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HAR® talcs High aspect ratio talcs for stiffer and lighter parts

  • Superior flexural modulus enabling downgaging
  • Excellent dimensional stability
  • Good stiffness / impact balance

Imerys high aspect ratio HAR® talcs provide superior flexural modulus combined with excellent dimensional stability and good stiffness/impact balance in polypropylene and engineering thermoplastics for the automotive, E&E, appliance and packaging industries.

HAR® talcs enhance stiffness

High aspect ratio HAR® talcs talcs are produced using a patented delaminating process which results in significantly higher aspect ratios than conventionally micronized talcs.

Proper processing and dispersion of HAR® talc in plastic compounds generates excellent orientation of particles during injection molding, which maximizes stiffness, HDT and dimensional stability of the resulting part.

Micronized talc & High aspect ratio talc

Automotive applications

Using high aspect ratio HAR® talcs in automotive parts allows manufacturers to make thinner, lighter auto parts contributing to making cars lighter, improving fuel economy (CAFE) hence decreasing CO2 emissions.

HAR® talcs also provide excellent performance in automotive parts in terms of:

  • Dimensional stability, leading to lower mold shrinkage and CTE, which is ideal for zero-gap designs
  • Increased flexural modulus (about 20% higher than micronized fine talcs)
  • Improved heat distortion temperature (HDT)

HAR® talcs are particularly recommended for automotive parts such as:

  • Exterior parts: bumpers, rockers and fenders
  • High impact resistant interior parts: dashboards, door pillars and interior trim

Household appliances

In household appliances such as washing machines, high aspect ratio HAR® compounds make excellent alternatives to fiberglass-reinforced plastics, giving excellent rigidity / stiffness and improved dimensional stability at a reduced cost.

Rigid packaging

HAR® talcs are ideal for food packaging applications where barrier properties are crucial.

Flame retardancy

HAR® talcs are an excellent solution for flame retardant formulations due to the effect of their higher aspect ratio on char and barrier properties, which results in reduced rate of heat / mass transfer and better flame retardancy.

Easy handling – high throughput

HAR® talcs are supplied in micro-sphere, densified form and have excellent flow properties for easy handling and high compounding throughput.

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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