Mineral Fillers, Pigments & Reinforcement Articles
Concept explainers, comparisons, and how-tos.
Articles
ATH or Magnesium Hydroxide — Choosing a Halogen-Free Mineral Flame Retardant
Processing temperature decides. Aluminium trihydrate releases its water at around 200–220 °C, so it works in PVC, polyolefin cable compounds, EVA and thermoset composites processed below that. Magnesium hydroxide decomposes at around 300–330 °C, so it is…
ReadCoated or Uncoated Talc for Plastics — Which One Your Line Actually Needs
Uncoated talc is the default and is the right buy for most dry-blended, well-mixed polypropylene compounds. A coated talc is worth paying for when you are fighting one of four specific problems: poor feeding and dusting at the hopper, high torque or…
ReadMineral Extenders for Paints, Coatings and Paper — Buying Function, Not Bulk
In a coating or a paper furnish the mineral is not a diluent. It sets opacity efficiency, sheen, rheology, scrub resistance, printability and how much titanium dioxide you can remove without losing hiding power. Choose the extender by the property you are…
ReadMesh, D50 and Top Cut — Reading a Mineral Filler Particle Size Spec
Mesh is a sieve number, D50 is the median particle diameter in microns, and the top cut (D97 or D98) is the coarse tail. For plastics and coatings the D50 tells you how the filler behaves on average, but the top cut is what decides whether you get film…
ReadMineral Powder or Filler Masterbatch — Which Form Should You Actually Buy?
Buy neat mineral powder if you run a compounding line: a twin-screw extruder, gravimetric powder dosing, dust extraction and someone who owns the formulation. Buy a filler masterbatch if you feed an extruder or moulding machine directly: the mineral is…
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