PVC should be added with 1% to 5% of processing aids for PVC resin during processing. ACR is the most widely used
Processing Aid. It is used in the main processing methods of PVC such as extrusion, injection molding, blow molding, blistering and calendering. Got an extremely wide range of applications. For the mechanism of action of ACR as a processing aid modified PVC, the general view is that ACR adheres to PVC resin particles through a long molecular chain, and transfers external heat and shear force to the resin to promote melting and plasticization. It reduces the temperature of the processing process, improves the melt strength, and improves the appearance quality of the product without reducing the rigidity of the rigid polyvinyl chloride.
1. It has good compatibility with PVC, good dispersibility, and is entangled with PVC molecular chain to promote PVC melt plasticization, effectively reduce the melt processing temperature of PVC, and improve the weather resistance of the product on the basis of small energy saving. ;
2, can change the melt rheological behavior of PVC material, improve the fluidity of PVC material, so that it is easier to form and extrude, ensuring the stability of long-term processing and molding;
3, can improve the melt strength of PVC materials, avoid melt fracture, can solve surface problems such as shark skin, improve the intrinsic quality and surface gloss of the product;
4. It can effectively prevent pressure fluctuations and flow flaws caused by extrusion during extrusion and injection molding, and effectively avoid surface problems such as ripples and zebra crossings;
5, can improve the surface gloss of the product, due to uniform plasticization, and at the same time can help improve the tensile properties, impact strength, elongation at break and other mechanical properties of the product;
6, can significantly reduce the deposition of various additives on PVC products such as stabilizers, pigments, calcium powder and other products on the surface of the product.
7. The foaming regulator can effectively adjust the cell density and size, and can greatly increase the melt strength of the PVC material, thereby effectively encapsulating the foaming gas, forming a uniform honeycomb structure, preventing gas from escaping, and reducing the density of the product;
8. Good metal stripping property, because it is a polymer material, it does not cause precipitation and the like as a lubricant.
9. Improve the consistency of the quality of PVC products, such as appearance gloss, tensile strength, impact strength and elongation at break, etc.
10. Effectively prevent surface defects such as silver filaments from being generated due to pressure fluctuations and flow flaws caused by extrusion during extrusion and injection molding.
11. Significantly reduce the deposition of various additive components such as stabilizers, pigments, etc. on the surface of processing machinery.
