Preparation method of low-cost straw vacuum insulated panel

Abstract

The invention discloses a preparation method of a low-cost straw vacuum insulated panel. Rice straws, wheat straws, reed rods and corn stalks serve as main raw materials of the low-cost straw vacuum insulated panel, and the panel is manufactured through the process of rough cutting, rough screening, secondary cutting, drying, fine screening, bagging, vacuumizing, heat sealing and film pouring. The method is simple in process, high in mechanical degree, high in efficiency, low in cost, free of pollution in the preparation process, economical, environmentally friendly and efficient, and prepared products are low in heat conductivity coefficient and superior in heat preservation and insulation performance.

Description

technical field [0001] The invention relates to a preparation method of a vacuum insulation panel, in particular to a preparation method of a low-cost straw vacuum insulation panel. Background technique [0002] At present, the world is facing an energy crisis, and energy conservation and emission reduction have become the focus of worldwide attention. The use of vacuum insulation panels has attracted great attention, and there are corresponding studies on the preparation methods of vacuum insulation panels. [0003] The Chinese patent with the application number 201110427952.8 discloses a fire-resistant vacuum insulation panel and its preparation method for the external thermal insulation system of building exterior walls; the fire-resistant vacuum insulation panel is composed of fumed silica powder, glass fiber, and glass fiber aluminum-plastic composite packaging bag , It can also mix admixtures, which has dual functions of heat preservation and fire prevention. Put fume...

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Problems solved by technology

[0005] However, glass fibers and many other raw materials and chemical reagents are used in the preparation method of the vacuum insulation panels mentioned in the above-mentioned patents. Long-term inhalation of glass fibers will cause health stress to the workers, and the use and residue of chemical reagents are still It will cause environmental pollution. Considering the serious smog phenomenon, the burning of a large number of straws is one of the main reasons. Therefore, it is undoubtedly a healthy and environmentally friendly choice to use straws as the raw material for the insulation core material of vacuum insulation panels; on the other hand, the above vacuum The preparation method of the insulation board is too cumbersome, the degree of mechanization is not high, and the efficiency is low. Therefore, exploring a simple, environmentally friendly and low-cost preparation method of the straw vacuum insulation board is a hot spot in our future research.