Fillers, Coatings & Polymers
Particle size alone does not define performance.
Filler discussions begin with the mineral's required role in the customer's formulation.
Material properties, processing, variability and performance trials precede grade approval.
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Material properties
Size distribution, shape, composition, brightness and moisture are assessed for the required function.
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Joint trials
Customer and technical teams document test conditions, acceptance limits and comparison criteria.
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Grade development
Talc and kaolin are at the research stage; each grade is developed for the formulation it will go into.
What defines suitability
- Polymer/coating system
- Particle specification
- Moisture
- Surface requirement
- Trial protocol
Product & Application Qualification
Define the requirement
Application, chemistry, size, moisture, impurity limits and handling needs are captured in one requirement record.
A controlled trial
A sample represents a defined source, lot and production route, with results reviewed jointly.
Controlled change
Changes in source, processing or critical limits trigger qualification review.
