Advantage
Superior Thermal Stability
With a high melting point and excellent heat resistance, it serves as a stable inorganic filler for flame-retardant polymers and high-temperature industrial coatings.
Low Oil Absorption
Its low oil demand allows for significantly higher filler loading in resins and plastics, effectively reducing overall formulation costs while maintaining workability.
Mechanical Reinforcement
The high rigidity and needle-like crystal structure (where applicable) enhance the tensile strength and dimensional stability of composite materials and rubber parts.
Chemically Inert & Non-Toxic
Highly resistant to chemical erosion and non-reactive with organic binders, ensuring a long shelf-life and consistent performance in complex chemical environments.
Product Parameters
| Analysis Items | Industrial Grade (Desiccant) | Polymer Grade (Super-fine) |
|---|---|---|
| Main Content (CaSO4) | ≥ 99.0% | 99.2% min |
| Free Water (H2O) | ≤ 0.3% | ≤ 0.2% |
| Whiteness | ≥ 93% | ≥ 96% |
| Oil Absorption (g/100g) | 18 - 25 | 22 - 28 |
| Average Particle Size | 325 - 600 Mesh | 800 - 1250 Mesh |
| Density (g/cm³) | 2.96 | 2.96 |
Applications
- Moisture Scavenger for Polyurethan : Prevents the formation of CO2 bubbles in PU coatings, adhesives, and sealants by effectively scavenging trace moisture, ensuring a smooth and defect-free finish.
- Industrial Gas & Solvent Drying : Used as a high-performance desiccant in laboratory and industrial columns to remove water from organic solvents, air, and technical gases.
- Polymer Matrix Reinforcement : Acts as an inorganic filler in thermosetting plastics and high-performance composites to increase heat deflection temperature (HDT) and reduce shrinkage.
- Pesticide & Fertilizer Carrier : Functions as a chemically inert and moisture-stable carrier for concentrated pesticides and specialized agricultural chemicals.
- Precision Investment Casting : Added to casting investment formulations to provide better thermal expansion control and high-temperature resistance.
Packaging & Logistics
Packaging
- 25kg bags (PE/PP woven bags)
- 5kg / 10kg / 20kg bags available on request
- 1000kg / 1250kg jumbo bags (industrial bulk)
- OEM packaging supported (logo, design, private label)
Shipping
- Sea freight (FCL / LCL bulk orders)
- Air freight (small urgent orders)
- Land transport (regional delivery)
Delivery Time
- Sea freight: 20–35 days depending on destination
- Air freight: 5–10 days for urgent orders
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Why Choose Us
Large Production Capacity
Annual capacity reaches 100,000–150,000 tons, supporting a stable bulk supply for key chemical products.
Exported to 78 Countries Worldwide
We have supplied 489+ B2B buyers across 78 countries, with proven global shipping and trade experience.
ISO Certified Quality Management System
Production follows ISO9001, ISO22000, and ISO45001 standards, with SGS and TUV testing for quality consistency.
Professional Export Team Support
Our 20+ member foreign trade team ensures fast response, technical support, and full pre-sales and after-sales service.
FAQ
Q: Can the particle size (mesh) be customized?
A: Yes. We provide various grades ranging from coarse granules to fine powders (e.g., 200 mesh, 325 mesh, or 800 mesh) to suit different manufacturing requirements.
Q: What is the shelf life?
A: Under perfect dry and sealed conditions, it can last 12 to 24 months. However, once the bag is opened, it should be used immediately to avoid moisture absorption from the air.
Q: Is it considered a hazardous material for shipping?
A: No. Calcium Sulfate is generally classified as non-hazardous and non-toxic for international sea and land transportation.
Q: Are there any safety precautions for workers?
A: It is a fine powder that can create dust. Workers should wear dust masks, safety goggles, and gloves to prevent irritation of the eyes and respiratory system during handling.
Q: Can I get a sample for quality verification?
A: Yes, free samples (usually 500g–1kg) are available for laboratory testing. We provide the Certificate of Analysis (COA) with the sample to confirm the purity and whiteness levels.
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