Flexible PVC plasticized with conventional plasticizers may lose plasticizer under certain conditions and become rigid and brittle. In contact with fuel, NBR reduce the extraction of the plasticizer.
Flexible PVC modified with NBR loses less weight when in contact with oils. Hence, retention of flexibility and longer service life are ensured.
The addition of NBR to PVC footwear compounds improves the abrasion resistance and enables compliance with the specifications for safety footwear.