Analysis of characteristics of sheet insulation materials

[Zhonghua Sheet Mesh] In a broad sense, plate insulation materials are widely used in areas and areas, and can be used in exterior insulation projects or in exterior insulation projects. Thermal insulation body sheet material may be foamed polystyrene sheet, a different material is extruded polystyrene boards, rock wool boards, glass wool boards, wood wool VIVA fender water, the FOREX US rock cement board, etc. . The board insulation material can be divided into a single insulation material and a system insulation material. The following problems should be noted in the application process:

( 1 ) A single thermal insulation material is the main application of thermal insulation engineering, and other materials need to be used in the process of use. Such as: foamed polystyrene board, extruded polystyrene board, rock wool board, glass wool board, etc., test the following test contents before use:

1 , Thermal conductivity (W/m?K) : This technical indicator is a key indicator of the thermal insulation effect of the project. In general, the laboratory test is carried out when the plate is dried to constant weight, and the application of the material is in the air. It is used under certain humidity conditions. Therefore, it should be multiplied by a certain factor when using it ; or, the material can be directly adjusted to the environment under test conditions.

2 , Apparent density (Kg/m3) : The apparent density of a material affects its thermal conductivity to a certain extent. Materials with an unacceptable apparent density will directly cause a decrease in physical properties such as strength and dimensional stability.

3 , Compressive strength (MPa) : refers to the compressive stress of the test piece under 10% deformation. It is related to the durability and impact resistance of the finish system.

4 , Dimensional change rate (mm) : A material with a large dimensional change rate will cause cracking of the surface layer of the system.

5 , Water vapor permeability coefficient [ng / (Pa?m?s)]: This property determines the performance of water vapor transmission, which determines the condensation of the wall to some extent.

6 , Oxygen index: need to be flame retardant, otherwise the fire can not meet the standard.

 

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