Pigments Powder for Polymer Coloring

Integrated Polymer Coloring Solutions

Deqing Demi Pigment Technology Co., Ltd. provides the plastics industry with a robust range of inorganic colorants designed for long-term performance. Our pigments are chosen for their ability to meet the stringent requirements of the polymer sector, including lightfastness and resistance to migration. We support manufacturers in producing high-quality consumer and industrial plastics by providing materials that are easy to handle and offer predictable color development across various resin grades and processing temperatures.

Polymer Processing Segments

• Extrusion: Coloring for pipes, window profiles, and plastic siding.
• Injection Molding: High-precision color for housings, containers, and automotive parts.
• Blow Molding: Uniform coloration for plastic bottles and industrial drums.
• Film Extrusion: Fine-particle pigments for colored agricultural and packaging films.

Polymer Grade Data Table

Functional Benefits for Plastics

• No Migration: The insoluble nature of these pigments prevents bleeding or blooming in the polymer matrix.
• Dimensional Stability: Low nucleating effect ensures that the plastic part does not warp or shrink during cooling.
• UV Protection: The pigment acts as a light absorber, protecting the underlying polymer from photodegradation.
• Universal Compatibility: Suitable for use in a wide range of commodity and engineering resins.

• Q: Do these pigments comply with food contact regulations?

  A: We offer specific grades that are tested for compliance with FDA and EU food contact standards. Please specify your regulatory requirements during the inquiry phase.

• Q: Will the pigment cause warping in large molded parts?

  A: Our inorganic iron oxides have minimal impact on the crystallization of polymers like PP, meaning they are "non-warping" and preserve the part's dimensions.

Precision Milling for Plastics

We utilize advanced micronization techniques to ensure that our pigments for polymers have an extremely low residue on the 325-mesh sieve. This is critical for preventing breakages in thin-film extrusion and "gate blush" in injection molding.

Custom Masterbatch Trials: We can provide small-batch samples optimized for specific carrier resins, allowing our customers to verify the dispersion and color strength in their own production equipment before committing to bulk orders.

Analyzing Dispersion Quality in Polymers

The quality of polymer coloring is measured by the "Filter Pressure Value" (FPV). We ensure that our pigments maintain a low FPV, indicating excellent de-agglomeration in the melt. Using CIELab color measurement, we track the color consistency across different let-down ratios. Our goal is to provide pigments that achieve a Delta E of less than 1.0 when compared to the master standard, ensuring that multi-part assemblies (like an automotive interior) have a perfect color match across different plastic components.