What are the Reasons for Poor Plasticization of Extrudates?

When the plastic extruder is working, various quality problems may appear. The poor plasticization of extrusion is one of them.

The poor plasticization of extruder extrudate features：
1. There are toad skin in the extrusion layer;
2. The surface of plastic is black, lusterless and has small cracks;
3. There is obvious seam in the extruding layer.

The causes of poor plasticization of extrudate in extruder：
1. The temperature control is too low, especially at the head part;
2. The insulating or sheathing material is mixed with other plastic particles with different properties;
3. If the screw turns too fast, the plastic can not be plasticized completely;
4. There are quality problems in plastics.

Solutions for poor plasticization of extruder extrudate:
1. Pay attention to the rationality of extrusion temperature control;
2. The quality and product name of the materials to be used shall be confirmed;
3. The extrusion speed can not be increased by blindly pursuing the output;
4. Strengthen the storage of raw materials, especially in the plastic drying process;
5. Reasonable die matching can enhance extrusion pressure and screw reflux.