The so-called microwave staining is staining by microwave heating. Microwave can be divided into meter, centimeter wave and millimeter-wave band, 300 ~ 300,000 mHz frequency electromagnetic waves. Microwave drying in the areas of application have been very common, long wavelength electromagnetic waves for microwave in other industrial sectors have been widely used and has been used as a heat source people's daily life. In the dyeing industry, in addition can be used for drying, can also be used for dyeing in the dye fixation, such as high temperature polyester dyeing with disperse dyes printing solid colors and solid colors, you can greatly reduce energy consumption. 

 Microwave dyeing principle is: When the padding fabric dye solution by microwave irradiation, the fiber of the polar molecules (water molecules) by the dipole electric field of microwave frequency, polarization and changes have occurred repeatedly orientation (as in 245OmHz when there are 2.4 billion in the 1s 5 million times the dipole rotation), the molecular friction and heat again, so that will absorb electromagnetic waves can be quickly transformed into heat energy. At the same time, a number of dye molecules under the action of the microwave, it also can induce the heat up, so as to achieve rapid dyeing and fixation purposes. In other words, is the use of microwave heating the fabric under the action of the water in the induction of fever, in order to increase its printed fabrics and paste the above temperature, so the fabric (paste) should maintain a certain water, stained ( or printed) fabric is not dry when the solid color. Microwave dyeing fabric or tow processing methods can be used, not only for hydrophilic fibers (such as cellulose fibers and wool fabrics) staining, in Canada under the appropriate additives, can be used for hydrophobic fibers (such as polyester fiber fabric) staining. Can be reactive dye, direct dyes and cationic dyes. The conventional method of dyeing the fabric soaked pad fluid, and guide people to a closed microwave heating chamber (reaction tank), the role of the microwave, the fabric rapid warming can accelerate the spread of dye in the fiber or solid color reaction. Treatment with conventional staining the same way. For example, the use of disperse dyed polyester and oil-soluble dyes and disperse dyes when dyeing cellulose acetate, carried out by microwave fixation can achieve good results. If the printing paste to add some additives (such as urea), you can speed up and increase the speed of fixing the effects of fixation. 

 Fast, high thermal efficiency, but also the surrounding air and equipment, very little heat loss. Therefore, microwave dyeing some of the advantages with the following: 
 ① microwave can instantly penetrate the material is heated, only a few seconds to a few minutes heating, no warm up. Stop heating is instantaneous, no heat; 
 ② microwave heating is dielectric loss, dielectric loss coefficient of the object to selectively absorb microwave, no part will not absorb microwave heating, to avoid the meaningless warming; 
 ③ thing because it is heated body heat, ambient air and heating devices, which do not and will not cause heat loss, so the thermal efficiency is high; 
 ④ As part of the heated material while heating the entire object can be uniformly heated internal and external, will not like the general surface conduction and internal heating produced large temperature difference; 
 ⑤ can more easily use the power of the size of the table to adjust the amount of heating state; 
 ⑥ microwave heating effect in addition to fast, but also can make water molecules, dye molecules to vibrate, and promote the dissolution and diffusion of dyes. Microwave generating device is a pollution-free devices, but there may be a part of the operation of electromagnetic waves leaking from the heating device caused all kinds of interference, so to take measures to strictly control, electromagnetic shielding in various ways.