The central role of the drying process in the production of PET masterbatches

The role of drying in the preparation of PET masterbatches

Drying is an indispensable step in the preparation of PET masterbatches, and its role is mainly reflected in the following aspects:

Remove moisture and prevent hydrolysis

PET resin in the melt extrusion process, if it contains high water, it is easy to hydrolyze, resulting in resin degradation, affecting the mechanical properties and thermal stability of the product. Drying can effectively remove the moisture in the material, prevent the occurrence of hydrolysis reaction, and ensure the quality of PET masterbatches.

Improve extrusion efficiency

During the extrusion process, the evaporation of water in the material containing water will lead to the increase of extruder screw load, energy consumption, and may even lead to screw wear. After drying, the material has low water content, the extrusion process is smoother and the production efficiency is improved.

Improve the dispersion of color masterbatches

During the drying process, the water in the material is removed and the pigments and additives are more evenly dispersed in the resin. Good dispersion helps to improve the coloring effect and color stability of the masterbatches, making the color of plastic products more bright and uniform.

Extend the shelf life of products

After drying, PET masterbatches have low water content, are not easy to absorb moisture, and can maintain stable performance for a long time. This is especially important for masterbatches that need to be stored for a long time.

Improve product quality

The drying process not only removes water, but also helps to remove volatile matter and impurities in the material, improving the purity and quality of the product. PET masterbatches with high purity can better perform the coloring effect in plastic products and improve the overall quality of the products.