Semi-amorphous organogenic limestone of sedimentary origin with high purity and whiteness. Used in rigid and plasticized PVC for low absorption in relation to high fineness. Also used in rubber, in high quality water-based paints, enamels, cementites and in the paper industry.

Typical values
    Microcarb SB Microcarb SM
Specific gravity g/cm3 2,7 2,7
Median particle size (d50) μ 2.2 1.9
Specific surface area (BET) m2/g 3.6 3.8
Bulk density (tamped) g/cm3 0.90 0.87
Sieving residue at 44 μ % < 0.01 < 0.01
Main applications
  • PVC and HFFR cable compounds
  • Thermoplastic and elastomeric compounds
Technical sheet Microcarb SB

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Technical sheet Microcarb SM

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Other products


Magnesium hydroxide

Hydrofy is the trademark of our Magnesium Hydroxide flame retardant fillers. Hydrofy allows the production of Halogen Free Flame Retardant (HFFR) compounds with a very low emission of smoke.


Magnesium carbonate

Magfy is the trademark of our Magnesium Carbonate obtained from high-purity Magnesite. Magfy is used as a flame retardant filler for halogenated polymers.


Magnesium based blend

Hydromix is the commercial name of the range of Magnesium Hydroxide (Hydrofy) – and Magnesium Carbonate (Magfy) – based flame retardant blends produced by Nuova Sima.

Some news from our company

EPD Carbon Footprint

Nuova Sima has obtained the EPD Carbon Footprint Certificate

Wire 2022, Düsseldorf

Nuova Sima will be there!

Alufy ECO 2

A green revolutionary product presented at cables 2022 in köln