Product Introduction
Heavy calcium carbonate– crafted by grinding premium natural carbonate minerals (calcite, marble, limestone) – stands out as a highly versatile powdered inorganic filler. Its competitive edge lies in a suite of superior properties: exceptional chemical purity, strong inertness, outstanding resistance to chemical reactions, and excellent thermal stability (maintaining integrity below 400℃). It also offers high whiteness, low oil absorption, low refractive index, soft texture, dry composition (no crystal water), low hardness (low abrasion), non-toxicity, odorlessness, and top-tier dispersibility. These traits drive its broad adoption in industries ranging from rubber, plastics, paints, and water-based coatings to papermaking, concrete, and fireproof ceiling materials.
Specification
Common sizes are 100mesh,200mesh, 325 mesh, 400mesh,600 mesh,800mesh, 1250 mesh, 1500mesh,2500mesh,4000mesh,5000mesh,We also accept customization if you need.
Chemical indicators
Calcium content | Residue on sieve | pH | Whiteness | Moisture | Clinching point (d100) |
98.6% | 0.005 | 9 | 94.2 | 0.18 | 11. 11 |
Ground calcium carbonate325 technical parameter table, if you need other indicators, please send an inquiry.
Product Usage
Rubber/Plastics/ Paints,/Water-based coatings,/Papermaking/ Concrete/Fireproof ceiling materials.
Industrial-grade heavy calcium carbonate is a widely used functional filler in the paint and coating industry, playing a critical role in improving product performance, reducing production costs, and enhancing formulation stability. As a naturally occurring mineral processed into fine particles, it offers excellent whiteness, chemical stability, and dispersibility, making it an essential raw material in modern coating systems.
In paint formulations, heavy calcium carbonate primarily functions as an extender pigment. It helps increase the volume of paint without significantly increasing cost, allowing manufacturers to optimize raw material usage while maintaining high-quality performance. Its fine particle size ensures smooth dispersion within resin systems, which contributes to a uniform coating structure and improved surface finish.
One of the key benefits of industrial-grade calcium carbonate in coatings is its ability to improve opacity and brightness. When properly formulated, it enhances the whiteness and covering power of paints, reducing the need for high-cost titanium dioxide in certain applications. This makes it particularly valuable in decorative paints, primers, and industrial coatings where cost efficiency is important.
In addition to optical performance, heavy calcium carbonate also improves the mechanical properties of coatings. It enhances film hardness, abrasion resistance, and scratch resistance, helping the coating withstand physical wear and environmental exposure. This makes it suitable for both indoor and outdoor applications, including architectural coatings, industrial protective coatings, and automotive finishes.
Another important function is its contribution to rheological control. By adjusting viscosity and flow properties, calcium carbonate helps improve application performance, ensuring smooth brushing, rolling, or spraying without sagging or dripping. This improves user experience and application efficiency in construction and manufacturing environments.
Furthermore, industrial-grade calcium carbonate is chemically stable and non-reactive, ensuring compatibility with various resin systems such as acrylics, alkyds, epoxies, and polyurethanes. This versatility allows formulators to use it across a wide range of coating products without compromising stability or shelf life.
Overall, industrial-grade heavy calcium carbonate is an indispensable material in paint and coating formulations. Its combination of cost efficiency, performance enhancement, and formulation flexibility makes it a key component in modern coating technology.
Industrial-grade heavy calcium carbonate is a widely used reinforcing filler in the rubber industry, playing a significant role in improving the strength, durability, and processing performance of rubber products. Its fine particle structure, high purity, and stable chemical properties make it an ideal additive for a variety of rubber-based industrial applications.
One of the primary benefits of heavy calcium carbonate in rubber compounding is its ability to enhance mechanical strength. When incorporated into rubber matrices, it acts as a reinforcing filler that improves tensile strength and hardness. This results in rubber products that are more resistant to deformation under mechanical stress, making them suitable for demanding industrial environments.
Durability is another key improvement provided by calcium carbonate. It increases abrasion resistance, helping rubber products withstand friction and wear over long periods of use. This is particularly important for products such as conveyor belts, seals, gaskets, tires, and industrial hoses, where continuous mechanical stress is common.
In addition to strength and wear resistance, industrial-grade calcium carbonate also improves dimensional stability. It helps reduce shrinkage and deformation during processing and curing, ensuring that rubber products maintain their intended shape and performance consistency. This is critical for precision components used in automotive and machinery applications.
From a processing perspective, heavy calcium carbonate improves compound handling and mixing behavior. It enhances filler dispersion within the rubber matrix, leading to more uniform material properties. It also helps reduce compound viscosity, making the manufacturing process smoother and more energy-efficient.
Another important advantage is cost optimization. By partially replacing more expensive rubber polymers and additives, calcium carbonate helps reduce overall production costs without significantly affecting performance. This makes it a highly economical solution for large-scale industrial rubber manufacturing.
Furthermore, industrial-grade calcium carbonate is chemically stable and compatible with various rubber systems, including natural rubber and synthetic rubbers such as SBR, NBR, and EPDM. This versatility allows it to be used in a wide range of applications without affecting chemical stability or product lifespan.
In conclusion, industrial-grade heavy calcium carbonate is a vital functional filler in the rubber industry. It significantly enhances strength, durability, processing efficiency, and cost-effectiveness, making it an essential material in modern rubber and industrial product manufacturing.
Polished pebbles are natural-collected stones processed via mechanical grinding and polishing to get a smooth, glossy surface. They keep the pebbles’ natural shape while gaining an artistic new life. With high aesthetic value and artistry, they’re mainly used in decoration and quality-of-life fields: indoor decoration & display, aquarium landscaping, bathroom decor, indoor fountain and small artificial water feature decoration, plus as an excellent material for crafts like paperweights, candlesticks, photo frames and creative ornaments.
Washed Kaolin is produced by mixing raw kaolin with water to form a slurry, which then undergoes sedimentation for purification and is finally dried. This process yields a refined mineral that retains the essential properties of kaolin. It is characterized by its whiteness, cost-effectiveness, good fluidity, stable chemical properties, and a large surface cation exchange capacity. As a high-performance filler, it is extensively used in coatings and paints. It is also a key material in the manufacturing of firebricks, alumina-silica fiber, as well as in cosmetics and pharmaceutical products.
Vitrified perlite specifically designed for insulation mortar and plaster systems. Ensures consistent thermal performance, reduced cracking, and improved application efficiency for construction projects.
White vermiculite originates from natural magnesium-aluminum silicate rocks. Formed via geological processes like magmatism or metamorphism, it’s mined, then crushed and sorted to remove impurities, with high-quality deposits in South Africa, the US, and China.
Nakhi Bentonite is a high-quality clay mineral with excellent adsorption and swelling properties. It’s widely used in water treatment, oil drilling, and soil improvement. Its fine particle size and high cation exchange capacity ensure strong performance in various industrial and environmental applications.
High-performance colored flakes specifically engineered for architectural coatings. Exceptional fade resistance and durability in harsh environmental conditions.Naturally dyed rock flakes, environmentally friendly, and available in custom colors.
Glass flakes are high-performance flaky glass fillers designed to boost anti-corrosion, wear resistance and barrier capabilities. Featuring a typical thickness of 2–10μm and diameter of 100–3000μm, they form a "labyrinth effect" in coatings/linings, which effectively stops corrosive media from penetrating and prolongs the service life of industrial equipment and structures.
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