Polywhite B

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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.

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Category: Fillers and Reinforcements Tags: China Clay, Kaolin Clay, Plastic Filler, Polywhite B, Reinforcements, White Mineral Filler

Description

Table of Contents

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.

KEY PRODUCT FEATURES

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

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