Puncture-resistant and high-heat-insulation vacuum insulated panel and preparation method thereof

Abstract

The invention belongs to the technical field of heat insulation, and particularly relates to a puncture-resistant and high-heat-insulation vacuum insulation panel and a preparation method thereof.The vacuum insulation panel comprises a VIP core material, a composite TPU barrier film and an aluminum laminated film, and the VIP core material is arranged in a sealing bag composed of the composite TPU barrier film and the aluminum laminated film; the composite TPU barrier film comprises an aluminum film layer and a modified TPU thin film fully attached to the aluminum film layer through glue, the aluminum film layer and the modified TPU thin film form a modified TPU dry laminating film, and the modified TPU dry laminating film further comprises a high-heat-insulation coating coated on the outer surface of the modified TPU thin film. Compared with a traditional edge folding mode of a yin-yang film structure, redundant flashes of the barrier film are folded to the face without the aluminum foil layer, namely the aluminum foil layer is folded to the aluminum laminated film layer, and the possibility of air leakage caused by wrinkles in the aluminum foil face can be reduced.

Description

technical field [0001] The invention belongs to the technical field of heat insulation, and in particular relates to a puncture-resistant, high heat-insulation vacuum insulation panel and a method for folding the edges thereof. Background technique [0002] Vacuum Insulation Panel (VIP for short) is a new generation of thermal insulation material that has developed rapidly in recent years. When the thermal insulation technical requirements are the same, it has the advantages of thin thermal insulation layer, small volume and light weight. High-efficiency insulation materials with the lowest conductivity are called super-insulation materials. [0003] The excellent thermal insulation performance of the VIP board is due to its high vacuum degree, and the barrier film is the key to maintaining its internal vacuum degree. It can effectively block oxygen, nitrogen, water vapor, carbon dioxide and other gases to destroy the vacuum environment inside the board during the service p...

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Problems solved by technology

[0005] In addition, because the ductility of aluminum foil is relatively poorer than that of plastic film, and it has a certain hardness, it may cause creases on the aluminum foil layer when the vacuum insulation panel is folded, so that some tiny pores are formed in the barrier bag, allowing external air to enter. , which will affect the service life of the vacuum insulation panel, and even cause the thermal conductivity to increase greatly and directly fail

[0006] Surface barrier films are gradually evolved and developed based on the two principles of improving the ultimate barrier of the film itself and reducing the thermal bridge effect as much as possible. However, the principle of improving the robust strength of the barrier film itself has not been carried out. Many studies have been conducted. Usually, although the protective layers such as polyester film (PET) and nylon plastic (PA) on the outermost layer of the multilayer composite film have a certain mechanical strength, due to the limitations of its own structure, there are still wear-resistant , poor puncture resistance and slight gas permeation. As far as the practical application of vacuum insulation panels is concerned, the existing surface barrier films cannot effectively resist mechanical stress and tension to prevent damage caused during manufacturing and installation.

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