Welcome to Imerys Performance Minerals

Impact, stiffness, dimensional control

Impact, stiffness, dimensional control Imerys minerals for enhanced impact resistance, stiffness and dimensional control in polypropylene and engineering thermoplastics

Imerys minerals – for the best balance of stiffness and impact resistance, and improved dimensional stability in polypropylene and engineering thermoplastics

Imerys minerals make ideal reinforcing fillers in PP, TPO and engineering thermoplastics for applications which require greater stiffness and better dimensional control over a range of temperatures. 

Because of their higher aspect ratio—which leads to excellent orientation during injection molding—Imerys minerals:

  • Increase part stiffness 
  • Provide an excellent stiffness/impact balance 
  • Improve heat deflection temperature—essential for automotive under-the-hood parts or for microwave resistant thermoformed plastics for example 
  • Ensure good dimensional stability by reducing shrinkage, warpage and anisotropy 
  • Give a very low coefficient of thermal expansion (CLTE)—ideal for automotive zero-gap designs, for example 


Imerys minerals are ideal for improving the mechanical properties of plastics for:

  • Automotive parts
  • White goods
  • Domestic appliances
  • Garden furniture
  • E&E housings
  • Wood plastic composites
  • Recycled plastic goods


Imerys minerals are widely used in all thermoplastics, including polyolefins (PP, polyethylene), TPOs, polyamides, PC/PBT blends, PC/ABS blends, PPE blends, polyester blends, PVC and biopolymers

They make excellent glass fiber extenders and alternatives in recycled polyamides.



Recommended grades

Calcined kaolin

We recommend our Polarite amino-silane treated calcined kaolin and hydrous kaolin range for superior impact strength and modulus in polyamides.


We recommend our Nyglos® wollastonite grades for improving HDT, stiffness and surface appearance in ETP.


We recommend our Suzorite® micas for plastics applications requiring improved mechanical properties and sound damping.

We offer a full range of custom formulation and technical and process support services to help you match the right mineral grade to your application requirement.

Please contact us, we will be only too happy to help

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