How to improve the suitability of the upper package of the soft pack of cigarette packs
The soft pack hardened box of cigarette packs has better protection for cigarettes due to its relatively hard pack, and the cigarette pack has better protection for cigarettes, and the novel packaging method which is different from hard packs and soft packs. Popular with tobacco companies and smokers, they are increasingly used in cigarette packaging. However, the use of soft-pack hardened boxes to package cigarettes requires the use of special packaging equipment, which can generally be modified from the original soft packer of the tobacco factory, but the equipment after the transformation has less crease strength, and the packaging of the box-wrapped paper is on the machine. The suitability requirements are high. If it is slightly uncomfortable, it may cause the carton paper jam, the cigarette box is not well formed, and even a large amount of waste products appear. Therefore, how to improve the suitability of the upper package of the soft pack of the cigarette pack is an urgent need for research and solution by the cigarette pack printing enterprise. The years of printing and processing experience of the soft pack hard pack of cigarette packs, as well as the specific research on the actual problems in the packaging process of the tobacco factory, make us realize that in order to improve the suitability of the upper package of the hard pack of the cigarette pack, it must be from the original auxiliary materials. , the processing process, the inspection of finished products are strictly controlled. Raw and auxiliary material control 1. Strictly control the fluctuation range of paper quantitative The quantitative fluctuation of paper is too large, which will cause a series of chain reactions: large fluctuation of paper quantitative → uneven thickness of paper → large fluctuation of indentation after the process → poor suitability of the package on the packaging paper → high indentation The crease of the wrapping paper is not in place, resulting in asymmetry of the box pattern, misplacement of the paste, and even bad packets. The cigarette pack soft pack hardening box generally adopts a paper jam or transfer paper jam with a basis weight of 170-185g/m2, but no matter which paper is used, the quantitative fluctuation of the same batch paper should not exceed 1%; the quantitative fluctuation of the paper between batches cannot exceed 2%, and when the quantitative fluctuation of the paper between batches exceeds 1%, the two batches of paper can not be mixed, and the two batches of paper should be clearly marked, and the die cutting pressure should be based on the quantitative fluctuation of the paper during the post-cutting process. Make adjustments. 2. Strictly control the fluctuation range of paper moisture content Changes in the moisture content of the paper will not only affect the stiffness of the paper, but also affect the shrinkage of the paper during the printing process. Since the temperature and humidity of the printing workshop are well controlled, the water content of the paper generally does not increase during the printing process, but it is more or less reduced, even if offset printing is not the case, because most of the current cigarette pack offset printing adopts UV. Printing, the heat generated by UV curing can cause the paper to lose moisture, resulting in a reduction in paper moisture content. Therefore, the moisture content of the paper before printing is generally controlled at 8% to 10%, but special attention should be paid to the change of water content of the vacuum aluminized transfer paper during the printing process. If it loses too much water during the printing process, the paper fiber stiffness is It will rise, the paper will become brittle, and the "burst" phenomenon may occur during die cutting. After die-cutting, the moisture content of the finished soft-pack hardened box is generally controlled at 6% to 8%, and the water content is too low, which will increase the indentation stiffness. Process control 1. Printing process control (1) Strictly control the folding resistance of printed ink layers The folding resistance of the ink layer of the printed product is not up to standard, which may cause "explosion" at the indentation line during the die cutting process. The detection method generally adopts the "hand folding method", that is, the hand ink color in the bottom layer of the printed product is folded by 180° by hand. If the ink layer at the folding line has no cracks or white spots, the finger wiping line has no color drop phenomenon, that is, It is considered that the ink layer is resistant to folding. (2) Strictly control the wear resistance of the printed ink layer The wear resistance of the printed ink layer is not up to standard, which may cause surface scratches on the packaging paper during the packaging process, thus affecting the aesthetics of the product. The detection method generally adopts the “wear resistance testâ€. When the detection value is ≥70%, it is regarded as the abrasion resistance of the ink layer. (3) Strictly control the surface smoothness of printed products If the surface of the printed product does not reach the standard, it may cause the paper to be unsatisfactory during the packaging process of the packaging paper, resulting in traffic jam. The detection method generally adopts the “slipness testâ€. When the detection value is 0.1 ≤ Uss (static friction coefficient) ≤ 0.3, it is regarded as the print slip degree.
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