Experimental Study on Flame Retardancy of Flexible Polyurethane Foam Products

被引：0
|
作者：
Liu Y. [1 ,2 ]
Yang R. [1 ,2 ]
Feng W. [2 ,3 ]
Wang K. [2 ,3 ]
Ou L. [2 ,3 ]
Chen Z. [2 ,3 ]
Chen Y. [2 ,3 ]
机构：
[1] National Engineering Technology Flame Retardant Materials, Beijing Institute of Technology, Beijing
[2] National Center for Quality Supervision and Testing of Flame Retardant Materials, Beijing
[3] BIT Flame Retardant Science and Technology Ltd., Beijing
来源：
Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 03期
关键词：
combustion grade; flexible PU foam; limit oxygen index; vertical burning test;
D O I：
10.11896/cldb.22060066
中图分类号：
学科分类号：
摘要：
The combustion characteristics, cell structure of flexible polyurethane (PU)foam were tested by limit oxygen index tester, vertical burning tester and SEM, and fire grade classified by 7.1.4 and 8.1.4 of GB 50826 Technical code for construction of electromagnetic wave anechoic enclosure. The relationship between different combustion characteristics of PU was studied. The applicability of the burning test method was discussed. The results show that the lower limit oxygen index(LOI), the more difficult the PU foam is to extinguish after being ignited in the air, and the less mass remains. The PU foam with high density and high LOI was tested by vertical burning, the specimen was extinguished after the burner was removed. There is no significant correlation between oxygen index and vertical combustion height (flame height). The judgement results of flexible PU foam according to requirement in absorbing material show that unqualified flame height of vertical combustion is the main reason for the unqualified flame retardant performance. Due to the open-cell structure of flexible PU foam and the characteristics of vertical burning test method, the evaluation method of vertical burning performance of flexible PU foam using GB/T 8333-2012 is debatable. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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