Developed examples of wood packaging in developed countries
As early as the 1950s, the United States had a modular heavy-duty carton and used an octagonal clamp pad and a generous head self-tightening screw to secure the bottom of the box and the seat (pallet).
In the mid-1980s, wood-based heavy-duty packaging in developed countries included high-strength multi-story (double-arch) corrugated cartons, non-wood pallets, and side, corner, bottom, and top reinforced structural materials, and used as septum, liner, and padding. The application of non-ligninized materials, such as buffering, positioning, and protection (combination filling), has entered the stage of commercialization, and both technology and equipment have a high level. For example, the packaging box introduced in Japan at that time could be packaged with specialties, heavy flat products, castings, and electromechanical products. As for the ultra-significant wood packaging, the composite or composite structure of super-multilayer corrugated cardboard is adopted.
High-strength multilayer corrugated cardboard box
Small and medium sized wood cartons, generally with three or seven layers of corrugated cardboard, can be made into heavy-duty crates through automatic production lines, and fixedly connected with wooden pallets at the bottom of the box (In recent years, paper trays and non-all-wood composite pallets have gradually been used) . Rexam of the United States uses two three-layer seven-layer corrugated paperboards to glue together to form and form a 14-story, overweight corrugated cardboard box that can withstand large Ford trucks with a load-bearing capacity of 7.5 tons or more. In the heavy-duty packaging cartons, there are also large carton bodies made in the shape of octagonal prisms, and the bottoms and lids made in octagonal trays are glued to form heavy-duty packaging containers after the packaging operation is completed. This prevents the multi-layer super-thick cardboard from breaking when the press line is folded into a box to form a right angle. Japan's large container-packed plastic granular material has a volume of 3.45 tons (the size of the box is 2.5 meters in diameter and 2.3 meters in height).
In addition, the ultra-rigid high-strength multi-layer corrugated cardboard with corrugated vertical cross-staggered adhesive overcomes the difference in the direction of the comprehensive strength index and has the advantage of complementary strength. It can be used as a heavy-duty crates and tray bottoms, which can be used in imported goods and Delivery machines and product containers are seen on trays and pallets.
Honeycomb paperboard application
It is used as a liner and a partition in heavy-duty containers, in conjunction with the inner wall of the box, for the reinforcement of wall materials, and for the production of full-paper trays. The United States has a waterproof paperboard full-paper tray and used as a box corner, box bottom cushioning performance of the production of protective packaging materials and services.
In foreign countries, it is rare to make cardboard cartons from honeycomb paperboard. Israel uses a honeycomb cardboard with a thickness of 8 mm to 10 mm to make packing boxes for cigarettes, jade and porcelain. The box forming equipment and process are similar to those of corrugated boxes. The processing of thick honeycomb paperboard into boxes is less convenient. Like the production of honeycomb paperboard, some links are not easy to connect into automatic lines, and high speed production is not possible. This is inconvenient for the “profit-making†carton industry to rely on mass production to achieve large-scale production efficiency.
In spite of this, the speed, performance, and product quality of foreign honeycomb paperboard production lines are still higher than that of domestically-made equipment, and thus the selling price is high.
Generation wood pallet application
On behalf of the wood trays are honeycomb cardboard trays, pulp molded trays, paper trays filled with fillers. Plastic trays, metal trays, etc. Together with the packaging box, they are used as a whole for transport packaging, participate in high-quality circulation process, and have been developed abroad for more than 20 years.
Development of paper-based wood packaging in China
As early as December 1998, dozens of countries including the United States, Britain, Canada, and the European Union imposed quarantine standards for the packaging of wooden packaging for export goods in China, requiring that all wooden packaging in China be fumigated, insecticided, or Heat treatment, but also with bark, wormholes, moisture content of less than 2%. (Implementation of the IPPC label from July 1, 2006) was essentially a "trade barrier" or "technical barrier" set up for China's export trade, adding a lot of obstacles and inconvenience to China's export trade. With the improvement of people’s awareness of environmental protection, the environmental protection of electronic information products packaging has also received more attention.
