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Established in 2005, Arosha Powder is a direct from mine manufacturer of Coated Calcium Carbonate 1250 Mesh, surface-treated with pharmaceutical-grade stearic acid to deliver excellent dispersion, superior hydrophobicity, low oil absorption, and outstanding compatibility with PVC, polyethylene (PE), polypropylene (PP), EVA, rubber, and masterbatch formulations.
With four exclusive high-purity limestone mines, ISO 9001:2015 certified production facilities, and rigorous quality control on every production batch, we supply export-grade calcium carbonate trusted by manufacturers across more than 20 countries.
| Parameter | Specification |
|---|---|
| Chemical Composition | Calcium Carbonate (CaCO₃), surface-coated with stearic acid |
| CaCO₃ Purity | ≥ 98.5% |
| Whiteness | ≥ 95% |
| Brightness | ≥ 94% |
| Moisture | ≤ 0.2% |
| Oil Absorption | ≤ 18 g/100g |
| Bulk Density | 0.8–1.0 g/cm³ |
| Specific Gravity | 2.7 g/cm³ |
| Surface Treatment | Pharmaceutical-grade stearic acid coating |
| Mesh Size | 1250 Mesh |
| D50 | ~5 µm |
| D97 | ~15 µm |
| Particle Shape | Regular, uniform, low-angularity |
| Packaging | 25 kg bags, jumbo bags, or OEM packaging |
| Quality Standards | ISO 9001:2015, batch-tested COA available on request |
Note: Values above are representative for the 1250 Mesh grade; exact figures may vary slightly by production batch and are confirmed on each Certificate of Analysis (COA).
| Factor | 400 Mesh | 800 Mesh | 1250 Mesh | 2500 Mesh | 3000 Mesh (optional) |
|---|---|---|---|---|---|
| Average Particle Size | Coarsest | Medium-coarse | Medium-fine | Fine | Ultra-fine |
| Surface Area | Lowest | Low-medium | Medium | High | Highest |
| Dispersion | Basic | Good | Excellent | Superior | Maximum |
| Surface Smoothness | Low | Moderate | Good | High | Nano-like |
| Mechanical Reinforcement | Basic | Moderate | Balanced | Strong | Strongest |
| Gloss | Low | Moderate | Good | High | Premium |
| Processing | Easiest, high-throughput | Easy | Smooth, stable | Requires tighter control | Most demanding |
| Cost Efficiency | Highest | High | Balanced | Lower | Lowest |
| Typical Industries | Basic pipe, low-cost compounds | General PVC, woven bags | PVC compounds, masterbatch, film | Premium film, high-end masterbatch | Engineering plastics, luxury surfaces |
1250 Mesh sits at the balance point of the range fine enough for strong dispersion and surface quality, while remaining cost efficient compared to the 2500 and 3000 Mesh grades.
1250 Mesh gives PVC compounders a finer, more uniform filler than coarser grades, resulting in smoother pipe and fitting surfaces, fewer visible defects, and more consistent mechanical properties across production runs.
The controlled particle size and stearic acid coating improve dispersion throughout the polymer matrix, supporting stable insulation performance and reducing the risk of weak points in cable sheathing.
Manufacturers can achieve higher filler loading without sacrificing dispersion quality, helping masterbatch producers lower raw material costs while maintaining carrier resin performance.
Finer particle size supports better opacity and a smoother film surface, along with improved printability — important for packaging film where visual quality matters.
1250 Mesh offers a practical balance of stiffness, dimensional stability, and surface finish, making it suitable for a wide range of injection-molded parts without over-specifying to an ultra-fine grade.
The grade supports smooth extrusion and stable tape production, giving woven bag and raffia manufacturers a good balance between processability and cost-performance.
As a functional filler, 1250 Mesh improves tensile strength and processing stability while maintaining even dispersion throughout the rubber compound.
What industries commonly use 1250 Mesh coated calcium carbonate? It’s widely used in PVC compounding, PE/PP masterbatch, plastic film, injection molding, woven bags and raffia, and rubber product manufacturing.
What is the particle size of 1250 Mesh? 1250 Mesh corresponds to a fine-to-medium particle size range, with a D50 of approximately 5 µm, positioning it between 800 Mesh and 2500 Mesh grades.
What polymers is this grade compatible with? It offers strong compatibility with PVC, polyethylene (PE), polypropylene (PP), EVA, rubber, and various masterbatch carrier resins.
Why is stearic acid coating important? The pharmaceutical-grade stearic acid coating improves hydrophobicity, reduces moisture absorption, enhances dispersion within the polymer matrix, and lowers oil absorption.
How does 1250 Mesh compare with 800 Mesh? 1250 Mesh offers finer particle size, better dispersion, and improved surface finish compared to 800 Mesh, while 800 Mesh remains a more economical choice for less demanding applications.
How does it compare with 2500 Mesh? 2500 Mesh delivers finer particle size, higher gloss, and superior surface finish for premium applications, while 1250 Mesh offers a more cost-effective option for standard-to-good performance requirements.
Is this grade suitable for PVC pipes? 1250 Mesh is well-suited to PVC fittings and general PVC compounding; for high-pressure pipe applications, specifications should be confirmed against project requirements.
Is it suitable for PE and PP masterbatch? Yes, its dispersion characteristics support higher filler loading in PE and PP masterbatch formulations while maintaining processing stability.
What is the recommended loading percentage? Recommended loading varies by application and target properties; our technical team can advise on optimal loading based on your specific formulation and end-use requirements.
What packaging options are available? Standard options include 25 kg bags and jumbo bags, with pallet loading and OEM/custom packaging available on request.
Can Arosha Powder supply OEM packaging? Yes, we offer OEM and private label packaging, including custom bag printing and labeling to match your branding requirements.
Which countries do you export to? Arosha Powder currently exports to manufacturers in more than 20 countries worldwide, with established logistics for international shipping.