Reasons for layering and peeling of PVC pipe fittings: mixed with other incompatible polymers; too much release agent is used during molding; the melt temperature in the cavity is too low; too much moisture; the gate and the runner have sharp edges Angle; resin temperature inconsistent. Improvement method: The material avoids incompatible impurities or contaminated recycled materials mixed into the raw material; the mold design chamfers all runners or gates with sharp angles to achieve smooth transition; process conditions a. Increase the barrel and Mold temperature b. Dry the material properly before molding c. Avoid using too much mold release agent.
