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Why do rubber products age?

Update:25-06-2021
Summary:

First of all, what is aging, and what are the manifesta […]

First of all, what is aging, and what are the manifestations of aging? The specific performance is softening, hardening, stickiness, etc., for example, tires will crack after a long time, which is also a performance of aging, and for example, the product has not been used for a long time before it is stretched and impact resistant. It is the decline of the physical and chemical properties of rubber products, which is called rubber aging.
What is the reason? In detail, as a rubber product, it may come into contact with oily, corrosive and other liquids. It may also be used as a shock-absorbing and cushioning seal, or tires, etc., or it may be used. To come into contact with bacteria and other microorganisms. It can be seen that due to its excellent performance and economy, it is used in a variety of environments, which also causes its easy aging, which can be summarized into three factors: physics, chemistry, and biology.

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