What causes the Automotive Wiring Harness Protection Sleeve just out of the oven to change color and turn yellow?

The Automotive Wiring Harness Protection Sleeve has good aging resistance and yellowing resistance. In practical applications, the Automotive Wiring Harness Protection Sleeve will not change color and turn yellow after several years. But sometimes in production, it is occasionally found that the color of some newly released Automotive Wiring Harness Protection Sleeve is yellowish, as if it has been stored for a long time, and what is the reason for this phenomenon, the following editor will explain to you :

First of all, in terms of technology, when the Automotive Wiring Harness Protection Sleeve is being molded, if the mold temperature is too high or the vulcanization time is too long, the color of the Automotive Wiring Harness Protection Sleeve will turn yellow after molding. Therefore, during production, it is necessary to strictly control the temperature of the mold and the vulcanization time of the product; in addition, the color of transparent or lighter and brighter Cable Sleeve will turn yellow to some extent after secondary vulcanization , If the raw material is better, the yellowing will be less, and if the raw material is poor, the yellowing will be greater, which is difficult to avoid.
The second is the vulcanizing agent. According to the anti-yellowing performance, the vulcanizing agent is divided into ordinary type and anti-yellowing property. The ordinary type is naturally a vulcanizing agent that is not anti-yellowing. On the exposed Cable Sleeve, and those products that need to be exposed, have lighter and brighter colors, and have higher color requirements, it is best to use anti-yellow vulcanizing agents.
In addition, the poor quality of the raw material itself will also cause the Automotive Wiring Harness Protection Sleeve to turn yellow. Sometimes we obviously added anti-yellowing vulcanizing agent to the Cable Sleeve during the production process, but the formed Cable Sleeve still turns yellow. This may be due to the poor anti-yellowing performance of the raw material. Here From a professional point of view, the technical editor suggests that you go directly to refueling, hoping to help you.