What is ISO 4589-4 about?
ISO 4589-4 is the fourth part of the multi-series standard ISO 4589. ISO 4589-4 specifies a test method for determining the minimum volume fraction of oxygen, in admixture with nitrogen, at ambient temperature, that supports combustion of the small vertical sheet test specimen under a specified gas velocity that is higher.
ISO 4589-4 specifies the testing apparatus for determining the high gas velocity oxygen index (HOI)
NOTE: The test method is applicable to materials in the form of sheets up to 2 mm thick. It is also applicable to flexible sheet materials that are supported vertically by a specified specimen holder.
Who is ISO 4589-4 for?
ISO 4589-4 on the determination of HOI is relevant to:
- Plastic manufacturing industry
- Chemical engineers
- Product engineers
Why should you use ISO 4589-4?
Burning behaviour of materials used in plastics is a critical factor that determine the quality and performance of end-products, ensuring it’s a long service-life. ISO 4589-4 has been prepared to extend the test methods available for the determination of flammability by oxygen index to the higher gas velocity of oxygen/nitrogen mixture to which plastic materials can be exposed in a service situation where the gas velocity is higher.
ISO 4589-4 specifies the testing apparatus for determining the HOI.
Assessing the burning behaviour of materials through the determination of HOI in compliance with ISO 4589-4, can help you evaluate the ignitability of plastics, thereby assisting in making improved choices for the components used in end-products, as per their application.