How to Choose the Right Processing Aid for PVC Foamed Products

In PVC low-foamed product manufacturing, selecting the optimal processing aid is critical—it directly impacts product quality, performance, and efficiency. One of the most overlooked yet decisive factors in this selection? Product thickness!

Let's explore how to select suitable PVC low-foamed product regulators based on product thickness.

Thin Foamed Boards: Flowability and Uniform Cell Structure are Key

Thin foamed boards have unique requirements for processing aids due to their thinness. During the forming process, the material needs to have good flowability to quickly and evenly fill the mold. At the same time, a lower melt strength is required to ensure the formation and stability of the cells.

For the production of thin foamed boards, it is advisable to select a PVC foaming regulator with fast plastication and slightly lower melt strength.

Like KRT-100,KRT-530 etc, This type of regulator acts like an efficient "catalyst," accelerating the melting and plastication of PVC materials. It allows the material to quickly reach the ideal processing state, improves its flowability, and ensures uniform filling of all parts of the mold. Moreover, the appropriate melt strength maintained by the regulator ensures uniform and dense cells, avoiding oversized or unevenly distributed cells.

In actual production, selecting the right foaming regulator can significantly enhance the production efficiency of thin foamed boards and drastically reduce the defect rate. The resulting product will have a smooth and flat surface, with a uniform cell structure, leading to improved appearance and physical properties.

Thick Foamed Boards: High Melt Strength is Essential

Unlike thin foamed boards, thick foamed boards face more challenges during the foaming process due to their greater thickness. They require higher melt strength to prevent cell collapse and merging, ensuring the quality and performance of the product.

For thick foamed boards, a foaming regulator with high melt strength is recommended. like HF-901,HF-90, HF-PA70/60 etc,This regulator acts like a strong "armor," significantly enhancing the melt strength of PVC materials. During foaming, it allows the bubble nuclei to expand in a controlled and orderly manner. This prevents cell merging and gas overflow, forming uniform small bubbles. As a result, the product density is reduced, and its mechanical properties are improved.

Recommended Products

Products such as KRT-901,KRT-90which have high melt strength, are ideal choices for the production of thick foamed boards. These products have been tested by the market and actual production, meeting the high melt strength requirements of thick foamed boards and ensuring stable and reliable product quality.

I hope this sharing provides a reference for everyone. If you have any questions about pvc processing aid selection or pvc foamed or WPC production, feel free to leave a comment and let's explore the production secrets of PVC foamed products together.