The strength of pepper balls has always been a problem in the industry. So what methods can be used to solve this problem? The latest plastic micro foaming technology actually used can solve the strength problem in pepper balls. The emergence of plastic foaming technology will also increase the production cost of pepper balls. The main reason for the high strength of the pepper ball is that during the molding process of the pepper ball shell, the material melts at high temperature and enters the mold to produce some gas. When this part of gas enters the inside of the pepper shell, bubbles will form. Add a certain proportion of foamed Liu to the pepper ball shell material. When the shell material melts into the mold cavity at high temperature, there will be evenly distributed micropores inside the shell of the pepper ball. Of course, these micropores are invisible to the naked eye. That is to say, because of these micropores, the gas generated by the shell of the pepper ball during the injection molding process will fill these micropores. Therefore, after the gas is absorbed by the foaming micropores, the middle bubble of the pepper ball will disappear.