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挤塑板的结构对阻燃的作用有哪些?
作者:admin 来源:本站 发布时间:2016-02-27 10:24:25 浏览次数:291
挤塑板是CO2发泡的由于CO2是不支持燃烧的气体,也具有类似的效果。还有被分解的阻燃剂释放的HBr也会作为一种气体附着在闭孔内。但是这种闭孔封气效应并不是一种永恒的效应,随着时间的增长和环境的变化,闭孔中迟早会被空气占领,所以,人们有时会发现阻燃挤塑板很短的时间内会在自然的环境下降低或丧失阻燃性大多与此有关。
Extruded plate is CO2 foam because CO2 does not support combustion gas, also has a similar effect. There are HBr flame retardant is decomposition of the release will be a gas attached to the obturator. But this obturator sealing effect and is not a permanent effect, with the growth of the time and the environment changes, the obturator sooner or later occupied by air, so people sometimes find it can in the natural environment reduction or loss of flame retardant high and more relevant flame retardant extruded board, a very short period of time.
挤塑板是一种细密的充满泡孔的发泡体塑料,这些密闭的泡孔里面势必会裹覆一些气体,这些气体的成分对阻燃性多少也有些影响,阻燃剂被添加到挤塑板原料中经过熔融塑化基本在XPS中密布分散,挤塑板被引燃时需要有氧气的参与才能发生燃烧,这些闭孔中的气体如果是空气则属于常态下燃烧,这时是阻燃剂真实的阻燃效果,如果闭孔中封闭的是氟氯昂等阻燃性气体则为阻燃气体太下燃烧,由于有机物周围不能完全接触到助燃的氧气,可能有效的帮助阻燃剂阻燃,因为这种燃烧本身并不十分剧烈,阻燃剂的负担被减轻。
Extrusion plate is a fine full of foam plastic bubble, the bubble will be closed the wrapped gas inside the hole, the gas composition of flame retardant is also somewhat affected, the flame retardant is added to the raw material after melting extrusion plate basic in XPS clouds scattered, extruded plate is ignited when oxygen is required to be able to participate in the occurrence of burning gas in the air if the obturator is under normal combustion, the flame retardant effect of flame retardant is true, if closed closed is the CFC as flame retardant gas for flame retardant gas too burning, because the organic matter can not be completely exposed to the combustion around oxygen may help flame retardant, because the combustion itself is not very intense, the flame retardant burden was reduced.
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