To make a simple estimate: In 2001, China's annual usage of pallets, such as 50% of corrugated cardboard instead of wood, would save 90% of the wood, and 2/3 of the funds alone would save 15 billion yuan. Moreover, the corrugated composite board can be recycled and recycled, which is of obvious significance to environmental protection of forest resources and maintenance of ecological balance. Replacing wood packaging with corrugated cardboard packaging can save a lot of wood resources. Each ton of recycled corrugated composite board can replace 30 to 50 cubic meters of wood. Only one mechanical and electrical product packaging, if it can replace 1/3 each year, it can save 1.1 million cubic meters, more than 3 million cubic meters of logs, and can be a large number of recycled waste paper, recycling of discarded packaging recycling. If according to experts' estimates, the annual production of corrugated composite board of several hundred million square meters can save hundreds of cubic meters of wood and create a production value of several billion yuan. With the reduction of packaging costs, the promotion of product exports, the social benefits are incalculable. of.
The honeycomb paper tray researched and developed in 1998 was welcomed and applied by a large number of exporters and solved the problem that the wooden packaging materials were exported to the United States and the European Union. At present, honeycomb paper trays are continuously expanding their market share and become a major substitute for wood pallets; the honeycomb paperboard air-conditioner packaging program developed in 2000 was favored by Haier, Gree, Midea, Kelon, Changhong and other home appliance giants and has basically replaced them. Traditional EPS foam or wood packaging solutions; Subsequently, Changhong rear-projection TV, LCD TV, Haier refrigerator, Midea dishwasher, electric fans and other household electrical appliances are successively applied to honeycomb cardboard packaging. The development and application of honeycomb paperboard packaging materials are forming the original Potential. Therefore, honeycomb paperboard as a new type of packaging material has a good development and application prospects.
In recent years, China has also solved the technical difficulties of the production process of 3A heavy-duty corrugated board that is difficult, costly, and difficult to bond. Tested and tested by the testing laboratory of China Packaging Scientific Research and Testing Center, 3A special heavy-duty corrugated cardboard has good surface quality and firm bonding, and its puncture strength and side pressure strength are excellent. It has the features of high strength, beautiful appearance, good moisture resistance, easy recycling, degradable and non-polluting, which is beneficial to the ecological environment and meets the national standards.
Today's heavy-duty corrugated users, household appliances, medical equipment, electrical equipment, compressors, motors, power distribution cabinets, jacuzzis, motorcycles and other large-sized, large-sized goods require high strength in the carton packaging. The industry's general awareness of heavy-duty corrugated cartons is that they are seven-layer corrugated cartons for heavy-duty packaging. The industry believes that heavy-duty corrugated cartons can be used as long as they are heavy-weight and replace wooden box-type packaging. Like composite board, its structure is different from common seven-layer board, and its production process is not the same. Unlike traditional cartons, it uses staples to nail boxes.
In addition, compared with the traditional wooden crates, the corrugated honeycomb composite crates have obvious advantages: the buffering performance is 2 to 8 times higher than that of wooden boxes; the price is 10% to 15% lower than that of wooden boxes; The box is light 55% to 65%; the appearance is better than the wooden box, and the scope of use is wide. The annual production of 10 million motorcycles is an example (0.116 cubic meters for each timber box), and a honeycomb composite box saves 10.3 million cubic meters of wood annually.
In the civilian sector, honeycomb cores are generally made from 100% recycled paper. High-strength honeycomb paperboard can also replace EPS white foam or wood packaging materials for home appliances, electromechanical and various industrial products packaging. Structurally, any solid sheet can be replaced with a honeycomb structural sheet. For example, in the furniture manufacturing and packaging industry, a 1000-kilogram honeycomb core can replace 30 to 50 cubic meters of solid wood panels, or 40 to 60 cubic meters of EPS white foam. Obviously, honeycomb material is a lightweight material with low material consumption and low energy consumption. It not only can save a lot of natural resources such as wood, but also can greatly reduce the amount of white foam that pollutes the environment. It is an indispensable resource conservation. Type and environmentally friendly materials that can be completely recycled.
