Zero plastics to landfill increases the need to mechanical recycling of plastics. This also applies to flame retardant plastics which are increasingly formulated with halogen-free flame retardants. According to EU regulations, plastic waste recycling is to increase in quality, and recycling rates should continue to rise: the EU target for 2020 is 70 percent.
The Fraunhofer Institute for Structural Durability and System Reliability LBF in Darmstadt/Germany has therefore launched a new research project on the recycling of halogen-free flame retardant plastics. For the first time, the project will provide answers to the recyclability of halogen-free flame retardant plastics.
In Europe, around 70 percent halogen-free PIN flame retardants based on phosphorus (P), inorganic substances (I) and nitrogen (N) are already in use. Their share will grow as they meet the requirement of many users for good environmental compatibility, cost efficiency and reliable flame proofing in the final application.
So far very little is known about the mechanical recycling of these plastics although, with an estimated value of three billion euros, they are very important economically in the European market. This concerns mainly the electrical and electronics industry, construction and transportation. The results of the project are significant for polymer, flame retardant and additive manufacturers, compounders, masterbatch producers, producers of plastic parts, recycling companies and consulting firms.
For the first time, the new multi-year research project of the Fraunhofer LBF will provide answers to the recyclability of halogen-free flame retardant plastics and suggest ways to ensure recyclability. At the same time it will make an important contribution to the socio-political issues of resource efficiency and security.
The research will be carried out as part of the project funding Industrial Community Research of the AiF (German Federation of Industrial Research Associations, here Forschungsgesellschaft Kunststoffe e.V., www.fgkunststoffe.de) and with the participation of member companies of PINFA. PINFA (Phosphorus, Inorganic & Nitrogen Flame Retardants Association, www.pinfa.org) represents manufacturers and users of halogen-free flame retardants and is part of the European Chemical Industry Council (Cefic).
The companies concerned will benefit from the new research project in many ways. They will be better able to use their own product waste in the case of flame-retardant formulations and to save costs. The findings will lead to enhanced quality products with high safety standards, potential hazards of degradation products will be identified and can be eliminated. Competitive advantages will continue to exist for using recycled plastics as a marketing tool and for constructing new products based on them.
Companies will be able to implement results immediately
As the institute draws on application-relevant and current commercial formulations, interested companies will be able to implement the findings immediately and directly. The ability to reuse production waste using the knowledge gained will generate a definite competitive edge. When using recyclates, it will be possible to minimize risks such as product liability based on the data compiled.
Due to the targeted mechanical recovery of recycled halogen-free plastics, the research project will reduce the use of raw materials and contribute to conserving and using resources more efficiently. Thanks to the improved properties of recycled plastics, such as the mechanical characteristics, it will be possible to open up new applications for these recyclates and build up new business areas.
With a market volume in Europe of three billion euros for halogen-free flame-retardant plastics, the Fraunhofer LBF estimates the potential cost saving due to using production waste at 150 million euros per year. The potential value for used plastics is significantly higher.
Recycling additives play an important part in quality improvement in the mechanical recycling of plastics. With the addition of customized stabilizers, compatibilizers and reactive additives, recycled materials achieve qualities that can compete with those of new material.
The number of recyclate additives has increased considerably in recent years. The difficulty arising from this for producers is how to develop the best solution technically and economically for the desired property profile. This is where the Fraunhofer LBF with its plastics division is available as a neutral partner that is continuously extending its knowledge of recyclates.
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About Fraunhofer LBF’s plastics research Division:
Fraunhofer LBF’s plastics research division, which evolved out of the German Plastics Institute (Deutsches Kunststoff-Institut DKI), provides its customers with advice and support along the entire added value chain from polymer synthesis to the material, its processing and product design through to the qualification and verification of complex safety-critical lightweight construction systems. The research division specializes in the management of complete development processes and advises its customers at all stages of development. High-performance thermoplastics and compounds, duromers, duromer composites and duromer compounds as well as thermoplastic elastomers play a key role. The plastics division is an identified skills center for questions regarding additivation, formulation and hybrids. It has extensive expertise in analyzing and characterizing plastics and the changes in their properties during processing and in use, and also in developing methods for time-resolved processes.
On behalf of customers, Fraunhofer LBF in Darmstadt develops, assesses and implements customized solutions for mechanical engineering components and systems, especially for safety-related components and systems. This is carried out in the performance fields of Vibration Technology, Lightweight Design, Reliability and Polymer Technology and includes solutions ranging from product design to verification – customized for you, for each individual client. In addition to the evaluation and optimized design of passive mechanical structures, the Institute designs active, mechatronic-adaptronic functional units and implements them as prototypes. In parallel it develops appropriate forward-looking numerical and experimental methods and testing techniques. Customers come mainly from automotive and commercial vehicle construction, shipbuilding, aviation, machine and plant construction, power engineering, electrical engineering, construction, medical engineering, the chemical industry and other industries. They benefit from the proven expertise of some 400 employees and cutting-edge technology accommodated in more than 11,560 square meters of laboratory and experimental space at locations in Bartningstrasse and Schlossgartenstrasse.
Anke Zeidler-Finsel | Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF
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