Thermal insulation material

Abstract

The invention discloses a novel thermal insulation material, and the composition comprises expanded perlite, cement, gypsum powder, fibers, redispersible rubber powder, casein glue, and the like. The thermal insulation material has the advantages of high strength, aging resistance, excellent thermal insulation effect, energy conservation, environmental protection, fire protection, sound insulation, low cost, convenient use, and the like. The novel thermal insulation material can be directly applied on buildings, containers, pipelines, reactors, household appliances and the like through a plurality of construction methods, thereby achieving the effects of thermal insulation and energy conservation.

Description

technical field [0001] The invention relates to a thermal insulation material, in particular to a thermal insulation material used for building walls, pipes, containers and the like. Background technique [0002] Our country attaches great importance to building energy saving, and it is mandatory that the building energy saving rate is not less than 50%. However, relevant data show that the energy loss caused by wall heat transfer is about 1 / 3 of the total building energy consumption. Therefore, wall insulation is an important part of building energy saving. link. [0003] At present, polystyrene foam board and polyurethane foam board are used as the main insulation materials in the world. Our country is also currently using this method as the main construction technology for wall insulation. The basic structure of polystyrene foam board composite polystyrene particle external wall insulation technology: base wall, polystyrene board adhesive, polystyrene board, anti-crack ...

AI Technical Summary

Problems solved by technology

[0004] There are many problems in the use of polystyrene foam board and polyurethane foam board in place: (1) To achieve a good insulation effect, the thickness of the insulation layer must be increased. When the specific gravity of polystyrene board or polyurethane foam board is larger When the thickness is increased, the surface layer with the same load will have greater deformation due to the thicker insulation layer, which will cause more problems at the joints of polystyrene boards or polyurethane foam boards, such as windy, polystyrene boards, etc. Styrene board or polyurethane foam board will fall off in a large area, which brings great difficulty to the construction, it is difficult to ensure the quality of the project, and there are also potential safety hazards; (2) The commonly used polystyrene board bonding material is methyl fiber Plain blended cement mortar, because polystyrene board and polyurethane foam board are organic matter, the aging period is difficult to grasp. Once the aging period of the insulation material is over, the material bonded to the wall will inevitably appear hollow. In case of natural disasters, Such as strong wind, etc. will peel off the insulation layer of the outer wall, lose the insulation effect, and cause the wall to return to alkali and become damp; (3) Polystyrene foam board and polyurethane foam board have low melting points and are flammable. Once a fire occurs, the consequences will be disastrous

Calcium silicate insulation materials are prone to corrosive calcium oxide in the state of moisture; glass fiber and mineral wool are easy to absorb moisture and are not suitable for low temperature environments; foam glass is not suitable for rapid temperature due to its sensitivity to thermal shock. state of change

[0006] Expanded perlite is a kind of high-quality inorganic thermal insulation material, which has a large number of applications at home and abroad. For example, Chinese patent documents CN1172869C and CN1176868C all disclose thermal insulation materials containing expanded perlite. The components of the first thermal insulation material include seawater Paoyrite, expanded perlite, quartz, aluminum silicate fiber cotton, water glass, 1788 glue, the second insulation material consists of expanded perlite, vermiculite, floating beads, light calcium, heavy calcium, fly ash, Hemihydrate gypsum, cellulose fiber and methyl cellulose, but the problems of these expanded perlite insulation materials are: (1) In order to improve the strength of the material, a large number of inorganic materials such as water glass, fly ash and hemihydrate gypsum are used. Adhesive, which leads to a higher bulk density of the material (the dry density of the material is 280-300kg / m 3 , and the dry density of the insulation material of the present invention is at 200kg / m 3 Below), the thermal insulation effect is poor (the thermal conductivity is at 0.06-0.07W / mK, and the thermal conductivity of the thermal insulation material of the present invention is at about 0.05W / mK); (3) Expanded perlite has many micropores, and the simple use of inorganic adhesives for molding cannot completely seal these micropores, resulting in a high water absorption rate of the material, which is not resistant to freezing and thawing, and is easy to age; (4) ) Inorganic adhesives have poor bonding strength at the initial stage of solidification, hollowing will appear during construction, and problems such as shrinkage and cracking will also occur during solidification; (5) Some thermal insulation materials also contain carcinogenic and radioactive substances such as meerschaum. harmful substances

All these problems lead to insufficient overall performance of expanded perlite insulation materials, which directly affect the application of expanded perlite in insulation materials