Metso Insights Blog Mining and metals blog Reduce the risk of fire with fire-retardant rubber media
Jun 22, 2022

Reduce the risk of fire with fire-retardant rubber media

Björn Lovén
Björn Lovén
Product Engineer, CNSSCR Technology
Fire is a major safety hazard for all site. It is dangerous for humans and the environment and devastating for plant availability. A challenge is that most sites hold many flammable materials. It is therefore important to develop products and methods that reduce the fuel for fire and minimize the risk of fire.

Metso Outotec offers fire-retardant rubber as part of our screening media and wear protection range. In addition, we develop new rubber compounds with the aim of reaching equivalent material properties as our most common rubber compounds.

Follow an accredited standard for reliable results

Transparency and clear product descriptions are crucial, so that you know exactly what to expect from a product. We have therefore chosen to test the fire-retardant property against one of the rubber industry's most well-known fire-retardant standards - UL94 - the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliance testing.

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The UL94 standard is a global standard that can be tested in almost any accredited laboratory word wide. The ability to easily perform trials and compare different rubber compounds creates reliable results.

Metso Outotec’s fire-retardant materials T40B and T60B currently meet the UL94 class HB. UL94HB is the first classification level in that standard. Our first development step is to make sure we have a material that meets the HB standard level and reduced burn rate than the standard rubber compounds. 

We are constantly working to develop materials that meet the higher and more demanding requirements without losing wear resistance. The aim is to develop self-extinguishing materials, which would be the major differentiator compared to the standard level properties.