In the wet and rainy season, important matters for the storage of self-adhesive label paper after UV coding

Recently, the country has entered the flood season. With the advent of the rainy season, the temperature continues to rise. Different types of paper and film materials behave differently under the influence of external temperature, resulting in different problems in the use of self-adhesives. For example, the coated paper sticker is printed with two-dimensional code, text and other high-definition content in the UV coding process, and when it is used in the workshop, and with the passage of time, the label wrinkles on the bottle body become more and more serious. This is because it is the rainy season and the temperature in the customer's production workshop is relatively high. The coated paper sticker is sealed and stored in a plastic bag after UV coding. Therefore, the moisture content of the label itself has a large gap with the moisture content of the customer's production workshop. , The label rapidly absorbs water and swells during a period of time after labeling, causing wrinkles. This situation is solved from the angle of coding by changing the label processing technology. The coating process can be used to replace the varnish process, which can effectively block the label from absorbing external moisture, thereby reducing the probability of wrinkles. What should I do if the coated paper self-adhesive label wrinkles after UV coding? First, the outer packaging of the label can be opened before labeling and placed in the labeling workshop for a period of time before labeling. In this way, the label can be fully balanced with the humidity of the labeling environment, and the label will not cause swelling and wrinkles due to excessive water absorption after labeling. Second, in the printing process, a secondary rewetting method can be used to increase the moisture of the label. For example, a humidifier can be used to humidify the bottom paper of the label during label processing and die cutting to ensure that the label is not too dry, thereby reducing the influence of changes in external humidity on the label. Third, strengthen the control of temperature and humidity in the workshop, the printing temperature is between 20-25 degrees Celsius, and the relative temperature is between 50-60%. Therefore, the finished product of the coated paper self-adhesive label after printing by the UV inkjet printer needs to be done by the company. Good temperature and humidity control in the workshop can fundamentally solve this problem.