Common Materials For Automotive Wiring Harness Seals

The car wiring harness is known as the "vessel" of a car and is generally considered to be the central nervous system of a car, which connects the on-board computer with various related functions on the vehicle. Whether the manufacturing technology of automotive wiring harness is advanced is an important aspect that affects the performance of automobiles.

When the automobile wiring harness is through the hole, the seal is generally used for the transition to play the role of wear resistance, waterproofing, sealing, etc. The design of the Single Wire Seal has great influence on the overall performance of the automobile wiring harness, and the design also has many difficulties, mainly distributed in the following Location: engine and cab interface, front and cab interface, four-door and compartment interface, fuel tank inlet. There are three common materials for automotive wire harness seals:

One, neoprene. Its characteristics are good resistance to ozone, heat aging, oil resistance, etc., and it is flame retardant and self-extinguishing; but its low temperature resistance is not good.

Second, natural rubber. The characteristics of the wire harness material are good elasticity and mechanical strength, excellent flex resistance, high tear strength and good cold resistance. Disadvantages: The aging resistance is not good, it is not resistant to oil and ozone, and it is flammable.

Third, Silicone Connector Seal . Heat resistance, cold resistance and weather resistance are good; the disadvantage is that it is not resistant to oil. The characteristics of EPDM: weather resistance, ozone resistance, heat resistance, corrosion resistance, acid and alkali resistance, etc., and high strength and high expansion ratio; Disadvantages: poor adhesion, and no natural elasticity Good rubber and poor oil resistance.

Four, EPDM. It is also the most important common material for wire harnesses. Many automotive wire harness seals use it, which has good comprehensive performance and strong adaptability.