What are the benefits of using processing AIDS in plastic production?
2021-11-26
Some processing AIDS will be used in plastic production. What are the benefits of using processing AIDS in plastic production?
Methacrylate polymers can enhance the rolling properties of PE. Alkyl methacrylate processing AIDS with higher alkyl carbon numbers improve the melt strength of polypropylene and facilitate thermoforming operations in the manufacture of containers and electrical enclosures. Methacrylate processing AIDS with lower molecular weight can act as rheological modifiers in ABS resin to reduce melt viscosity and make melt easier to process. Adding ultra-low concentration of fluorocarbon processing AIDS to extruded LLDPE film can not only reduce melt viscosity but also eliminate melt rupture. Due to its high strength and barrier properties, polyvinylidene chloride (PVDC) resins are commonly used in packaging applications, especially for multilayer films and sheets. However, PVDC is significantly less stable than PVC, and PVDC usually degrades rapidly at the necessary processing temperature. Acrylic additives reduce thermal degradation while retaining most of its important properties. Polyvinyl alcohol (PVOH) is another thermoplastic with good barrier properties, but it has very poor machinability at high temperatures and under shear stress conditions.
Therefore, the use of high molecular weight polymers as processing AIDS in PVOH enables smooth melt processing without reducing the rigidity and barrier properties of PVOH. The melt strength and melt viscosity of aromatic polyesters such as polyethylene terephthalate (PET) can be significantly improved by adding low concentrations of processing AIDS.
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