MATERIALS | COLOURS AND MASTERBATCH
Right: Black masterbatch pellets from Cabot
tionality, such as haptics and odour. “The industry is also seeking colour solutions
Below: Irrigation pipes manufactured with black masterbatch from Cabot
that reduce the impact on the mechanical proper- ties of the final product, while minimising down- time when switching colourants by improving the efficiency of colour changes. In terms of coloura- tion, it remains key to improve dispersion of colourants, which can influence quality control, production speed and durability of the final product. The industry is still working on new techniques and solutions to address these chal- lenges from both the raw material and machine manufacturer sides.” Cabot adds that its latest product innovations include a range of masterbatches specifically tailored for the need to cover mixed coloured plastics. PlasBlak 628 masterbatch series is de- signed to encompass a range of formulations to tailor to low and high end plastic applications, and provide unique cover power and high dispersion. The company says that it is successfully applied where there is a need for overcolouring grey/mixed coloured recycled polymers. With growing use of recycled polymer material these masterbatch formulations have demonstrated success in both packaging and consumer goods applications. In addition, there is a new range for PET used in the packaging industry. Future developments may also include custom made black masterbatch formula- tions with higher dispersion to enhance the durability of the final product. Modern Dispersions has developed several blue-toned black masterbatches for extrusion applications, where there is now a demand for similar colour matches for injection moulding applications for automotive interior applications. The company says that the market is demanding very specific blue tone black colour matches for particular vehicle models. This requires continuous colour matching efforts from the colour develop- ment team.
Typical automotive applications require strong dispersion of pigments into various interior surfaces to match the overall colour scheme. “Modern automotive interiors demand higher jetness along with different undertones from a pigment masterbatch to match the overall interior scheme,” says Jan Kozma, Vice President of Sales and Marketing for Modern Dispersions. Carbon black is used in auto interiors not only as a pigment but as a functional filler due to its ability to increase UV stability. Colour levels are carefully controlled to ensure consistency since variables during process- ing can affect the colour performance of the masterbatch, according to Kozma. The blue-tone carbon black masterbatch can be used in a wide range of resin systems including polyethylene, polypropylene, and thermoplastic olefin elastomers. Typical usage levels range from 5-8% by weight depending on the total polymer system in the final product. The new blue-tone masterbatches have found commercial use in a range of interior applications at leading US automakers. Ampacet has introduced Odor Scavenger 1000258-E, a powerful wide spectrum odour-ab- sorbing masterbatch designed for use with recycled polyethylene to neutralise odours of post-consumer recycled material and keep them enclosed inside the polymer. Specially formulated for injection and blow moulding, film and some extruded applications, such as geomembranes, Odor Scavenger 1000258-E minimises odours, which allow processors to improve their circular economy targets by boosting the content of post-consumer recycled resin. Suggested uses include bottles, garbage bags and geomembrane liners. Ampacet says that Odor Scavenger
52 INJECTION WORLD | July/August 2019
www.injectionworld.com
PHOTO: CABOT
PHOTO: CABOT
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