Kaolin for Fiberglass

Fiberglass (E-Glass) requires a precise chemical balance. Iron impurities can discolor the glass and weaken the fibers, which is critical for electrical applications like circuit boards.

Kaolin is a preferred raw material because it provides both Alumina (Al₂O₃) and Silica (SiO₂) in a single, pre-mixed mineral form. Our low-iron content (< 1.3%) helps lower the melting temperature and ensures the structural integrity of the spun glass fibers.

Source of Alumina & Silica
Low Iron Content (< 1.3%)
Improves Melt Flow

From Powder to Fiber

Kaolin provides the Alumina body for the glass melt

Performance Characteristics

Low Iron

Critical for E-glass electrical properties and color control.

High Alumina

Provides chemical durability to the glass fiber structure.

Stable Chemistry

Uniform mineralogy stabilizes the furnace melting process.

Recommended Grades

Grades for fiberglass and composite applications, providing the controlled chemistry and low iron content essential for high-transmission glass fibres.

UT-WHITE

A consistent-chemistry kaolin grade providing reliable SiO₂ and Al₂O₃ ratios for standard fibreglass batch formulations. Low variability batch-to-batch ensures stable melt viscosity and fibre draw consistency.

SiO₂72.2%

Al₂O₃13.7%

Whiteness96.6%

pH Value8.0

Oil Adsorption (g/g)0.468

Median Size (D₅₀)4.571 μm

Particle Size400-1200 Mesh

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Coming Soon

UT-WASH

A low-iron washed grade for high-performance E-glass and ECR fibres. Reduced Fe₂O₃ content minimises glass colouration and improves UV transmission, meeting the strict purity demands of electronics and structural composites.

ProcessPrecision Washing

Target GritZero (0.000% on 400 Mesh)

Target WhitenessHigh (94%+)

Purity LevelLess Contamination

Primary UseCeramics & Precision Coatings

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Coming Soon

UT-ULTRA

Our upcoming ultra-pure calcined grade targeting optical and specialty glass fibre applications where iron content must be near-zero. Designed for solar glass, high-transmission optical fibres, and advanced aerospace composites.

ProcessFull Calcination

Target WhitenessExtremely High

Target QualityMedical Grade Sterile

Impurity LevelZero Contamination

Primary UseOptical & Specialty Glass Fibre

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