3. Extrusion process
The extrusion process of ultra high molecular weight polyethylene pipes is also critical to the intrinsic properties of the pipe. Ultrahigh molecular weight polyethylene pipes of different molecular weights have different processing extrusion temperatures.
The molecular weight is 250±500,000, and the temperature during plasticization is about 240 degrees. Too low, the surface of the pipe is smashed, the plasticization is not good; if it is too high, the pipe is good, but the degradation is added. The specific temperature of each material should be summarized by experience. For the same raw material, generally one mold should be adjusted to set a suitable temperature. Therefore, in order to produce high-quality ultra-high molecular weight polyethylene pipes, raw materials, molds, and processing technologies are the core of the three technologies.