A brief analysis of China's packaging industry is

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A brief analysis of China's packaging industry is facing excellent development opportunities

China is a big packaging country, but not a powerful packaging country. China's packaging industry is facing excellent development opportunities. The rapid development of the consumer goods industry has brought about a rapid increase in the demand for paper packaging market, and the output of paper products has increased rapidly, accounting for the largest proportion. However, the rapid acceleration in volume has also brought a series of problems

the quality of paper packaging is mixed, and the environmental protection problems of glue used in cartons and gift boxes are inevitable problems in development. The packaging industry should make an issue of green environmental protection to realize the sustainable development of the packaging industry

characteristics of several printing methods

in recent years, domestic and foreign brand products and export products have put forward higher and higher printing requirements for packaging cartons and cartons

on the one hand, carton transportation and packaging are gradually developing towards commodity packaging. The printed text and patterns of packaging cartons are required to be clear. Two colors are gradually developed to three colors and six colors, and the color registration is required to be accurate. The point is developed from the current 60 lines to 80 lines. At the same time, the requirements for the accuracy of packaging and printing machinery are quite high, and flexible packaging and printing should be developed

on the other hand, packaging white paperboard will gradually replace gray paperboard, develop white background color printing, and replace oily ink with water-based ink, so as to make the surface of the packaging box beautiful, clear and bright, with high content of printing technology, so as to improve the added value of goods and meet the requirements of environmental protection

printing technology is inevitably used in gift box packaging, color boxes and kraft cartons that are common in the market

there are four major printing methods in China: lithography, hole printing, relief printing and gravure printing. Offset printing is a kind of lithography, silk printing is a kind of hole printing, and flexible printing is a kind of relief printing

offset printing: the printed pictures and texts are first printed on the intermediate carrier (blanket cylinder) and then transferred to the substrate for indirect printing. This printing method can make up for the unevenness of the substrate and make the ink transfer fully

lithography is the most widely used printing method at present. Its advantages are fast printing and low cost. The disadvantage is that the balance between ink and water causes color difference, moisture causes paper shrinkage, resulting in inaccurate final overprint

silk printing: during printing, the ink is transferred to the substrate through the holes in the image and text part through the extrusion of the scraper, forming the same image and text as the original. Modern silk printing uses photosensitive materials to make silk screen plates by photographing (making the silk holes in the image and text part of the silk screen plate be through holes, while the silk holes in the non image and text part are blocked)

the equipment of silk printing is simple and easy to operate. This printing method can be used for printing on various materials or concave and convex surfaces. The printing speed is slow, the production capacity is low, and the ink needs to be dried

flexographic printing is a printing method that uses a flexograph to transfer ink through a corrugated roller. Flexographic printing is a mirror image printing plate made of polyester material to produce a protruding required image, just like everyone's seal. During the rotation of the printing surface, the volunteer service team will take this as the focus to contact the printing materials in various farmers' markets, so as to transfer printing. Because it has a low microwave dielectric constant to the text, it is a very promising process in letterpress printing. Advantages of flexographic printing: movable type plate can be printed without plate making, only by checking and typesetting the text, with clear and neat lines, strong brush resistance and easy revision; Thick ink, bright colors, clear and powerful fonts and lines. The disadvantage of flexographic printing is the high cost of color printing

gravure printing is abbreviated as gravure printing. Gravure printing is a direct printing method, which directly imprints the ink contained in the gravure pit on the substrate. The thickness of the printed image is determined by the size and depth of the pit. If the pit is deep, it contains more ink, and the ink layer left on the substrate after imprinting is thicker; On the contrary, if the pit is shallow, the amount of ink contained is less, and the ink layer left on the substrate after imprinting is thinner

The printing plate of intaglio printing is composed of pits corresponding to the original text and the surface of the printing plate. During printing, the ink is filled into the pit, and the ink on the surface of the printing plate is scraped off with an ink scraper. The printing plate is in contact with the substrate under certain pressure, and the ink in the pit is transferred to the substrate to complete printing

gravure printing has the advantages of deep ink, strong color expression, suitable for a variety of materials, difficult plate making, and high anti-counterfeiting. The disadvantage is the high cost of printing plate and roller, which is only suitable for large-scale printing

using glue needs environmental protection

an important environmental protection problem of paper packaging is using glue. How to make a cardboard into a gift box, the indispensable is to use glue. Whether the glue is good or bad and whether it is environmentally friendly is often not valued by everyone. Everyone's attention is mostly focused on whether the gift box is beautifully printed, how the paper is, whether it is solid or not, and whether it is atmospheric. The real environmental protection issues involved have been ignored

