How to solve the problem of curling of self-adhesive materials in autumn and winter
When the autumn and winter seasons come, different regions in our country will face the phenomenon of sudden changes in temperature and humidity. Taking South China as an example, from February to March every year, due to the high air humidity in spring, we will find that sometimes the floor or walls indoors are wet all day long, and even water droplets condense, and the relative humidity is basically Stay above 80% or even higher. From October to November, the weather turns cold. At this time, due to the dry weather, the relative humidity is basically kept below 40%. Relative humidity refers to the difference in the amount of water vapor contained in the air. The higher the relative humidity, the more water vapor in the air, and the lower the relative humidity, the less water vapor in the air.
When the label material is exposed to this different temperature and humidity environment, the paper material (including the release liner) will immediately react in equilibrium with the water vapor in the air. When the humidity in the air is higher than the water content of the paper, the paper immediately absorbs the air The moisture in the paper will cause the paper to be damp and expand. At this time, the paper will be bent and deformed in the opposite direction; on the contrary, when the humidity in the air is lower than the water content of the paper, the water in the paper will be released instantly and neutralized with the humidity in the air. At this time, the loss of paper moisture will cause the paper to shrink and deform in the same direction to the paper. Therefore, the amount of water vapor in the air exceeds a certain range value, which will directly cause the paper to bend and deform.
This phenomenon of paper water absorption or water loss of paper itself is a manifestation of a physical property of paper materials. / deformation), in general, the temperature and humidity of the material storage and use space should be kept relatively balanced, that is, the effective control of space temperature and humidity. The ideal temperature and humidity conditions for the storage and use of paper materials are: temperature: 23±3℃, humidity: 55±5%.
Of course, when you encounter the problem of material curling (bending/deformation) or the space temperature and humidity cannot be effectively controlled, please feel free to call and let us know, and we will provide you with more detailed handling advice and solutions from a more professional perspective.
