Polyimide-phosphogypsum color steel sandwich panel and preparation method thereof
A technology of polyimide and phosphogypsum, applied in chemical instruments and methods, layered products, buildings, etc., can solve the problems of polluting the environment, occupying land resources, etc., achieve simple preparation process, improve application safety factor, and reduce heat conduction The effect of coefficients and bulk density
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Embodiment 1
[0033] Such as figure 1 As shown, a polyimide-phosphogypsum color steel sandwich panel includes a first protective layer 1, a first steel layer 2, a polyimide insulation layer 3, an isolation layer 4, a phosphogypsum insulation layer 5, and a second Steel layer 6, second protective layer 7;
[0034] An isolation layer 4 is arranged between the polyimide insulation layer 3 and the phosphogypsum insulation layer 5; the other side of the polyimide insulation layer 3 is a first steel layer 2, and the first steel material 2 The outer side of the layer is the first protective layer 1; the outer side of the phosphogypsum insulation layer 5 is the second steel layer 6, and the outer side of the second steel layer 6 is the second protective layer 7;
[0035] Between the layers of the first protective layer 1, the first steel layer 2, the polyimide insulation layer 3, the isolation layer 4, the phosphogypsum insulation layer 5, the second steel layer 6 and the second protective layer 7...
Embodiment 2
[0046] Compared with Example 1, it is further improved that the first protective layer is epoxy resin; the first steel layer is a hot-dip galvanized substrate; the isolation layer is composed of double-layer aluminum alloy plates, and the double-layer The aluminum alloy plate is a rectangular groove structure between layers, and the groove is filled with sound-absorbing cotton.
Embodiment 3
[0048]Compared with Example 2, it is further improved that the isolation layer is made of aluminum foam, and the aluminum foam is closed-cell aluminum foam with a pore diameter of 1-5 mm, a porosity of not less than 75%, and a thickness of 5 cm.
[0049] Respectively test the thermal conductivity, sound insulation, and combustion performance of a polyimide-phosphogypsum color steel sandwich panel in the above-mentioned embodiments 1 to 3 under the same environment, and the comparative example is a conventional commercially available extruded polystyrene sandwich panel . The thermal conductivity is measured in accordance with GB / T 10294-2008 "Determination of Steady-state Thermal Resistance and Related Properties of Thermal Insulation Materials with Protective Hot Plate Method"; the sound insulation is measured in accordance with GB / T 50121-2005 "Building Sound Insulation Evaluation Standard"; The combustion performance is tested according to GB8624-2012 "Classification of Comb...
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