BS ISO 4658:2020

This standard BS ISO 4658:2020 Acrylonitrile-butadiene rubber (NBR). Evaluation procedure is classified in these ICS categories:

• 83.060 Rubber

This document specifies, for acrylonitrile-butadiene rubbers (NBRs):

1. physical and chemical tests on raw rubbers;

2. standard materials, a standard test formulation, equipment and processing methods for evaluating the vulcanization characteristics.

The mixing preferred method is the single stage mixing with LIM (laboratory internal mixer).