Mechanism of infrared drying coating

    When the infrared radiation hits the surface of the car that has just been sprayed with paint, some of the radiation is reflected off by the paint and has no effect on drying. Part of it is absorbed by paint and solvent, which is used to strengthen the thermal movement of solvent molecules and accelerate the volatilization of solvent. The last part reaches the surface of the car, and most of it is absorbed by it, raising the temperature of the surface of the car, and the heat energy released by it further promotes the thermal movement of the solvent, and the other small part is reflected out by the body and has no effect on drying.

    As shown in the following figure, it is the optical path of infrared ray penetrating the paint layer.

    In the figure above, the light path into the paint layer is represented, E and F are air and paint layer respectively. The interface between the paint layer and the carrier. Where A is the incident light, A part of the light is selectively absorbed by the paint layer on the interface E, a part of the light is reflected back into the air by B, and the other part refracts the light C into the paint layer. In the refracted light C, part of the light is absorbed by the paint layer, part of the reflected light D is reflected to the interface E, and reflection and refraction occur again, which is selected by the paint layer to absorb, another part enters the carrier through the interface F, part is absorbed, and the rest is transmitted out