Rotomolding solutions to improve quality while lowering costs

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Excellent compound quality

Omya solutions provide excellent rotomolding compound quality with a fine-tuned particle size distribution and our treatment technology.


In the final rotomolded articles, typical calcium carbonate levels range from 5% up to 30%, depending on the final product.


The dispersion of calcium carbonate in the pulverized micropellet is optimal, a crucial property for the rotomolding process. 

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Reduce rotomolding cycle times

The addition of Omya calcium carbonate reduces the overall cycle time of the rotomolding process by shortening the cooling time.


This happens because calcium carbonate has a 6 times higher thermal conductivity than MDPE. For every percent of mineral added, the overall cycle time can be reduced by approximately one percent.

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Enhance product properties and performance

Omya’s fillers improve stiffness and environmental stress cracking resistance (ESCR) which allows the reduction of wall thickness of the end articles and saves material costs.


Omya solutions for rotomolding enhance the isotropic shrinkage, reduce the warpage and increase the dimensional stability of parts.


Replacing polymer resins with calcium carbonate for rotomolding allows for substantial material cost benefits in addition to significant carbon footprint benefits.

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  • Cost reduction
  • Reduced carbon footprint
  • Reduced cycle time
  • Increased stiffness and environmental stress cracking resistance (ESCR)

Talk to an Expert

If you would like some advice about how Omya’s calcium carbonate can support you in masterbatch production, you can speak to our expert team.

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