What are the protection methods for rubber aging?silicone bibs uk Factory

　　Rubber is different from synthetic rubber and silicone rubber products. Because the aging of rubber is a complex comprehensive chemical reaction process, and it is impossible to absolutely prevent rubber aging, appropriate measures can be taken to delay the speed of rubber aging, so as to achieve extended The purpose of rubber life. Anti-aging measures mainly include physical protection and chemical protection.

　　The physical protection method refers to avoiding the interaction between rubber and various aging factors as much as possible, such as using surface layer or treatment, adding light shielding agent, adding paraffin, etc.

　　The chemical protection method refers to adding certain substances to prevent or delay the aging of rubber, such as adding amine or phenolic chemical antioxidants.

　　What are the combined effects of antioxidants?

　　In order to improve the protective effect, in practical applications, two or more antioxidants with different mechanisms of action are often used in combination, or antioxidants with the same protective mechanism are used in combination, or groups that act on the same molecule according to different mechanisms are used. There are three kinds of anti-aging agents that exist at the same time, and the effects are as follows:

　　1. The antagonistic effect means that when two or more antioxidants are used together, the effect produced is less than the sum of the effects when they are used alone. Studies have shown that when an acidic antioxidant and an alkaline antioxidant are used in combination, they will produce a complex similar to salt, resulting in an antagonistic effect.

　　Carbon black has both inhibitory and pro-oxidative effects in rubber. In the presence of chain-breaking antioxidants, the inhibitory effect of carbon black is reduced, or the protective effect of antioxidants is reduced in the presence of carbon black. It is clear that It shows that there is a confrontational effect between them.

　　2. The effect of adding grass means that the protective effect produced by the combined use of antioxidants is equal to the sum of their respective use. When choosing an antioxidant and using it together, it is the basic requirement to produce the effect of adding grass. The combined use of the same type of anti-aging agent usually only produces the effect of adding grass, but sometimes other benefits can be obtained after combined use. For example, the combined use of two phenolic antioxidants with different volatilities can not only produce the addition effect, but also exert the inhibitory effect in a wider temperature range than the same amount of a single antioxidant.

　　3. Synergistic effect means that the combined effect of antioxidants is greater than the sum of the effects of each antioxidant used alone.

Read recommendations:

Low-carbon life, start from me! Silicone water filter basket, a good helper for home,silicone plate

Foldable water bottle

Little bird molar teether

pacifier chain gold

baby car pacifier clip Manufacturing