First, the performance characteristics of insulation board
1, which has very good fire resistance, belongs to A 1 grade flame retardant material, has good fire resistance, and the fire resistance limit reaches above 1000℃, which fully meets the requirements of the fire isolation belt and the document [2009] No.46 of the Ministry of Public Security and the Ministry of Housing and Urban-Rural Development.
2. The heat preservation performance is also very high. Because its closed porosity is 95%, high closed porosity reduces convective heat transfer, which is a prerequisite for high thermal insulation. The thermal conductivity of HT foam concrete fireproof exterior wall insulation board is basically the same as that of polystyrene board, which can meet the requirements of building insulation.
3. The strength is good and it is not easy to break. The compressive strength, flexural strength and strength index of this product are all high, reaching the relative unity of low density and high strength, and it is not easy to be broken during use and transportation, which conforms to the fire integrity.
The biggest advantage is light weight. When the density is 100-300kg/m3, it can completely meet the requirements of fire isolation belt. At the same time, the cost can be greatly reduced.
5. It is a kind of green raw material, which is nontoxic and harmless. The raw materials of multi-element inorganic foam fireproof isolation belt for external wall insulation will not burn at high temperature and will not release toxic gases, so it is a safe and environmentally friendly building material.
Second, the selection skills of insulation board
1. Be sure to look at the weight and strength when purchasing. This board is fragile. If the weight is light, it means that the density is not up to standard and the compression ratio is not enough. This packing density is low. If the bulk density is less than 220, it can't reach A 1 fire protection, but it can be used as a low-grade fire protection board. If you feel that the density is high and the weight is moderate, it means that the bonding strength is too low, indicating that the quality of the cementing agent is not good, and the board can only pass through the comprehensive action of bulk density/thickness/compression ratio/binder. Selection skills of foam cement insulation board
2. When buying, look at the type of adhesive. Generally speaking, the vast majority of binders used are sodium silicate or magnesium oxide brine. Cement foam board made of sodium silicate as binder will disperse after soaking in normal temperature water for 30 minutes. It is best to choose sodium silicate with high friction number, and the special waterproof agent has good water resistance, and it will be good to soak for one day. Cement foam board with magnesium oxide brine as binder, if the selected magnesium oxide has good activity, high price and qualified technology, it will not break so easily and has good water resistance. It will not foam for 30 minutes, and even if it continues to foam, there will be problems and anti-halogen phenomenon.
3. You can smell the material board when purchasing. If the smell of cement foam board is pungent, it means that urea-formaldehyde glue protein such as bone glue or cheap 108 glue is added to the binder to increase the strength, which will not meet the requirements of environmental protection.
The above are the performance characteristics and purchasing skills of insulation board introduced by Bian Xiao. If you want to know about insulation board, you can refer to Bian Xiao's introduction, hoping to help you.