This standard specifies determination of flammability of rigid cellular plastic with vertical burning method.
This standard is applicable to the assessment of vertical flammability of rigid cellular plastic under laboratory conditions.
This standard is not applicable to materials subject to melt-dropping and sintering during burning.
This standard does not serve as a basis for evaluating the risk of fire under actual service conditions.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, any of these publications do not apply to this standard. However parties to agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2918-1998 Plastics - Standard Atmospheres for Conditioning and Testing (idt ISO 291:1997)
GB/T 6343-1995 Cellular Plastics and Rubbers - Determination of Apparent (Bulk) Density (neq ISO 845:1988)
3 Theory
The specimen is vertically mounted in a chimney with a glass front and ignited with a bunsen burner for 10s. The height and duration of flame and the mass percent retained by the specimen are recorded.
