Lime-based fillers, precipitated calcium carbonates and mineral products are indispensable in the plastics industry. They improve mechanical properties, regulate viscosity and optimise rheology. They increase thermal stability and enable uniform processing in extrusion and injection moulding processes – for a uniform surface appearance. In addition, they contribute to cost optimisation without compromising quality and are compatible with a wide range of polymer types – from PE, PP and PVC to SMP and PU systems. Lime products thus enable efficient, stable and economical plastic formulations.
The products of the Calmit Group are specially tailored to the requirements of the plastics industry – from thermoplastics and elastomers to compounds and masterbatches.
Areas of application in plastics and polymers
Highly reactive ultrafine micronized calcium oxide is used as a drying agent in the compounding mix. This product range is very reactive due to its very narrow particle size distribution.
PCC acts as a functional filler, improving the mechanical properties and appearance of various rigid plastics, particularly PVC. Precipitated calcium carbonate (PCC) is a key filler for thermoplastics. It increases the stiffness of materials, reduces costs by replacing more expensive additives such as dispersing agents or impact modifiers, and enables uniform extrusion. PCC is used for elastomers and rubber to increase abrasion resistance, improve edge stability and support vulcanisation. In compounds and masterbatches, PCC serves as a carrier material, improving dispersibility and enabling homogeneous colour mixtures. Precipitated calcium carbonate also ensures high whiteness, excellent surface finish and high gloss, making it particularly attractive for applications in construction profiles, packaging, and films. In addition, PCC influences melt viscosity, reduce thermal conductivity and contribute to higher energy efficiency by enabling faster cycle times during processing.
Our product solutions for the plastics industry
Do you develop compounds, produce films, profiles, packaging or technical plastic parts? The optimal product selection depends on your production processes and requirements. Our sales staff will be happy to advise you on selecting the right product.
- High-quality precipitated calcium carbonate products (PCC) for PE, PP and PVC applications – with defined particle size ranges and high purity to improve the mechanical properties and appearance and to reduce the amount of more expensive additives.
- Finest calcium oxides and hydroxides (fine lime and hydrated lime) for special applications, e.g. as functional additives in polymer chemistry.
- Mineral fillers with precise particle distribution – for compounds, masterbatches, rubber and engineering plastics.
