Name: Kaolin for Plastics & Masterbatch
Brand: Darson

Home / Applications / Plastics & Masterbatch

Kaolin for Plastics & Masterbatch

Kaolin (also called China clay)

In plastic compounding, mineral fillers serve two functions: reducing raw material cost by extending expensive resin and TiO₂, and adding physical properties such as stiffness, surface spacing, and brightness.

UT-WHITE hydrous kaolin, with a D50 of 4.571 µm and 80.3% ISO brightness, works as a cost-effective white mineral filler in PVC compounds, PE/PP masterbatch, and film applications. Its platey particle shape creates micro-separation between film layers (anti-blocking), and its filler-grade whiteness makes it a practical partial extender of TiO₂ in white and light-colored masterbatch. In PVC and polyolefin compounding, low oil absorption (46.8 g/100g) supports high loading while keeping melt flow workable.

Anti-blocking filler in PE/PP film applications
TiO₂ extender in white and light-colored masterbatch
Supports high filler loading in PVC and polyolefin compounds

Anti-Blocking Mechanism

UT-WHITE particles create separation between film layers

Performance Characteristics

80.3% ISO Brightness

ISO brightness of 80.3% allows UT-WHITE to extend or partially replace TiO₂ in white masterbatch and light-colored compounds, reducing formulation cost.

Anti-Blocking

Platey particle shape creates micro-roughness on PE/PP film surfaces, preventing layers from sticking together during winding and storage.

Polymer Compatible

Chemically inert and easy to incorporate into PE, PP, PVC, and other common polymer systems at standard compounding temperatures.

Recommended Grades

Grades for plastic compounding and masterbatch, improving stiffness, reducing resin cost, and enhancing surface finish in PE, PP, and PVC applications.

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.