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ACR (acrylic ester) processing aids play an important role in PVC processing, and they are usually polymers polymerized from acrylic esters. These processing aids can be divided into two types based on their molecular weight: high molecular weight and low molecular weight, each with different characteristics and advantages in performance and application.

High molecular weight ACR processing aids
Features and advantages
Enhance melt strength:
High molecular weight ACR processing aids, due to their longer molecular chains, can significantly improve the strength and elasticity of PVC melt. This is very important for improving the load-bearing capacity and deformation recovery ability of the melt during the processing.
Increase melt viscosity:
High molecular weight additives can increase the viscosity of PVC melt, making the melt more stable during processing, and reducing flow marks and surface defects caused by excessive fluidity.
Improving melt uniformity:
By improving the uniformity of the melt, high molecular weight ACR additives can help produce high-quality PVC products, reduce internal defects and bubbles, and improve the mechanical properties of the products.
Enhanced impact resistance:
High molecular weight additives can significantly improve the impact resistance of PVC products, making them less prone to breakage or damage under external forces. They are suitable for applications that require high impact resistance, such as PVC pipes and profiles.