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Mistron HAR

Mistron HAR® High aspect ratio talc for 40% lower air permeability in tire inner liners

Developed using a unique, patented, delamination process which dramatically increases aspect ratio, Mistron HAR® is five times more lamellar than standard talc.

Mistron HAR® is five times more lamellar than standard talc

Mistron® talc
SEM photo Mistron HAR
Mistron HAR® talc

Used as a reinforcement filler in partial replacement of carbon black in tire inner liners, Mistron HAR®'s platy properties restrict liquid and gas diffusion increasing the diffusion path and improving impermeability. When impermeability is good, tires perform better in terms of rolling resistance, handling, cornering and wear.

Mistron HAR® forms an effective barrier against gas diffusion

Image Barrier property diffusion path

Mistron HAR® is ideal for energy efficient LRR tires

Mistron HAR®-reinforced tire inner liners give 40% lower air permeability rates than liners filled with carbon black. This improvement allows tire manufacturers to reduce liner thickness and tire weight, making tires cheaper to produce and lowering rolling resistance (LRR).

Lower rolling resistance (LRR) means fuel savings for the consumer and lower C02 emissions, and can contribute to boosting LRR tires to a higher rating under tire efficiency labeling systems, for example.

Mistron HAR® also:

  • Limits oxygen diffusion in the tire carcass, preventing steel cord oxidation and improving durability.
  • Improves scorch time, viscosity and cut growth resistance.

40% lower air permeability rates than carbon black

Graph Mistron HAR vs Carbon black

Mistron HAR® is a available in high-density, dust-free micro-beads for easy handling and high processing throughput.

Mistron HAR® Talc for tyre inner liners

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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