Changsha packing factory corrugated carton commonly used printing method

[Chinese Packaging News] Corrugated cartons are an ordinary paper packaging product inseparable from our lives. The printing quality of corrugated cartons is not only related to the appearance quality of corrugated cartons, but also affects the sales prospects of the packed products and the production of goods. The company's image. Therefore, it is particularly important to analyze how to improve the surface printing effect of corrugated boxes, how to select suitable printing technology, and further reduce the cost of carton processing.

First, the corrugated board processing technology: corrugated board processing technology is divided into two categories

1. Production technology of automatic corrugated board production line The corrugated board production process is widely used, with advantages of large production volume, large carton forming volume, and good quality of crucible type. The corrugated board produced by the process is usually made into cartons through processes such as water-based printing, grooving, sticking, and forming. The cartons produced with this technology are primarily used for transport packaging.

2. Production process of semi-automatic corrugated board production line The corrugated board production technology is to print the face paper first, and then combine it with corrugated paper and paperboard. The corrugated paperboard produced by this process is made into boxes using die-cutting indentation and adhesive nailing. The carton produced by this technology has good molding quality and good surface treatment. Carton boxes produced using this technique can be used for sales packaging.

Second, conventional carton printing methods: conventional carton printing methods are mainly flexo, offset and screen printing three

1. Flexographic Printing Corrugated Boxes Conventional flexographic printing corrugated box technology prints directly on corrugated paperboard, using water-based inks, and thus some people call this technique watermarks. Flexo printing has the following features:

(1) Large format. The maximum width of the wide-format flexographic printing press can reach 2.5m~2.8m.

(2) The offer is low. The flexographic print has high resistance to printing and can be used repeatedly; ink quotes are also lower.

(3) It can be linked to production, such as printing, grooving, indentation, ordering (sticking) boxes, bundling and so on.

(4) The carton strength decreases less. Because flexo printing is light pressure printing, it has little effect on the strength of corrugated cardboard.

(5) The printing accuracy is not high, the conventional offset printing line number is 175 lines/inch, and the conventional printing line number of the flexible printing carton is 35 lines/inch~65 lines/inch, due to the low-precision printing method, the most suitable line for printing text Although the print quality of four-color drawings has improved over the years, there are still limitations.

(6) There are difficulties in making plates, the writing of text lines is simple, and four-color drawing plates are more difficult.

(7) The print quality is not very stable. It is mainly reflected in the darkness of the printed ink. The flexographic direct printing technology is applicable to the first-class carton production technology process and is now widely used in China's carton factories.

2. Offset Printing Corrugated Boxes Conventional Offset Printing The corrugated boxes use a direct printing method, that is, the printing of cardboard boxes first, then the printed sheets of paper printed on corrugated cardboard