There are many uniform bubbles in the middle of the PMMA plastic pepper ball for ornaments, which looks beautiful. It is difficult to realize the manufacturing process of the plastic pepper ball with uniform bubbles in the middle through mold design and the adjustment of injection molding machine parameters. The process of producing the PMMA plastic pepper ball with uniform bubbles in the middle can only be produced through the plastic foaming process.

The foaming technology of plastic pepper balls is different from other plastic foaming technologies. Plastic pepper balls are round and have thick glue positions, and the glue positions of ordinary plastic products are relatively thin. Therefore, the foaming agent used for foaming plastic pepper balls is a special foaming agent, which is a physical foaming agent. The advantage of physical foaming is that the number and size of foaming are relatively uniform, and the requirements for machines are not high. Therefore, the foaming technology of PMMA plastic pepper balls is made by foaming with physical agents.