ChinaAutoRegs|GB/T 2408-2008英文版翻译 塑料 燃烧性能的测定 水平法和垂直法
Plastics – Determination of Burning Characteristics – Horizontal and Vertical Test

最新适用版：
GB/T 2408-2021英文版翻译《塑料燃烧性能的测定水平法和垂直法》

1 SCOPE

This standard specifies the laboratory procedure for determining the burning behavior of vertically or horizontally oriented specimens made from plastic and other non-metallic materials, exposed to a flame ignition source of 50W.
These test methods determine the linear burning rate and the afterflame/afterglow times, as well as the damaged length of specimens.
This standard applies to solid and cellular materials that have an apparent density of not less than 250 kg/m3, determined in accordance with GB/T 6343. It does not apply to materials that shrink away from the applied flame without igniting; ISO 9773 should be used for thin flexible materials.
This standard specifies the classification systems (see 8.4 and 9.4), which may be used for quality assurance, or the pre-selection of component materials of products. This standard may be used for obtaining positive results at a thickness equal to the smallest thickness used in the application.
NOTE: Test results are influenced by material components, e.g. pigments, fillers and fire-retardants, and properties such as the direction of anisotropy and the molecular mass.

2 NORMATIVE REFERENCES

The following Standards contain provisions which, through reference in this text, constitute provisions of this Standard. 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 Standard 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 1844.1-2008 Plastics – Symbols and abbreviated terms – Part 1: Basic polymers and their special characteristics (ISO 1043.1-2001, IDT)
GB/T 2918-1998 Plastics–Standard atmospheres for conditioning and testing (idt ISO 291:1997)
GB/T 5169.5-1997 Fire hazard testing for electric and electronic products-Part 2: Test methods-Section 2: Needle-flame test (idt IEC 60695-2-2:1991)
GB/T 5169.17-2002 Fire hazard testing for electric and electronic products-Part 17: 500W flame test methods (idt IEC 60695-11-20:1999)
GB/T 5741-2008 Measure method for exhaust smoke of marine diesel engine (ISO 295:2004, IDT)
GB/T 6343-1995 Cellular plastics and rubbers―Determination of apparent (bulk) density (ISO 845:1988, IDT)
GB/T 6379.2-2004 Accuracy (trueness and precision) ofmeasurement methods and results – Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
GB/T 9352-2008 Plastic – Compression moulding of test specimens of thermoplastic materials (ISO 293:2004, IDT)
GB/T 12006.1-1989 Polyamides-Determination of viscosity number (neq ISO 307:1994)
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 (ISO 294-1:1996, IDT)
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 9773:1998 Plastics — Determination of burning behaviour of thin flexible vertical specimens in contact with a small-flame ignition source
ISO 10093:1998 Plastics — Fire tests — Standard ignition sources
ISO/IEC Guide 51:1990 Guidelines for the inclusion of safety aspects in standards
IEC Guide 104:1997 The preparation of safety publications and the use of basic safety publications and group safety publications
IEC 60695-11-4:2004 Fire hazard testing — Part 11-4: Test flames — 50W flame — Apparatus and confirmational test methods

3 TERMS AND DEFINITIONS

For the purposes of this document, the following terms and definitions apply.

3.1
afterflame
Persistence of flaming of a material under specified test conditions, after the ignition source has been removed.
3.2
afterflame time
t1, t2
The length of time during which an afterflame persists.
3.3
afterglow
Persistence of glowing of a material under specified test conditions, after cessation of flaming or, if no flaming occurs, after the ignition source has been removed.
3.4
afterglow time
t3
The length of time during which an afterglow persists.

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