Get In Touch
Nov2024 104x80.jpg
Current Issue
section
logo

STEER makes processing mica-based pigments easy

By Niranjan Mudholkar,

Added 12 July 2016

Eliminates shear peaks, gains control over energy distribution with its Omega platform

Coated mica crystalline platelets, such as those used in effect pigments in thermoplastics (ex: for pearlescent appearance, colouration, lustre, sheen, glitter, sparkle or multicolour effects), are extremely sensitive. Any alteration or change in size of the structure will hinder effective coloration and alter the appearance of the pigments and plastics. Unfortunately the technology available today does not account for exposure to shear — the biggest cause for attrition and damage to the structure.

The Omega Platform along with patented special elements eliminate shear peaks. Further, the special mixing elements with fully intermeshing and self-wiping profile prevent stagnation & degradation and the resultant char formation.

The OMEGA's ‘Barrel to Screw Gap and Screw to Screw Gap' is maintained at less than 0.25mm to have fully wiping effect rather than shearing effect addressing the issue of ‘leakage' and the deeper root depth (1.71) draws more of the resin into the screw root and away from the shear forces that occur when the melt contacts the barrel wall.

(Continued on the next page)