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Polywhite B
Polywhite B Chinaclay, commonly known as Chinaclay, is a naturally occurring, fine white clay mineral primarily composed of kaolinite. It is highly valued for its purity, whiteness, and fine particle size, making it suitable for a variety of industrial applications. Polywhite B improves texture, opacity, and durability in products and is widely used in ceramics, paper, paints, and rubber industries.
Polywhite B (Chinaclay)
Primary Uses
- Ceramics Industry
- Used as a key raw material in porcelain and fine china production.
- Enhances whiteness, strength, and plasticity of ceramic products.
Improves thermal stability and firing characteristics.
- Paper Industry
- Acts as a coating and filler to improve paper brightness, smoothness, and printability.
- Enhances opacity and reduces ink absorbency.
- Paints and Coatings
- Used as an extender and pigment in paints to improve whiteness and consistency.
- Increases durability and resistance to abrasion.
- Rubber Industry
- Functions as a reinforcing filler to improve tensile strength and wear resistance.
- Enhances processing characteristics and reduces production costs.
Secondary Uses
- Cosmetics
- Used as an absorbent and texturizer in powders and facial masks.
- Provides a smooth, matte finish.
- Plastic and Polymer Industry
- Used as a filler to improve mechanical properties and reduce material costs.
- Agriculture
- Employed as a carrier for pesticides and fertilizers due to its inert nature.
- Adhesives and Sealants
- Improves viscosity and texture.
- Improves viscosity and texture.
1. Basic Identification Attributes
- Chemical Name (IUPAC): Kaolinite (Al2Si2O5(OH)4)
- Common/Trade Name: Polywhite B, Chinaclay
- CAS Number: 1332-58-7
- HS Code: 2507.00.00 (Kaolin and other kaolinic clays)
- Synonyms: China clay, Kaolin
2. Physical & Chemical Properties
- Physical State: Fine powder
- Color: Bright white
- Odor: Odorless
- Particle Size: Generally less than 2 microns
- Specific Gravity: 2.6–2.65
- Chemical Composition: Primarily Al₂O₃·2SiO₂·2H₂O (kaolinite)
- pH: 4.5–6 (in aqueous suspension)
- Moisture Content: Typically <1%
3. Safety & Hazard Attributes
- GHS Classification: Not classified as hazardous
- Toxicity: Non-toxic; inert material
- Dust Hazard: May cause respiratory irritation if inhaled in high concentrations
- Carcinogenicity: Not classified as carcinogenic
4. Storage & Handling Attributes
- Storage Conditions: Store in a dry, cool place away from moisture
- Container Type: Supplied in bags or bulk containers
- Shelf Life: Indefinite if stored properly
- Handling Precautions: Use dust control measures; wear masks in dusty environments
5. Regulatory & Compliance Attributes
- Complies with applicable industrial standards for kaolin clay
- Approved for use in cosmetics and food contact applications (subject to purity)
6. Environmental & Health Impact
- Biodegradability: Naturally occurring mineral, inert and non-biodegradable
- Ecotoxicity: Low environmental impact
- Bioaccumulation: Not applicable
- Carcinogenicity/Mutagenicity: Not hazardous
Safety Handling Precautions
- PPE Required: Dust mask, gloves, and eye protection when handling powder
- Handling Guidelines: Avoid inhalation of dust; use ventilation and dust extraction
- Storage Measures: Keep containers sealed and dry
First Aid Measures
- Inhalation: Move to fresh air; seek medical attention if respiratory irritation occurs
- Skin Contact: Wash with soap and water; no adverse effects expected
- Eye Contact: Rinse thoroughly with water; seek medical attention if irritation persists
- Ingestion: Not toxic; rinse mouth if ingested accidentally
Firefighting Measures
- Fire Hazards: Non-flammable
- Extinguishing Media: Use standard firefighting procedures for surrounding materials
- Special Precautions: None specific to material
- Hazardous Combustion Products: None
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Calcined Kaolin
Calcined Kaolin is a fine, white to off-white powder produced by heating natural kaolin clay to high temperatures (typically between 600°C and 900°C) in a controlled process called calcination. This thermal treatment removes chemically bound water, changes the crystalline structure, and enhances the physical and chemical properties of kaolin. The resulting product exhibits increased brightness, hardness, and opacity, making it highly valuable as a functional additive and filler in numerous industrial applications. Calcined Kaolin is widely used in coatings, ceramics, plastics, rubber, paper, and paint industries to improve durability, brightness, and performance.
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Kaolin
Kaolin is a naturally occurring, fine white clay mineral primarily composed of kaolinite. It features a soft, powdery texture and excellent absorbency. Kaolin is widely used across ceramics, paper, rubber, paint, and cosmetics industries due to its chemical inertness, whiteness, and plasticity. It acts as a filler, coating agent, and extender to enhance product quality and performance.
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