New optical brightening additive masterbatch that minimizes yellowing and greying of PET

A new optical brightening additive masterbatch that minimizes yellowing and greying of PET (polyester terephthalate) polymers caused by the introduction of post-consumer-recycled resin (PCR) has been unveiled by Clariant. Even a small quantity of the additive can make material with up to 25% recycled content visibly brighter. The additive has received approval for food-contact applications from the U.S. Food & Drug Administration and similar regulations in the European Union. Peter Prusak, Head of Marketing, Clariant Masterbatches North America, says, “The clarity and colorability of this polymer make it ideal for high-end products and recent developments now make it possible to incorporate relatively high percentages of recycled material without compromising on appearance. That’s really important for brand owners with aggressive sustainability objectives.” To offer designers and marketers new options for luxurious and colorful packaging, Clariant has introduced a new range of pearl-effect pigments based on synthetic mica-like materials. These new looks are being displayed in PET bottles with complementary PP caps. “People are beginning to take notice of the very rich beauty this new series of pearls can create,” Prusak says. “We believe they offer a really attractive alternative to painting when it comes to decorating plastic containers for the luxury market.
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