1. The raw materials are of poor quality;
2. The injection molding process temperature is too high;
3. The baking time is too long;
4. The cooling and heat dissipation of the nylon tie mold during the production process does not meet the requirements;
5. Post-heat treatment is not timely and excessive;
6. Natural oxidation is caused by the storage period of the product;
7. The water evaporates.
2. The injection molding process temperature is too high;
3. The baking time is too long;
4. The cooling and heat dissipation of the nylon tie mold during the production process does not meet the requirements;
5. Post-heat treatment is not timely and excessive;
6. Natural oxidation is caused by the storage period of the product;
7. The water evaporates.
