Although biodegradable plastic pepper balls are environmentally safe and have no pollution to the environment, the manufacturing of biodegradable plastic pepper balls is not as easy as ordinary plastic pepper balls, because the thickness of biodegradable plastic products should not exceed 4mm in theory, but plastic pepper balls are spherical, and the thickness must exceed this value.

Therefore, in the process of manufacturing biodegradable plastic pepper balls, the shrinkage of plastic blank balls is a common problem. So what method is used to solve the shrinkage of biodegradable plastic pepper balls? The common method is to increase the glue inlet of the plastic pepper ball mold, which can solve the shrinkage problem of biodegradable plastic pepper balls. Another method is to modify degradable materials. Experiments show that adding 30% glass fiber to degradable plastics can improve the shrinkage of plastic blank pepper balls obviously.