1. The product is too dry; <br>2. The drying time of the raw material is too long; <br>3. The injection temperature is too high; <br>4 The chemical composition of the raw material is unqualified;
1. The product is too dry;<br>2. Raw material drying time is too long;<br>3. Injection molding temperature is too high;<br>4 the chemical composition of raw materials is not qualified;
1. The product is too dry;<br>2. The drying time of raw materials is too long;<br>3. The injection temperature is too high;<br>4. Unqualified chemical composition of raw materials;