Welcome to Imerys Performance Minerals


Mistroblock® For superior antiblocking in PE films

  • Superior film clarity and haze
  • Excellent antiblocking and coefficient of friction (COF)
  • Optimum mechanical and impact strength
  • Good cost / performance balance
  • Low abrasion mineral

Mistroblock® talc is based on a unique microlamellar talc ore which provides improved overall film properties compared to minerals traditionally used for PE film antiblocking.

Microlamellar Mistroblock® talc is composed of conglomerates of block-like shaped particles with a high specific surface area:

Block-like shaped particles with a high specific surface area

Conventional lamellar talc
SEM photograph Mistroblock
Micro-lamellar Mistroblock®

This micro-lamellar morphology:

  • Provides optimized clarity and haze
  • Lowers blocking force and COF
  • Improves dart drop strength and puncture resistance

Mistroblock® is:

  • Suitable for use in one-pack powder blending as well as masterbatch production
  • Approved for food contact without limitation
  • The least abrasive mineral on production equipment
  • Suitable for biopolymer film production


Mistroblock® is available in compacted form for easy handling, less dust and improved productivity.

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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