1. When the plastic gravure compound carton process adopts a single-faced corrugated production line, if the glossy paper needs to be coated after printing, and the production volume is large, it may not be printed on the surface paper, but may be printed on the plastic film by a gravure printing method. The gravure printing is completed, and the white base is added. Then the printed plastic film is first compounded with the facial paper, and then the box is formed according to the conventional carton forming process. The characteristics of this process are:
(1) The cost of carton production is low. When the production volume is large, such a process can greatly reduce the printing cost of the tissue paper and the material cost of the tissue paper. Because the noodle paper does not need to be printed, non-coated white paper can be used, so that the cost of the noodle paper is greatly reduced.
(2) beautifully printed. Because plastic gravure is used, the printing effect can be comparable to that of offset printing. It is necessary to pay special attention to the fact that in the process of plate making, full consideration should be given to the dimensional change and deformation of the plastic film; otherwise, the carton face paper will be misaligned with the lower cardboard.
2. Coated paper gravure composite carton process When the production volume is relatively large, do not need to film, and requires good printing effect, low cost, you can use this process. The process is to use a paper gravure printing machine to print thinner coated paper, and then composite this finely-printed coated paper with ordinary slagboard or boxboard paper. The whole is used as cartonboard paper, and then it is used for confrontation and normal carton forming. Processing. The characteristics of this process are:
(1) The cost of carton production is low. The main reason for the reduction in cost is to convert whiteboard paper to low-weight coated paper in combination with cheap linerboard, which reduces material costs.
(2) beautifully printed. Paper gravure printing is very beautiful.
(3) Gravure printing plates are more complicated and costly, and are not suitable for printing carton products that are often revised.
(4) The operation and control methods of the printing process, such as paper compounding and box making, should be carefully explored, accumulated, and reasonably implemented. Otherwise, it is easy to increase the scrap rate.
3. Direct offset corrugated carton process Corrugated carton direct offset process is currently relatively mature abroad, it is the corrugated board directly on a special offset press for printing. Suitable for processing thin corrugated boxes.
The process can not only guarantee the good moldability of the carton, but also can complete the exquisite glossy paper printing. However, the printing machine used is relatively expensive. At present, it is not yet in line with China's demand standards, and it is not suitable for the carton industry in the near future. However, in the next few years, this process may become a new direction for the development of high-end carton printing in China.
4. Flexo preprinted and gravure preprinted corrugated box processes
This year's development is relatively fast, both of these processes are first to use web printing paper, and then complete the production of corrugated cardboard in the automatic corrugated board production line. Carton printing quality and molding quality are relatively high, but the investment is relatively large and it is not suitable for small batch production.
In the domestic carton industry, the application of three conventional corrugated box printing methods is relatively common and has become the mainstream method for corrugated box printing. The new type of printing box method, due to the hot spots of equipment, materials, processes, operations and other technology has not yet been fully grasped, the investment is relatively large, the promotion of the difficulty is still relatively large. However, in order to improve the quality of cartons, reduce the total cost of the cartons, obtain maximum profits, and increase the competitive advantage in the market, it is imperative to adopt a new type of box-making technology.
From the general development of the carton printing process, the plate making and printing technology of the flexographic plate printing corrugated box process needs to be improved as a whole. The plastic gravure printing, the carton gravure printing and the web offset printing process need to be promoted and improved. Direct offset printing and preprinting Corrugated box production process should also arouse our concern.