additives | Odour and emissions
Above: BYK Additives’s BYK-P 4200 additive uses a chemical combination to dissolve VOCs from raw materials during compounding
in response to the adoption last year by the European Commission of its Circular Economy Package, which includes new targets for reduction of waste and outlines a long-term path for waste management and recycling. The company says its new black masterbatch Rec-O- Black 216 and innovative additive masterbatch odour scavenger 1000258-E were both developed to support its customers in converting recycled materials into new value added products.
Rec-O-Black 216 is made from more than 95%
recovered post-consumer feedstocks (recycled polyethylene carrier resin and carbon black pigment recovered from post-consumer recycling of rubber products like tyres). It is claimed to be a cost effective masterbatch with very good opacity. Rec-O-Black 216 can be used in combination with 1000258-E, which Ampacet describes as a powerful wide-spectrum odour absorbing masterbatch that neutralises odour from post-consumer recycled material and keeps it enclosed in the polymer. Meanwhile, Polyfil Corporation has introduced a line of odour neutralising concentrates (ONCs) for use in active packaging applications. The company says that, in addition to odour elimination during processing, the concentrates are engineered to neutralise or absorb odours during the use of the final product by reacting with volatiles, specifically hydrogen sulphide, mercap- tans, and amine based molecules. The technology is said to work on a molecular-scale via adsorption, absorption and gas solubility without use of masking agents. ONC products can be used in plasticised PVC, polyolefins, polyamide 6, phosphite and thioester modified compounds, as well as compounds for automotive applications. “Polyfil’s ONC family of products are non-toxic, main-
30 COMPOUNDING WORLD | January 2017
taining a natural and environmentally safe formulation effective for organic and inorganic odour-causing molecules,” says Polyfil Market Development Manager Russ Bradley. “Also, they can be used to improve recycled materials imparting a lasting odour neutralis- ing effects.”
Adding fragrance
Another odour management solution is available from UK company Addmaster in the form of its Scentmaster range of highly concentrated fragrance, flavour and deodorising masterbatches. The company says the technology can be applied to a wide variety of polymers and applications, including use in multi-sensory education products designed to stimulate children with learning disabilities, pleasant scented parts for use in washrooms, and perfumed polymers in packaging designed to entice consumers. The company says that while adding scent to
polymers is not in itself a particularly new technology, standard production techniques often produced poor results because the fragrances and flavours could easily be destroyed by the high temperatures required during polymer processing. However, recent advances mean that scents can now be supplied in a masterbatch format that ensures the fragrance is protected, allowing it to remain fresh and stable. Scent technology can also eradicate offensive smells with deodorising technology. In such applications, the scent is tailored to confuse the human nose so it identifies the pleasant components instead of the offensive malodour. Addmaster says Scentmaster can be supplied in high
concentration masterbatches, meaning that typical addition rates are 1% or lower. It claims that almost any flavour or fragrance can be matched or designed to
www.compoundingworld.com
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