Material performance requirements for automotive rubber seals

1. What are the basic properties of seals?

The basic properties of automotive rubber sealing strips include controllable sealing performance requirements such as hardness performance, tensile performance, strength performance, tear elongation and compression set. According to industry standards, automotive seal manufacturers need to provide supply status data and hot air aging data for these properties. According to the use state, the temperature of the hot air aging test is generally 70°C.

2. What is the resistance to ozone aging and atmospheric aging?

The automobile is in an all-weather state for a long time, so the rubber seals are required to have good ozone aging resistance and atmospheric aging resistance.

1. Ozone aging resistance: ozone aging is a technology that uses environmental simulation to accelerate the process of rubber aging by ozone in view of the characteristics of rubber being sensitive to ozone, so as to test the aging resistance of rubber products.

2. Air oven aging refers to the change of the properties of materials under the action of hot air over time.

3. Natural ageing: Various changes caused by long-term exposure of polymer materials to outdoor conditions, also known as atmospheric aging.

3. What is the paint resistance?

The automotive rubber seal is directly installed on the car body, in direct contact with the paint board of the car body, and the free substances in the paint will interact with the rubber seal, thereby accelerating the aging of the rubber seal, so the paint resistance is one of the conventional properties of the sealing material.

4. What are the standards for the low temperature performance of seals?

Automotive seals are generally used at temperatures ranging from -40°C to 70°C, so they are required to have good low temperature resistance. Brittleness temperature index of the sealing material of the sealing strip.