COLOURS AND MASTERBATCH | MATERIALS
IMAGE: AVIENT
Avient’s Reboux says that using a selected list of pigments and additives, company colour experts can enhance biodegradable starch blends or PLA without affecting degrada- bility of the resins. Avient’s bio-colourants meet the European Norm EN 13432, which defines the characteristics of packaging that can be recycled by composting and biodegradation. They are also “OK Compost”
certified by TÜV Austria. Holland Colours is supplying bio-based colour masterbatches for use in sunglasses
Above: Using a selected list of pigments and additives, Avient colour experts can enhance biodegradable starch blends or PLA used for various packaging products, including coffee capsules, without affecting degradability of the resins
be used in products based on recyclate as well as in products made from virgin material. All masterbatches from the Fibarec series are based on either post-consumer or post-industrial recyclates. This enables the production of attractive colourful plastic products made from 100% recyclate. The Fibarec masterbatches available so far are based on rPET. Fibarec based on the carriers rPE and rPP will follow shortly.
Grey recyclate The challenge of colouring PCRs lies in the inherent greyish colouring of most PCR materials, which needs to be taken into account in the matching and adjusting of the colourant. This being one of Finke’s core competencies, customers can rely on its experienced colourists, who develop more than 8,000 new colour shades in accordance with customer specification each year. The exper- tise of Finke makes for a short time to market with almost any thermoplastic material. To meet the demand for individual product samples at all times, the company operates several injection moulding machines at its technical centre in Wuppertal, Germany.
Almost all common thermoplastic carrier polymers are on stock and can be processed at Finke’s technical centre. Plastics manufacturers can choose from three service concepts for the colour matching process for their individual ready-to-use Finke colourant: services for colour matching and sampling according to specification, custom colour matching at Finke’s laboratory, or providing an on-site colourist service. Design for recycling is becoming well estab- lished. Now, here comes design for composting.
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produced by The Ocean Cleanup from plastic recovered from the Great Pacific Garbage Patch. Holland Colours joined The Ocean Cleanup, founded by Dutch inventor Boyan Slat in 2013. Gina Provó Kluit, Global Marketing Director of Holland Colours, says: “Our mission is to contribute to the development of a sustainable industry and to co-design colour and functional solutions with our customers. We need to move to a more sustainable world, so we want to help such initiatives where we can by adding value to their recycled end product.” Holland Colours has tailored Holcobatch colour
concentrates based on a biopolymer carrier to the requirements of the sunglasses, which are the organisation’s first product made with certified ocean plastic. All proceeds go back to The Ocean Cleanup to fund the continuation of the clean-up operations.. Lanxess says it is supporting masterbatch
producers in the process of formulating coloured biodegradable plastics by offering pigment
Above: The level of heavy metals in Colortherm iron oxide pigments are determined in the Lanxess laboratory. Customers then receive recommendations regarding the maximum pigment concentration in biodegradable plastic formulations with a low heavy-metal content. The masterbatch producer can then develop formulations that comply with the relevant limits without the need for pigment screening
July/August 2021 | INJECTION WORLD 43
IMAGE: LANXESS
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