MATERIALS | COLOURS
Food ingredient from Palsgaard also acts as colour dispersing aid
Polymer additives specialist – and food ingredient manufacturer – Palsgaard says the search for sustain- able solutions applies to colour dispersing aids too. “The good news is that the solution is already available thanks to the technology behind a much used food ingredient.” The company’s Einar 101, which is a plant-based liquid, “has been proven to be more efficient than the powdered waxes currently on the market,” it says. Einar 100 is based on the chemistry behind polyglycerol polyricineolate (PGPR), originally designed to control viscosity in chocolate and to prevent oil separa- tion in low-fat margarine spreads. Traditionally, powdered, petro- chemical-based waxes have been used to coat pigments and help distribute them in the polymer product. This can create airborne dust, which may have a negative effect on the distribution. Palsgaard says Einar 101 has “outstanding” performance compared to industry standards. “In colour masterbatches, it has been proven to be more efficient
than waxes currently on the market at much lower concentrations,” the company says. “This in turn means that pigment loadings can be reduced to achieve the targeted colour strength, which saves cost, helps achieve faster colour changes and enhances sustainability profiles.” Einar 101 can also be combined
with renewable waxes to boost colour strength. “As an added benefit, colour masterbatch producers will also be able to improve production process- es, since the equipment becomes much easier to clean when switching to other colours,” Palsgaard adds. The company says that by substitut-
compatibility should take precedence over brand consistency – particularly for products with a short lifecycle. Barber says: “We know that highly loaded colours can impede the recycling process. Some- times the greenest thing to do is make compro- mises on colour in order to support sustainability. So when it comes to colour, will there come a time when consumers see this as a barrier to recycling?” In his view, “As more PCR is used, consumers will
gain greater awareness of recycled content in packaging. Less pigment and higher amounts of PCR won’t lend themselves to perfect-looking packaging. However brands that are happy to feature imperfections have a great opportunity to communicate this positively. They’ll rightly be seen by consumers as leading the sustainability move- ment in plastic packaging. The environmentally conscious consumer will increasingly turn to these brands over those that clearly prioritise appearance
40 PLASTICS RECYCLING WORLD | July/August 2021
ing PE wax with Einar 101, the pigment concentration can be reduced by 25% while achieving a better colour strength and lowered FPV. “By replacing just 1% PE wax with Einar 101, a significant increase in colour strength and decrease in filter pressure can be observed.” Einar 101 coats the pigment and enables a uniform and homogeneous dispersion of individual pigment particles in the polymer. Palsgaard says Einar 101’s chemical composition as a non-ionic surface active compo- nent means it is free from low-molecu- lar-weight oils that can adversely affect colour applications.
over sustainability. Our colour matching suite will be enhanced during our ongoing site upgrades. It’s perfect for allowing us to educate customers as we can demonstrate our process to them. It works really well when colouring materials with high levels of PCR.”
CLICK ON THE LINKS FOR MORE INFORMATION: �
https://finke-colors.eu/en �
www.avient.com �
https://gabriel-chemie.com �
www.alfarben.com �
https://hollandcolours.com �
https://kafrit.com �
https://af-color.com �
www.jokey.com �
www.gruener-punkt.de �
https://broadwaycolours.com �
www.palsgaard.com/polymers
www.plasticsrecyclingworld.com
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