additives | Odour and emissions
tions in mind during development of Envision Plastics’ Deodorized Resin line. The US-based company announced at the end of last year that it has supplied more than 2,200 tonnes of its Deodorized Resin HDPE product - produced from post-consumer recycled plastic using a proprietary deodorising process technology - since it was introduced to the market in 2015. “To put it plainly, we take the smell out. Our patented
process takes post-consumer plastic and reduces the odour to a level such that the revitalised resin can be used in a variety of scent sensitive applications,” says Mark Shafer, General Manager at Atlanta-based Envision, which is a division of Consolidated Container Corporation and processes almost 100% post-consum- er HDPE bales sourced from across North America. Shafer says the patented odour removal technique is
Above: Growing use of recycled polymers is driving demand for improved odour neutral- ising and
management
block offensive or unwanted odours. Italian masterbatch manufacturer VIBA offers the
Vibatan range of fragrances, which it describes as resistant fragrance products that can be used at low dosages to add scent to polymers. The products are claimed to perform at high temperatures without compromising the quality or functionality of products. Standard fragrance masterbatches include lavender, lemon, orange, strawberry, pine, vanilla, chocolate and talc.
Vibatan masterbatches are suitable for injection moulding and extrusion of polyolefins such as PE, PP and EVA and are supplied as colourless granules, so they do not interfere with the colour of end-products. According to VIBA, the fragrances can be used to cover up the smell of resin in products and are particularly aimed at those applications where a pleasant scent is essential, such as toys, artificial flowers, household items, moulded articles including decorations, market- ing and promotional pieces. The masterbatches can also be added to mask the undesirable odours associ- ated with recycled polymers or in applications such as dust bin bags or household chemical containers, nappy/ diaper bags, rubbish bags, bin liners and hospital waste sacks.
Scent selection VIBA says one new and growing market area for the Vibatan products is in the addition of fragrances to closures of shampoo, health and beauty products, and laundry detergents. This provides a real benefit for brand owners in allowing consumers to sample the scent of the package contents without breaking tamper-evident sealing features. Scent sensitive applications were the prime applica-
32 COMPOUNDING WORLD | January 2017
performed as a secondary step following extrusion of the pellets and uses controlled air flow, agitation, temperature and residence time to remove volatile components from the resin. No chemical additives are employed. He says the end-of-line process gives it great production flexibility. Envision’s Deodorized Resin HDPE is available in
natural and mixed colours and can be used as supplied or combined with other compounds. It can be used in a variety of non-food applications where scent sensitivity is an issue, with examples including automotive air-conditioning vents and personal care products. Shafer says that quantifying odour is a technical
challenge but adds that has not presented an obstacle for the company. “Scent is subjective; different people have different sensitivities and smell things differently. But the way that we position this [Deodorized Resin] is to trial it. The fact that we have a product that might eliminate an odour proposition is our value proposi- tion,” he says.
Deodorized Resin is being used by US-based
automotive and transportation components manufac- turer Engineered Plastic Components. “Our issue with using post-consumer resin in the past was the smell but Envision Plastics has provided us with a sustainable solution for our high quality automotive products through their Deodorized Resin,” says Engineered Plastic Components Plant Manager Jack McCoy.
Click on the links for more information: ❙
www.byk.com ❙
www.ampacet.com ❙
www.polyfilcorp.com ❙
www.addmaster.co.uk ❙
www.vibamasterbatch.com ❙
www.envisionplastics.com
www.compoundingworld.com
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