Core material for vacuum insulation plate and vacuum insulation plate form by same

Abstract

The invention relates to a core material for a vacuum insulation plate and a vacuum insulation plate form by the same. The core material for the vacuum insulation plate comprises a middle core material body consisting of multiple layers of stacked glass fiber sheet materials (that is, chopped strand core materials) formed with a wet paper-making method, or glass fiber felt (that is, dry glass fiber cotton core materials) formed with a dry non-woven fabric technology or laminates (that is, mixed core materials) of the glass fiber sheet materials and the glass fiber felt, wherein ultra-thin glass fiber cotton sheet materials are arranged on upper and lower sides of the middle core material body; diameters of fibers in the ultra-thin glass fiber cotton sheet materials are in a range of 1-4 microns, and lengths of the fibers are in a range of 1-5 mm. The ultra-thin glass fiber cotton sheet materials are small in fiber diameter, short and softer in fiber and cannot pierce a film bag easily, so that the ultra-thin glass fiber cotton sheet materials are applicable to aluminized film and aluminum foil composite film production; the condition that large areas of the chopped strand core materials or dry glass fiber felt core materials are in contact with the film bag is avoided, and the risk that the fibers pierce the film bag is effectively avoided.

Description

technical field [0001] The present invention relates to a vacuum insulation panel core material and its manufacturing method, and a vacuum insulation panel using the core material, in particular to a chopped strand core material (a laminate of chopped strand sheets formed by a wet method) , or on the core material of dry-process glass fiber mat, or on the upper and lower sides of the core material containing wet-formed chopped strands and dry-process glass fiber mat, the vacuum insulation board core with ultra-fine glass fiber cotton sheet It is suitable for home appliance insulation, cold chain logistics, building insulation and other fields. Background technique [0002] At present, the core material of vacuum insulation panels generally chooses porous media materials, such as powdered silica, aerogel, glass fiber or microporous polyurethane, and each material has its advantages and disadvantages. Secondly, when each core board is used, desiccant or getter must be added t...

AI Technical Summary

Problems solved by technology

[0005] The deficiencies of the above-mentioned prior art are: the fiber diameter is thicker, the length is longer (6-13um in diameter, 4-20mm in length), and the fiber is relatively hard; (VIP), in the actual production or use process, the fiber is easy to pierce the aluminized film; therefore, when producing VIP, the outsourcing sealing film generally does not use aluminized film; currently, aluminum foil composite film is used to produce VIP, To overcome the above problems; and this brings new problems, because the aluminum foil composite film contains pure aluminum layer (AL) and aluminum layer (VMPET), and the aluminum layer is relatively thick (generally about 7um), resulting in VIP in In the actual application process, there will be a relatively serious thermal bridge effect, which will inevitably lead to an increase in the overall thermal conductivity of VIP, thereby affecting energy saving effects and product quality.

[0007] The aluminized film contains an aluminized layer (VMPET) instead of a pure aluminum layer (AL), so the thermal conductivity of the aluminized film is much lower than that of the aluminum foil composite film

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