There are two processing techniques caps: injection molding and die casting. As for raw resin, HDPE is one of the main materials for injected bottle caps. Many enterprises have the problem of impurities such as yellowish dots and black spots on the finish products. The problem of impurities in HDPE has a long history to be tracked since HDPE is easier to decompose.

According to the source of impurities, we suggest to proceed from three aspects:

1. Thorough cleaning when conduct colors and materials switch

2. Downtime maintenance to prevent resin decomposition

3. Apply Screw Purging Compound for effective cleaning and prevention

The above method can effectively improve the production efficiency of bottle cap processing enterprises, reduce the scrap rate, and reduce the overall cost of washing machines.

SANP Tech. provides special bottle cap purging compound which can effectively solve the carbide problem in the screw, barrel and hot runners. Let us know if you are interested.

Contact us at  +86 13539736806, or mail to: sanpchem01@163.com  if you want to know more.