the mainstream trend of development is functionalization, environmental protection and simplification

the author once visited the production workshops of several packaging manufacturers. When entering the papering workshop, the smell was simply unbearable, but the production workers inside could change the color without being affected by the load change, brush the glue onto boxes with a brush, assemble them, and pack them immediately after loading

the manufacturer itself has no awareness of environmental protection. The production workers work in such a production workshop with an unpleasant smell of glue every day. The boxes produced are immediately boxed and sent to the user, loaded with products, and sent to the consumers

if the product in the box is food, the glue smell that has not been dispersed in the box will rush into it, which is naked pollution. Therefore, the environmental protection of glue is very important

at present, China has no regulations on the use of glue for edible packaging materials, as well as the corresponding national standards. There are many kinds of glue on the market, including yellow glue, white glue, and the so-called water-based glue and jelly glue

there are various names of glue. If you ask the packaging manufacturer for the inspection report of glue, they can also provide the so-called third-party inspection report. The content of all harmful ingredients is also within the safe range, which is also environmentally friendly. But if you look closely, the third party is not an authority, but a company

in that case, the authenticity of the inspection report remains to be discussed. China needs to organize institutions to be responsible for the use of glue in food packaging as soon as possible, issue relevant regulations and standards, and standardize the glue market. Not only to ensure food safety, food packaging should also be safe

inventory of commonly used packaging paper

next, we will introduce several commonly used packaging paper: corrugated paper, white paper, white cardboard, glass cardboard, kraft paper, coated paper

corrugated paper

corrugated paper is the paper with concave convex corrugated shape heated and pressed by the corrugated machine. According to the size of corrugated concave and convex, it can be called fine corrugated and coarse corrugated

generally, those with a concave convex depth of 3 mm are fine corrugated, which are often directly used in glassware as shock proof barrier paper

rough corrugated with a concave convex depth of about 5 mm. Stick straw paper or kraft paper on both sides of this kind of corrugated paper to become a corrugated box. According to the quality needs, it can also be made into double-layer corrugated (one layer of straw paper in the two-layer corrugated, kraft paper or straw paper in the upper and lower layers). The corrugated paper is very strong, but light, can bear load and pressure, and can also be shock proof and moisture-proof, which is more convenient for transportation. Corrugated paper has a wide range of uses, and can be used as transportation packaging and inner packaging

white board paper

white board paper has two kinds of gray bottom and white bottom. The texture is solid and thick, the paper surface is smooth and white, and has good stiffness strength, surface strength, folding resistance and printing adaptability. It is suitable for making folding boxes, hardware packaging and sanitary ware boxes. Whiteboard paper can also be used to make tags, lining plates and plastic packaging bottom brackets. Because of its low price, it is the most widely used

paper jam

white paper jam and glass paper jam. White card paper is firm, white and smooth. The paper surface of the glass card is glossy. Cardboard is expensive, so it is generally used for packaging wine boxes, gift boxes, cosmetic boxes, tags and other high-end products

kraft paper

the gray color of kraft paper itself gives people a simple feeling, which may not be impressive, but it is very environmental friendly. The export of Fen Wine is basically kraft paper boxes, and it is cheap and economical

coated paper

is divided into single-sided and double-sided. Coated paper is mainly refined from high-grade raw materials such as wood and cotton fibers. Every square meter is about 100g to 300g, and more than 250g is called copperplate white card

the paper surface is coated with a layer of white pigment, adhesive and various auxiliary additives. After super calendering, the paper surface is white, with high smoothness, high adhesion and strong water resistance. After printing, the ink can reveal a bright white background, which is suitable for multicolor overprint printing. After printing, the color is bright, the level changes are rich, and the graphics are clear

among the four major packaging materials of paper, plastic, metal and glass, paper packaging materials are the cheapest, recyclable and reusable. The source of articles is Huaxia wine, which is conducive to environmental protection, so it develops the fastest. According to experts' prediction, the development direction of paper packaging is that packaging paper, paperboard and carton board tend to be high-quality and lightweight. It is conceivable that paper packaging materials will play an important role, and both paper and paperboard will be a leading packaging material, no matter now or in the tension, contraction, twists and turns and experiments of various metal materials. In short, the mainstream trend of paper packaging materials in the future is functionalization, environmental protection and simplification

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