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Barrier Properties

Barrier properties Imerys platy minerals improve the barrier properties of rubber compounds

Due to the platy shape of their particles, Imerys hyper platy kaolins reduce the gas and vapor permeability of rubber materials leading to improved barrier properties.

Hyper platy minerals have highly lamellar particles which create an impermeable barrier, reducing air and liquid permeability in the rubber compound due to an increase in the mean-free path of diffusion. 

Hyper platy minerals improve air permeability in butyl, natural, and polyisoprene rubber compounds.

Platy minerals form a more effective barrier against gas diffusion

Image Barrier property diffusion path

Generally speaking, the more lamellar the mineral, the lower the permeability. 

Imerys platy minerals are particularly suitable for improving permeability in tire inner liners, medical stoppers, membranes, and hoses

We recommend:

  • Hyper platy Hydrite® SB60 and Hydrite® SB100 kaolin for critical applications such as tire inner liners, where they provide down gauging opportunities.
  • Cost-effective Hydrite® SB100 grade can be used at a significant loading to improve permeability in tire inner liners at standard inner liner gauge.

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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