Calcium Carbonate Powder 2500 Mesh – Coated

Established in 2005, Arosha Powder is a direct from mine manufacturer of Coated Calcium Carbonate 2500 Mesh, engineered for high-performance polymer applications requiring ultra-fine particle size, exceptional dispersion, superior surface smoothness, and outstanding hydrophobicity.

Surface-treated with pharmaceutical-grade stearic acid and manufactured from high-purity limestone sourced from our four exclusive mines, every production batch undergoes strict quality control in our ISO 9001:2015 certified facilities. Today, manufacturers in more than 20 countries rely on Arosha Powder for consistent export-grade calcium carbonate.

Technical Specifications — 2500 Mesh Grade

Note: values above are typical/target specifications and can be adjusted to match your certificate of analysis (COA) template or actual lab data.

Particle Size Profile — 2500 Mesh vs Other Coated Grades

2500 Mesh sits at the point where fineness, dispersion, and gloss potential peak for most commercial polymer applications — finer grades add cost with diminishing returns unless the application specifically demands it.

Where 2500 Mesh Performs Best — Application Specific Guide

Premium Masterbatch Production

Maximum filler loading with excellent dispersion and color consistency, allowing masterbatch producers to raise CaCO₃ content without compromising pigment uniformity or downstream processability.

High-Gloss PVC Products

Superior surface finish for decorative and premium PVC applications, including profiles, sheets, and injection-molded components where visual quality is a key selling point.

Blown Film & Cast Film

Improved opacity, printability, smoothness, and film appearance, helping converters reduce gel counts and achieve a cleaner, more consistent film surface.

Injection Molding Compounds

Enhanced dimensional stability and premium molded surface quality, reducing sink marks and surface imperfections in finished parts.

Engineering Plastics

Better filler distribution and improved mechanical performance in technical compounds where consistency under load is critical.

High-Quality Cable Compounds

Excellent insulation performance and smooth extrusion, supporting the tight tolerances required in wire and cable jacketing.

Premium Rubber Compounds

Improved reinforcement with uniform filler distribution, contributing to more predictable curing and mechanical properties.

Why Manufacturers Choose 2500 Mesh

• Ultra-fine particle size for maximum surface interaction within the polymer matrix
• Excellent particle dispersion, minimizing agglomerates and processing defects
• Higher gloss potential, ideal for visually demanding end products
• Superior surface finish, reducing the need for secondary surface treatments
• Reduced surface defects, including fewer fisheyes, streaks, and roughness
• Lower oil absorption, supporting efficient resin usage
• Better polymer compatibility through pharmaceutical-grade stearic acid coating
• Improved mechanical properties, including impact strength and tensile consistency
• Higher production consistency, batch after batch
• Premium product appearance, supporting brand and quality positioning

2500 Mesh vs. Other Coated Calcium Carbonate Grades — Decision Guide

Choose 2500 Mesh if:

• Premium surface quality is required.
• High-gloss products are your target.
• You manufacture premium masterbatch.
• Excellent dispersion is essential.
• Appearance is as important as mechanical performance.

Consider 400 Mesh instead if:

• Low-cost filler applications are your priority.
• Surface finish is not critical.

Consider 800 Mesh instead if:

• You need economical performance for general-purpose compounds.

Consider 1250 Mesh instead if:

• You need an optimal balance between cost and performance.
• Standard industrial surface quality is sufficient.

Consider 3000 Mesh instead if:

• Maximum fineness is required.
• You produce premium engineering plastics.
• Luxury surface appearance and ultra-high gloss are essential.

Key Performance Benefits of 2500 Mesh

• Better dispersion in polymer matrices, reducing agglomeration and improving batch-to-batch uniformity
• Improved gloss and brightness in the finished product surface
• Enhanced opacity, particularly valuable in films and sheets
• Lower surface roughness, translating to a smoother tactile and visual finish
• Reduced die build-up, keeping extrusion tooling cleaner for longer
• Stable extrusion, with fewer interruptions for cleaning or adjustment
• Improved processing efficiency, supporting higher throughput
• Higher filler loading without sacrificing quality, improving cost-in-use
• Longer equipment cleanliness during production, reducing maintenance downtime

Advantages of Arosha Powder 2500 Mesh

• Direct-from-Mine Manufacturing — full control over raw material quality from extraction to finished powder
• Four Exclusive High-Purity Limestone Mines — consistent, high-purity feedstock secured for long-term supply
• Pharmaceutical-Grade Stearic Acid Coating — precise, uniform surface treatment for reliable hydrophobicity
• Ultra-Consistent Particle Size Distribution — tight D50/D97 control across every batch
• ISO 9001:2015 Certified Manufacturing — documented quality management at every production stage
• Advanced Milling & Classification Technology — precision equipment purpose-built for ultra-fine grades
• Strict Batch-to-Batch Quality Control — full lab testing and traceability on every shipment
• Large Export Capacity — production scale to support ongoing, high-volume international orders
• OEM & Private Label Packaging — custom branding available for distributors and converters
• Reliable Global Logistics — established export processes serving 20+ countries

Packaging & Export Information

Frequently Asked Questions — 2500 Mesh Grade

What industries benefit most from 2500 Mesh coated calcium carbonate? Masterbatch production, PVC processing, film extrusion, injection molding, engineering plastics, cable manufacturing, and rubber compounding all benefit from this grade’s fine particle size and dispersion characteristics.

What is the average particle size of 2500 Mesh? The grade typically has a D50 around 2.0–2.5 μm, with D97 controlled at 5 μm or below.

Why is 2500 Mesh preferred for premium masterbatch? Its fine, well-dispersed particles allow higher filler loading while maintaining color consistency and a smooth, defect-free finish in the final masterbatch.

Is this grade suitable for high-gloss PVC products? Yes. The fine particle size and stearic acid coating support the surface smoothness and gloss levels required in decorative and premium PVC applications.

How does it compare with 1250 Mesh? 2500 Mesh offers finer particle size, higher surface area, and greater gloss and dispersion potential, making it better suited to premium, appearance-critical applications, while 1250 Mesh offers a more cost-balanced option for standard industrial use.

When should I choose 3000 Mesh instead? 3000 Mesh is recommended when maximum fineness and ultra-high gloss are required, such as in luxury finishes or the most demanding engineering plastic applications.

What polymers are compatible with this grade? It is widely used with PE, PP, PVC, and various engineering thermoplastics, as well as rubber compounds, thanks to its stearic acid surface treatment.

What filler loading can typically be achieved? Filler loading depends on the specific polymer system and processing conditions; our technical team can advise on optimal loading levels for your application.

Is pharmaceutical-grade stearic acid used for coating? Yes, all 2500 Mesh material is surface-treated with pharmaceutical-grade stearic acid for consistent, reliable coating quality.

What packaging options are available? 25 kg bags, jumbo bags, and palletized export packaging are all available, along with OEM and private label options.

Can Arosha Powder provide OEM packaging? Yes, custom bag printing and private labeling are available for distributors and converters.

Which countries do you export to? Arosha Powder currently exports to manufacturers in more than 20 countries worldwide.