Pigments Powder for Plastic Coloring

Specialist in High-Heat Plastic Colorants

Deqing Demi Pigment Technology Co., Ltd. provides the plastics industry with high-purity inorganic pigments that deliver exceptional performance in polymer processing. Our pigments are manufactured to ensure they do not act as nucleating agents, thereby preserving the mechanical properties and shrinkage characteristics of the plastic. We support global plastic manufacturers in achieving vibrant, lightfast colors for both consumer goods and industrial components, ensuring compliance with international safety standards for polymer additives.

Plastic Coloring Application Sectors

• Injection Molding: Consistent coloring for household appliances and automotive interiors.
• Blow Molding: High-opacity pigments for bottles and containers.
• Film Extrusion: Fine pigments for agricultural films and packaging.
• Pipe Extrusion: UV-stable coloring for HDPE and PVC piping systems.

Plastic Grade Technical Data

Core Characteristics for Polymers

• Non-Warping: Does not interfere with the crystalline structure of HDPE or PP.
• High Dispersibility: Rapidly integrates into the melt with minimal screw torque.
• Chemical Inertness: Resistant to antioxidants and UV stabilizers used in plastic compounding.
• Low Volatility: Zero outgassing during high-temperature molding cycles.

• Q: Can these pigments be used for food-contact plastics?

  A: Yes, we offer specific grades that comply with FDA and EU food contact regulations (AP 89-1).

• Q: Do they cause "plate-out" on the mold?

  A: No, our inorganic pigments are surface-treated to prevent accumulation on mold surfaces, reducing downtime for cleaning.

Polymer Compatibility Testing

We offer a full evaluation of our pigments in the client's specific resin grade to ensure optimal color development and physical property retention.

Custom Masterbatch Pellets: While we supply the powder, we can also provide data for "Let-down" ratios to help masterbatch producers achieve the most cost-effective color loading.

Dispersion Science and Filter Pressure

In plastics, color science is measured by the "Filter Pressure Value" (FPV). We ensure our pigments have a low FPV, indicating excellent dispersion and the absence of agglomerates that could clog fine extruder screens. By monitoring the "Delta E" across different injection pressures, we ensure that the color remains stable regardless of the molding complexity. We provide CIELab data for both mass-tone and tinted let-downs, allowing plastic engineers to predict the final appearance of thin-walled or thick-walled parts with high precision.