A kind of solar energy absorption coating and its preparation method and application
A technology of solar heat absorption and heat absorption materials, which is applied in the field of solar heat absorption coatings and its preparation, can solve the problems of slow heat conduction rate, heat waste, low heat absorption efficiency, etc., achieve flexible installation and use, reduce costs, Reduce the effect of spare parts
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[0033] The preparation method of a kind of solar heat absorbing coating of the present invention comprises the following steps: 1) take polyethylene terephthalate resin, pulverize into the particle that size is 3-5mm, standby; 2) take vinyl chloride-ethylene isobutyl Add base ether, binder, black heat-absorbing material and anti-aging agent to the granules obtained in step 1) and mix for 1-5min; 3) Add the mixture obtained in step 2) to a single-screw or twin-screw extruder and extrude Pressing, the temperature of the machine cavity is 75-85 °C, the temperature of the extrusion head is 90-96 °C, the average residence time is not more than 1 min, cooling, tableting with a tablet machine, cooling, and crushing to obtain solar heat-absorbing coatings.
[0034] A kind of solar heat absorber of the present invention, refer to appendix image 3 , attached Figure 4 And attached Figure 5 , comprising a heat-absorbing flow channel 2 made of metal material, the inner surface of the ...
Embodiment 1
[0040] The manufacture method of solar water heater of the present invention comprises the following steps:
[0041] 1) Preparation of the used solar heat absorbing coating for the absorbing coating 4
[0042] a. Weigh raw materials according to the following weight percentages: polyethylene terephthalate resin 60%, vinyl chloride-ethylene isobutyl ether 15%, adhesive 15%, black heat absorbing material 10%;
[0043] B, get polyethylene terephthalate resin, be pulverized into the particle that size is 3mm, standby;
[0044] c. Take vinyl chloride-ethylene isobutyl ether, binder, black heat absorbing material and anti-aging agent, add them to the above granules, and mix for 1 minute;
[0045] d. Add the above mixture into a single-screw extruder and extrude it. The temperature of the cavity is 75°C, the temperature of the extrusion head is 90°C, and the average residence time is not more than 1min. After cooling, the tablet press is pressed, cooled, crushed, Obtain the used so...
Embodiment 2
[0053] The manufacture method of solar water heater of the present invention comprises the following steps:
[0054] 1) Preparation of the used solar heat absorbing coating for the absorbing coating 4
[0055] a. Weigh the raw materials according to the following percentages by weight: polyethylene terephthalate resin 70%, vinyl chloride-ethylene isobutyl ether 5%, acrylic resin modified polysiloxane 12%, barium sulfide 10%, 2% ferrous sulfide, 1% aluminosilicate, wherein the adhesive is acrylic resin modified polysiloxane, the black heat absorbing material is barium sulfide, and the anti-aging agent is aluminosilicate;
[0056] B, get polyethylene terephthalate resin, be pulverized into the particle that size is 5mm, for subsequent use;
[0057] c. Take vinyl chloride-ethylene isobutyl ether, binder, black heat absorbing material and anti-aging agent, add them to the above granules, and mix for 5 minutes;
[0058] d. Add the above mixture into a twin-screw extruder and extr...
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Abstract
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