Organic fireproof foaming composite of water tank of solar water heater

Abstract

The invention relates to the technical field of polyurethane thermal insulation materials, in particular to an organic fireproof foaming material applied to thermal insulation of a water tank of a solar water heater. The material adopts the technical scheme that the material is formed by mixing and foaming isocyanate and a polyether composite, and the polyether composite contains main raw materials such as composite polyether, dimethyl ether, chitosan, an organic flame retardant and expanded perlite. The polyurethane hard foaming thermal insulation material overcomes the defect of great shrinkage after foaming forming, prevents the water tank from deformation, bulking, barring and even cracking, and ensures the thermal insulation property and the flame retardancy of the water tank of the water heater.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation materials, and more specifically relates to a rigid polyurethane foam organic fireproof thermal insulation material applied to the thermal insulation of solar water heater water tanks. Background technique [0002] With the increasing shortage of energy and the increasing pressure on environmental protection, countries around the world have begun to promote the development of renewable energy, among which solar energy is the most widely used and developed renewable energy with the best development prospects, and has been widely used in various industries , the solar water heater industry is one of them. Our country is rich in solar energy resources and has broad prospects for solar energy utilization. At present, it is the first user and producer of solar water heaters in the world. [0003] As we all know, for solar water heaters, the selection of water tank insulation ma...

AI Technical Summary

Problems solved by technology

The foaming method of multiple pouring takes a long time to be completely filled due to the many process steps, which increases the proportion of this "bad foam"

Furthermore, the foam at the junction formed by two adjacent pours, due to the difference in shrinkage, may easily cause the foam to crack when it is cold

[0008]3. Due to other reasons such as low technical level of production operators, poor production facilities, non-standard production process, etc., resulting in unscientific ratio of raw materials or uneven mixing, etc. Operation, seriously affect the performance of polyurethane rigid foam

[0009] Therefore, many polyurethane rigid foam manufacturers adopt methods such as increasing the thickness of the polyurethane rigid foam insulation layer or increasing the density of the filling foam, but thickening the polyurethane rigid foam layer increases the The external volume of the water tank and the amount of materials are expensive, and increasing the density of the foam filling will increase the product weight and thermal conductivity, which does more harm than good, and is not an ideal solution

[0010] In addition, at present, polyurethane rigid foam still has the disadvantage of no flame retardancy. Since some solar water heaters are equipped with electric heaters, if the circuit is aging, it will cause a short circuit and cause a fire. Polyurethane rigid foam is a substance that is easy to burn, so the polyurethane The hard foam is made of flame retardant to avoid the phenomenon of easy burning

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