Problems | Suggested Solutions |
| Pitting or Foaming | Further drying is required |
| Rough Appearance | Check that proper screw is installed |
| Too Glossy | Reduce screw speed Reduce barrel temperature Check that proper screw is installed |
| Surging | Reduce screw speed Eliminate screw cooling |
| Dimensional Variation | Reduce screw speed |
| Black specks, Burning | Check temperatures Check quality and material of construction for surfaces in contact with melt Check for streamlined, low inventory die/adapter Clean out all burned or foreign material from die, adapter, and extruder Check that proper screw is installed |
| Poor Impact and Physical Properties | Check stock temperatures Check that melt is well fused |
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