Limestone Chuna Powder
Whiteness (R457):65% – 75%
Median Particle Size (D50):10 – 18 μm (by mesh)
Sieve Residue (45 μm sieve):≤0.1% – 0.01%
Moisture Content:≤0.3%
Hydrochloric Acid Insoluble:≤0.1% – 0.3%
pH (10% suspension):8.5 – 9.5
Oil Absorption (DBP):20 – 35 ml/100g
Specific Surface Area (BET):0.8 – 2.5 m²/g
16 – 18 μm:≤38 μm
13 – 15 μm:≤32 μm
10 – 12 μm:≤25 μm
Ultra-Fine and High-Performance for Composites
We introduce limestone chuna powder, developed with a focus on ultra-fine particle size and high performance. We use high-quality limestone as the raw material. It is processed through crushing, grinding, and fine classification. This is an ultra-fine ground calcium carbonate product.
Our factory covers over 20 acres and is equipped with advanced production equipment and a professional quality control team. We do not just supply raw materials; we help improve the performance of your composite materials. Our limestone chuna powder is a high-performance product designed for demanding applications.
Key Specifications and Superior Quality
We maintain strict quality control throughout the production process to ensure stable chemical composition and excellent physical properties. The table below shows our key specifications.
The calcium carbonate content ranges from 95.0% to 98.0%. Whiteness ranges from 65% to 75%. The median particle size (D50) varies depending on mesh size. The residue on a 45 μm sieve is very low. Our limestone chuna powder is designed for demanding applications.
|
Test Item |
Technical Parameter Range |
Typical Value (1250 Mesh Example) |
Executive Standard |
|
Calcium Carbonate (CaCO₃) Content |
95.0% – 98.0% |
≥97.5% |
GB/T 19281 |
|
Whiteness (R457) |
65% – 75% |
≥94% |
HG/T 3249.2 |
|
Median Particle Size (D50) |
10 – 18 μm (by mesh) |
10 μm ± 1 μm |
GB/T 19077 |
|
Sieve Residue (45 μm sieve) |
≤0.1% – 0.01% |
≤0.01% |
GB/T 19281 |
|
Moisture Content |
≤0.3% |
≤0.2% |
GB/T 19281 |
|
Hydrochloric Acid Insoluble |
≤0.1% – 0.3% |
≤0.1% |
GB/T 19281 |
|
pH (10% suspension) |
8.5 – 9.5 |
9.0 ± 0.5 |
GB/T 19281 |
|
Oil Absorption (DBP) |
20 – 35 ml/100g |
22 – 26 ml/100g |
HG/T 3249.2 |
|
Specific Surface Area (BET) |
0.8 – 2.5 m²/g |
1.2 – 1.8 m²/g |
GB/T 19587 |
Specification (Mesh Size)
|
Mesh |
Median Particle Size (D50) |
Particle Size (D97) |
45 μm Sieve Residue |
Typical Whiteness |
|
800 mesh |
16 – 18 μm |
≤38 μm |
≤0.1% |
≥90% |
|
1000 mesh |
13 – 15 μm |
≤32 μm |
≤0.05% |
≥92% |
|
1250 mesh |
10 – 12 μm |
≤25 μm |
≤0.01% |
≥94% |
Wide Applications and Simple Process
Our limestone chuna powder is widely used across many industries. It is used in the plastics industry for PVC pipes, profiles, and cable compounds. It is also used in coatings and paints, including interior and exterior latex paints and industrial primers. In the rubber industry, it is used for tires and seals. It is further applied in inks, paper, sealants, and artificial stone.
Our quality is supported by ISO9001, ISO14001, and ISO45001 certifications. We provide free samples of up to 5 kg for testing.
Standard orders are shipped within 3–5 working days after receiving the deposit.
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