Many people choose thermal insulation materials as external thermal insulation main materials based on the thermal conductivity or water absorption rate as the evaluation basis, and in fact the thermal conductivity is an indicator of the thermal insulation performance of thermal insulation materials, and is also an important reference for selecting thermal insulation materials. item, However, the indicator for measuring the quality of thermal insulation materials is not only determined by the thermal conductivity factor, but must refer to the following indicators for comprehensive judgment:
1, water absorption rate: building insulation is for the building wearing a cotton-padded jacket, this cotton-padded jacket in addition to insulation, but also can not absorb water.
Permeability: Permeability This technical indicator refers to the diffusion resistance of water vapor. If the outer wall insulation system has poor air permeability and the water gas diffusion is blocked, the first is to prevent the wall from being wet and affect the color of the finish paint; The second is to produce stress, so that the coating drum bubble, fall off; The third is the gradual increase in the moisture content of the wall body, resulting in the enrichment of condensed water, which has a negative impact on the performance of the wall thermal engineering and structure. Fourth, even if the external insulation system of the outer wall is energy-saving, it has caused indoor air to become turbid. Not suitable for human settlements.
3, bond strength: reflects the determination of the bond strength of Wall insulation materials, in order to reduce and avoid the wall insulation system air drum-cracking and shedding phenomenon to ensure the use of safety and durability.
4, tensile strength: thermal insulation plate to meet a certain tensile strength or tear strength.
5, compressive strength
6, fire performance: fire performance will have the corresponding material fire performance level,
7, environmental protection
8, useful life
The choice of thermal insulation materials can be said to be a hard work, hope that friends can carefully consider screening, must not blindly choose. For more information, please refer to our official website, www.linso.cn.
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