fields of the national economy due to its excellent performance. Product application fields involve light industry, chemical industry, electronics, textiles, medical treatment, construction, building materials, automobiles, national defense, aerospace, aviation, etc. It is also widely used in flexible cables, which have better friction properties than PVC but are expensive.