BS 4790：1987测试标准详解

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BS 4790：1987

, y. N( x7 U3 P. r7 ~- bDetermination of the effects of a small source of ignition on textile floor coverings
（hot metal nut method）
小火源对纺织物地板覆盖物作用效果（热金属核法）

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Scope: It is applicable to all types of textile floor coverings whether loose-laid or fully adhered and used with or without an underlay
适用范围：适用于所有类型的纺织品地板覆盖物。

1 y: }* p, |" N' @& o! C' eMethod of mounting test specimens: loose-laid ,fully adhered, loose-laid with an underlay
样品安装方法：松铺型，完全粘附型，松铺带衬垫型

Test specimen: At least 3 test specimens each measuring 300mm*300mm
测试样品：至少3个试样300mm*300mm
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Item 0 r/ Z) z, i: I" Z7 M8 T8 @	Standard % n. v5 D  h& U2 _8 g- J	Requirement : {" q& q; y  L; ^- U9 N+ |2 t
Flame 5 }. I' M/ W$ S	BS5287 1 o% r6 }+ Z1 w) R$ V, ^	ⅰ）If the floor covering has a low radius(up to 35mm) of effects of ignition ) k! z3 [& J/ `4 C" r' ` $ D" k+ w! G5 H9 y+ K, | Pass 0 T) f6 K4 h! J如果地板覆盖物表面燃烧半径少于35mm  通过 ⅱ）If the floor covering has a medium radius(over 35 up to 75) of effects of ignition Pass 如果地板覆盖物表面燃烧半径大于35mm少于75mm  通过 ⅲ）If the floor covering has a high radius(over 75mm)of effects of ignition " [* s  ]2 l4 T* \; k Failure - p: _* @- p7 ~' l/ y- _如果地板覆盖物表面燃烧半径大于75mm  失败

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Conditioning: At least 24Hours in Humidity of 65+-2%and a temperature of 20degree
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