1. Extruder temperature set properly, especially the die and the resin temperature is too low, resulting in poor resin plastics, PE composite film of molten resin or a similar phenomenon occurs sharkskin fisheye-like scar.
2. Resin contains water, plasticizing condition resin.
3. Entering into the resin melt index or other resins with different densities, the resin plastics or plastics are not entirely bad.
4. Not thoroughly cleaned when changing the cartridge clean resin, other resins or impurities remaining in the cylinder adversely affect the resin plasticized condition.