Black Oxide for Polymer Coloring

The Thermal Guard for Plastic Color

At Deqing Demi Pigment Technology Co., Ltd., we provide the "Heat-Proof Black" that the polymer industry needs. We recognize that in extrusion and injection molding, color failure is often a thermal failure. Our polymer-grade black is manufactured to ensure that "What goes into the extruder comes out the same color." We provide the "Polymer-Ready Black" that ensures your plastic products remain dark, durable, and UV-resistant for life.

Polymer Black Usage Areas

• Masterbatch Production: High-concentration black bases for universal plastic coloring.
• PVC Extrusion: Stable black for pipes, window profiles, and siding.
• Automotive Parts: UV-stable black for under-the-hood and exterior moldings.
• Agricultural Films: Opaque, weather-resistant black for mulch and silage wrap.

Polymer Grade Technical Specs

Performance Characteristics

• Low Moisture: Prevents "silver streaking" and bubbles in molded plastic parts.
• Minimal Migration: Pigment stays locked in the polymer matrix; will not "bleed."
• UV/Weather Guard: Provides natural protection to the polymer against sunlight degradation.
• High Dispersion: Fine particles prevent "specking" in thin-walled plastic products.

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

  A: Yes, we have specific grades that meet FDA and EU 10/2011 requirements for food packaging.

• Q: Does it affect the mechanical strength of the plastic?

  A: No, when used at recommended loading levels, it acts as an inert filler and does not degrade the polymer's physical properties.

Plastic Engineering Services

We offer "Filter Pressure Testing (FPV)," ensuring our pigment is clean enough for use in ultra-thin fibers and films without clogging machinery.

Custom Pelletized Pigment: We can provide the black oxide in a dust-free "Micro-Granule" form for easier handling in your dosing system.

The Science of Thermal Lattice Preservation

Black Iron Oxide (Fe3​O4​) is metastable; when heated in air, it wants to become Red (Fe2​O3​). The science of our polymer grade lies in "Oxygen Barrier Technology." By coating the pigment particles with a nanometer-thin layer of inert mineral (like Silica), we create a "Thermal Shield" that prevents oxygen from reaching the iron core during the high-heat molding process. This scientific intervention preserves the black color even at temperatures that would ruin standard oxides, ensuring your plastic parts remain a deep, consistent black.