additives | Anticounterfeiting
product is authentic. From there, you can provide guidance, information and suggest other products.”
Simplifying sorting Polysecure’s robust marker particles, in addition to being used in anticounterfeiting and authentication, can be used to improve the efficiency of material sorting in recycling processes. Separation of plastic waste is key to optimising its re-use, but separation at the consumer level is not practical; sorting must occur after collec- tion, says Dr Martin Fahr, research and development and product manager at Polysecure. It is difficult, however, to separate chemically similar materials (for example food-grade versus non-food grade PET, or plastics with and without different inorganic additives) using existing commercial sorting technology. Fluorescent marker additives, at levels under 100ppm, create an economically viable solution by allowing separation of recycled plastic flakes in a high-throughput process using specially designed sorting machines. Polysecure can provide variations of the markers that can be distinguished from each other, and the sorting technology for this is uner development.
The markers “survive fires, extensive heat, aggressive chemicals, mechanical strain and more without any loss of efficiency,” says Fahr. The technology can be used to separate fractions in a
waste stream, such as bio-based polymers from synthetic polymers or glass-fibre reinforced PVC from other PVC streams. It would be possible, with strong support by industry, to standardise markers for certain compound types to allow widespread sorting with this method and improved re-use, says Fahr. The technology can also be used to uniquely identify and sort a specific company’s material – some major brands are interested in getting back their packaging materials after use to close the recycling loop, he says.
Click on the links for more information: ❙
www.polyone.com ❙
www.plasticscolor.com ❙
www.systechone.com (Systech) ❙
www.adnas.com (Applied DNA) ❙
www.polysecure.eu ❙
www.trutags.com ❙
www.steritouch.com
Polymers
ENSACO TIMCAL Carbon Black
• electrical conductivity • easy-dispersion • high purity
For electronic packaging, fuel hoses, fl ooring, power cables and accessories, conveying belts, ATEX applications.
®
TIMREX TIMCAL Graphite
• thermal conductivity • electrical conductivity • lubrication
For seals, water-meters, heat sinks, geothermal pipes, LED light sockets, primers for electrostatic painting, gas barrier properties.
®
imerys-graphite-and-carbon.com
CONDUCTIVE CARBON BLACK
GRAPHITE AND EXPANDED GRAPHITE
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