Stains, Impurities, and Foreign Substances
The plastic material is impure or contaminated.
| 23.1 Causes | 23.2 Solutions |
|---|---|
| 23.1.1 Raw materials, pellets, or pigments are impure. | 23.2.1 Replace the raw materials, dyes, or pigments. |
| 23.1.2 The plastic has decomposed or deteriorated. | 23.2.2 Adjust the processing conditions to prevent material decomposition. |
| 23.1.3 The barrel and hopper are not clean. | 23.2.3 Clean the barrel, hopper, and feeding tube. |
| 23.1.4 Foreign substances mixed in during preheating. | 23.2.4 Prevent foreign substances from entering during drying or material storage. |