Composite insulation materials will become the development trend of the insulation material-Technical knowledge-Perlite-Xinyang city centertriumph insulation material Co.,Ltd.

Composite insulation materials will become the development trend of the insulation material

Time：2012-9-26 17:05:31 Source：本站原创 Hits：【字体：大中小】

Composite insulation materials will become the development trend of the insulation material
Also many of the huge market of insulation materials, insulation materials, organic and inorganic (perlite, glass beads), composite. In recent years, the product structure of the thermal insulation industry has undergone significant changes in foam class insulation material proportion is growing year by year, the annual decline in the proportion of the rigid class insulation products. Here I will introduce insulation material to what future development.

1, a lightweight material. In the same material, the smaller the density of the insulation material, the better the insulation effect. In addition, the lightweight material will not increase the additional burden of the building envelope, reducing the possibility of leakage due to excessive structural loads.

2, the hydrophobic material. Hydrophobic products resistant to environmental moisture capacity indicators, reflecting the ability of the material water permeation. It is a measure of the volume expressed as a percentage of the non-permeable portion in the sample after a predetermined flow rate and manner of spray. In addition to the small number of organic foam, most of the insulation material's porosity half closed and connectivity of this structure by itself absorbent connected pores the capillary penetration absorbent, so that the overall water absorption improve. Due to room temperature, the coefficient of thermal conductivity of water is much higher than the coefficient of thermal conductivity of the air, after absorbing water, the coefficient of thermal conductivity of the material is greatly improved, the thermal insulation effect is reduced. To avoid material absorbent to change the surface characteristics of the silicate material by the use of efficient hydrophobic agent, currently widely used is a modified silicone hydrophobic agent. In the future research and development of thermal insulation materials, the development of efficient hydrophobic properties of materials, will be a major trend.

3 green materials. In recent years, fly ash, scrap foam waste has been widely applied in the field of thermal insulation. With the development of waste degradation difficult to deal with the high cost of insulation material of this high vigorously resources are effectively used, thus greatly improving the environment. The treatment and disposal of these wastes, the state has increased support for the policy to scrap foam, there will be a greater price advantage on behalf of the insulation material. In the production process at the same time to minimize the production of energy consumption and pollutant emissions, the development of plant fiber as the main raw material, green materials, insulation materials trends.

4, ultra-efficient insulation materials. Thermal insulation material, super-efficient vacuum insulation materials and nano-porous materials two main points. Using vacuum material or reduce the thickness of the material solid part, even pore size limit at the nanoscale, we can eliminate the air convection and infrared performance, reduce the incidence of heat conduction and convection, and improve the insulation effect.

5, the development of a new type of insulation material is also a main direction of research. Currently, there have been several new types of insulation materials (such as nanopores thermal insulation materials, composite thermal insulation material asbestos substitutes, etc.). Nanopores adiabatic material: With the continuous development of nanotechnology, nanomaterials more and more people of all ages. Nanopore siliceous insulation materials nanotechnology applications in the field of thermal insulation material, most of the pore size should be within the constituent materials at the nano-scale. According to the theory of molecular motion and collision, the heat transfer of the gas is a molecule of a higher speed through the high temperature side, the molecules with a lower speed on the low temperature side. Collide transfer energy. Is smaller than this critical size because the degree of freedom of the air in the main component nitrogen and oxygen in about 70nm, a pore size of the silica fine particles in the nano-holes in the insulating material of the siliceous material internal to eliminate convection, from essentially cut off the thermal conduction of the gas molecules, thereby obtaining a lower coefficient of thermal conductivity than without convection air. The development and application of asbestos substitutes: glass wool is a man-made mineral fibers, its products, bulk density, low thermal conductivity, good thermal insulation and sound absorption performance, and corrosion-resistant, not rotten, not afraid of insects, heat antifreeze, seismic, and good chemical stability, excellent performance. Application, construction is convenient, cheap, a new type of industrial insulation materials. In recent years, the production of glass wool and its products along with the rapid development of China's socialist construction, continuously improve product quality, variety growing (wool felt sewed felt, the veneer layer sew felt tube shell and cotton board etc.), has been widely applied to petroleum, chemical, transportation, travel, manufacturing, machinery manufacturing, industrial construction.

6, inorganic insulation materials (such as perlite, glass beads, etc.) research focus should be on reducing the energy consumption in the production process, to limit the emission of dust and fibers, reducing the amount of binder. Organic insulation material (such as polystyrene foam insulation, polyurethane foam, etc.) research should focus on finding a more suitable blowing agent to replace the F11; improved flame retardant properties of the material and reduce the cost of production of the material.

Insulation materials currently in use in the application there are different degrees of defect exists corrosion of calcium oxide: calcium silicate containing moisture state, easy, and since a long period of time to retain moisture and difficult to use in a low-temperature environment; glass fiber is easy to absorb moisture, is not suitable for low-temperature environment, and also is not suitable for a temperature above 540 ℃ environment; mineral wool also exists absorbent, should not be used for low temperature environments, can only be used without the presence of moisture of the high temperature environment; polyurethane foams with polyphenylene vinyl foam should not be used in high temperature and flammable, contraction, produce toxic gases; bubble glass sensitive to thermal shock, not for drastic temperature changes, the state, so in order to overcome the lack of insulation materials, many countries have developed lightweight multifunctional composite insulation materials.

Overall, in the history of the development process of the insulation material, the only set of director of public companies, the development of multifunctional composite insulation materials, insulation efficiency and expanding the application surface.

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