Name: Kaolin for Fiberglass
Brand: Darson

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

< 1.3%

Iron (Fe₂O₃)

Critical for E-glass electrical properties and color control.

36%

Alumina (Al₂O₃)

Provides chemical durability to the glass fiber structure.

Stable

Chemistry

Uniform mineralogy stabilizes the furnace melting process.

Our Product Solutions for Fiberglass

RECOMMENDED

High Grade

UT-WHITE Series

Low iron content and high purity make it the ideal choice for E-Glass manufacturing.

Fe₂O₃< 1.3%

Al₂O₃36.0%

Moisture< 2%

Download Spec Sheet

Standard Grade

UT-CLAY Series

Suitable for general C-Glass or fiberglass insulation where extreme electrical purity is less critical.

Fe₂O₃1.5%

Al₂O₃36.0%

SiO₂48.5%

Download Spec Sheet

Premium Grade

UT-ULTRA Series

Calcined kaolin for specialized applications requiring ultra-low moisture and maximum stability.

Fe₂O₃< 1.0%

Al₂O₃High

LOI0%

Download Spec Sheet

Frequently Asked Questions

Why is low iron important?

Iron is conductive and causes discoloration (green/brown tint). For E-Glass (Electrical Grade), low iron is crucial to maintain insulation properties and clarity.

What type of glass uses kaolin?

It is primarily used in E-Glass (for circuit boards and reinforcement) but is also used in C-Glass (chemical resistant) and general fiberglass insulation.

How is it delivered?

We typically supply in dry powder form, packed in 50kg bags or 1-ton Jumbo Bags, ready for silo storage and automated feeding systems.

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Factory direct pricing for local and international orders.

DARSON CO., LTD
Kampaengsaen, Nakhon Pathom, Thailand