Micronized Calcium Carbonate Powder — Coated
Mesh 1250 Calcium Carbonate — Coated Powder
MAD KOOHZAD's mesh 1250 micronized calcium carbonate (Coated Powder) is produced with a 11 microns particle size. A precise balance of hardness and strength in technical polymer parts.
Particle Size & Fineness
Particle size of 11 microns (mesh 1250), with a bulk density of 0.9 – 1.1 g/cm³.
Whiteness Index
Whiteness index of 98.6 – 98.9%, suited to formulations sensitive to final color uniformity.
Oil Absorption
19 – 26 g/100g — noticeably lower than the same mesh uncoated version, thanks to the stearic-acid coating.
Stearic-Acid Coating
Coating level of 1.6 – 2.1%, creating a hydrophobic surface compatible with non-polar polymers.
Industrial Applications of Mesh 1250 Calcium Carbonate (Coated Powder)
A precise balance of hardness and strength in technical polymer parts. This grade is primarily used in the following industries: Advanced technical rubber, Automotive interior parts, High-performance masterbatch.
Mineral-base purity: 98.0% – 99.3% (mineral base, before coating) — Moisture: 0.2% max (improved moisture resistance due to the hydrophobic coating) — pH (10% suspension): 8.0 – 9.0 (10% solution). Coating details: Stearic-acid coating at 0.8 – 3.0% by weight (depending on particle fineness), applied through a dry-coating process with precise temperature and mixing-time control for uniform surface coverage. Packaging available: 25 kg bags (moisture-resistant laminate), Jumbo bags (500 – 1,000 kg), Bulk (subject to buyer's suitable equipment).
Comprehensive Analysis of Mesh 1250 Calcium Carbonate (Coated Powder): From Technical Data to Industrial Solutions
In this section, we go beyond the specification sheet and into the strategic depth of mesh 1250 calcium carbonate. Our goal is to show you exactly how every technical parameter on the analysis sheet translates directly into a competitive advantage, a cost reduction, or a quality gain on your production line. This in-depth analysis helps you make the best decision for your business with full confidence.
Beyond an Additive: Mesh 1250 Calcium Carbonate as a Strategic Investment
At MAD KOOHZAD, we don't sell calcium carbonate as a mere raw material; we deliver durable solutions for optimizing your production. Choosing a low-quality or unsuitable calcium carbonate carries hidden risks — weaker mechanical properties, color drift between batches, faster equipment wear, and ultimately, unhappy end customers. Our mesh 1250 product, with its uniform stearic-acid coating and guaranteed purity and tightly controlled particle size, eliminates these risks. This product isn't a cost — it's an investment in stable quality, less waste, and protecting your brand's reputation in the market. We stand beside you to help you reach these goals.
Decoding the Analysis Sheet: What Every Number in the Spec Table Means for Your Business
A technical data sheet (TDS) isn't just a list of numbers — it's a roadmap to your formulation's success. Below, we break down the most important technical parameters of mesh 1250 calcium carbonate:
1. Whiteness index 98.6 – 98.9% — technical significance: impurities such as silica (SiO₂) or iron oxide (Fe₂O₃) can abrade machinery, discolor the final product (especially in white and light-colored formulations), and trigger unwanted reactions. This product's high whiteness means maximum chemical stability and minimal negative impact on your process.
2. Reduced oil absorption (19 – 26 g/100g) — economic significance: the stearic-acid coating occupies the particle's active surface, noticeably lowering oil/resin absorption. This means you'll need less of the expensive resins, lubricants, and plasticizers in your formula — a direct saving that's not possible with uncoated grades.
3. Stearic-acid coating level (1.6 – 2.1%) — functional significance: this coating percentage is engineered for this grade's 11 microns particle size to uniformly cover the full specific surface of the particles — not less (which causes incomplete coverage and weaker dispersion) and not more (which creates needless cost). This means maximum compatibility with non-polar polymers at the lowest possible coating cost.
Specialized Solutions for Mesh 1250: Solving Real Challenges Across Industries
Our mesh 1250 calcium carbonate isn't a one-size-fits-all product — it's a precise solution for specific challenges in the following industries:
High-load masterbatch — Common challenge: Producing high-loading masterbatches without losing melt flow in the extruder or degrading the final film's surface quality. MAD KOOHZAD's solution: Fine particle size combined with the stearic coating creates an optimal surface-to-volume ratio that allows both high filler load and good melt flow together. Result for you: A masterbatch with better economics for end customers, with no loss of processing quality.
Automotive technical parts & advanced rubber — Common challenge: Achieving a precise balance of hardness, strength and final surface in high-tolerance technical parts. MAD KOOHZAD's solution: Fine particle size and uniform coating give tighter control over final mechanical properties and reduce batch-to-batch variability. Result for you: Parts with repeatable quality and better compliance with the customer's technical specification.
Technical FAQ: Mesh 1250 Calcium Carbonate
What exact difference does the stearic-acid coating make to mesh 1250's performance?
Stearic acid chemically bonds to the calcium-carbonate particle surface, creating a hydrophobic layer. This layer lowers particle surface energy and markedly improves compatibility with non-polar polymers such as PE, PP, PVC, and rubber. The direct result is better dispersion, lower oil absorption (19 – 26 g/100g in this grade), and the ability to load more filler without losing mechanical properties.
Is the coated grade more resistant to ambient moisture during shipping and storage?
Yes. The hydrophobic stearic-acid coating means coated calcium-carbonate particles absorb far less ambient moisture than the uncoated version. This is a key advantage especially for export shipments that face long transit routes and variable humidity conditions.
What's the maximum loading percentage for this grade in a polymer compound?
That number depends on the base-polymer type, the process (injection, extrusion, film), and your target mechanical properties. Generally, the stearic coating enables 5–15% higher loading than the same mesh uncoated grade, without a significant loss in impact strength or surface quality. Our technical team can recommend the optimal figure based on your exact formulation.
Can this coated grade also be used in water-based paints or paper?
Coated grades, due to their hydrophobic nature, aren't recommended for water-based systems (water-based paint, paper, water-based adhesives), because the stearic coating can disrupt dispersion in an aqueous medium. For these applications, the uncoated version of the same mesh is the right choice. Coated grades are purpose-built for polymer and non-polar systems (PE, PP, PVC, rubber, cable).
Export packaging — 25 kg laminated bag
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