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●Proprietary masterbatch series improves the shortcomings of sorting systems
● Create opportunities for very dark colors like blues and greens
●New colorants completely eliminate the need for carbon black
Matteens, June 18, 2020 – Clariant continues to develop new technologies to improve the recyclability of plastics, while providing packaging and product developers with more color options
.
However, the new Clariant colour concept, developed at the ColorWorks Design and Technology Centre near Milan, Italy, now makes it possible to explore a darker and more mysterious colour space that does not use carbon black at all
.
In most automated sorting systems, infrared light is projected onto plastic materials, and the system can sort different materials due to the way different polymers reflect the light
.
Late last year, Clariant launched CESA IR, a masterbatch range that makes near-infrared radiation visible to black plastics
.
But designers wanted more options than pure black
.
To address this, the Color Engineering team conducted a project using CESA infrared technology to develop colors that can be darkened without the use of carbon black
.
“Until now,” says Clariant’s regional circular economy and sustainability manager EMEA, “to enable detection of black and black plastics in the NIR spectrum requires careful control of the amount of carbon black, which is It 's not always possible in the real world
.
The range is suitable for all major packaging polymers including polyester, polyethylene and polypropylene (including post-consumer recycled resins) in a variety of packaging applications, including trays, bottles and closures
.
