High vacuum barrier film with double heat-seal layers, and preparation method of high vacuum barrier film

Abstract

The invention discloses a high vacuum barrier film with double heat-seal layers, and a preparation method of the high vacuum barrier film. The high vacuum barrier film with the double heat-seal layerscomprises the external heat-seal layer, a nylon layer, a polyester aluminized film layer, an aluminum foil layer and the internal heat-seal layer which are sequentially arranged from outside to inside. The preparation method comprises the following steps: compounding the polyester aluminized film layer with the aluminum foil layer by hot-pressing so as to obtain an intermediate product A; enabling the aluminum foil layer of the intermediate product A to be contacted with the internal heat-seal layer, and compounding by hot-pressing so as to obtain an intermediate product B; coating the nylonlayer with the external heat-seal layer to obtain an intermediate product C; adding a bonding agent into a space between the nylon layer of the intermediate product C and the polyester aluminized filmlayer of the intermediate product B, and compounding by hot-pressing so as to obtain an intermediate product D; placing the intermediate product D in an environment of 50-60 DEG C for 12-15h to obtain the high vacuum barrier film with the double heat-seal layers. The high vacuum barrier film provided by the invention is provided with the double heat-seal layers, can enable the internal heat-seallayer to be in hot melting connection with a core material when being used for preparing a vacuum insulated panel, and is good in sealing property and puncture-resistant.

Description

technical field [0001] The invention relates to the technical field of thermal insulation of external walls, in particular to a high-vacuum barrier film with double heat-seal layers and a preparation method thereof. Background technique [0002] my country is a big energy-consuming country. With the continuous and rapid development of my country's economy, building energy consumption accounts for about 30% of the total energy consumption of our society, and the form of building energy conservation is urgent. The climate in various regions of our country is quite different, and the requirements for building energy-saving design in different regions are different. GB50176-1993 "Code for Thermal Engineering Design of Civil Buildings" clearly states that the design requirements for regions with hot summer and warm winter are "must fully meet the heat protection requirements in summer, Generally, winter heat preservation is not considered.” The industry has reached a consensus th...

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Problems solved by technology

[0004] Although the thin plastering of the external insulation board has a good insulation effect, it has disadvantages such as complicated construction technology, high comprehensive cost, and difficulty in guaranteeing the construction quality of the surface material; the vacuum insulation board is easy to be punctured during installation or use, resulting in Expansion effect, which will cause it to lose its insulating properties