Name: UT-WHITE for Rubber
Brand: Darson

Home / Applications / Rubber & Tires

Previous: Ceramics & Tiles Next: Plastics & Masterbatch

Kaolin for Rubber

Kaolin (also called China clay)

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

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-LUMP

Entry-level hydrous kaolin, rotary-screened and sun-dried, as fine powder with small lumps. At 74.3% ISO brightness, a cost-effective choice for ceramic bodies, construction, and agricultural use.

Brightness (ISO)74.3%

Moisture0.51%

Mean Particle Size7.742 µm

D₅₀5.047 µm

Oil Absorption48.0 g/100g

pH7.02

Download Spec Sheet

UT-WHITE

Finely ground hydrous kaolin with 80.3% ISO brightness and a consistent 400-1200 mesh particle size, for smoother, more uniform mixing. A bright, reliable filler for rubber compounds, plastics, paper, and adhesives.

Brightness (ISO)80.3%

Moisture0.33%

Mean Particle Size6.115 µm

D₅₀4.571 µm

Oil Absorption46.8 g/100g

pH8.0

Download Spec Sheet

Coming Soon

UT-WASH

A meticulously refined material developed for technical precision. The specialized washing process eliminates grit to ensure smooth, defect-free production in ceramics where structural integrity is critical.

ProcessPrecision Washing

Target WhitenessHigh (94%+)

Target QualityGrit-Free

Purity LevelReduced Contamination

Request Early Access

Coming Soon

UT-ULTRA

Our upcoming calcined kaolin grade, processed at high temperatures to maximize structural hide and opacity. Designed for specialty industrial applications requiring higher purity and performance.

ProcessFull Calcination

Target WhitenessExtremely High

Target QualityLow-Iron, High-Purity

Purity LevelNear-Zero Impurities

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.

Name

Company

Phone Number

Interested Grade

Message

We will contact you back as soon as possible.