Influencing factors of thermal transfer printing
As an important part of the entire printing process, thermal transfer printing is closely related to other printing processes. How to control the stability of this process is an important guarantee for the quality of printed products. Next, let's look at the important factors that affect the thermal transfer process.
1. Thermal transfer printing head
The thermal transfer printing speed depends on the time required for each line of graphics. Therefore, the thermal transfer printing head and the transfer paper should have good heat transfer properties, so that the heat generated by the heating element can quickly pass through the protective layer, the transfer paper substrate and the gap and finally transfer to the surface of the substrate to ensure that the ink has sufficient transfer time.
2. Ink
During printing, the viscosity of different inks is directly related to the heating temperature, and the heating temperature and viscosity of the ink should be strictly controlled. Generally speaking, the closer the ink is to this state, the better the thermal transfer performance.
3. The substrates of thermal transfer medium transfer paper are generally divided into paper substrates, polyester substrates and celluloid substrates, and different substrates have different properties. For example, the material of the thermal transfer paper must be able to withstand the influence of the transfer temperature of the thermal transfer equipment while maintaining the properties.
4. Substrates
Substrates with a slightly rough surface produce better quality prints, which is a distinguishing feature of thermal transfer printing. Because the rough surface of the substrate indicates that the substrate has a large surface energy, the ink on the transfer paper can be well transferred to the substrate to obtain an ideal level and tone; however, if it is too rough, it will affect the ink. Normal transfer is not conducive to the realization of the printing process.
With the development of thermal transfer technology, the range of thermal transfer printing equipment that can be transferred has continued to expand and has also been applied to many industries..For example, thermal transfer equipment technology has also been used in the plastics processing industry..The thermal transfer printing equipment process has the advantages of a simple, fast and pollution-free process, and the obtained printed products have the advantages of rich layers, bright colors, high precision and good picture quality.