Polyolefins, including polyethylene (PE) and polypropylene (PP), are among the most widely produced plastics globally. Ultramarine blue pigment is an excellent choice for coloring polyolefins due to its high heat stability, non-migration, and excellent chemical resistance.
In polypropylene, which requires processing temperatures above 200°C, ultramarine blue remains stable without color shift or decomposition. Unlike some organic pigments, it does not cause warpage or affect the crystallinity of the polymer.
The pigment also does not promote photo-degradation in polyolefin films, making it suitable for agricultural films and packaging applications that require long-term UV stability when used with appropriate light stabilizer packages.
SKU Pigments recommends specific ultramarine blue grades for different polyolefin applications. Our technical team provides guidance on optimal pigment loading, dispersion methods, and compatibility with other additives in the formulation.
Polyolefin processors benefit from ultramarine blue’s low specific gravity relative to its tinting strength, meaning lower pigment mass is needed per kilogram of polymer compared to heavier inorganic pigments, resulting in cost savings.