The role of ACR processing aids in PVC processing is mainly reflected in promoting plasticization, improving melt properties, enhancing processing stability, optimizing product quality, and enhancing special process adaptability
1. Promote plasticization
ACR interacts with PVC molecular chains through polar groups, reducing inter particle friction, accelerating melt plasticization, shortening processing time (such as ACR-201, which reduces plasticization time by 40-60 seconds), and can lower plasticization temperature by 10-20 ℃ (for models containing carboxylic acid groups).
2. Optimize melt performance
Enhance melt strength: Long molecular chains form a physical cross-linked network, increasing melt strength by 300% (ACR-401), preventing extrusion melt rupture (such as shark skin phenomenon);
Improve fluidity: reduce melt viscosity by 10-15% and enhance filling efficiency at high shear rates.
3. Improve processing stability
Inhibit local overheating, raise the starting temperature of PVC thermal decomposition from 190 ℃ to 210 ℃, reduce melt temperature fluctuations, and reduce torque by 15-20% when combined with lubricants (ACR-530).
4. Improve product quality
Eliminating surface defects such as fish eyes and flow marks, significantly improving the smoothness (such as haze<3%, glossiness above 90%); Enhance impact toughness (5-10 times increase low-temperature notch impact strength) and weather resistance.
5. Support special processes
Foaming field: Improve the strength of the melt to make the foam pores uniform and dense;
Transparent product: matching PVC refractive index (ACR-Z30 haze<3%);
Medical field: Reduce precipitation (models containing carboxylic acid groups reduce HCl release by 60%).
Different models are suitable for specific processes: ACR-401 (extrusion/rolling) enhances melt strength, ACR-201 (injection/blow molding) optimizes flowability, ACR-530 balances lubrication system.
Post time: Jun-26-2025
