What causes the Automotive Wiring Harness Protection Sleeve cover to turn yellow

In the past, many people have responded to the reason why the Automotive Wiring Harness Protection Sleeve cover will turn yellow. Today, I will explain to you that the Automotive Wiring Harness Protection Sleeve cover will turn yellow at high temperature. The existing problem is that the transparent Automotive Wiring Harness Protection Sleeve cover that food needs to contact, after being placed under the high temperature of 200 ℃ for 4 hours, it turns yellow. What's the matter?

Using silicone high anti-yellowing vulcanizing agent C-15 may solve this problem. Generally, food-grade products have this requirement. To prevent yellowing after secondary sulfur addition, anti-yellow catalyst + anti-yellow agent must be used. Both are indispensable, but these two things will make the oil pressure production a bit sticky. Things to pay attention to, add 2-3 per thousand of hydrogen-containing Braided Sleeve according to the amount of silica gel, high-hydrogen-containing Braided Sleeve can solve the problem of yellowing, but the product may be a bit brittle and sticky to the mold, you can spray a layer of Braided Sleeve on the mold To solve the demoulding problem, otherwise, only platinum bridges are used.
Automotive Wiring Harness Protection Sleeve cover manufacturers analyze for you: Of course it is a good idea to use anti-yellowing agent and anti-yellowing vulcanizing agent. However, you need to pay attention to whether the car harness protective cover you are using is ideal, and you cannot add too much internal mold release agent, zinc stearate, so you need to communicate with the supplier to see if there is already a hydrogen-containing Braided Sleeve inside. To provide anti-yellowing effect, powder is very important, if the iron content in it is too high, it will definitely turn yellow.
You can experiment and compare the common vulcanizing agent (without anti-yellowing agent) with the vulcanizing agent with anti-yellowing agent. Be careful not to add zinc stearate internal mold release agent. If it still doesn't work, it is recommended that you change to other rubber or use platinum vulcanizing agent. If there is sulfur or sulfur carriers in the environment, it will also cause yellowing of the Automotive Wiring Harness Protection Sleeve.