LKAB Minerals develops and markets high-density polymers using Magnetite, a natural iron oxide (Fe3O4) with unique properties. MagniF is the brand name for magnetite grades used as fillers in polymers and rubbers. With a density of 5.2 g/cm³, MagniF acts as a functional filler for polymers in a wide range of high‑density applications.

High-density polymers as a functional filler

MagniF is used primarily for its high-density however it is also thermally and electrically conductive, ferri-magnetic and heatable by microwaves. MagniF filled polymers are considered straightforward to compound and mould. MagniF is particularly suitable for sound and vibration damping applications within the automotive industry.

High filler levels can be reached in a great variety of polymers without surface treatment of the filler particles. In a PP a density of over 3 g/cm³ can be reached without problems by extrusion and/or injection moulding. When using inline compounding 3.5 g/cm³ is attainable. High-density compounds are mainly used in sound damping applications.

Increase the density of polymer products with MagniF

With many years of experience in the different applications that benefit from MagniF, LKAB Minerals is able to help you select the right grade for your product.

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