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Phenolic foam insulation board

Jiang Su Meijiayuan Energy Saving Technology Co., Ltd

Phenolic foam insulation board

Country/Region china

Company Jiang Su Meijiayuan Energy Saving Technology Co., Ltd

Categories Foam Insulation Board

Update 2012-06-14 18:51:53

ICP License Issued by the Chinese Ministry

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In recent years, with the popularity of solar water heaters, solar water heater insulation is increasingly been paid attention.
Thermal insulation layer is not present on the solar water heater products most frequently asked questions. Solar water heaters heat water tank insulation layer of polyurethane insulation materials used mostly by the combination of isocyanate and polyether two materials under certain conditions, chemical reaction, density 40kg/m3 polyurethane insulation when the best results. This density polyurethane, the production process for high pressure and temperature requirements, process difficult to control, if the simple production equipment, process control is not strict, it will produce low-quality polyurethane insulation. Some brands of solar water heater production of small and medium enterprises may use the same materials, but due to technical, financial strength is limited, poorly equipped, resulting in uneven foam material, cell rate is very low, too much foam in some places, easy to heat loss, overnight temperatures can drop 10~ 20 ℃. This poor quality polyurethane insulation in terms of solar water heaters as "Black Cotton" would not achieve insulation.
Secondly, some of the existing solar water heater products foaming process has not been high temperature aging treatment. Solar water heaters on the roof, the long-term high temperature exposure, foam processing if unfamiliar, the reaction is not sufficient, a second high temperature is likely to foam, extruded liner inward and outward expansion, burst outside the barrel the skin. Thus, the use of 3 to 5 years after the solar water heater insulation effect will decline rapidly. As far as I know, because of high temperature aging process will greatly increase the cost, a great number of solar water heater manufacturers are omitted in this procedure.
Furthermore, the rapid development of flat plate solar collectors, but now there are also problems relating to thermal insulation performance. The flat plate solar collectors generally opt for polyurethane foam insulation, or rock wool. Although the high temperature heat-resistant rock wool, but the insulation is limited, in fact, is not the best insulation materials. If the use of polyurethane foam, will appear as polyurethane to withstand long-term high-temperature collectors will shrink the situation has seriously affected thermal performance.
As the phenolic foam in recent years developed a new insulation material, is not known for the solar industry, phenolic foam applications in the solar industry is also unusual.
U.S. good source of phenolic foam applications in solar energy has already begun. Technology Department, said the officer, because they have recognized the advantages of phenolic foam, phenolic foam is considered as a solar water heater tank insulation. The company is also stepping up research and development for phenolic foam insulation tanks and casting equipment, pouring foam material, is expected to soon be able to provide companies in the solar water heater equipment, raw materials and technology.
As for the flat plate solar collectors, the U.S. produced good source of phenolic foam composite board (the middle layer of phenolic foam insulation, aluminum foil on the surface and bottom surfaces of composite galvanized steel or aluminum) can be applied directly. Since the plate has been back with the collector box with composite materials and aluminum materials, simplifying the collector of the production process. And phenolic foam insulation is a professional manufacturer of preformed insulation materials, the quality can be guaranteed.
It is worth mentioning that the price of basic and phenolic urethane foam flat, that is, improve performance, while the use of phenolic foam foam do not increase costs to the enterprise.

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extruded foam insulation board

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