The method of reducing the grammage is limited on the offset printing machine, and the whiteboard paper less than 200 g uses the offset veneer, and after the box is formed, there is an obvious “pan plate†stripe. Cardboard Roll-to-roll Making Corrugated Cardboard Use starch hot glue to quickly gel by steam preheating the cardboard. The hot end ironing board applies pressure to the cardboard plane without damaging the corrugation, and it will not form the "cooking board" stripe. If the efficiency of gravure preprinting is included in the cost, the total cost of the carton will also drop.
The domestic gravure carton was actually developed by the technology of foreign flexographic preprints. With the rapid development of new technologies, there are many advanced packaging concepts worth learning from. ADALISCORP Corporation of the United States is committed to the optimization of corrugated cartons and has introduced a carton reinforcing belt called Sesame, which is suitable for the preprinted cardboard process. A filamentous PVC precoated with a hot melt on the cardboard line is stuck to the corrugated carton layer using steam at a high temperature inside the cardboard line, increasing the strength of the carton by 20%. North American dairy product packaging companies have started to adopt it.
Speaking of advantages, it is said that the gravure preprinted carton has the following advantages:
â—† Color box with high quality and high sensory effect can be obtained;
â—† Accurate barcode replication capabilities;
â—† Better imprinting effect, corrugated won't form imprinting damage, and the carton will get higher strength finally;
â—† Improve the production efficiency of automatic corrugated cartons;
â—† High production efficiency, meet the short time limit, long production volume, and can maintain a constant color and print quality;
â—† The process is simple and convenient for production management.
Compared with imported flexographic preprinting machines, the processing accuracy of domestic gravure preprinting machines is not enough, and some common problems are exposed in the production process of carton factories. With the assistance of the printer factory, the corresponding solution was also found.
Wrinkling: high gram preprinted paper roll tension is about 50kg, more difficult to control than the film (10kg) and thin paper (25kg). When the water is uneven and the thickness is uneven, greater tension changes will cause the cardboard to swing laterally. Form the surface creases of printed products. The preheating device of the paper concave machine can help reduce the tension change caused by moisture loss (when the moisture content is too low, install the humidifier); if you add a flattening roller, you can help the paper roll as far as possible The swing is reduced.
Lubai: mainly due to the dust on the surface of the paper roll and blocked by the ink. The dust and explosion-proof electrostatic ink-absorbing devices installed in the field printing group can separate the air from the dust, improve the ink repellent effect, and reduce the dot loss.
Spiral winding: Because the winding tension of the paper machine is inconsistent with the unwinding tension of the printing machine, the preprinted paper roll responds to the effect of forming a tight, loose, and tight inner winding, which is the cauliflower phenomenon, and the paper roll handling. When the outer cardboard was scattered, affecting the material transport. The unwinding crosscut on the cardboard line is also inaccurate. The PLC computer correcting device can control the tape tension taper. It can measure the paper tension immediately after unwinding, and adjust the winding tension accordingly.
Incomplete edges: The edges of the cross section are not uniform, and the backup roller (receiving rubber roller) can be added to remove air from the paper roll and eliminate static electricity on the surface. When the paper roll receives the material, the roller device is tightened to reduce the edge swing.
The installation of a PLC correction device also helps to alleviate uneven edges. Another solution to the problem of missing edges is offline rewinding.
Roll overlap: If the roll is improperly overlapped during printing, it will cause downtime and affect the consistency of the printed product. Zero-butt connection can be used to pick up the paper without interrupting the printing process.
The domestic gravure carton was actually developed by the technology of foreign flexographic preprints. With the rapid development of new technologies, there are many advanced packaging concepts worth learning from. ADALISCORP Corporation of the United States is committed to the optimization of corrugated cartons and has introduced a carton reinforcing belt called Sesame, which is suitable for the preprinted cardboard process. A filamentous PVC precoated with a hot melt on the cardboard line is stuck to the corrugated carton layer using steam at a high temperature inside the cardboard line, increasing the strength of the carton by 20%. North American dairy product packaging companies have started to adopt it.
Speaking of advantages, it is said that the gravure preprinted carton has the following advantages:
â—† Color box with high quality and high sensory effect can be obtained;
â—† Accurate barcode replication capabilities;
â—† Better imprinting effect, corrugated won't form imprinting damage, and the carton will get higher strength finally;
â—† Improve the production efficiency of automatic corrugated cartons;
â—† High production efficiency, meet the short time limit, long production volume, and can maintain a constant color and print quality;
â—† The process is simple and convenient for production management.
Compared with imported flexographic preprinting machines, the processing accuracy of domestic gravure preprinting machines is not enough, and some common problems are exposed in the production process of carton factories. With the assistance of the printer factory, the corresponding solution was also found.
Wrinkling: high gram preprinted paper roll tension is about 50kg, more difficult to control than the film (10kg) and thin paper (25kg). When the water is uneven and the thickness is uneven, greater tension changes will cause the cardboard to swing laterally. Form the surface creases of printed products. The preheating device of the paper concave machine can help reduce the tension change caused by moisture loss (when the moisture content is too low, install the humidifier); if you add a flattening roller, you can help the paper roll as far as possible The swing is reduced.
Lubai: mainly due to the dust on the surface of the paper roll and blocked by the ink. The dust and explosion-proof electrostatic ink-absorbing devices installed in the field printing group can separate the air from the dust, improve the ink repellent effect, and reduce the dot loss.
Spiral winding: Because the winding tension of the paper machine is inconsistent with the unwinding tension of the printing machine, the preprinted paper roll responds to the effect of forming a tight, loose, and tight inner winding, which is the cauliflower phenomenon, and the paper roll handling. When the outer cardboard was scattered, affecting the material transport. The unwinding crosscut on the cardboard line is also inaccurate. The PLC computer correcting device can control the tape tension taper. It can measure the paper tension immediately after unwinding, and adjust the winding tension accordingly.
Incomplete edges: The edges of the cross section are not uniform, and the backup roller (receiving rubber roller) can be added to remove air from the paper roll and eliminate static electricity on the surface. When the paper roll receives the material, the roller device is tightened to reduce the edge swing.
The installation of a PLC correction device also helps to alleviate uneven edges. Another solution to the problem of missing edges is offline rewinding.
Roll overlap: If the roll is improperly overlapped during printing, it will cause downtime and affect the consistency of the printed product. Zero-butt connection can be used to pick up the paper without interrupting the printing process.
The main purpose of temporary fencing is to provide security, safety, and control in temporary situations. It helps to prevent unauthorized access, protect people and property, and guide the movement of people in specific areas. Temporary fencing can also be used to mark off construction zones, create barriers for crowd management, or designate restricted areas.
Temporary fencing refers to a type of fencing that is designed to be easily installed and removed as needed. It is typically used for short-term purposes such as construction sites, public events, crowd control, and securing temporary boundaries.
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