COLOURS | MATERIALS
homogeneously is a challenge well suited to liquid colours. Because the liquid concentrate colours the recyclate chips in the feed area, it is evenly distrib- uted before the polymer is melted in the extruder. It does not matter if the recyclate contains
different plastic types since the universal carrier is compatible with all materials. Much more potential can be exploited if liquid single pigment disper- sions are mixed by the user as the colour formula- tion can then be quickly adapted to the changing colour of the PCR. In the case of upstream re-granu- lation on a twin-screw extruder, inline colour correction is possible by separate feeding. At last year’s K Show, in partnership with Krauss
Maffei, Rowasol displayed ColorAdjust, an innova- tive system for colour measurement and control in the recycling process. Also, the ColorDoS dosing system displayed by German pump manufacturer HNP Mikrosysteme demonstrated a quick, clean Rowasol colour change on an injection moulding machine. In partnership with French bioplastic experts
NaturePlast, in May Ampacet launched the Secret Sea-Grit collection made from 100% PCR material and aquaculture waste. Specifically designed for
injection moulded products, Secret Sea-Grit is suitable for consumer goods and packaging applications in multiple markets. The collection of nature-inspired shades is available in eight colour- ways: Bivalve Brown, Nude Nacre, Muted Murex, Softshell Celadon, Beachcomber Blue, Salty Sienna, Brackish Brown, and Saltwater Sand. Earlier this year, Holland Colours and PET
packaging technology specialist Sipa collaborated on an award-winning PET wine bottle design which it is hoped can become a more environmentally- friendly replacement for glass in which the colour of the bottle plays a pivotal role. To appeal towards the customer’s sense of familiarity, achieving a look reminiscent of glass was crucial. However, the choice of colour wasn’t solely for aesthetics as there was also a requirement for an oxygen barrier system to enhance shelf life perfor- mance. As a global leader in custom-made colour- ants and additives for plastics and coatings, Holland Colours’ expertise was pivotal. The challenge was twofold; to develop colourants that have proven to be effective when used with oxygen scavenging systems to ensure the wine’s integrity, and also to achieve the perfect hue that would appeal to
ABMF PET C
Continuous Automatic Belt Melt Filter
► Dual cavity technology for polyester ► Highest filter fineness down to 20 µm ► Lowest melt loss of <1,0 % ► Suitable for heavy contamination
www.britas-solutions.com
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