Neverland,gidle lightstick,gidle merch Shanghai Liuyuan Trading Co. , Ltd. , https://www.ly-weighing.com
The corrugated box is formed by joining together two corrugated cardboard sheets of the same area.
Carton area = (87.5 cm x 62.5 cm) x 2/1000 = 1.094 m2.
Corrugated cardboard paper printing
In the past, corrugated cartons were mainly used as transport packages. Customers did not pay much attention to the appearance of corrugated cartons. In recent years, people have gradually realized the importance of the exquisite appearance of the packaging and its promotional effect on the goods. Corrugated paperboard printing from the monochrome becomes more and more colorful.
Corrugated cartons generally take pre-printed paper. And then with the corrugated board paste way. The printing methods for the tissues include offset printing, flexographic printing, and gravure printing in various forms. The surface layer of offset printing paper is rich in layers, strong in color and good in quality, and is very suitable for short-lived and flexible personalized market demands. Most of the flexographic printing uses water-based environmental protection ink, which has the advantages of being non-toxic, non-polluting, and environmentally friendly. It is suitable for long-lived printing and can produce large-format multi-color corrugated cartons. Gravure printing production efficiency, printing speed up to 150 ~ 200m/min, printing color number up to 4 to 10 colors, but also for gold and silver inks and other special ink printing. Because the gravure is made of steel chrome-plated electric gravure, the resistance force can reach 3 million to 4 million in India, which is very suitable for the production of long-lived corrugated boxes.
Preprinting methods have special requirements for facing paper. Paper often uses coated whiteboard paper, hanging pulp whiteboard paper, white cardboard, etc., which have advantages and disadvantages. Coating white paper has a good color expression, but through the corrugated board production line when the high temperature drying tunnel is attached, the paper surface coating will have varying degrees of change, affecting the graphic surface color effect. White pulp paper can meet the high temperature requirements in the bonding process to a large extent. However, the rough surface of the pulp white paper can easily cause image loss and false printing, and the consumption of ink is also relatively large. White cardboard is the first choice for corrugated cardboard. It not only fully expresses the color effect of printed graphics, but also adapts well to the special requirements of high-temperature lamination processes.
In addition, the ink used in the printing of corrugated box paper should be selected with good heat resistance and good friction resistance. Otherwise, when the printed glossy paper is pressed and dried, the printing image will be drawn and the ink will be lost. Seriously affect the surface quality.
Corrugated cardboard fit
The printed colored glossy paper needs to be affixed with corrugated cardboard, which is one of the production processes of corrugated cardboard boxes. Veneer adhesive is an important raw material for corrugated cardboard. Adhesives consist of starch, water and auxiliary materials, oxidants (potassium permanganate, hydrogen peroxide), pasting agents (sodium hydroxide), crosslinkers (borax), defoamers (tributyl phosphate, silicone oil), desiccants Etc.
The proportion of empirical formulas for the adhesive of the automatic gluing machine is: water 1000 kg, starch 190-250 kg, potassium permanganate 3.5-4.0 kg, sodium hydroxide 24-28 kg, borax 6-7 kg, desiccant 70-80 kg. Tributyl phosphate is added as appropriate. Whether the proportioning agent of the adhesive can achieve the best process quality effect is closely related to the actual production environment conditions and product characteristics, and should attract our attention.
The veneering process plays a decisive role in the quality of corrugated boxes. After the color paper and corrugated boards are laminated, no obvious phenomenon of seepage is required. The deviation of the fitting rules should be less than 3mm. The corrugated thickness of the corrugated cardboard after pressing is applied. The loss should be less than 2%. During the process of flattening and pressing the color paper and corrugated cardboard, no damage shall be allowed to the text and graphics of the color surface. It is required that the color paper and the single-faced corrugated cardboard should be firmly attached to avoid the phenomenon of degumming. The finishing process can ensure the normal production of die cutting.
Corrugated box joint
The corrugated boxes are joined together by die-cut corrugated cardboards to form a complete combined corrugated box.
Corrugated boxes are joined in three ways: metal nails, tapes, and adhesives. The metal nailing method is a method of applying more box joints and nailing along the centerline of the overlapping portion with a metal nail. The tape bonding method uses an adhesive tape having a width of about 60 mm outside the carton, and a bonding line of the carton interface portion as a center line. The adhesive bonding method uses an adhesive to bond the overlapping parts of the carton casing. Adhesives should have good adhesion and high adaptability to changes in temperature and humidity. They can quickly dry and solidify in a short period of time. Most of the adhesives used are polyvinyl acetate emulsions.
Among the three bonding methods of the carton box, the bonding strength of the adhesive bonding is the best, the bonding strength of the adhesive tape bonding is the second, and the bonding strength of the metal nailing is the lowest. In the selection of corrugated box jointing methods, reasonable selection shall be made according to the characteristics of the contents, the type of corrugated board and the corrugated box production volume.
Corrugated carton quality requirements
Corrugated carton paper printed with clear graphics, consistent color, bright and bright, correct printing position. The formed box is well-sealed and has no loopholes; the box lid is closed and there is no unevenness and the inner diameter of the separated box box is basically the same as the design size. The box lid is not easily cracked and fractured after repeated folding. In addition, corrugated cartons should be mated with specifications, with neat edges and no gussets; the surface of the box should be clean and free from visible damage and smudging.
Low-cost, short-lived version has become the mainstream of corrugated carton packaging and printing. Corrugated cartons will open up a new world for enterprises in the premise of environmental awareness and market demand, as well as the increasing value of corrugated paper boxes.
5. Carton area calculation