MATERIALS | PVC ADDITIVES
Above: Recent innovations from Norac include “booster” products to alleviate tin stabiliser supply shortages
with different PVC recycle streams,” Ala said. Another notable trend she highlights is weight
saving. “By incorporating new additives designed for lightweighting and density reduction, PVC manufacturers can enhance the value proposition of their products for customers, while also reducing their environmental impact. Additionally, reducing the weight of PVC products can help to lower freight costs and improve product performance, making it an attractive option for manufacturers looking to meet sustainability goals.” Ala adds that new solutions are required for
recycling PVC, however, including addressing the demand and supply imbalance, developing additives to mitigate the challenges of variability in PVC recycle streams, and investigating ways to improve the compatibility of different plastic types. Additionally, she identifies a need for industry players to address misinformation about PVC and to advocate for PVC in a changing regulatory and environmental landscape.
Targeting recycling One of the main current technical areas of interest is improving the process for recycling PVC and being able to incorporate different recycle streams to achieve consistent quality. “At Dow, we are addressing this issue through the use of our innovative Surecel and Paraloid acrylic additives,” said Ala. “These additives can improve the rheol- ogy, melt strength, and processability of recycled materials, which facilitates meeting density reduc- tion targets comparable to virgin material. By aiding our customers’ incorporation of recycled materials into their products, we are not only making a contribution towards sustainability, but also reducing costs and increasing efficiency in the PVC manufacturing process.” Dow’s Surecel processing aids are said to enable
improved efficiency and high-quality cell structure at any thickness in foam applications. The company says the latest addition to the range, Surecel 488, is designed with a tailored ultra-high molecular weight to reach a high efficiency of foaming, allowing for lightweighting and improved cell structure. It, and the pre-existing Surecel 467 grade, provide density reductions in various PVC foam applications – sheet, deck, and pipe. They contribute to improved melt strength and cell structure when extruding product containing various levels of in-house scrap, post-industrial scrap generated during production in the same or external PVC applications, and post-consumer PVC recycle generated after consumer use. Demand for durable and sustainable materials in outdoor living spaces also continues to rise and Dow has a number of solutions to meet the needs
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IMAGE: NORAC ADDITIVES
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