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Demei focuses on the research, development, and production of inorganic iron oxide pigments. Our pigments cover iron oxide red, yellow, black, brown, green, orange, blue, etc.
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Product Details
Comprehensive information about our iron oxide pigments including specifications, applications, advantages, and more
Pigments Powder for Rubber Products
High-performance inorganic pigment with excellent color stability, weather resistance, and broad application range.
Precision Colorants for the Global Rubber Industry
Deqing Demi Pigment Technology Co., Ltd. supplies high-purity inorganic pigments to manufacturers of technical rubber goods. Our production standards ensure that the pigments do not contain trace metallic impurities (such as copper or manganese) that can catalyze the oxidative aging of rubber. We understand the physical demands placed on rubber products, and our pigments are designed to maintain their tinting strength and saturation even under continuous mechanical stress and environmental exposure.
Rubber Manufacturing Applications
- Automotive Components: Pigmentation for seals, gaskets, and engine mounts.
- Industrial Rubber Goods: Conveyor belts, hoses, and anti-vibration mats.
- Footwear Industry: Coloring for outsoles and midsoles in athletic and industrial shoes.
- Synthetic Turf: Pigments for SBR and EPDM infill and backing materials.
Rubber Grade Technical Specifications
| Technical Property | Typical Value | Standard |
| Heat Resistance (C) | 180 - 200 | Internal Standard |
| Copper (Cu) Content (ppm) | Max 50 | ICP-OES |
| Manganese (Mn) Content (ppm) | Max 100 | ICP-OES |
| Moisture Content (%) | Max 0.5 | ISO 787-2 |
| Oil Absorption (g/100g) | 25 - 40 | ISO 787-5 |
Critical Performance for Elastomers
- Chemical Inertness: Does not interfere with sulfur or peroxide curing systems.
- Low Impurity Levels: Specifically controlled to prevent the premature degradation of the polymer chain.
- High Heat Stability: Maintains color integrity during long-duration steam or press curing.
- Anti-Migration: Pigments are non-bleeding, ensuring color stays fixed in multi-colored rubber assemblies.
Q: Do these pigments affect the shore hardness of the rubber?
A: No, when used at standard concentrations (2–5%), these inorganic pigments act as passive fillers and do not significantly alter the hardness or tensile properties of the rubber.
Q: Are they suitable for silicone rubber?
A: Yes, many of our grades are compatible with silicone bases, though we recommend our high-temperature series for systems requiring curing temperatures above 200∘C.
Rubber Application Support
We utilize specialized grinding technology to ensure that the pigment particles are fine enough to disperse easily in high-viscosity rubber mixers like Banbury or two-roll mills.
Compounding Consultation: Our technical team provides guidance on pigment-to-filler ratios, helping customers achieve the desired hue while optimizing the cost of the rubber compound. We can also provide data on the aging characteristics of colored rubber samples.
Managing Color Shift in Vulcanization
The color of a rubber compound often changes between the "green" (unvulcanized) state and the final cured state. We use spectrophotometry to map this color shift, providing our customers with a "pre-correction" formula. By measuring the CIELab coordinates before and after curing, we ensure that the final product reaches the exact target shade (ΔE<1.0), accounting for the refractive index changes that occur as the rubber matrix cross-links.
About Demei
Demei Chemical Co., Ltd. specializes in the research, development, and production of inorganic iron oxide pigments. With over a decade of experience in the field, we have established ourselves as a leading manufacturer with advanced production facilities and a dedicated R&D team.
We are China Custom Pigments Powder for Rubber Products Manufacturers and Wholesale Pigments Powder for Rubber Products Suppliers, Factory. Our comprehensive pigment range includes iron oxide red, yellow, black, brown, green, orange, and blue. We produce high-performance and high-stability composite iron oxide pigments with three specialized series: Standard, Micronized, and Low Heavy Metal Content levels.
Our products are exported to more than 30 countries and regions worldwide, serving diverse industries including construction, coatings, plastics, rubber, ceramics, and paper. We pride ourselves on consistent quality, excellent color properties, and reliable technical support for our global clients.
R&D Excellence
Continuous investment in research and development ensures technological leadership. Our R&D center focuses on innovative pigment formulations and application technologies.
Advanced Manufacturing
State-of-the-art production facilities with automated control systems ensure consistent quality and large-scale production capacity of over 50,000 tons annually.
Quality Assurance
Strict quality control at every production stage. Certified to ISO 9001:2015, our pigments meet international standards for color consistency and performance.
Global Reach
Extensive distribution network across Asia, Europe, Americas, and Africa. We provide customized solutions and technical support for diverse market requirements.
Core Products
We provide a full range of high-quality inorganic iron oxide pigments, widely used in building materials, coatings, plastics, rubber, ceramics and other industries.
Product Series
We offer three specialized series of iron oxide pigments to meet diverse industry requirements and application scenarios
Standard Series
Conventional particle size iron oxide pigments suitable for most industrial applications. Excellent dispersibility and tinting strength with high cost-performance ratio.
Micronized Series
Ultra-fine particle size with uniform distribution. Ideal for high-end coatings, plastics, and applications requiring superior fineness and smooth finish.
Low Heavy Metal Series
Strictly controlled heavy metal content meeting international environmental standards. Suitable for toys, food packaging, and safety-sensitive applications.
Social Responsibility
Demei not only contributes to production and operation, but also faithfully fulfills its social responsibilities, protects the ecological environment, strengthens safe production, and cares for the health of employees.
Environmental Protection
Implementing green production processes, reducing waste emissions, and actively promoting circular economy principles.
Safe Production
Comprehensive safety management system ensuring controlled and secure operations throughout the production process.
Employee Health
Providing healthy working environments, regular health check-ups, and focusing on physical and mental well-being of our employees.
Community Contribution
Active participation in community development, supporting educational initiatives, and giving back to society.
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Phone
86-572-8035379
86-13666526593 -
Hours
Monday-Friday: 9am to 6pm
Saturday, Sunday: Closed -
Address
20th Floor, Mibei Chuanggongchang No. 650 Yunxiu South Road, Deqing County, Huzhou City, Zhejiang Province, China(Sales Office)
