ADDITIVES | POLYMER FILMS
Above: Clariant’s AddWorks PKG 906 Circle supports recycling of polyolefin film manufacturing waste without compromising quality or efficiency
layer placed beneath a laser-transparent surface layer. The additives provide good contrast and allow high-speed marking. Clariant has also developed AddWorks PKG 906
Circle to improve recycling of polyolefin films. The company says that the addition of this polymer stabiliser allows producers to significantly increase reuse of waste materials in PP and PE films, recycling their own reground scrap without loss of performance or processing efficiency. It is particularly well-suited to BOPP manufacturing but is also applicable to cast and blown film processes. Using Clariant’s Circle additive, the reuse content of post-production waste in the final film can be increased by up to 30%. The additive also protects the resin so that film quality remains excellent with significant reduction of gel formation and prevention of additional yellowing at high line speeds. Clariant adds this polymer stabiliser is its first product to carry the ‘Circle’ designator, which it introduced to highlight solutions that have been specifically designed to deliver significant benefits to the re-use or recycle process.
Right: A candy wrapper manufactured using DuPont Dow Corning AMB-12235 combined slip and antiblock additive masterbatch
Synergistic additions DuPont Transportation & Advanced Polymers has developed Dow Corning AMB-12235 masterbatch for PE blown film, combining an antiblock agent with a compatible slip additive to improve film processing and improve consistency of quality. The combination is said to provide a synergistic effect that delivers a low coefficient of friction (COF) over an extended period of time. It is also said to help prevent migration to the film
34 COMPOUNDING WORLD | January 2020
surface, which can affect downstream operations, and reduce film blocking at cost-effective low loadings. The masterbatch is approved for food contact in Europe, the US and China. “This new technology advancement demonstrates our strong commitment to the success of the packaging industry by supplying innovative, silicone-based solutions that help customers achieve seamless throughput, high productivity and consistent quality,” says Christophe Paulo, Industrial and Consumer Strategic Marketer EMEA at DuPont. “It helps film makers avoid spending time and effort to calculate the right ratio of antiblock and slip additives by trial and error. It also streamlines handling, storage and management of additive inventories.” DuPont adds that its silicone-based slip additive helps lower the COF of blown film to reduce its resistance to sliding over itself or manufacturing rollers. This improved slip performance — which is stable over time and under high temperatures — contributes to increased production speed, uninterrupted throughput and uniform film quality. The masterbatch was formulated to ensure
compatibility between the antiblocking and slip additives and provide the best ratio of active ingredients. This fine-tuned formulation frees customers from determining which individual additives work well together, and at what loadings. The masterbatch is claimed to be highly efficient at low loadings of 4-6 wt%. Kafrit has developed antistatic additives with active ingredients from plant-derived ingredients. The new additives include AT 00U11 LD, which is a short or long-term antistatic masterbatch and is active at low humidity levels. AT 04139 LD and AT 04139 PP are also short and long-term antistatic masterbatches that function with PE and PP compatibility respectively. The additives are dual use in food
products and have no hazardous substance indication. In addition, the additives have good organoleptic properties, without after-odours, so are suitable for packaging odour absorbing food such as milk powder. Dosage in the sheet is not limited by food contact certifications and can be adjusted until the desired result is obtained, the company says. Film applications include preventing dust accumulation in films and air distribution
systems, shrink wrap packaging, twist film packaging, and easy handling and
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IMAGE: CLARIANT
IMAGE: DUPONT
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