Extrusion plate fire B1, B2 grade materials, how to distinguish?
Extruded sheet is extruded polystyrene insulation board, it is made from polystyrene resin as raw material and other raw materials and polymer content, through a special process heating mixed with catalyst, rigid foam board and continuous extrusion, extrusion molding and manufacturing. Its scientific name is insulatedwith extruded polystyrene foam (XPS), XPS have a closed cell cellular structure perfect, this structure allows XPS plate has a rather low water absorption (almost no water), moisture-proof, breathable, lightweight, corrosion resistance, low thermal conductivity, high compressive strength, ageing resistance (normal use almost no aging phenomenon, decomposition) use of energy saving and long service life, thermal conductivity the excellent properties of low thermal insulation material.
Refractory grade plastic extruded board in more detail, B3, B2, B1 three grades (Grade A now science and technology can not reach), including grade B3 ordinary plate, namely a little on fire, and the fire is more and more big; B2 class for slow combustion stage, namely the point after the fire does not change, and the drop will not ignite paper; B1 away from fire suffocation, automatically extinguished after leaving the fire is extinguished, or 10 seconds.
Tight closed cell structure due to continuous extrusion. Its density, water absorption, thermal conductivity and steam permeability are lower than other types of sheet materials, is currently recognized as the best insulation material market.
Extruded plate fire B1, between B2 materials: B2 class for slow combustion stage, namely the point after the fire does not change, and the drop will not ignite paper; B1 away from fire suffocation, automatically extinguished after leaving the fire is extinguished, or 10 seconds.
