PA pepper balls need to have a small specific gravity in applications, but sometimes they must also have a certain strength. For example, if they are used in liquids that need a little pressure, they must have a certain strength, otherwise the PA pepper balls will be deformed under pressure. The solution to this contradiction is generally to modify the materials of PA pepper balls with glass fibers. The modified PA pepper balls can meet the needs of customers in both buoyancy and strength.

The glass fiber modification of PA pepper balls requires that the glass fiber addition ratio should be below 20%. If this ratio is exceeded, the specific gravity of PA pepper balls will be too large, and the effect of floating on liquid will not be achieved. Therefore, the glass fiber modification of PA pepper balls requires high technical standards, and few plastic hollow ball manufacturers produce PA pepper balls reinforced with glass fiber.