PA plastic pepper balls will become low in strength and toughness due to the change of environment, and some of them will crack or break. The main reason for this defect is the influence of environment on materials. How to improve this defect is to adjust the humidity of materials according to experience.

Humidity control of PA plastic pepper balls and PA plastic hollow pepper balls is a common method to improve the toughness of PA plastic pepper balls. There are two kinds of humidity control processes: steam wet method and natural wet method. The steam wet method of PA plastic pepper balls has the advantage of high efficiency, which can basically reach the required strength in 5 hours, while the natural wet method takes about 10 days to complete. It is the most economical and practical method to improve the strength and toughness of PA plastic pepper balls and PA plastic hollow pepper balls by temperature regulation.