Causes of Undesirable Size Changes in Kevlar Braided Sleeve

Manufacturers of Kevlar Braided Sleeve have a headache when it comes to the causes of poor dimensional changes in Special Material Braided Sleeve products. How to stabilize the size of Kevlar Braided Sleeve requires first understanding the causes of defective dimensions.

1. Causes of adverse size changes in extruded Kevlar Braided Sleeve
① Thickness of mouth plate. The expansion rate is large when the thickness is small, and the expansion rate is small when the thickness is large;
②The temperature of the machine head and mouth. The expansion rate is small when the temperature is high, and the expansion rate is large when the temperature is low;
③Extrusion speed. The extrusion rate is fast and the expansion rate is large. On the contrary, the expansion rate is small.
④Plasticity. If the plasticity is small, the expansion rate is large; if the plasticity is large, the expansion rate is large;
⑤ Glue content. The higher the glue content, the greater the expansion rate, and vice versa;
⑥The Special Material Braided Sleeve has high temperature and small expansion, and vice versa;
⑦ The Special Material Braided Sleeve molecules contain branched functional groups such as benzene rings and butyl groups, which have a large expansion rate. For example, the expansion rates of styrene-butadiene rubber, chloroprene rubber and butyl rubber are greater than those of butadiene rubber and natural rubber.
⑧The shorter the parking time of Special Material Braided Sleeve, the greater the expansion rate after use.
2. Other reasons for poor size changes of Kevlar Braided Sleeve
The problem of poor size changes in Kevlar Braided Sleeve is relatively easy to solve. First determine the formula and process, then measure the size, and then adjust the mold according to the size. If the mold size is not good, it is useless for you to adjust the recipe. Nowadays, many Special Material Braided Sleeve factories have a relatively single analysis problem, which should be comprehensively considered from the aspects of people, machines, materials, environment, methods and measurement.
If the production process is the same and the cutting weight is the same, but the size is still unstable, the problem of the Special Material Braided Sleeve itself should be considered. The sizes of Kevlar Braided Sleeve in different batches are different. If the same batch is left for too long, it will also affect the size of the product, and at the same time control the rubber mixing process of Special Material Braided Sleeve, because the length of rubber mixing time and different processes will cause size changes.