The soft film is a heat-extensible material, and due to its material composition and stretching characteristics, problems such as wrinkling, deflection and abnormal size are prone to occur during the working process of the UV printer. After the research and testing of the FORTUNE UV printer technical team, the problems and solutions of such materials in actual printing are summarized as follows.
Soft film wrinkling is divided into two categories, one is caused by the deformation of the ink after being heated, and the other is caused by the material being stretched and flattened. For these two types of wrinkling, the wrinkles appear after the printing is cured, the raised part is not serious, and the printing area is quickly removed, which will not cause nozzle scratches and will not affect normal printing, so these two types of wrinkles Wrinkles are not treated.
Any roll material needs to be tensioned during the conveying process, otherwise the material is prone to wrinkles caused by its own shrinkage or displacement. Such wrinkles will accumulate and be transmitted to the printing area, and there is a hidden danger of scratching the nozzle of the UV printer. The solution to this problem is to make the soft film have a certain degree of tension, which can not only flatten the surface of the material, but also prevent the material from being stretched and deformed too much.
According to the working principle of the UV printer, the inkjet covers the area of the screen, which in theory must be a strictly rectangular block. However, due to the deformation or displacement of the material, the screen usually appears as a parallelogram or an unequal trapezoid. The reason for the problem is that the material was not completely straightened smoothly during the previous step, which caused the material roll to gradually move to a section during the material conveying process, and the phenomenon that one end was tight and the other end was loose (with obvious wrinkles). Throughout the printing process, there will always be an inconsistent stretch at both ends of the material.
