Synthetic pearl lustre like other high aspect ratio pigments exhibit poor solid flow behaviour. In the extruder based manufacture of thermoplastic masterbatches this limits output, by restricting the conveying capacity of the feed zone. Proprietary wax encapsulation technology now allows four fold or greater improvements in the extruder output without changing the particle shape or size distribution of the pigment prior to the compounding process. The encapsulation process also leads to low dust characteristics.
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