Precision PP hollow balls are sealing components for mechanical products to prevent liquid leakage. The materials used are usually rubber and plastic, while the commonly used plastic hollow balls are PP hollow balls and PE hollow balls

PP hollow ball is a type of plastic hollow ball, which represents the commonly used specialized sealed PP hollow ball. It can also be said to be a general term for plastic hollow balls. However, this term is used in the new national standard, Japan, and Taiwan standards. Compared to the old national standard, it is generally referred to as PE hollow ball to represent sealed plastic hollow balls.

The representative models of PP hollow balls include 6.35mm, 8mm, 9mm, 10mm, 11mm, and 12mm. They are mainly used in the automotive, electrical, and aviation fields, with a wide range of applications.

PP hollow balls are classified according to precision: there is a difference between G0 level and G1 level.

The accuracy of G1 grade PP hollow balls is within ± 0.025mm. The accuracy of G0 grade PP hollow balls is 0.01mm. Generally, the manufacturing difficulty and cost of G0 grade PP hollow balls are high, so the price is more than twice that of G1 grade.

The manufacturing process of PP hollow balls can be divided into two types: one is blow molding, which produces PP hollow balls with low strength, poor accuracy, and uneven wall thickness. It is often used in situations where precision and strength are not required.

Another type is laser welding technology manufacturing, which produces PP hollow balls with high strength and accuracy. The wall thickness of the hollow balls can be designed according to needs. After being polished by a dedicated grinding machine, the accuracy of the PP hollow balls manufactured by this technology can reach G0 level ± 0.01mm. Therefore, industries that require the quality of PP hollow balls will choose hollow balls manufactured by laser welding technology.