Low-thermal-bridge vacuum insulated panel

Abstract

Disclosed is a low-thermal-bridge vacuum insulated panel. The vacuum insulated panel comprises an upper edge sealing structure and a lower edge sealing structure and are formed by packaging of two high-resistance membranes. The membrane with the large area, namely a main packaging membrane, wraps the periphery of a core. The membrane with the small area, namely a secondary packaging membrane, locally covers the upper or the lower packaging surface of the vacuum insulated panel. The main packaging membrane comprises a plurality of aluminum membrane layers. The thickness of a single aluminum membrane layer is 20-100 nanometers, the outermost layer is of amorphous-state polyamide (PA) or carbon-fiber gridding cloth of 10-15 micrometers, the innermost layer is of a polyethylene (PE) membrane of 50 micrometers, and two to four layers of polyethylene terephthalate (PET) and aluminum membranes are contained in the middle. The thickness of a single polyethylene terephthalate (PET) layer is 15-20 micrometers. The outermost layer of the secondary packaging membrane is of a nanometer PET membrane, inflame-retardant nanometer particles in a nanometer size are evenly distributed in a PET base body, and the layer thickness is 30-50 micrometers; the innermost layer is of a polyethylene (PE) membrane of 50 micrometers, one to three layers of polypropylene (PP) and polyethylene terephthalate (PET) are contained in the middle, and the thickness of the single layer is 12-24 micrometers. The vacuum insulated panel has low surface thermal-bridge effect and good heat insulation effect.

Description

technical field [0001] The invention relates to a vacuum heat insulation panel, in particular to a vacuum heat insulation panel with low heat bridge. Background technique [0002] Vacuum insulation panel (Vacuum Insulation Panel, referred to as VIP) is a new type of high-efficiency thermal insulation material. It is Ozone Depleting Substances), which has the characteristics of environmental protection, high efficiency and energy saving, and is currently the most advanced thermal insulation material in the world. [0003] Vacuum insulation panels are based on the principle of vacuum insulation. By maximizing the vacuum inside the panel to reduce heat transfer caused by air convection, it is mainly composed of three parts: core material, barrier film and gas adsorption material. The core material is generally selected as a porous medium material, with a built-in gas adsorbent and desiccant, and is sealed with a gas insulating material on both sides to form a plate in a vacuum...

AI Technical Summary

Problems solved by technology

At present, multilayer composite film materials are often used for left and right double-sided packaging. Commonly used are aluminum-polyester composite film (Aluminum Foil, referred to as AF and Multilayer AlCoated Foil, referred to as MAF), which contain a large thickness The aluminum foil layer has a serious thermal bridge effect, which causes a large amount of heat to be lost through the conduction of the surface of the membrane material, and the thermal insulation effect is greatly reduced.

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