Scorch is a serious problem in the production of rubber products. Scorch refers to the phenomenon that rubber products in the process of processing, due to high temperature or too long time exposure to heat sources, resulting in changes in the chemical composition of rubber, so that its properties are damaged. This phenomenon may lead to a decline in the quality of the product, or even unusable. This paper will explain in detail the definition of rubber products burning, influencing factors and preventive measures.
First, what is burnt rubber products?
Scorch is a common defect in the production of rubber products. It mainly refers to the phenomenon that rubber products in the processing process, due to high temperature or too long time exposure to heat sources, resulting in changes in the chemical composition of rubber, so that its properties are damaged. The occurrence of coke will make the physical properties of rubber products significantly decreased, such as tensile strength, elasticity, aging resistance, etc., will be seriously affected.
Second, the factors affecting the burning of rubber products and their principles
Coke burning is mainly affected by the following factors:
1. Temperature: Temperature is the most important factor of scorch. When rubber products are exposed to high temperatures, rubber molecules begin to oxidize and gradually degrade. The higher the temperature, the greater the risk of scorch.
2. Time: The exposure time of rubber products at high temperatures is also an important factor in scorch. The longer the time, the greater the chance that the rubber molecules will oxidize, and the higher the risk of scorch.
3. Rubber type: Different types of rubber have different heat resistance properties. Some synthetic rubbers have poor heat resistance, so they are more prone to scorch.
4. Compounding agents: Some compounding agents will reduce the heat resistance of rubber, making it more prone to scorch.
The principle of scorch is mainly the oxidation reaction of rubber molecules. When rubber products are exposed to high temperatures, rubber molecules react with oxygen to form free radicals. These free radicals will cause the rubber molecules to further oxidize, degrade into small molecules, and eventually lead to scorch.
Preventive measures and methods for burning rubber products
The main measures to prevent the burning of rubber products are as follows:
1. Control temperature: In the production process, the temperature of rubber products should be strictly controlled. Try to avoid high temperatures and prolonged exposure to heat sources.
2. Shorten the time: shorten the residence time of rubber products at high temperature as much as possible. For example, pipelining can be used to move products quickly through high-temperature areas.
3. Choose rubber with good heat resistance: When making rubber products, try to choose rubber with good heat resistance.
4. Optimize the compounding agent: try to choose the compounding agent that has less influence on the heat resistance, or optimize it.
5. Add anti-coke agent: Adding an appropriate amount of anti-coke agent to the formula of rubber products can effectively improve the heat resistance of rubber and prevent the occurrence of scorch.
In short, understanding the causes of burning rubber products and preventive measures is of great significance for improving product quality and production efficiency. In the actual production process, targeted preventive measures should be taken according to the specific situation to ensure product quality and smooth production.