Vacuum insulation board core material and manufacturing method thereof

Abstract

The invention discloses a vacuum insulation board core material and a manufacturing method thereof. The core material comprises the following components in parts by mass: 50-70 parts of SiO2, 0-7 parts of Al2O3, 2-15 parts of CaO, 0-6 parts of MgO, 8-20 parts of Na2O+K2O, 12-15.5 parts of B2O3, 0.1-7.0 parts of ZnO and at most 1.0 part of other components. By adopting the high-boron-content glass wool microfiber, the core material has the advantages of high fiber strength, high fiber smoothness and smooth molding process, and can be the best core material for a high-performance vacuum insulation board; and since the high-boron-content vacuum insulation board core material has the advantages of high fiber strength and high smoothness, only a small amount of the glass dust drops in the process of producing the core material and manufacturing the dry-process vacuum insulation board, thereby effectively improving the manufacturing environment of the operator and greatly reducing the dust treatment cost of the enterprise.

Description

technical field [0001] The invention relates to a thermal insulation material, in particular to a high-performance core material of a vacuum thermal insulation panel and a manufacturing method thereof. Background technique [0002] The dry-process vacuum insulation panel with ultra-fine glass microfiber as the core material is the best cost-effective A-level inorganic non-combustible material among the known solid insulation materials. It has a broad application market in thermal insulation and barriers. It is mainly used in refrigerators abroad. , Freezers, refrigerated containers, freezers, medical cold storage equipment, vending machines and other facilities and equipment can efficiently and conveniently achieve the effect of energy saving and cold preservation. In China, the application is not yet widespread, and the existing organic materials not only have a combustion level that cannot reach A grade, the thermal conductivity is basically in the range of 0.01-0.02W / m.k,...

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Problems solved by technology

[0002] The dry-process vacuum insulation panel with ultra-fine glass microfiber as the core material is the best cost-effective A-level inorganic non-combustible material among the known solid insulation materials. It has a broad application market in thermal insulation and barriers. It is mainly used in refrigerators abroad. , Freezers, refrigerated containers, freezers, medical cold storage equipment, vending machines and other facilities and equipment can efficiently and conveniently achieve the effect of energy saving and cold preservation. In China, the application is not yet widespread, and the existing organic materials not only have a combustion level that cannot reach A grade, the thermal conductivity is basically in the range of 0.01-0.02W / m.k, and the energy-saving and heat-insulating effect is only about 10% of that of vacuum insulation panels. At present, there is a production process of wet-process vacuum insulation panels in China, which requires adding water to make pulp, and then laying plates for filtration Dewatering, then dehydration, and finally high-temperature drying, the water content is reduced to below 0.4%, and then cut, the production process not only greatly increases the energy consumption, but also the thermal conductivity of the vacuum insulation panel is always above 0.0025w / k.w , and after the service life of the vacuum insulation panel made by wet method is up, it is difficult to recycle because the original glass fiber is broken into extremely fine fibers

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