Corrugated packaging and printing
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1 Corrugated and its use In Japan, Type A corrugated and Type B corrugated boxes are generally used for transporting outer packaging boxes. The beer boxes mentioned at the beginning of this article are generally made of B. E楞 is used as a single-piece box with certain aesthetic requirements and appropriate weight contents, such as the “Chinese New Year Festival” in July and the packaging of the year's unsold items, and the packaging of Christmas cakes. F-type corrugated and G-shaped corrugated, called micro corrugated, is a very thin corrugated, used as a disposable packaging container for hamburgers, cream fillings, etc., or as a micro-electric product such as a digital camera, portable stereo, and refrigerated. The packaging of the goods.
2 Corrugated packaging printing There is no special printing method for corrugated printing, regardless of embossing, gravure or offset printing.
1) Letterpress printing (flexo printing) The beer box mentioned above is in the embossing process. Before the corrugated paper is processed in the corrugated shape, it must first be sent to the flexo printing machine for printing, and then it is combined with the corrugated core and another lining. The paper is bonded and becomes a corrugated packaging material. Corrugated paper is made of a resin material, whether it is a rotary printing or a single printing. Flexographic printing using water-based inks is a very effective printing method, regardless of the smoothness of the liner used to produce corrugated paper, which can be printed accurately and at high speed. In addition, the flexo ink has good opacity and can be printed in brilliant colors on the kraft base paper used for the production of cross-cut paper. In the plate making process of the resin relief used in the past, the cleaning process using an organic solvent is indispensable. Recently, some media considering environmental compatibility, such as a plate which can be used only by washing, has been adopted from the plate making process; A plate that can be used for thermal development; a plate that uses a liquid photographic material for UV curing (recycling of unsensitized liquid), etc., is a printing method that incorporates environmental compatibility. However, in Japan, the high-speed line technology of flexo printing has not made much progress, and the flexo printing products seen by the stores are mostly 80 network products. In Europe and the United States, especially in Europe, the printing method of corrugated paper is mainly based on flexo printing, and the flexo printing products of 100-140 network cable can be seen. The reason for the high-fidelity line of flexo printing can be said to be strongly adopted by the environmental coordination process in Europe. Japan has high requirements for the reproduction accuracy of printing. The exquisite printing is realized by offset printing and gravure printing. It is a so-called grainless photo. Reproduce the result of the (175Lpi) consciousness that works strongly.
2) Although gravure printing is the same as gravure in gravure printing, paper gravure printing machine is different from soft packaging gravure printing machine, and it is necessary to transfer ink by applying large printing pressure. Therefore, plate cylinder and pressure The printing cylinder is large and heavy, and it is a printing method for large-volume products. In addition, since gravure is a printing method different from flexo printing, the printing paper must have a good smoothness. The gravure printing with a large amount of ink coating is thick, and compared with offset printing and flexo printing, it is a printing method which is highly evaluated in deep printing. In order to correspond to environmental measures that limit VOC emissions, it may be considered to correspond to water-based gravure in the future.
3) Lithography The so-called lithographic printing is offset printing. When it comes to corrugated offset printing, the past process is generally to first perform offset printing on a cardboard, etc., and then attach it to a single-faced corrugated paper. About 10 years ago, due to the widespread use of G-type corrugated, very thin G-type corrugated paper can be printed directly on the offset press. This direct offset printing process can reduce the number of processes compared to the process of printing on cardboard and then bonding to a single-faced corrugated, thus theoretically having advantages in terms of delivery and cost, but the greater advantage is the G-shaped corrugated Offset printing can be performed directly, which can greatly reduce the amount of paper used. The reduction in energy consumption during production becomes a reduction in costs and a reduction in CO2 emissions; a reduction in transportation energy consumption is associated with a reduction in transportation costs and a reduction in CO2 emissions. A practical example is that digital cameras and other products use air transportation. If it is shipped to New York and the packaging is reduced by 10g, the air transportation phase can reduce CO2 emissions by 152.9g. The G-shaped ultra-thin micro corrugated packaging has high strength, thin thickness, small volume and beautiful printing. As a packaging that corresponds to the environment, it will be more noticeable in the future.
3 Weight-type content packaging applications A typical example of corrugated packaging, a beer box made of type B corrugated, is being used, while a G-shaped corrugated box is being used overseas. Even in the packaging of heavy-weight contents, packaging that is beautiful and beautiful and compatible with the environment will be increasingly pursued in the future. It can be said that the printing method with wide application range, popular popularity and attractive to users will be pursued by people.