ODOUR REDUCTION | INNOVATION
be specially formulated for injection and blow moulding, film and other extrusion processes. They also can be used in combination with other Ampacet R3 Sustainable Solutions products, including ThermProtect, BlueEdge and ReVive, to minimise issues such as thermal degradation, inconsistent colour or product uniformity that may occur with the use of high quantities of recycled material.
AFI Global says its Addisperse ON108 (pellet) or ON106 (powder) can reduce the smell of burnt wax arising through oxidation of a polymer like HDPE as a result of multiple heat histories. For compounds containing natural fillers, which can break down during processing, it offers ON103 (pellet) or ON104 (powder) for countering odours based on chemicals containing sulphur and amines. The company says it is currently develop- ing odour elimination masterbatch that will be acceptable for use in food packaging applications, such as trays, boxes and film. Some odours can be attributed to a build-up of
bacteria, moulds and mildew within raw materials that have not been stored or handled properly. Microban International has considerable exper- tise in incorporating antimicrobial additives into recycled plastic products to help reduce microbial growth and eliminate odours. It also boasts deep knowledge of global regulatory requirements that help manufacturers to navigate the complexities of regulations in various geographical markets. For example, it ensures that all its antimicrobial solutions are registered with the Environmental Protection Agency (EPA) in the US or notified with the Biocidal Products Regulation (BPR) in Europe.
Equipment developments Odour-eating options from compounding equip- ment manufacturers are on the increase too. Deodorising systems from Coperion are one example. In order to optimise the specification of such a deodorising system and to individually determine its operational parameters, the com- pany now provides onsite tests using its mobile deodorising unit at customer production facilities for reducing plastic recyclate odour (see also Plastics Recycling World October 2021). “Using this solution with freshly produced product and under actual production conditions, the potential for reducing recyclate odour can be thor- oughly investigated, and system param- eters to achieve desired optimal product quality can be defined on location,” says Ralf Bösch, Head Of Research & Devel- opment, Material Handling. “Coperion determines the optimal
parameters for the targeted odour reduction, enabling variable selection of both the devolatilisa- tion medium (dry or humid air, pressure) and temperature. Such flexibility allows for intensive investigation into which condi- tions most effectively remove odours. Deodorisation temperatures of up to 150°C are possible.” Kreyenborg already has solutions for decon-
tamination of PCR-PET, crystallisation, drying, and heating of bulk materials, using infrared technol- ogy. Now it says further development of this
Below: Coperion’s mobile
deodorizing system
IR-FRESH® IR-CLEAN®
ODOR REDUCTION OF POST-CONSUMER MATERIAL DECONTAMINATION OF rPET FLAKES FOOD GRADE
VISIT US!
Hall 9, Stand A27
plastics@kreyenborg.com
www.kreyenborg.comeyenborg.com
plastics@kreyenborg.com
IMAGE: COPERION
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