Common printing process of the hottest corrugated

2022-08-24
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Common printing process of corrugated carton

corrugated ink "> carton is a logistics packaging container Integrating Transportation and sales functions. Consumers constantly put forward new requirements for the appearance, environmental protection and function of commodity packaging, making the carton industry continue to meet the comprehensive requirements of external packaging quality and cost in the end market through technological innovation.

only explore ink from the perspective of ink"> printing processing "> in the carton packaging industry, perfect but not aesthetic, moderate but not excessive high-quality external packaging can be obtained in the domestic market. China's printing industry has a large number of Manroland, Heidelberg, gaobao offset printing machines, many of which directly focus on polyurethane, carbon fiber, aerospace aluminum, chitosan, silicon carbide, seaweed fiber, high absorbent resin and other advantageous fields of new materials in our province, and print high quantity (above 400g/m2) And a new generation of micro corrugated printing machines, which can meet the printing of high-quality, medium and short version cartons/boxes; It has nearly 600 unit flexo printing machines, which can meet the printing of medium and long version cartons/boxes; With many flexographic preprint/gravure machines, the printing quality is close to offset printing, and it can also meet the printing of large quantities of color boxes/boxes

offset printing

except that micro corrugated boxes can be directly offset printed, generally corrugated boxes need to adopt the method of offset printing and mounting boxes. This method has simple equipment, complex processes, and a long dry waiting time between printing and mounting processing (generally about 48 hours); The printing process is not environmentally friendly, and the processing process consumes a lot of energy. The basic process flow is: production of single-sided corrugated board + offset printing paper on the laminated synthetic board die-cutting slotted adhesive nail box. The exquisite effect of offset printing paperboard is obtained by sacrificing the strength of the box, because when the opposite paper and single-sided corrugated board are mounted on the veneering machine, the corrugated is compressed and deformed, which will reduce the compressive strength of the box by 10%, and the corrugated automatic production line can not give full play to its advantages, It can only play a semi-automatic role. In order to make up for the loss of strength, the quantity of paperboard remains high, which is inconsistent with the low quantity and high strength process advocated by the industry for many years

considering only the printing effect, offset printing is still at the top of the pyramid, and the number of lines added up to 250 lines/inch is far ahead of flexo printing, which is also the fundamental reason why businesses have always adhered to offset printing. But in fact, some domestic flexo preprint production lines have reached 150 lines/inch, and WSU explained that the visual effect is equal to offset printing. Cartons are mainly used for transportation. Usually, the commodity display function is reflected at a distance of 1m from consumers. At this time, the effect of flexo printing is completely acceptable. From the perspective of carton processing technology, ink "> carton manufacturers are more optimistic about flexographic direct printing.

flexographic direct printing

its production process is corrugated board production. Cardboard direct flexographic printing die cutting slotted adhesive nail box.

flexographic printing has been advocated abroad for two reasons: first, flexographic printing uses water-based ink for printing, which is relatively environmentally friendly; second, it is mainly due to the use of heat dissipation, the flexibility of post printing processing is large, the change speed is fast, and the scrap rate is very low. Flexographic post printing is suitable for large-scale printing Batch long order printing, such as corrugated box printing of beer, beverages and food, is also suitable for small batch short order printing, especially the expensive packaging boxes of large-size computers and household appliances. The biggest advantage of post printing is that it can be produced online, that is, printing, glazing, die cutting, slotting, gluing boxes and bundling can be completed on one machine. The newly-built corrugated box factory can be put into production only by configuring corrugated board production line and flexographic press, while adopting offset printing and pre printing methods requires multiple equipment

there is a certain degree of excessive packaging in China's packaging market, which hinders the promotion of flexo printing technology. However, there are still many factors that will promote the continuous promotion of flexo printing technology in the corrugated box industry

(1) frequent revision or version increase of products, such as Festival Promotion and small package subpackaging, make the printing batch miniaturized. The flexo printing method printed directly on corrugated board has the advantages of high speed, low cost and good quality

(2) brand awareness, corporate image and group design are becoming increasingly popular. Many multinational enterprises not only require their printing quality in China to be consistent with that of their parent company, but also have requirements for printing methods, which will undoubtedly promote the flexographic printing of the packaging market

(3) the market is developing towards intensification and scale, customer inventory is reduced, and more and more packaging materials are required to be directly used after delivery. Flexo printing has a faster customer response speed

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