Waterproof wire harnesses are widely used electrical components that are involved in modern vehicles and machines such as cars, aircraft and ships to protect wires from damage in harsh environments such as wet, wet, immersed or rain. The material of the harness is crucial to its durability.

Common waterproof wire harnesses include plastic materials such as polypropylene (PP) and polyvinyl chloride (PVC). These materials differ in their performance in terms of water resistance, durability, corrosion resistance, etc. The following is a detailed analysis of the impact of different materials on the durability of waterproof wiring harnesses.

1. Polypropylene (PP)

Polypropylene is a transparent, smooth, odorless and non-toxic polymer material. It has good water resistance, solvent resistance, oil resistance, high temperature resistance and chemical resistance. In addition, polypropylene can obtain different properties by changing its processing process, such as increasing adhesion, improving thermal stability and improving wear resistance.

Polypropylene's good water and chemical resistance make it an excellent material for harsh environments. At the same time, its flexibility and wear resistance also allow the harness to withstand various mechanical stresses. In addition, polypropylene wire harnesses have good UV and antioxidant properties and can be used in the sun for a long time. Therefore, polypropylene wire harnesses are suitable for automobiles, aircraft, ships and other applications requiring long-term durability and environmental corrosion resistance.

2. Polyvinyl chloride (PVC)

Polyvinyl chloride is a common plastic material, with good softness, durability and chemical properties, widely used in wire harnesses and insulation materials. However, PVC has a certain deterioration and is easily damaged by external environmental factors, such as ultraviolet light, ozone, etc., resulting in changes in its color, strength, hardness and toughness. In addition, for the application of high temperature, high pressure, high frequency environment, PVC performance is also insufficient.

The excellent flexibility and wear resistance of PVC facilitates the harness to withstand different operating conditions under mechanical stress. However, in fast situations and harsh environments, the durability of PVC will be significantly reduced, so it is not suitable for equipment that requires long-term unattended operation.

3. Nylon (PA)

Nylon is a high temperature, high strength, high elastic polymer material, its heat resistance and wear resistance is also very good. The wire harness made of nylon material can be used for long-term operation under high temperature and high pressure conditions. However, it is less flexible, so it is not suitable for tight Spaces where bending is required.

In summary, the choice of wire harness material has a crucial impact on its durability. Due to its excellent waterproof, chemical, wear-resistant and anti-ultraviolet properties, polypropylene wire harness is suitable for the harsh environment of long-term unattended operation of automobiles, aircraft, ships, etc. PVC wire harnesses are suitable for general applications, but durability can be affected in fast and harsh environments; Nylon harness is suitable for applications in high temperature and high pressure environments. Therefore, it is necessary to carefully consider the use of the environment before selecting the wire harness material to meet the practical application requirements.