ADDITIVES | RECYCLING


Above: StabiPlus from Repi protects rPET from yellowing during


mechanical recycling


duced the MaxiLoop range of compatibilisers, beginning with ten different formulations designed for various recycling applications. The additives are designed to allow increased recycled content by improving miscibility, processability and properties. One such use is in post-industrial recycling (PIR)


of edge trims from film extrusion in the production of multilayer products. Multilayer films made of PE or PP (non-polar polymers) may contain PA6, PA66, or EVOH (polar polymers) in a barrier layer. When the PIR edge trim is put back into the film extruder, the differences in polarity and in flow properties between the polymers can result in defects such as


streaks and gels in the film. MaxiLoop HP7AB- 4780COM compatibiliser masterbatch improves homogeneity during processing by increasing interfacial adhesion between the polymers, which leads to more stable processing conditions and higher product quality, especially in blown film production, according to Gabriel-Chemie. MaxiLoop EMA7AB4820MOD is another additive masterbatch designed for recycled polystyrene (rPS), a material which can have high dust formation, brittleness, and low impact resist- ance. Adding the compatibilising additive im- proves impact resistance and tensile strength. Evonik says that its range of Tego Cycle addi-


tives, introduced in May 2023, are designed to save energy during mechanical recycling and to improve the quality of recycled plastics. For washing, separation, deinking, and drying, the company’s antifoams and wetting agents help make processes more efficient. During compound- ing of recycled materials, additives that improve processing include dispersants and processing aids. Additives including compatibilisers and Tego Sorb malodour reducers improve product quality. Evonik points to its Circular Plastics Program as


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sales@jwell.cn


IMAGE: REPI


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