BS ISO 22766:2020 pdf free.Plastics一Determination of the degree of disintegration of plastic materials in marine habitats under real field conditions.
BS ISO 22766 This document specifies test methods for the determination of the degree of disintegration of plastic materials exposed to marine habitats under real field conditions.
The marine areas under investigation are the sandy sublittoral and the sandy eulittoral zone where plastic materials can either be placed intentionally (e.g. biodegradable fishing nets) or end up as litter due to irresponsible human behaviour. This depends on their physical characteristics, form and size of the materials, and on water currents and tidal movements. This document specifies the general requirements of the apparatus, and the procedures for using the test methods described.The determination of the level of disintegration of plastic materials exposed to pelagic zones such as the sea surface or the water column above the seafloor are not within the scope of this document.This document is not suitable for the assessment of disintegration caused by heat or light exposure. The described field test is a disintegration test and not a biodegradation test. Therefore, it cannot be used for demonstrating biodegradation or for making unqualified claims such as “biodegradable in marine environment” and similar.The test material, preferably in the form of a film, is fixed in non-degradable plastic frames and both
sides of the material are protected by a plastic mesh with limited defined mesh size (2 mm) in order to avoid sample loss once the disintegration process has started. Several frames with fixed test specimens are exposed to the eulittoral zone where the material is subjected to the tides and severely fluctuating weather conditions, and to the seawater – sediment interface in the sublittoral zone where less rough environmental conditions are likely to be expected.BS ISO 22766 pdf download.