PI-filled 50% graphite material has the following characteristics in glass machinery: PI-CA50 uses PI polyimide as a substrate and has lower thermal conductivity than graphite. It is 50-100 times lower than graphite products, which can effectively reduce the number of cracks in glass products. In the working environment, there will inevitably be environments such as oil and water. The PI-CA50 products absorb 28 times less oil than graphite products in the 24-hour soaking test. The size is more stable, reducing the number of shutdowns and maintenance times. The most important high-temperature resistance is that it can meet the contact with the bottle body in a short time, and is mainly used in key components such as bottle mouth clamps and sandwich cores.