China's success story with paper and wood in packaging and transportation
Topless cardboard tray
According to the requirements of domestic and export fruit and vegetable producers and consumers, the type and effect of packaging boxes still need to be improved. In response to this demand, close cooperation between corrugated board manufacturers and machine builders has produced topless cardboard pallets. Due to its high strength and good air permeability, this cardboard tray can make the product better when it reaches the destination. The wide variety of existing topless cardboard pallets, which are mostly patented by cardboard manufacturers, require the necessary machinery for the development and production of this new type of cardboard pallet. Along with the introduction of the topless cardboard tray, its bottom size is also standardized to four types: 60X40, 50X40, 40X30 and 30X20. All of these dimensions are for easy handling with the 120X100 or 120X80 standard carrier and more efficient use of handling tools and storage space. This standardization requires that a machine for producing cardboard pallets can produce cardboard pallets of various standard sizes.
The topless cardboard pallets are now most widely accepted and used by the fruit and vegetable industry in Europe and abroad. After the fruits and vegetables are packaged in the grower's packaging workshop, they can be delivered to the supermarket and moved to the shelves in good condition. It is welcomed by both producers and consumers and is not only easy to handle, but also better able to display products.
Corrugated cardboard tray
The new pallets made of standard structural corrugated board, like the garment design, can meet the user's special requirements for size, weight and shipping conditions. It includes cross-web spacing, top-bottom thickness variation, and coating application. At present, due to environmental reasons, international transportation requirements do not use wooden pallets as much as possible, so the demand for corrugated cardboard pallets has grown rapidly and favored. The use of corrugated paperboard trays can reduce transportation costs. A standard wooden pallet weighs about 27 kilograms, while a paper pallet weighs only about 4.7 kilograms. This means that each truck can hold 850 kilograms of cargo and it is easy to carry. In addition, the paperboard tray has no splinters of trees, no fixed nails and rough corners, and no toxic chemicals left on the oak trays when fumigated. Therefore, it does not pollute the environment and harm the human body, and it can be completely recycled. Convenience. Like all three-layer corrugated cardboard, pallets are made of A-type corrugations and have a good ratio of strength and weight. Three-layer corrugated cardboard trays have the same general strength as wooden trays, and weigh only 20% of the trays. The structure of corrugated paperboard tray is composed of three pieces of longitudinally-stringed A or C-type five-layer and seven-layer corrugated cardboard with standard strength. The direction of pressure is the same as that of the corrugated cardboard side-pressure test during the experiment. That is, the length of the corrugated paperboard is basically the same as the length of the tray, the width and the height of the * hole of the tray are approximately equal, and the width of the longitudinal beam is equal to the total thickness of the corrugated paperboard combined together, and then the ordinary outside three-layer corrugated cardboard will be combined together. Corrugated cardboard is wrapped to increase its overall strength. The upper and lower decks are also made of ordinary three-layer corrugated cardboard and stapled together with stringers.
