How to avoid blurry or falling text when thermally transferring pharmaceutical foil?
Publish Time: 2025-03-03
In the field of medical packaging, thermal transfer technology is widely used in the production of labels for products such as infusion soft bags. Pharmaceutical foil, as an important material in thermal transfer technology, has a direct relationship with the quality and safety of the product in terms of the integrity and clarity of its text transfer. However, in actual operation, the problem of blurred or falling text often occurs, which not only affects the aesthetics of the product, but also poses a potential threat to patient safety. Therefore, it is particularly important to explore how to avoid these problems.
First of all, it is key to understand the basic principles of thermal transfer. Thermal transfer is the process of transferring the ink layer on the ribbon or film with text printed on it to the substrate (such as pharmaceutical foil) by heating. In this process, the control of parameters such as temperature, pressure, and time is crucial. For pharmaceutical foil, its surface characteristics, ink matching, and the accuracy of thermal transfer equipment will directly affect the transfer effect.
In order to avoid blurry text, the first task is to ensure the accuracy and stability of the thermal transfer equipment. High-precision thermal transfer equipment can accurately control the temperature distribution of the heating element to ensure uniform melting of the ink during the transfer process. At the same time, stable equipment performance can reduce transfer quality problems caused by equipment failure. When selecting equipment, attention should be paid to the uniformity of its heating system, the stability and accuracy of the pressure control system, and other performance aspects.
Secondly, the selection and matching of inks are also key. The adhesion between pharmaceutical foil and ink is an important factor affecting the transfer effect. Therefore, when selecting inks, its compatibility with pharmaceutical foil, weather resistance, and hardness after curing should be considered. In addition, the viscosity and fluidity of the ink also need to be adjusted according to the specific transfer conditions to ensure that it can be evenly covered and firmly attached to the pharmaceutical foil during the transfer process.
In the thermal transfer process, the control of pressure and time should not be ignored. Appropriate pressure can ensure that the ink is fully transferred to the pharmaceutical foil, while too long a transfer time may cause the ink to melt excessively, resulting in blurred text. Therefore, in actual operation, the transfer pressure and time should be reasonably set according to the ink type, equipment performance, and the characteristics of the substrate.
In addition, the surface treatment of pharmaceutical foil is also a key link to improve the quality of transfer. Through proper surface treatment, such as grinding, cleaning or coating primer, the surface energy of pharmaceutical foil can be improved and its adhesion to ink can be improved. This not only helps to reduce the risk of text falling off, but also further improves the clarity and durability of the transfer effect.
Finally, regular equipment maintenance and care are also important measures to ensure the stability of thermal transfer quality. Regular cleaning of key components such as thermal transfer heads and impression rollers can remove ink residues and other impurities attached to them, thereby maintaining the good working condition of the equipment. At the same time, regular testing and calibration of various performance of the equipment can also timely discover and solve problems to avoid adverse effects on the transfer quality.
In summary, avoiding the problem of blurred or falling text on pharmaceutical foil during thermal transfer requires multiple aspects. By selecting high-precision thermal transfer equipment, suitable inks, and reasonable transfer parameter settings, combined with proper surface treatment and regular equipment maintenance, the quality of thermal transfer can be significantly improved to ensure that the text on the pharmaceutical foil is clear, firm and durable.
