What Is Filler Masterbatch?

Filler masterbatch is a concentrated compound typically containing calcium carbonate, a carrier resin and selected additives. It allows plastic manufacturers to introduce mineral filler into their production process in a controlled and convenient form.

Why Calcium Carbonate Quality Matters

The calcium carbonate represents a major component of the formulation. Inconsistent mineral quality can affect extrusion stability, dispersion, filtration, surface finish and final-product performance.

Important Selection Criteria

Particle-Size Distribution

A controlled particle-size distribution can support better dispersion and reduce the presence of oversized particles.

Surface Treatment

Stearic-acid-coated calcium carbonate is commonly used to improve compatibility with PP or PE carrier systems.

Moisture Content

Excessive moisture may contribute to processing instability and product defects. Storage and packaging are therefore important.

Whiteness

Whiteness is particularly relevant when the masterbatch is intended for light-coloured or visually sensitive applications.

Batch Consistency

Stable specifications help compounders maintain predictable recipes and processing parameters.

Typical End Uses

Calcium carbonate filler masterbatch can be used in woven sacks, films, injection moulding, extrusion and other plastic applications, subject to formulation suitability.

CarboCore supplies selected calcium carbonate grades for masterbatch and compound producers, supported by technical documentation, shipment testing and suitable industrial packaging.