ISO 9772:2012 pdf download.Cellular plastics一Determination of horizontal burning characteristics of small specimens subjected to a small flame.
ISO 9772 specifies a small-scale laboratory screening procedure for comparing the relative burning characteristics of horizontally oriented, small cellular plastic specimens having a density less than 250 kg•m3 determined in accordance with ISO 845, when exposed to a small-flame ignition source.
NOTE Another International Standard exists covering flexible cellular plastic and cellular rubber: ISO 3582.
1.2 This method of test is intended for quality assurance and limited product evaluation of cellular plastic materials under controlled laboratory conditions, and is not intended to assess the fire behaviour of e.g. building materials or furnishings under actual fire conditions.
1.3 The optional classification system described in Annex A is intended for the pre-selection of cellular plastic materials for products, including the determination of the ranges of material parameters that give the same classification (see 6.1).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 845, Cellular plastics and rubbers — Determination of apparent density
ISO 1923, Cellular plastics and rubbers — Determination of linear dimensions
ISO 10093, Plastics — Fire tests — Standard ignition sources
ISO 13943, Fire safety — Vocabulary
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 13943 and the following apply.
3.1
afterfiame time
length of time for which a material continues to flame, under specified test conditions, after the ignition source has been removed
3.2
afterglow time
length of time for which a material continues to glow, under specified test conditions, after the ignition source has been removed and/or extinguishment of flame
3.3
extended application of test results
process of predicting a test result, on the basis of one or more existing test results obtained by the same test, for a product for which a property and/or the intended end-use application(s) are subject to variation
4 Significance of test
4.1 Tests conducted on a material under the conditions specified can be of considerable value when comparing the horizontal burning characteristics of different materials, controlling manufacturing processes or assessing any changes in formulation or treatment prior to use.
4.2 Assessment of fire hazard requires consideration of factors such as fuel contribution, intensity of burning (rate of heat release) and products of combustion, as well as environmental factors such as intensity of source, orientation of exposed material and ventilation conditions.
4.3 Horizontal burning characteristics, as measured by this test procedure, might be affected by factors such as density, any anisotropy of the cellular material, its melting characteristics, its colour and its thickness.
4.4 Certain materials might shrink from the applied flame without igniting. In this event, the test results are not valid, and additional test specimens will be required to obtain 10 valid test results. If this proves impossible due to non-ignition of all the specimens, then this test is not suitable for these materials.
4.5 The horizontal burning characteristics of some cellular plastic materials might change with time, and tests are therefore conducted before and after heat ageing.ISO 9772 pdf download.