The transfer printing fabric requires the temperature t […]
The transfer printing fabric requires the temperature to be controlled within the range of 180℃ ~ 230℃ for about 10 ~ 30s. Meanwhile, attention should be paid to the reasonable allocation of temperature and time.
The pressure is also one of the important parameters of the thermal sublimation transfer process. If the pressure is too low, the gap between the fabric and the transfer paper is large, the yarn is round, and the ink gas molecules collide with the air in a large amount to escape, resulting in poor printing effect. At the same time, the ink is easy to seep away and the lines become thicker, thus blurring the patterns and patterns and deteriorating the visual effect. If the pressure is appropriate and the gap between the flat fabric and the transfer paper is appropriate, the transfer printing effect is good, the pattern is clear, and the lines are smooth and fine. If the pressure is too high, problems such as deformation, fuzzing and morphological changes of heavy fabric are easy to occur, resulting in defects such as rough hand feeling and superficial colouring. Therefore, it is very important to control the improved printing pressure for printing patterns, clear patterns and visual effects.
Besides ink, temperature, time and pressure will affect the quality of thermal sublimation transfer printing, there are also some matters worthy of our attention in the actual production process. First of all, the transfer paper is selected. Suppliers with stable quality and high credibility are from printing enterprises *: Secondly, it is necessary to realize that the colour of dye ink before transfer (the pattern on transfer paper before heating and pressurizing) and after transfer (the pattern on fabric) is very different. Generally, dye ink looks dark and dull before transfer. It depends on the high temperature of about 200℃ to restore true colour. In this way, proofing before printing production is very necessary. During the thermal transfer, it is necessary to ensure that the hot-pressed surface, transfer paper and the surface of the substrate closely adhere without gaps. Otherwise, the transfer image and text may be blurred.