ChinaAutoRegs｜GB/T 2406.2-2009 英文版/English/翻译/塑料 用氧指数法测定燃烧行为 第2部分：室温试验
Plastics – Determination of Burning Behaviour by Oxygen Index – Part 2: Ambient-Temperature Test
1 SCOPE
This Part of GB/T 2406 specifies the methods for determining the minimum concentration of oxygen, in admixture with nitrogen, which is required to exactly support the combustion of a test specimen under specified test conditions. The results are defined as oxygen index values.
Methods are provided for testing materials that are self-supporting in the form of vertical bars or sheet up to 10.5 mm thick. These methods are suitable for solid, laminated or cellular materials characterized by an apparent density greater than 100 kg/m3. The methods may also be applicable to some cellular materials having an apparent density of less than 100 kg/m3. Additionally, a method is provided for testing sheet or film materials that can be supported vertically.
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Note 1: It may not be possible to apply these methods satisfactorily to materials that exhibit high levels of shrinkage when heated, e.g. highly oriented thin film.
Note 2: For assessing the flame propagation properties of cellular materials of density < 100 kg/m3, attention is drawn to the method of GB/T 8332.
2 NORMATIVE REFERENCES
The following Standards contain provisions which, through reference in this part of GB/T 2406, constitute provisions of this Part. For dated references, subsequent amendments (corrigenda excluded) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Part are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. For undated references, the latest edition of the normative documents referred to applies.
GB/T 5471-2008 Plastics – Compression moulding of test specimens of thermosetting materials (ISO 295: 2004, IDT)
GB/T 9352-2008 Plastic – Compression moulding of test specimens of thermoplastic materials (ISO 293: 2004, IDT)
GB/T 2828.1-2003 Sampling procedures for inspection by attributea-Part1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (ISO 2859-1:1989, IDT)
GB/T 11997-2008 Plastic – Multipurpose test specimens (ISO 3167:2002, IDT)
GB/T 17037.1-1997 Injection moulding of test specimens of thermoplastic materials – Part 1: General principles and moulding of multipurpose and bar test specimens (idt ISO 294-1:1996)
GB/T 17037.3-2003 Plastics – Injection moulding of test specimens of thermoplastic materials – Part 3: Small plates (ISO 294-3: 2002, IDT)
GB/T 17037.4-2003 Plastic-Injection moulding of test specimens of thermoplastic materials-Part 4: Determination of moulding shrinkage (ISO 294-4: 2001, IDT)
ISO 294-2:1996 Plastics – Injection moulding of test specimens of thermoplastic materials – Part 2: Small tensile bars
ISO 294-5:2001 Plastics – Injection moulding of test specimens of thermoplastic materials – Part 5: Preparation of standard specimens for investigating anisotropy
ISO 2818: 1994 Plastics – Preparation of test specimens by machining
ISO 2859-2: 1985 Sampling procedures for inspection by attributes – Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection
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