Plastics Technology

OCT 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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Carolina Color in 2010, and now serves as Chroma Color's COO. While the G2 patent is in the public domain, the know-how devel- oped by Smink and Dr. Ronald W. Harris, a consultant and widely recognized expert on coloring plastics, remains proprietary. "We tried to develop a culture that encouraged exploration," states Barr. "It's OK to fail if you learn from it." G2 technology caught on quickly, penetrating outdoor olefin-based products such as siding, roll-out carts, and portable toilets. The next challenge for Carolina was to extend the technology to other resins while increasing the coloring strength, thus further reducing its cost-in-use for colorant buyers. In development for several years, G3 was fully commercialized in the spring of 2017. G3 was developed in part to provide processors using liquid color with an alternative technology that would deliver additional savings while eliminating the housekeeping challenges associated with spills and the like, according to Barr. Among its key attributes are said to be versatility in just about any resin system and ability to achieve 20% or more increased pigment loading levels over G2 without compro- mising dispersion. It has also been shown to enable formulations with 40-45% loading of dyes in HIPS, PET, nylon, crystal PS and acrylic.. Also claimed are formulations with 50% or more pearlescent pigment, vs. the former industry standard of 30%. The G3 technology reportedly has proven effective in diverse appli- cations such as packaging, housewares, and lawn and garden. "G2 and G3 grew and grew quickly," states Barr. "It's what helped us get in front of large specifiers." States Smink, "G3 offers pigment loadings that eclipse any other colorant technology, including liquid. To be able to deliver colorant that efficiently and in a solid pellet form is a game-changer." SOLVING FEEDING ISSUES Dosing color concentrates at levels as low as 0.2% for G3 and 0.7% with G2 to the processing machine required some innovations on the feeding side as well. While G2 and G3 took off quickly, Barr notes that equipment limitation on the feeding-equipment side made some molders without gravimetric feeding technology hesi- tant. So in 2015, Carolina teamed with Israel-based LIAD Weighing and Control Systems Ltd., to offer a bundle consisting of LIAD's advanced auxiliary feeding and blending systems to run G2 and G3 concentrates. WWW.NORDSONPOLYMERPROCESSING.COM EXTRAORDINARY TECHNOLOGIES FOR TODAY'S PLASTICS Easily extend production thickness range capabilities without compromising the quality of the sheet Maximize extruder uptime by making convenient 'on-the-fly' adjustments to the lip gap whenever end product thickness is changed EDI ® SmartGap ™ Die Advanced Technology for the Production of Sheet Chroma Color has fully equipped labs capable of matching colorants to meet demanding requirements. But for most companies that supply colorants for plastics, the eye test remains crucial. 44 OCTOBER 2018 Plastics Technology PTonline.com Chroma Color Corp. On-Site

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