Novel compound rock wool and aerogel insulation board and preparation method thereof and compound board

Abstract

The invention provides a novel compound rock wool and aerogel insulation board and a preparation method thereof. According to the method, aerosil is added directly in a process of preparing a rock wool board, specifically, the aerosil is evenly sprayed among fluffy rock wool filaments, the fluffy rock wool filaments containing the aerosil are constantly compressed and tightened up in a longitudinal flowing process, after compression and tightening-up are conducted, rock wool bands are formed, and the multiple rock wool bands are tiled and compressed to form the novel compound rock wool and aerogel insulation board. Therefore, the aerosil can directly parasitize the rock wool board. Meanwhile, the invention further provides a compound board containing the compound rock wool and aerogel insulation board; the compound board comprises a compound rock wool and aerogel insulation board main body A and mortar layers B, and the compound board is characterized in that the mortar layers B are located on the two sides of the vertical section of the compound rock wool and aerogel insulation board main body A.

Description

Technical field [0001] The invention relates to the technical field of thermal insulation materials for buildings, and more specifically, to a novel composite rock wool aerogel thermal insulation board, a composite board and a preparation method thereof. Background technique [0002] At present, the commonly used wall insulation materials are mainly divided into inorganic and organic categories. Organic materials are light in weight, good in heat preservation and heat insulation, but their biggest drawbacks are poor fire safety performance, easy to burn, and large smoke and toxicity during combustion. , The use safety is not as good as inorganic materials. Inorganic materials have good fire resistance and are not toxic, but their thermal insulation effect is worse than that of organic materials. [0003] As a kind of inorganic thermal insulation material, rock wool board has excellent physical and dimensional stability, and has affinity with cement mortar, so it is widely used as ...

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used wall insulation materials are mainly divided into two types: inorganic and organic. Organic materials are light in weight, good in heat preservation and heat insulation, but their biggest defects are poor fire safety performance, easy to burn, and large smoke and toxicity when burning. , The safety of use is not as good as that of inorganic materials

Inorganic materials have good fire resistance and are non-toxic, but their thermal insulation effect is worse than that of organic materials

[0003] As a kind of inorganic thermal insulation material, rock wool board is widely used as thermal insulation material for building exterior walls because of its excellent physical and dimensional stability and affinity with cement mortar. Although rock wool board can play a certain role However, the existing rock wool boards used for external wall insulation have high thermal conductivity, generally 0.040-0.048W / (m K), and the thermal insulation effect is not ideal, so it is difficult to meet the requirements of building energy saving. 75% standard requirement

[0004] Silica airgel is a nanoporous amorphous solid material with excellent thermal insulation performance, its porosity is as high as 80-99.8%, the typical size of the pores is 1-100nm, and the specific surface area is 200-1000m 2 / g, the density is as low as 3kg / m 3 , the thermal conductivity coefficient at room temperature is 0.02W / (m·K), which has excellent thermal insulation performance and flame retardancy. It is a new type of energy-saving and environmentally friendly thermal insulation material. However, because its material is relatively soft and has no certain strength, it cannot be used for wall construction.

Although this method can add airgel to the rock wool board and improve the thermal insulation performance of the rock wool board, the preparation process is cumbersome and the energy consumption is high. The content in the cotton board is not easy to control, and the distribution uniformity of the modified silica airgel in the rock wool board cannot be guaranteed.

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