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INNOVATION | MINERAL FILLERS


Ocean sourcing Oolitic aragonite is “an established mineral [calcium carbonate] in a renewable and sustainable form,” according to Chris DeArmitt, President of polymer consultancy Phantom Plastics and supporter of Arctic Minerals’ development of AquaFlex oolitic aragonite filler for plastics. Aragonite calcium carbonate mineral is precipi-


Above: Tarkett and Ragn-Sells aim to trans- form this ash from shale rock energy plants in Estonia to a low carbon filler for flooring


25% recycled content to be used in non-reusable packaging by 2025, appear to be driving the market change, he says. The company says Omyaloop product has been


certified as 100% recycled material by Bureau Veritas and that it meets EU food contact require- ments. It is said to be suitable for use as a 1:1 replacement for conventional calcium carbonate in many compound formulations and is available in several commonly used particle sizes. The com- pany says that the carbon footprint of Omyaloop is comparable to conventional calcium carbonate grades (approximately 54kg CO2


/ton).


“Many processors in key application areas such as automotive, PVC flooring, construction pipes and profiles, already use partially recycled poly- mers. One major component in such formulations is the mineral filler. The ability to replace this comparably large amount by a recycled alternative is driving high attention in the market,” Seyvet says.


tated by cyanobacteria in the ocean (from carbon dioxide and calcium) and is being deposited at a rate more than 100 times the current rate of harvesting, which De Armitt says makes it a renewable mineral. He adds that the material is also 40% newly sequestered carbon dioxide and contains no detectable crystalline silica. As harvested from the ocean, the egg-shaped


beads are 1-2 mm in length. These are then milled to a size suitable for compounding into plastics. Oolitic aragonite is not likely to compete with GCC in cost terms, according to DeArmitt, but it could fill a niche for those looking for a renewable filler. “Adding 20 to 40% aragonite is an easy way to reach renewable and sustainable plastic targets,” he says.


Other companies with oolitic aragonite products for plastics include Calcean, which supplies OceanCal; and Asbury Carbons, which says that its CarboRaygrade is available with particle sizes of 750 microns and finer. Oolitic aragonite was covered in more detail in the June 2021 issue of Compounding World). Swedish environmental technology company


Ragn-Sells is working towards circularity by reusing waste produced in oil shale burning in Estonia to create new raw materials (oil shale rock


www.xindacorp.com info@xindacorp.com


IMAGE: RAGN-SELLS


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