Plastics Technology

NOV 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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30% in energy consumption compared with the normally separate systems for PET recy- cling and preform molding. Another first is what Wöss described as "the first PET tray-to-tray recycling plant in the world," which went into production in The Netherlands this past June. The trays Wöss is referring to are thermoformed of 100% RPET by Sneltray BV, a unit of 4PET BV and sister company of 4PET Recycling BV. Wöss says the concept is also applicable to thermoformed PET clamshells widely used for packaging berries and other fresh fruit, as well as salads and sandwiches. The system involves washing the RPET flake, reprocessing through a Vacurema system, crystallizing and rebuilding the material's I.V., and then thermoforming—which is not yet performed directly inline. Wöss also discussed an Erema system called VOClear, which came out a year ago, for reducing VOCs in PET flake by up to 40%. This add-on to the Vacurema system removes VOCs coming from the PET itself, as well as from contaminants such as PVC or nylon. In addition, he said Erema has a new extruder screw concept that can provide up to 6° C lower melt temperature and 25% lower acetaldehyde (AA) levels in recycled PET. Also new is a new concept for inline crystallization of RPET immediately after pelletizing, which uses the latent heat in the pellet to save energy. The system is said to be compact and retrofittable. Wöss concluded with a sneak preview of what he called a "brand-new, groundbreaking innovation" that will be announced this month at the PETnology 2018 conference in Paris. It combines a modified version of the Vacurema technology with new, patented solid-state polymerization (SSP) technology that restores RPET I.V. while yielding the lowest color generation among existing technolo- gies, and accelerating decontamination and removal of VOCs. Making use of Erema's new inline crystallization technology mentioned above, this new system is said to achieve food-contact approval while achieving higher purity levels "surpassing existing brand-owner standards," Wöss said. Erema revealed a new extruder screw concept that can provide up to 6° C lower melt temperature and 25% lower AA levels in recycled PET. 3 1 6 • 2 8 4 • 2 0 2 0 / The high heat requirements in today's plastic molding or extrusion applications are met with Bunting's new FF350 Drawer Magnet. It's rated to 350 0 F, hotter than any other drawer magnet on the market. How can it take the heat? • High temperature compensated rare earth magnets for stronger hold • Temperature-resistant viewing window • Higher temperature rated seals and knobs • Fits the standard FF housing, so you can upgrade existing equipment with high temp components When you need to turn up the heat, call Bunting. Performance that turns up the heat. Introducing The FF350 Drawer Magnet, Rated To 350 0 F. 18 NOVEMBER 2018 Plastics Technology R E C YC L I N G Close -Up On Technolog y

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