Novel glass fiber vacuum insulation panel core and preparation method

Abstract

The invention discloses a novel glass fiber vacuum insulation panel core. The vacuum insulation panel core is made of low-boron glass cellucotton which has the boric mass percentage of less than 0.5% and the diameter of 0.5-1.0 micrometer. The invention further discloses a preparation method of the vacuum insulation panel core, which comprises the following steps of: (1) selecting the low-boron glass cellucotton, (2) beating and dispersing the selected low-boron glass cellucotton to obtain slurry, (3) diluting the slurry, (4) deslagging the slurry of Step (3) and preparing wet paper in a wet forming manner, (5) dehydrating the wet paper of Step (4); and (6) drying the wet paper of Step (5). The glass fiber air filtration paper has outstanding comprehensive performances; the preparation process is pollution-free; and the service life is long.

Description

technical field [0001] The invention relates to a filling core material of a vacuum heat insulation board, in particular to a novel glass fiber vacuum heat insulation board core material and a preparation method thereof. Background technique [0002] Vacuum insulation panel (Vacuum Insulation Panel, referred to as VIP) is a new type of thermal insulation material, which has low thermal conductivity, good thermal insulation effect, and small proportion of space. It is widely used in refrigerators, refrigerated vehicles, submarines, spacecraft, and satellites. And other thermal insulation fields, environmental protection, energy saving effect is obvious. The selection and production method of the core material of the vacuum insulation panel has an important influence on the performance of the vacuum insulation panel. A small amount of air (including nitrogen, oxygen, water vapor, etc.) will enter the core material of the vacuum insulation panel during the vacuum sealing proces...

AI Technical Summary

Problems solved by technology

The selection and production method of the core material of the vacuum insulation panel has an important influence on the performance of the vacuum insulation panel. A small amount of air (including nitrogen, oxygen, water vapor, etc.) will enter the core material of the vacuum insulation panel during the vacuum sealing process and use. ; If the glass fiber boron content in the core material is high, it is easy to react with the air entering it to produce volatile gas, resulting in secondary outgassing of the core material, making the vacuum degree inside the vacuum insulation panel smaller and the insulation effect worse

[0003] A certain amount of B is often added to ordinary glass 2 o 3 to improve performance, but B 2 o 3 Volatile, in the process of preparing glass fiber by flame method, most of B 2 o 3 It will volatilize into the atmosphere when melting, forming boric acid, causing environmental pollution

In addition, the commonly used glass fiber has a high content of alkali metals, and it is easy to absorb water in a humid environment and gradually lose its strength.

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