The shell of foamed plastic pepper ball is made by plastic foaming technology, but the strength of foamed plastic pepper ball shell is reduced, and it is easy to crack and break. How to increase the density of foamed plastic pepper ball shell without affecting the density of plastic floating ball? The technology of strengthening foamed plastic floating ball is explained in detail below.The technology of chemical foaming is usually used for the shell of foamed plastic pepper ball. The principle of chemical foaming is to add chemical foaming agent, which will react chemically at high temperature to generate gas, and this part of the climate will remain in the plastic ball to form the shell of foamed plastic pepper ball. However, the disadvantage of chemical foaming agent is that it will destroy the molecular structure in the plastic during the foaming process, resulting in the reduction of the strength of plastic. When the proportion of foaming agent is more than 1%, Will significantly reduce the strength of plastic, so the use of chemical foaming agent is the main reason for the strength reduction of foamed plastic pepper ball shell. In order to solve the strength problem of foamed plastic pepper ball shell, it can be well solved by changing chemical foaming agent into physical foaming agent. The advantage of physical foaming agent is that the foaming process will not damage the plastic material itself and has limited influence on the strength of foamed plastic pepper ball shell, so using physical foaming agent is an effective method to solve the strength problem of foamed plastic pepper ball shell.