In recent years, as people's material and cultural living standards have continuously improved, people are increasingly demanding the packaging of goods. The circulation of high-quality packaging products is increasing, the added value plays a significant role, and the number of colored cartons is increasing rapidly in the circulation of products. Exquisitely printed, rich image layers, durable and practical paper and plastic packaging are increasingly used in food, melons, fruits, cosmetics, and other industries.
With the continuous development of complete sets of equipment for gravure printing and packaging, the products of ink, paper and compound glue are constantly updated. A new process of paper-plastic composite packaging with extremely low cost and high quality is quietly emerging in the country. The practical experience of the Beijing Institute of Printing Machinery in this area and the Beijing Huasheng Printing Factory in recent years is briefly described below.
The traditional high-end carton printing and box making process generally adopts the unit type multi-color flexo printing or multi-color (times) offset printing. Its characteristics are: printing (including paper, ink, etc.), high cost, high equipment depreciation, so that the entire cost of printing products is high; the printing format is relatively small, the printing quality is higher, the number of printing color is generally 4 colors, can carry out level printing, Adapt to small batches or parts products. At the same time, the printing surface needs to be coated or polished after the process for the packaging of high-end products.
The process is: printing - coating (or polishing) - die cutting - box (box)
Gravure Printing Paper-plastic Composite Process Introduction 1. Plastic Printing A plastic gravure printing press is used for multi-color (up to 12 colors or more) printing (inside printing), and full-color white printing is performed in the last color.
2. The water-based paper-plastic composite is printed with a printed color graphic plastic film and grey paper (or tea board paper), and the composite paper roll is formed into a product similar to that after the offset printing.
3. Directional cutting (can also be manually cut) The composite web is cut to a single sheet according to the size of the text.
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5. Die-cutting. Finally die-cutting the finished product.
The advantages of gravure printing paper-plastic composite technology (1) The cost of equipment configuration is low (compared with the same level of flexographic offset printing, and the same applies to the overlaying and die-cutting process). The printing format is 1100mm×1000mm, and the output is 60,000 square meters per day as an example.
1. The total price of gravure paper-plastic composite processing equipment (1 million -1.35 million yuan)
Six-color gravure printing machine: 480-800,000 yuan, water-based compound machine: 150,000 yuan, cross cutting machine 2 sets: 400,000 yuan 2. The total price of flexographic printing equipment (3.65 million yuan)
Four-color flexo printing machine: 3.5 million yuan, compound machine: 15 million yuan 3. Offset printing process equipment total price (4150000 yuan)
Four-color off-press: 4 million yuan, multi-functional: 150,000 yuan (b) Printing adaptability, the cost of the process.
1. Printed material (printed paper)
The gravure printing machine can not basically meet the requirements for paper because it is printed on the plastic film (BOPP). At the same time, it can carry out the full-color white printing of the background, it can not use the white paper, the price of paper is very different; the flexographic and offset printing is directly Printing on paper requires strict quality requirements such as the thickness and whiteness of the paper, and the price of the paper is also high.
2. Platemaking costs Gravure printing plate making costs are relatively high, but for larger batches of printed matter, the plate making cost becomes insignificant, and the gravure can be saved for repeated use, and the durability is high.
3. Printed format gravure printing does not require any size requirement for a certain range of the printed web. Due to continuous printing, pattern overprinting can be performed, which can save printed materials. At the same time, its printing format is much larger than flexographic and offset printing.
4. The requirement of compounding is due to the full version of gravure printing. When the plastic film and the paperboard have air holes and peeling, it does not affect the appearance of the appearance. At the same time, the use of water-based plastic paper-plastic composite is conducive to environmental protection, and the glue is cheap.
Comparing the finished product price with printing materials, ink, edge waste, production efficiency, equipment depreciation, and other multiple costs, the cost of finished high-grade color packaging products in gravure printing is about 25-35% lower than that of flexible offset printing.
In short, this process and the equipment used began to research and explore several years ago and continued cooperation and practice with some printing companies, and has become a mature technology that can be promoted so far. Due to its unique color printing group and thick ink layer And full version printing is easy, in the product packaging, its exquisite printing, wide format, low cost and adaptability are generally welcomed, which will also bring a new opportunity and technology revolution for high-end packaging printing companies.