3.UV screen printing
The solid content of UV screen printing ink is 100%, there is no component volatilization, the ink film thickness after curing is basically the same, which is conducive to obtain a higher film thickness, printing and curing process is easy to control, can avoid blocking, spots, etc. Faults, reduce downtime. Although the UV screen has many advantages, the determination of the photoinitiation conditions affects the curing quality of the ink layer, and the improper selection can only cure the ink film surface faster. On the other hand, UV screens have the advantage that the ink film is thick, but the lower pigment content can achieve a high hiding power, which is a favorable condition for the curing of the underlayer. Under the premise of not impeding the saturation and hiding power of the pigment, the light-transmitting filler with better refractive index is appropriately added to increase the concentration of the light-transmitting medium in the ink layer, which also helps to increase the light-absorbing amount of the underlayer initiator. Due to the thick screen printing ink film, the printing accuracy is not very high, and the pigment particle size can be larger. Therefore, under the premise of not sacrificing the dispersibility of the pigment, the pigment particle diameter can be appropriately increased, so that the actual light transmittance of the ink can be increased to facilitate the The bottom layer cures.
UV printing problems
Compared with traditional ink printing, UV printing does have a great advantage, but popular applications still face some problems that must be solved and improved.
1. Price
Although UV inks have the advantages of instant curing and good conjunctival performance, they are relatively expensive, and special UV blankets and UV ink rollers must also be used, which greatly increases product costs.
2. Adhesion
In the curing of UV inks, the internal components are cross-linked and aggregated, and the volume changes instantaneously to generate greater internal stress, which affects the adhesion of the ink to the substrate. Although the problem can be solved by treating or modifying the surface of the substrate, the fundamental solution is to seek and develop UV inks with good adsorptivity, low shrinkage stress, and low cost.
3. The appropriate fountain solution
UV inks are mainly used for non-absorbent printing materials, and for different printing materials, ink preparation is not the same. Therefore it is required that the fountain solution has a wider adaptability in order to ensure that the required print quality is achieved. Although UV printing has the above problems, with the maturity of related technologies and the expansion of application fields, its rapid development is inevitable. In the near future, UV printing will surely gain wider application and popularity.
4, low technical difficulty, less equipment investment.
As "enhanced sandwich corrugated board" is a cardboard produced from ordinary corrugated board, its main material is ordinary corrugated board, so it is very suitable for the production of corrugated packaging companies.
Process, process and equipment
1, the process
(1) The corrugated board production line produces corrugated board with top layer, back layer and interlayer according to the required specifications.
(2) Sandwich corrugated paperboard (three-layer, B-twist, base paper quantitative 100-115g/m2 ordinary corrugated paper), in a specialized cutting machine at a certain interval distance, the positive and negative vertical corrugation direction cut (cut off the second floor, only Leave a connection).
(3) Corrugated cardboard after cutting is combined with the inner layer on a special gluing machine (equivalent to single-faced corrugation).
(4) Trimming the blended cardboard on the slitter and slitting according to the required specifications (if it is only for cardboard, this process should be carried out after the surface layer is glued).
(5) On the ordinary gluing machine, stick with the surface layer corrugated cardboard. If the surface layer is used as the outer layer of the packing box (generally five layers of corrugated cardboard), it can be printed, die cut or grooved in the same way as ordinary corrugated boxes.
2, process flow
3, the required equipment
(1) Five-layer corrugated cardboard production line;
(2) Specialized cutting machine;
(3) Dedicated molding gluing machine;
(4) printing machine, slotting machine;
(5) Die-cutting machine;
(6) Ordinary stickers machine;
(7) Slitter.
Cost statistics
1. Material (three-layer corrugated cardboard)
(1) Surface and in-line three-layer corrugated cardboard (C or B enamel, 175g nubuck cardboard, lining paper 180g noodle, corrugated cardboard 127g corrugated paper) 1.65 yuan / single m2 × 2 = 3.58 yuan / double m2
(2) corrugated sandwich layer, surface, in, corrugated paper are 127g corrugated paper, 1.28 yuan × 1.6 = 2.05 yuan / m2
2, processing fees (cutting, forming, blending, slitting)
(1) Auxiliary material: 0.54 yuan/m2
(2) Utilities: 0.05 yuan/m2
(3) Management fee: 0.25 yuan/m2
(4) Profit: 0.80 yuan/m2
(5) Tax: 0.22 yuan/m2
(6) Others: 0.27 yuan/m2
Total: 8 yuan/m2 (production company sales price)
To sum up, "Strengthened Corrugated Corrugated Cardboard" has fully utilized the mechanics of multi-directional support due to its structure. High-strength corrugated paperboard has been deformed by a unique process and integrated with the best mechanical structure, resulting in such high strength. The six sides of the box made of corrugated cardboard form a strong tubular matrix, which can resist the pressure and collision from all six sides in an all-round way, and can effectively prevent the damage of the articles in the box, especially the large volume of the packaging. Products and fragile products can show its advantages.
As "enhanced sandwich corrugated board" is a full-paper packaging product, it has the advantages of light weight, high strength, good cushioning performance, etc. It can effectively replace the foamed plastic as the liner and support block of product packaging, preventing external force from packaging The oppression and collision of the goods avoid the problems of package collapse, environmental protection and epidemics. Because "enhanced sandwich corrugated board" makes full use of the principle of mechanical structure, under the same strength requirements, it will save more materials than traditional corrugated cardboard and honeycomb board, so the production cost will be lower. It can be said that "enhanced sandwich corrugated board" and its various types of paper product packaging boxes used to make it are a project that benefits the country and the people.
Source: Ke Yin Media
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