Industrial Applications

Kaolin for Rubber

Reinforcing durability, stiffness, and reducing costs in tires and mechanical goods.

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Kaolin for Rubber

In rubber compounding, fillers are essential for performance and cost control. While Carbon Black offers high reinforcement, it is expensive and limited to black products.

UT-WHITE acts as a functional semi-reinforcing filler (Soft Clay). Its plate-like structure creates a "tortuous path" within the rubber matrix. This blocks crack propagation, improves air retention (permeability), and increases stiffness (modulus) at a significantly lower cost than Carbon Black or Precipitated Silica.

  • Increases Stiffness (Modulus)
  • Improves Abrasion Resistance
  • Excellent Air Barrier (Inner Liners)

Crack Propagation Blocking

CRACK FORCE Kaolin plates divert and stop cracks

Platelet structure creating a barrier against stress

Performance Characteristics

High Modulus

Increases the stiffness and hardness of the rubber compound.

Low Permeability

Platelet barrier reduces air passage, ideal for tire inner liners.

Cost Savings

Significant savings when replacing partial Carbon Black or Silica.

Recommended Grades

Grades selected for rubber and tyre compounding, improving mechanical properties, reducing permeability, and lowering compound costs.

UT-WHITE High Brightness Kaolin

UT-WHITE

A natural hydrous kaolin with 96.6% ISO brightness, ground to D50 4.571 µm using alumina ball milling to prevent iron contamination. UT-WHITE functions as a functional semi-reinforcing filler in rubber compounding — improving modulus, abrasion resistance, and air barrier properties while lowering compound cost versus carbon black or precipitated silica.

Brightness96.6%
SiO272.2%
Al2O313.7%
pH Value8.0
Oil Adsorption (g/g)0.468
Median Size (D50)4.571 μm
Particle Size400-1200 Mesh
Download Spec Sheet
UT-WASH Precision Kaolin
Coming Soon

UT-WASH

A washed, ultra-clean grade for technical rubber goods and tyre inner liners where low ionic contamination is critical. Consistent particle geometry contributes to uniform dispersion throughout the rubber matrix.

ProcessPrecision Washing
Target GritZero (0.000% on 400 Mesh)
Target WhitenessHigh (94%+)
Purity LevelLess Contamination
Primary UseCeramics & Precision Coatings
Request Early Access
UT-ULTRA Calcined Kaolin
Coming Soon

UT-ULTRA

Our upcoming calcined grade with near-zero metallic impurities, engineered for high-performance technical rubber where maximum compound purity and dimensional stability under heat cycling are required.

ProcessFull Calcination
Target WhitenessExtremely High
Target QualityMedical Grade Sterile
Impurity LevelZero Contamination
Primary UseHigh-Performance Technical Rubber
Request Early Access

Start Your Inquiry

Factory direct pricing for local and international orders. Darson exports kaolin FOB Bangkok to buyers across Thailand, Bangladesh, Malaysia, India, and Southeast Asia.

We will contact you back as soon as possible.

Inquire: sales@darson.co.th
Have a chat: +66 65 393 2426
Come visit: Nakhon Pathom, Thailand
Darson