Difference between XLPE and XLPO materials in automotive cables

China [CN]

Material explanation: XLPE (cross-linked polyethylene) and XLPO (cross-linked polyolefin) are both commonly used insulating materials in automotive cables, each with unique characteristics and advantages.

Basic properties: XLPE (cross-linked polyethylene)

Structure: XLPE is a polyethylene molecule that is transformed from a linear structure to a mesh structure by chemical or physical methods, thereby improving its heat resistance and mechanical properties.

Density: The insulation specific gravity of XLPE is 1.2g/cm³, which is relatively light.

Electrical properties: XLPE has excellent electrical properties, low dielectric loss, and low capacitance, and is suitable for the insulation layer of various wires and cables.

Heat resistance: The long-term allowable operating temperature of XLPE can reach 90°C, and it can still maintain an elastic state at 130°C, and its interception capacity can be increased by about 25% compared to PVC insulated cables of the same cross-section.

Safety: XLPE does not contain halogens, so it will not decompose toxic gases at high temperatures and is relatively safe.

XLPO (cross-linked polyolefin): Structure: XLPO is similar to XLPE, and its performance is also improved by cross-linking reactions.

Application differences: Temperature grade: XLPE is suitable for relatively low temperature grade occasions, such as T3 or T4 (but more inclined to T3), while XLPO is more suitable for higher temperature grade occasions (such as T4).

Flexibility requirements: XLPO has more advantages in occasions where higher flexibility is required (such as places where the harness is bent).

Flame retardancy requirements: In occasions where flame retardancy is required, XLPO's halogen-free flame retardancy makes it more competitive.

Cost: XLPE has a relatively low price, so XLPE may be a more suitable choice when cost is limited. XLPO may be relatively expensive due to its excellent flame retardancy and flexibility.

XLPE and XLPO are both commonly used insulation materials in automotive cables, and they each have unique characteristics and advantages. When choosing, you should consider the specific application occasions, temperature grade, flexibility requirements, flame retardancy requirements, and cost. For more professional advice, you can consult cable manufacturers or experts in related fields.

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