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(I) of printing methods for adhesive labels
time:
2020/03/19
Source:
Guangzhou Guangcai Label Co., Ltd.
Emboss
Empress printing self-adhesive label , the printing plate is photosensitive resin relief, printing label has the advantages of full ink. However, the grades of letterpress printing equipment are quite different now. some are still using circular flat letterpress, some are using ordinary rotary letterpress, and some have adopted professional oblique back, satellite or unit type self-adhesive label printing machines. therefore, the transformation cannot be generalized. professional self-adhesive printing machines dominated by embossing have the ability to print films, however, it is necessary to contact the supplier to replace some related parts. For example, the tension control system controlled by servo motor is added, the film surface treatment unit is added, and the precision registration system can be added to the high-grade machine.
Offset
Offset printing is the main way for China's label printing factory to print paper self-adhesive labels. Offset printing is characterized by fine pictures and texts, rich layers, suitable for large-scale printing, and printing equipment can be used in multiple machines, which is suitable for the characteristics of China's label market. However, sheet-fed offset printing is not suitable for printing films with non-absorbent surfaces, because film labels are mostly roll-to-roll printing and require volatile drying ink. Offset printing can print thicker plastic materials, such as in-mold labels and label tags. However, the UV curing device must be installed on the machine, which requires a considerable cost.
Gluing
self-adhesive label glue is divided into water glue and hot melt glue. Because hot melt adhesive equipment has the advantages of small size and low price, and hot melt adhesive has the advantages of environmental protection, intensive, repeated adhesion, recycling and easy operation in the operation process, it is more and more widely used in the label field. The process of hot melt adhesive equipment is composed of several parts such as unwinding-coating-cooling-compounding-winding.
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