The reasons and solutions of PP injection molding matte products

In industrial production, highlighter PP is a kind of widely used plastic material, which has the advantages of high gloss, beautiful appearance and so on. However, if the process parameters and material properties are not well understood during the injection process, it may result in a matte surface of the product. This not only affects the beauty of the product, but also has a negative impact on the quality of the product.

The key to solve this problem is to analyze the reason why PP injection molding produces matte products. From the material, equipment, process and other aspects of in-depth analysis, we found that the following factors may lead to highlighter PP injection molding matte products:

1. Improper temperature control: in the injection process, if the temperature is too high or too low, it may lead to matte product surface. Therefore, it is very important to accurately control the material temperature and die temperature.

2. Insufficient injection pressure: If the injection pressure is insufficient, the plastic will not fill the mold cavity adequately, resulting in matte product surface. Therefore, it is important to adjust the injection pressure to the proper range.

3. Injection molding speed is too fast: if injection molding speed is too fast, it will lead to the plastic can not be fully leveled, resulting in matte product surface. Therefore, reasonable adjustment of injection molding speed to the appropriate range is also very important.

To solve the above problems, we put forward the following solutions:

1. Precise control of material temperature and mold temperature: in the production process, to ensure that the material temperature and mold temperature control in an appropriate range. This can be achieved using sophisticated temperature controllers and thermometers.

2. Adjust the injection pressure to the appropriate range: Adjust the injection pressure according to the specific situation to ensure that the plastic can fully fill the mold cavity.

3. Reasonably adjust the injection molding speed to the appropriate range: Adjust the injection molding speed according to the specific situation to ensure that the plastic can fully level.

In order to verify the effectiveness of the above solution, we conducted an experiment. We applied the above measures to the actual production process, and found that the surface glossiness of the produced high-gloss PP products has been significantly improved, and the product quality has been guaranteed.