Analysis of the causes and solutions of frosting caused by Automotive Wiring Harness Protection Sleeve

Frosting of Automotive Wiring Harness Protection Sleeve is caused by various reasons. For the Automotive Wiring Harness Protection Sleeve that has been bloomed, only by analyzing the cause of the frost can it be effectively dealt with.

1. Frosting caused by lack of sulfur in the protective sleeve of the Automotive Wiring Harness Protection Sleeve.

Improve the vulcanization process or strengthen the formula vulcanization system.

2. Frosting caused by improper storage conditions.

It can be avoided by conducting different comparative tests on storage temperature, time, humidity, etc., and adopting appropriate storage conditions.

3. Frosting caused by fluctuations in the quality of raw materials.

Conduct comparative tests on different batches of raw materials and different origins. Then change the batch and origin of raw materials.

4. Frosting caused by improper process operation.

Accurately weigh the compounding ingredients to avoid mis-match, over-match, under-match, missing mix, etc. During operation, strictly follow the process to avoid uneven mixing of Braided Sleeve and excessive roller temperature.

Generally, wipe off the frost spray, soak it in solvent for 4 to 6 hours, take it out and dry it in the shade, and pack it into a bag. But it is necessary to improve the Braided Sleeve formula to fundamentally solve it.

The blooming caused by the aging of the protective sleeve of the Automotive Wiring Harness Protection Sleeve can only be solved by improving the kneading uniformity of the Braided Sleeve and adjusting the formula. When NR is re-milled, sulfur is added at the end, and sulfur for NBR is often added at the beginning of mixing, and the accelerator is added last. The cause of blooming is mainly the solubility and compatibility of sulfur in the Braided Sleeve. Therefore, controlling the content of soluble sulfur in insoluble sulfur is the key to overcome blooming, and the conversion of insoluble sulfur is related to time and temperature. The probability of frost blooming in summer is greater than that in winter. According to the analysis, summer is hot, the air humidity is high, process temperature control is difficult, and the cooling of the mixed rubber is not good, which prolongs the heating process and causes more insoluble sulfur to be converted into soluble sulfur; the test It shows that PVC film is beneficial to reduce blooming, and has a great effect on protecting the surface cleanliness and adhesion of the cord.