1. Unwinding
(1) Intermittent type: There is no tension change when the roll paper is unwinding, so no adjustment is required. It is used on flat flattening and round flattening labeling machines, and the unwinding speed is slow. Since this type of equipment does not have a paper positioning correction device, the end face of the web is required to be clean to ensure accurate overprinting during printing.
(2) Continuous type: It is applied to the rotary labeling machine. Since the paper tension changes when the diameter and speed of the roll paper changes, the device has automatic or manual tension control mechanisms, as well as a roll paper correction device to ensure smooth paper feeding and printing quality.
Second, bronzing
Flattening: It is applied to the circular flattening and flattening labeling machine, and the speed is low.
Circular pressing: It is applied to the circular pressing and round label printing machine, with high speed and continuous hot stamping. Generally, it is rarely used, and the stamping process is generally used instead of hot stamping.
3. Printing
Flattening: suitable for small area, simple pattern printing, such as price tags, barcodes, etc.
Circular flattening: suitable for label printing with solid, general patterns, and simple color halftone printing.
The round press is suitable for all kinds of pattern label printing, especially suitable for secondary color halftone label printing.
UV printing: In the above three printing methods, after adding UV drying, film self-adhesive materials can be printed.
4. Bronzing first, then printing
On the equipment without UV drying, using ordinary ink, the disadvantage is that the printing pattern design is limited.
5. Printing first, then bronzing
It is applied to equipment with UV drying device. After the ink is dried quickly, the ink can be gilded on the ink. The gilding pattern can be arbitrarily designed without the restriction of the ink. It is suitable for the printing of secondary labels. It is an advanced production process.
6. Glazing
Field varnishing: Coating a layer of varnishing oil on the surface of the ink, the purpose is to protect the ink layer, prevent moisture, waterproof and improve the surface gloss. It can replace the laminating process and use the UV drying method.
7. Lamination
The purpose of laminating on paper or film material is to protect the ink, waterproof, moisture-proof, increase the strength of the label, and increase the three-dimensional effect of the pattern. Lamination is divided into liner lamination and linerless lamination. Due to the low cost of the latter, it is currently widely used. According to the requirements of the process, there are two kinds of composite transparent film and matt film, the former is more commonly used.
8. Punch holes
The application is not universal, mainly used for labels printed by computer. The requirement is to punch positioning and driving holes on both sides of the label, or the label applied on the price tag gun, and it is required to punch holes in the middle of the label for positioning and driving.
9. Die cutting
The die-cutting of self-adhesive labels is a semi-cut-through process, that is, only the surface material is cut through and the backing paper is retained. There are two processing methods:
Such as flat die cutting, suitable for all kinds of label printing machines, manual plate making, low cost, short plate making cycle, but low viscosity, suitable for short-run live printing processing. At present, almost all domestic label factories adopt the flat die-cutting method. The other is circular die-cutting, which is applied to circular pressing and circular labeling equipment. It has fast speed and high die-cutting viscosity. It is suitable for long-running jobs. At present, the die-cutting rolls of domestic manufacturers are generally processed abroad.
10. Receiving paper
It can be roughly divided into cut sheet delivery and folded sheet delivery.
