What types of insulation materials are used in low voltage wires and cables?

Commonly used insulation materials for low-voltage cables include PVC (polyvinyl chloride), PE (polyethylene), XLPE (cross-linked polyethylene), EPDM (ethylene propylene rubber) and EPR (ethylene pluether).



Wires and cables insulation materials can be roughly divided into plastic insulation materials and rubber insulation materials. The characteristics of these two insulation materials are as follows:


Plastic insulated power cable:

The insulation layer is extruded plastic power cables, commonly used plastics are polyvinyl chloride, polyethylene and cross-linked polyethylene. Among them, polyethylene is still widely used in low-voltage cables due to its convenient process, good comprehensive mechanical and electrical properties, good flame retardant properties, and low cost. Polyethylene is used for cable insulation and outdoor cable sheathing due to its excellent electrical properties, moisture resistance, cold resistance and moderate mechanical properties, while cross-linked polyethylene is widely used for insulation cutoffs and outdoor cable sheathing due to its excellent electrical and mechanical properties. Insulation Materials.

PVC (polyvinyl chloride)

PVC is a common insulating material with good electrical properties, physical properties and chemical corrosion resistance. Its advantages include relatively low price, ease of processing and installation, as well as high insulation resistance and thermal stability. However, since PVC may release toxic gases, it may not be suitable in some places with special environmental requirements, such as buildings and hospitals with high internal air quality requirements.


PE (polyethylene)

PE is another common insulating material with high dielectric strength, good chemical stability and insulation properties. Its advantages include good flame retardancy, good scratch resistance, and long service life. However, compared with PVC, its heat resistance and low temperature resistance are slightly worse. Wires made of PE are mostly used in outdoor environments or places that do not require special insulation requirements.

XLPE (cross-linked polyethylene)

XLPE is a high-quality insulation material with high insulation resistance, high temperature resistance and wear resistance. Its advantages include good mechanical strength, low dielectric losses and good electrical properties. XLPE insulated wires are widely used in industrial fields and places where resistance to shear and mechanical stress is required. Compared with PVC and PE, XLPE has a higher cost, but is more outstanding in terms of quality and performance.


EPDM and EPR are rubber-based insulating materials with good heat resistance, weather resistance and chemical corrosion resistance. Their advantages include good flexibility, aging resistance and good electrical properties. EPDM and EPR are mainly used in wind power, solar power generation and other places where resistance to environmental stress is required.


The choice of which insulation material is better depends on the specific application scenario and requirements. Generally speaking, PVC is a commonly used and cost-effective insulating material suitable for general low-voltage wires. PE is suitable for outdoor environments and places with few special requirements. XLPE is suitable for occasions with high requirements on insulation performance and mechanical strength. EPDM and EPR are suitable for places with special environmental requirements or where resistance to environmental stress is required. Zhengzhou Jinshui Industrial Co., Ltd. News When choosing insulation materials, everyone should also consider factors such as cost, performance, safety, and environmental requirements to determine the most suitable material.