A kind of preparation method of vacuum insulation panel

Abstract

The invention relates to a preparing method for a vacuum heat insulation board. The preparing method comprises the following steps that firstly, glass beads, glass fibers, active carbon fibers and the like are mixed at a proportion; secondly, the mixture obtained in the first step and a methylcellulose saturated solution are fully stirred and mixed into a flocculent state; thirdly, the mixture obtained in the second step is uniformly poured onto a stainless steel screen according to the thickness requirement, and a vacuum heat insulation board core is obtained after airing, drying and cutting; fourthly, the vacuum heat insulation board core is put into an isolation packaging bag, vacuum pumping encapsulation is carried out, and the vacuum heat insulation board is obtained. In the first step, the glass beads account for 30-50%, the glass fibers account for 49-69%, and the active carbon fibers account for 1-6%. The mesh number of the screen is 60-90. The glass beads are hollow. The preparing method for the vacuum heat insulation board is easy and convenient to implement, the heat insulation effect of the vacuum heat insulation board is greatly improved, and meanwhile the vacuum heat insulation board is light, good in flexibility and capable of being bent by around 10%. Meanwhile, the problem of bulging is effectively solved through the screen airing and drying mode.

Description

technical field [0001] The invention relates to the field of thermal insulation materials, in particular to a preparation method of a vacuum thermal insulation panel. Background technique [0002] Thermal insulation materials are widely used, such as packaging industry (such as organ transplant transportation), refrigeration industry and construction industry, etc. The current thermal insulation materials are mainly composed of glass fibers and powdered materials (such as aerogels), such as China Utility model patent 200420053407.2 discloses a vacuum insulation panel, which includes an outer shell and an insulating core material arranged in the vacuum outer shell. The core material includes silica airgel and glass fibers, and the glass fibers are interwoven with silica gas. between gels; but the insulating core material silica airgel of the aforementioned technical scheme is brittle, and the strength of the panel after being processed into a vacuum insulation panel is relati...

AI Technical Summary

Problems solved by technology

[0002] Thermal insulation materials are widely used, such as packaging industry (such as organ transplant transportation), refrigeration industry and construction industry, etc. The current thermal insulation materials are mainly composed of glass fibers and powdered materials (such as aerogels), such as China Utility model patent 200420053407.2 discloses a vacuum insulation panel, which includes an outer shell and an insulating core material arranged in the vacuum outer shell. The core material includes silica airgel and glass fibers, and the glass fibers are interwoven with silica gas. between gels; but the insulating core material silica airgel of the aforementioned technical scheme is brittle, and the strength of the panel after being processed into a vacuum insulation panel is relatively poor, especially when used in the construction industry, parts such as nails and steel bars are easy to Puncture the heat insulation board, the glass fiber will expand, and at the same time, because the pulverized airgel has poor stirring effect, it is not easy to disperse, and it is easy to absorb water, which will affect the heat insulation effect and use stability of the heat insulation board

When glass fiber-based vacuum insulation materials are used in building wall insulation projects, damage and air leakage during transportation and construction will cause vacuum insulation panels to expand and cause wall decorative surfaces to fall off, bringing great safety hazards

[0003] The existing method of preparing vacuum insulation panels with a core material composed of glass fiber and airgel generally adopts conventional steps such as mixing the components and dehydrating to obtain the core material, and then putting the core material into a packaging bag. The prepared vacuum insulation panel not only has a general heat insulation effect, but also the fragile glass fiber will expand when used in the construction industry, and there is a problem of air bulging