Welcome to Imerys Performance Minerals

Lightweighting and wall reduction

Lightweighting & wall reduction Imerys minerals for tougher, lighter plastics

With the ever-increasing focus on environmental issues, automotive and packaging producers are striving to produce effective products using lightweight materials. Imerys talcs are excellent solutions for achieving lightweighting and dowgauging in automotive parts, packaging and foamed plastics. Our calcium carbonates are minerals of choice for density reduction in BOPP film.

Talc for polypropylene (PP) automotive parts and packaging

Used are reinforcing agents in polypropylene (PP) Imerys talcs reinforce the polymeric matrix making them a perfect green solution for reducing plastic part weight.

In rigid plastics for automotive or packaging applications, Imerys talcs:

  • Increase stiffness and dimensional stability
  • Improve impact resistance compared to other reinforcing additives
  • Lower the carbon footprint of the end product
  • Lower CO2 emissions associated with heavier car parts

Automotive solutions

In automotive applications, Imerys delaminated high aspect ratio HAR® talcs are ideal for replacing more conventional jet-milled talcs in automotive bumpers or interior trim formulations.

For example, a 15% loading of HAR® talc confers similar stiffness and overall performance as 20% standard talc and enables a 5% reduction in part density.

Our Jetfine® ultrafine talcs are an excellent solution for achieving the right impact / stiffness balance in automotive parts.


In PP thermoformed packaging, our Mistropack® concentrate solution:

  • Improves rigidity
  • Reduces finished product weight
  • Lowers production costs
  • Improves production throughput

For example, in sheet plastics a 10% loading of Mistropack® allows an 8% decrease in sheet thickness.

Foamed plastics

In foamed plastics, Mistrocell® micro-lamellar talcs are excellent cell nucleation agents in PP which generate lightweight foamed plastics with a high cell density that are just as robust as unfilled plastics. 

For example, a 5% loading of Mistrocell® allows a 10% reduction in part weight at the same apparent stiffness.

Calcium carbonate for density reduction in BOPP film

Used in biaxially-oriented polypropylene (BOPP) films, calcium carbonate promotes cavitation and microvoid formation making it an excellent choice where density reduction is required.

Our Supercoat® 70S calcium carbonate grade has been designed for thin film applications, where high opacity and gloss are also required.

Supercoat® 70S has a controlled particle size and top cut that minimize the number of stress concentrators within the film and maximize its mechanical performance while still offering density reduction and the required optical and surface properties.



HAR® talcs

We offer a full range of bespoke 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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