PIGMENTS | SPECIAL EFFECTS
Right: Edelstein Ruby Red from Eckart employs a high-chromatic red pigment with powerful sparkle and gloss
dioxide. The company says the new products provide high coverage in chromatic earth tone effects in shades of beige, bronze, copper, golden copper and russet.
Geotech will also launch a high-chromatic
Right: Geotech is adding six new special effect pigments to its product range this year
intense red pigment in the 10–60 microns particle size range, which it says is unlike previous alterna- tives. The company says its combination of a synthetic mica-based pigment coated with high concentrations of iron oxide provides good reflectivity and extreme colour intensity. Its iron oxide coating makes it is an interesting alternative to carmine-coated pigments, the company claims. Geotech also says that its borosilicate-based Geodiamond range will be extended with an XL grade offering a particle size distribution of 100-500 microns. The new addition will provide high reflective glittering effects in interference colours. The company says with demand for sparkling and glittering effects increasing, the Geodiamond XL range will be presented as an alternative to polyester-based glitter flake. The company says the new product introduc- tions will be accompanied with the launch of an inspiration box for plastic applications. This contains a selection of plastic samples containing the new special effect pigments. The samples contain 1% special effect pigment, some in combination with 1% coloured masterbatch, moulded in clear polypropylene. The masterbatch colours used include black and translucent red.
Natural effects Gabriel-Chemie sees a clear trend in special effects for use in individualised packaging. “As well as laser marking, a high degree of individualisation can be achieved by marble effects in plastics,” says Mark Hannah, Marketing Director at the master- batch producer. “Our Competence Center started three years ago with trials of two or more colour
60 COMPOUNDING WORLD | March 2018
www.compoundingworld.com
combinations. With significant customer interest, we decided to develop more marble effects and named the range Perfect Imperfection. This was inspired by shapes and structures formed over time in nature. We have developed previously un- achieved effects in plastics, such as marble veins, wood grains, oxidation processes and stone surfaces. Perfect Imperfection represents provoked individuality, controlled randomness and an imaginative range of colours.” The company adds that modern injection moulding machines generally require good homogenisation between polymer and pigment to achieve as smooth as possible optical appearance. However, this homogenisation must be avoided in order to achieve a marble effect, which requires precise processing parameters. Gabriel-Chemie says it has developed a range of marble effect masterbatches that can make each moulded item individual and unique.
Complex combinations “Every polymer type needs special development to find the correct combination of raw materials to achieve the marble effect,” says Nicole Ziegler, Media Relations and Marketing Manager at Gabriel Chemie. “The effect masterbatch may consist of up to ten colours and combinations can be custom- made. However, particular attention has to be focused on the processing parameters, which our Competence Center can advise on.” The development of the marble effect started with trials in polypropylene, followed by polyethyl- ene. “Marble effects can now be successfully achieved in injection moulding with both., she says. “We are currently running trials for extrusion applications, such as pipes, film and sheet, and
PHOTO: ECKART
PHOTO: GEOTECH
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