Inorganic composite core material mixed with glass fiber wool and glass powder and preparation method

Abstract

The invention discloses an inorganic composite core material mixed by glass fiber cotton and glass powder and a preparation method of the inorganic composite core material. The core material is formed by stacking thin core materials layer by layer, wherein the thin core materials are obtained by mixing the glass fiber cotton and the glass powder. The core material is easy to machine, punch, chamfer or flatten. The glass fiber cotton can be flame cotton, centrifugal cotton or combination of the flame cotton and the centrifugal cotton, and the average grain diameter of the glass powder is 0.5-6.0 microns. According to the inorganic composite core material, because the glass powder is added, the core material can improve the expansion phenomenon in the using process of vacuum insulated panels, and the expansion rate of the constructional vacuum insulated panels after being installed on the wall is reduced.

Description

technical field [0001] The invention relates to an inorganic composite core material and a preparation method thereof, in particular to an inorganic composite core material mixed with glass fiber cotton and glass powder and a preparation method thereof. Background technique [0002] Vacuum insulation panels are based on the principle of vacuum insulation. By maximizing the vacuum inside the panels and filling them with porous low thermal conductivity materials to achieve efficient thermal insulation, it has become the material with the lowest thermal conductivity. [0003] The core material itself should be a porous material with low thermal conductivity, which is used to limit the movement space of some gas molecules remaining in the vacuum insulation panel, thereby preventing gas heat convection and heat conduction, which is the core structure of the vacuum insulation panel. At the same time, the core material should also play a supporting role to prevent the external pack...

AI Technical Summary

Problems solved by technology

Therefore, the tear strength of the fiberglass core is limited

In addition, the rebound rate of the material mat or core material made of glass fiber is too large. Once the high-efficiency barrier film is pierced, the insulation fiber material in the vacuum insulation panel will be hollowed out, which seriously affects the performance of the vacuum insulation panel. Performance

In addition, the price of glass fiber materials is generally high, which limits its wide application.

[0005] In addition, adding powder and zeolite to glass wool can improve the overall performance of the core material, but zeolite has a high density and is too heavy, which will make the core material too heavy and affect the scope of use of vacuum insulation panels; calcium carbonate powder If the particle size is too large, it will affect the intertwining and bonding of glass wool

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