This information comes from Dingrui Technology's on-site release at the 2026 China International Coatings Expo (July 15–17, Shanghai, Booth E1-1052) , personally presented by founder Wu Wangming.
🧣COLORSOL® HT Solvent Dyes: "Simulated Dope Dyeing" with Nearly Zero Wastewater
Process Essence
Instead of dyeing finished fabric, the dye is uniformly dispersed into the polymer melt before spinning (the industry calls this "dope dyeing"). Dingrui brands it as "simulated dope dyeing" because COLORSOL® HT uses a solvent dye system that achieves molecular-level dissolution and dispersion into melts like PET, PA, PPS, and PEEK, rather than relying on physical encapsulation like pigments.
Key Parameters & Advantages
- Temperature resistance >380°C: Withstands extrusion temperatures of PEEK and high-temperature nylons without decomposition or yellowing.
- Migration/sublimation/solvent/thermal-oxidative aging resistance: On-site demonstration showed finished T-shirts resisting alcohol wiping and detergent washing, with strong orange-red fluorescence.
- Nearly zero wastewater: Traditional dyeing consumes 100–200 tons of water per ton of fabric and leaves salt and azo residues; dope dyeing skips the dyeing and washing steps, minimizing terminal pollution, aligning with ZDHC/OEKO-TEX.
- Typical applications: Orange high-voltage harnesses for new energy vehicles (RAL2003), interior fabrics, engineering plastic housings, glass sintering inks.
One-liner: This dye's selling point isn't "greener color" but using high-temperature solvent dyes to replace post-dyeing processes with disperse/reactive dyes, converting the water treatment costs of dye houses into first-pass yield challenges for spinning mills.
🌞Infrared Reflective Black (Reflectance >45%): "Secondary Light Harvesting" for PV Backsheets
Principle
Standard black backsheet films absorb transmitted light as heat. Infrared reflective black maintains high reflectance in the near-infrared band (700–2500nm) while appearing black in visible light (pigments designed to "look black but not reflect in NIR"). Dingrui claims this can redirect 30%–40% of transmitted sunlight back to the solar cells, measurably improving overall power generation efficiency.
Why Black Instead of White
PV modules demand dark aesthetics; white backsheets offer high reflection but limited appearance options. Infrared black balances aesthetics + NIR reflection + weatherability, suitable for bifacial module backsheets, building-integrated PV films, and automotive exteriors. This variant belongs to Dingrui's COLORDUR® inorganic series, with reflectance exceeding 45% being its flagship metric at the 2026 Expo.
Value Quantification
Per Wu Wangming, "Even just one or two degrees of improvement translates into enormous power generation volume across the Chinese and global markets." — Essentially leveraging pigment optical properties to drive power gain at the module level. For the first time, pigment suppliers sit alongside module makers and backsheet film manufacturers on the same BOM table.
🔋CICP Composite Inorganic Pigments: "Battery-Grade Pigments" Resistant to Electrolyte Corrosion
What is CICP
Complex Inorganic Color Pigments — multi-metal oxides (Ti/Cr/Sb/Fe/Co/Ni, etc.) sintered at 800–1000°C to form spinel/sphene structures. Dingrui's COLORDUR® series falls under this category, characterized by: insolubility, chemical inertness, high temperature resistance, weather resistance, and high opacity.
Why Organic Pigments and Ordinary Inorganics Fail
Lithium battery electrolytes (LiPF₆ + carbonate esters) combine Lewis acidity + strong polar solvents + trace HF corrosion. Organic pigments leach/fade; ordinary iron oxides/chrome yellows are acid-decomposed. CICP locks metal ions within the crystal lattice with no active surface sites, enabling it to pass electrolyte immersion tests.
Application Scenarios
- Coatings for new energy vehicle battery pack housings and module brackets
- Outdoor coatings for energy storage cabinets and charging station enclosures
- Industrial anti-corrosion paints requiring chemical resistance
Dingrui's take: "With the rapid growth of new energy vehicles over recent years, demand in this field has been steadily increasing." — This marks CICP's true crossover from "construction/powder coatings" to electrochemical packaging.
🔔Industry Implications
Dingrui isn't the only player doing these three things, but its portfolio strategy is representative:
- One company simultaneously sells "high-temperature solvent dyes + infrared inorganic black + CICP", showing that pigment manufacturers' customer base has expanded from coating factories to spinning mills, backsheet film makers, and battery pack Tier 1 suppliers.
- The next phase of eco-friendly pigments goes beyond "lead-free and chromium-free" to "color + thermal management + electrochemical corrosion resistance", priced by function rather than by ton.
- All three lines — dope dyeing, infrared reflection, and battery-grade CICP — bypass traditional textile wastewater treatment paths entirely. This represents "process-front-loaded environmental protection," which aligns better with carbon border tax logic than end-of-pipe treatment.
Tracking Suggestions: Watch for Dingrui's COLORSOL® HT mass production orders in PEEK new energy vehicle components; whether the infrared reflective black enters certification lists of backsheet film makers (e.g., Cybrid, Mingguan, Foresight); and benchmark cases of CICP in energy storage cabinet coatings. Any of these landing would serve as validation points for eco-friendly pigments entering the new energy track.
