Industrial Applications

Kaolin for Polymer Compounding

Structural reinforcement, dimensional stability, and a flawless finish for engineered polymers.

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Kaolin for Polymer Compounding

In advanced polymer compounds, the right mineral filler does more than reduce resin cost — it becomes part of the structural backbone. Without reinforcement, compounds suffer warpage, sagging under heat, and inconsistent surface finish.

UT-WHITE — with a high-silica matrix (SiO₂ 72.2%) and D50 4.571 µm — slots into the polymer melt to act as a reinforcing skeleton. The result is higher heat deflection, greater rigidity, and a smooth final surface — even at elevated filler loadings in PVC, PE, and engineering polymers.

  • Improves dimensional stability & heat deflection
  • Supports high filler loading without melt-flow loss
  • Enhances rigidity & surface finish of molded parts

Structural Reinforcement Mechanism

Unfilled Polymer (Sagging) Warpage & Sag With Kaolin (Reinforced) Dimensional Stability

UT-WHITE platelets reinforce the polymer matrix to resist deformation

Performance Characteristics

High Heat Deflection

High-silica matrix raises the heat-deflection temperature of PVC and PE compounds.

High Filler Loading

Optimized 6.115 µm mean particle size supports heavy loading without compromising melt flow.

Smooth Surface Finish

Reinforces molded parts while keeping a uniform, defect-free surface.

Recommended Grades

Grades engineered for polymer compounding, providing structural reinforcement, dimensional stability, and a smooth surface finish in PVC, PE, and engineering polymers.

UT-WHITE High Brightness Kaolin

UT-WHITE

UT-WHITE is a natural hydrous kaolin with 96.6% ISO brightness, ground to D50 4.571 µm using alumina ball milling to prevent iron contamination. Provides cost-effective mineral reinforcement and whitening in PE, PP, PVC, and rubber polymer compound and masterbatch systems.

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, low-grit grade for polymer compounds where surface quality and zero grit are critical. Consistent particle size distribution prevents extruder wear and surface defects in thin-wall and clear-tinted compounds.

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

UT-ULTRA

Our upcoming calcined grade with maximum brightness and ultra-low metallic content, targeting engineering plastics and medical-grade compounds where purity, mechanical strength, and optical performance are non-negotiable.

ProcessFull Calcination
Target WhitenessExtremely High
Target QualityMedical Grade Sterile
Impurity LevelZero Contamination
Primary UseEngineering & Medical-Grade Plastics
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