Corrugated box preprinting process

Face Paper (web) Printing → Cardboard Production → Die Cutting Slots → Nail Containers / Stickies

Pre-printing has obvious advantages compared with post-printing. Especially in the printing of high-grade cartons (including large and heavy-duty cartons), pre-printing has become the most important production method for corrugated board printing. At present, foreign countries have widely used pre-printed flexo printing. Technical printing corrugated box.

●Higher print quality, more adaptability

The pre-printing is performed on a smooth paper surface using a satellite flexographic printing press. Compared with the post-printing, the group-type printing press prints on the uneven surface of the cardboard, the printing can be carried out at a richer level, and can be suitable for 48 lines of the screen number. Fine print of /cm, 52 lines/cm or 60 lines/cm, and printing quality will be more stable and reliable. Corrugated board flexo and post-printing process due to the "wave peak" and "wave valley" of the corrugated board corrugated board, resulting in the same "coroning board" effect under the printing pressure, making it difficult to print out the exquisite color box surface.

● can make corrugated boxes get the highest strength

Since the pre-printing does not need to imprint the cardboard after it is formed, deformation of the corrugated board and weakening of the cardboard strength can be avoided. With post-printing, each color print causes more or less deformation of the board. Moreover, the greater the number of colors printed, the greater the effect on the deformation of the corrugated and cardboard.

● Higher production efficiency, ease of production management

The pre-printing uses a satellite flexographic printing press. The common printing speed can reach 250m/min or 300m/min. Although the corrugated board post-press can reach a considerable speed, the adjustment and auxiliary time of the preprinting machine and the waste products The rate and downtime rate are significantly lower than the post-presses.

In the flexo printing of corrugated cartons, the factors affecting the quality of products mainly include flexo printing machines, inks, plate making, and cardboard. At present, there are many types of flexo presses suitable for corrugated paper printing in the industry, whether they are imported or domestically produced, and the technology is relatively complete. Especially in domestic equipment, with the gradual increase in the production of flexo printing equipment in recent years, Yigaofa and Beifu Fuji Manufacturers such as Black Bull, etc. have introduced a variety of flexo presses for use in various fields. Among them, there are many applicable models for flexo printing on corrugated board.

In the corrugated board flexo printing ink and plate material, due to the characteristics of the corrugated cardboard itself, the ink and the plate material used are also distinguished from the flexographic printing of other supporting materials.

Source: Global Industry