INNOVATION | RECYCLING
Above: Fraunhofer LBF and
Brüggemann have collabo- rated to
develop new stabilisers for high-quality polyolefin recyclates
Tisan Engineering Plastics has developed
EcoStar plastics from recyclates to obtain high quality engineering plastics such as PA 6, PA 6.6, PP homopolymer and PP copolymer. The company says that EcoStar products are customised to offer ecologic and economic solutions for different markets. EcoStar recovers the most prevalent and valuable materials, often in multiple grades and colours. Tisan says modification of the plastics by
reprocessing with fillers, reinforcements and modifiers produces a substantial change in the properties of the base material to achieve good mechanical properties, high quality consistency and cost reductions. The grades are suitable for applica- tions in automotive, electric and electronics, home appliances, construction, industrial applications, defence, safety equipment, transportation, office furniture, sports and energy, says the company. Celanese has developed a number of engineer-
ing materials that contain a percentage of recycled resins as an environmentally-friendly alternative to prime resin grades. The company says that its sourcing and manufacturing process enable resins with high consistency and performance. These materials include PA, PP and PBT/PET which allow manufacturers in industries such as automotive, consumer appliances and electrical/electronics, to achieve recyclability goals while meeting perfor- mance requirements. In addition, Celanese Ecomid recycled PA 66 compounds contain high-quality recycled PA fibres and textiles for an environmen- tally-friendly alternative to standard grades. These compounds, given their sourcing and manufactur- ing process, provide high lot-to-lot consistency to customers, says the company. Improving the quality of materials with recycled content is helped not just by control of sourcing but also by developments in additives used to restore or improve properties. Fraunhofer LBF and
52 INJECTION WORLD | July/August 2020
Brüggemann in Germany have collaborated to develop new stabilisers to improve the properties of polyolefin recyclates. The stabilisers are claimed to be capable of reducing the effects of damage from the materials’ processing and use due to thermal oxidation and photo-oxidation that can prevent them from being recycled into high quality moulded products. “With its many years of comprehensive experi- ence in the field of polymer additives and its worldwide market penetration, Brüggemann is the right partner to bring our ideas for the upcycling of plastics to market quickly,” says Dr. Rudolf Pfaend- ner, Head of the Plastics Division at Fraunhofer LBF. Building on the work of Fraunhofer LBF, Brügge- mann will use its know-how and technical potential to optimise formulations. The company will adapt the stabilisers to the requirements of customers and markets, provide technical application advice and will take over large-scale production, quality assurance and worldwide marketing. Brüggemann traditionally focuses on high-per- formance additives for polyamides, including heat, processing and light stabilisers, process auxiliaries and modifiers. Marketed under the Bruggolen brand, the company says that these additives ensure processing efficiency, extended component service life and high quality under economically favourable conditions, in both injection moulding and extrusion. The company is currently going through significant expansion and its new, highly automated facility will also produce the new additives for polyolefin recycling. “We are very pleased to have entered into a
cooperation agreement with the Fraunhofer LBF to expand our portfolio of recycling additives to polyolefins,” says Dr. Klaus Bergmann, Head of Polymer Additives. “Ultimately, our goal is to signifi- cantly improve the quality of recyclates with the help of innovative additives, thereby making an important contribution to the upcycling of plastic waste.” Songwon has developed Songxtend 2721 to
enable recycled PP to be reused and achieve high durability in automotive applications. The company says that this high-performance stabilisation system improves the long-term heat stability of both vehicle-interior and under-the-hood recycled parts, extending their service life. Concentration levels can be adjusted to meet the long-term heat stability requirements of applications such as engine covers, cable ducts and battery housings, for example. As well as increasing durability, Songxtend 2721 helps to minimise the negative effect of acid residues from battery case recycling. Improved recyclability is also a goal of additives
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IMAGE: BRÜGGEMANN
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