NF EN ISO 846

NF EN ISO 846

April 2019
Standard Current

Plastics - Evaluation of the action of microorganisms

This document specifies methods for determining the deterioration of plastics due to the action of fungi and bacteria and soil microorganisms. The aim is not to determine the biodegradability of plastics or the deterioration of natural fibre composites. The type and extent of deterioration can be determined by a) visual examination and/or b) changes in mass and/or c) changes in other physical properties. The tests are applicable to all plastics that have an even surface and that can thus be easily cleaned. The exceptions are porous materials, such as plastic foams. This document uses the same test fungi as IEC 60068-2-10. The IEC method, which uses so-called "assembled specimens", calls for inoculation of the specimens with a spore suspension, incubation of the inoculated specimens and assessment of the fungal growth as well as any physical attack on the specimens. The volume of testing and the test strains used depend on the application envisaged for the plastic.

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Main informations

Collections

National standards and national normative documents

Publication date

April 2019

Number of pages

38 p.

Reference

NF EN ISO 846

ICS Codes

07.100.99   Other standards related to microbiology
83.080.01   Plastics in general

Classification index

T51-022

Print number

1

International kinship

ISO 846:2019

European kinship

EN ISO 846:2019
Sumary
Plastics - Evaluation of the action of microorganisms

This document specifies methods for determining the deterioration of plastics due to the action of fungi and bacteria and soil microorganisms. The aim is not to determine the biodegradability of plastics or the deterioration of natural fibre composites.

The type and extent of deterioration can be determined by

a) visual examination and/or

b) changes in mass and/or

c) changes in other physical properties.

The tests are applicable to all plastics that have an even surface and that can thus be easily cleaned. The exceptions are porous materials, such as plastic foams.

This document uses the same test fungi as IEC 60068-2-10. The IEC method, which uses so-called "assembled specimens", calls for inoculation of the specimens with a spore suspension, incubation of the inoculated specimens and assessment of the fungal growth as well as any physical attack on the specimens.

The volume of testing and the test strains used depend on the application envisaged for the plastic.

Replaced standards (1)
NF EN ISO 846
August 1997
Standard Cancelled
Plastics. Evaluation of the action of microorganisms.

Table of contents
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  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Appareillage et matériaux
  • 6 Éprouvettes
  • 7 Préparation des éprouvettes
  • 8 Modes opératoires
  • 9 Évaluation
  • 10 Expression des résultats
  • 11 Exactitude des mesurages
  • 12 Rapport d'essai
  • Annexe A Détermination de la teneur en eau et de la capacité de rétention d'eau d'un sol
  • Annexe B Témoin négatif pour l'essai A
  • Annexe C Quadrillage pour l'évaluation de la croissance fongique en surface (essai A)
  • Annexe D Informations relatives aux champignons pour essai
  • Bibliographie
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