At ground level, ozone is a pollutant. Ozone increases the acidity of carbon black surfaces and causes reactions to take place within the molecular structure of the rubber. This results in surface cracking and a decrease in tensile strength. The same consequences apply to exposure to ultraviolet light and are referred to as ‘UV degradation’. Mandatory ozone resistance testing to EN/ISO 1431 international standards has long been an important part of our routine quality testing processes. Thanks to the special additives used in our rubber compounds, all Dunlop belts are resistant to the effects of ozone and UV.
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