Application example of full-paper high-strength "Wazhongwa"
Reinforced sandwich corrugated board, referred to as "Wazhongwa", is made of this cardboard made of shockproof and pressure-resisting packing cartons, and is used to reinforce the structure of combination packaging containers and buckle-type, bolt-type connection devices. Break through the limitations of traditional corrugated packaging and honeycomb paperboard technology, from the appearance to the intrinsic quality to promote the technological leap of packaging products, and provide a broad space for development and profitability for packaging companies and manufacturing businesses. Its comprehensive advantages are as follows:
Change the wood product packaging, high cost, waste, not easy to recycle, and poor shockproof, heavy, difficult processing and other defects, easier to quarantine than wood product packaging, safety is good. To solve the fragile, afraid of pressure, bulky or expensive items using foam plastic shock pressure caused by a large number of white pollution, is a pure green packaging.祛 In addition to traditional corrugated packaging paper products, the strength is not high, the pressure resistance, breakage resistance is inferior to wood, and shock, pressure resistance is weaker than foam plastic. By changing the fatal defects of the traditional "honeycomb paperboard" with shrinking tides and unpredictable gravity, it is possible to basically avoid the pressure loss caused by shrinkage and shrinkage of the packing box during storage and transportation in wet climates, and to become a brand-new solution for large and heavy household appliances. The program is a packaging revolution that replaces wood and replaces foam technology. The wide application of corrugated board and its products is one of the important ways to realize paper-based wood replacement.
Network structure of corrugated cardboard
The network structure of corrugated cardboard, the inner layer is formed by the tile thought method paperboard, the adjacent corrugated paper is the length direction of each other is perpendicular to each other or at an angle, in the intersection of the enthalpy and the enthalpy are bonded to each other Point network, according to the need to determine the number of layers, the surface covered cardboard, you can get the network structure of corrugated cardboard and its products. Such as various types of cabinets, septa and other cardboard products. The network structure of corrugated cardboard is due to the fact that corrugated paper is placed perpendicularly or at an angle to each other, and the network is bonded to the structure. Therefore, the ability to withstand all directions is improved, as corrugated paper replaces the original core paper layer. Reduced weight. The network structure of corrugated paperboard is to change the structure of the original corrugated paperboard, make full use of corrugated paper in the long direction of the ability to withstand the superior characteristics, increase the thickness of the paperboard, improve the anti-jamming, pressure resistance, anti-cyclical pressure and the pressure in all directions The ability and impact resistance, and increase the weak. The products made of the cardboard, such as the counterparts of the carton, etc., can also improve the overall capacity of the corrugated cardboard and products, and ensure the use of performance. With 5 layers of paperboard, 296 grams per square meter can be saved, and the quality is reduced by about 13%. . This not only saves raw materials and reduces costs, but also reduces shipping costs, and reduces the labor intensity of the porters. At the same time, domestic cardboard can be used instead of imported cardboard to save part of foreign exchange and reduce the cost.
Heavy-duty corrugated cardboard that can replace wooden packaging
The strength of heavy-duty corrugated cardboard has far exceeded the scope of general corrugated cardboard packaging. A 1300-gram empty carton with a length and width of about one meter and a height of 0.5 meters can withstand the test of a car weighing nearly 2 tons and the high-temperature and wet weather. It can be collapsed all day and its strength can be imagined. 1300 grams of seven-layer and 8520 grams of five-layer heavy-duty corrugated cardboard, in line with the United States federal standards PPP-B-640d, railway standards Rule41, truck standards Rule222 and the relevant government standards in 42 countries in the world. The use of this product and the use of other packaging materials compared to wood packaging has the following advantages: reduce packaging costs; easy to recycle, protect the environment; simple assembly; safe operation, reduced working time; light weight, can save freight; High stacking storage; Sealable packaging; Suitable for many national standards; Strong moisture resistance; Recycling mark; No fumigation; Can be printed on the surface of the box; Can be made into extra-large size packaging; Stacked; acceptable for small orders. After using heavy-duty corrugated paperboard for many wood packaging products, the overall logistics cost has dropped by an average of 10% to 40%, and the protective performance of the product has been enhanced, thus providing a strong guarantee for the realization of customer product value. .
Heavy-duty communications products with paper substitute wood case
Base stations, switches and cabinets are important members of the telecommunications product family. As the environmental protection trend becomes more intense, the shortcomings of base stations that originally used wooden packaging are increasingly exposed. To control pests and diseases, each wooden package is not only to be exported. Fumigation and disinfection, even in some areas with high forest coverage in China, have disinfection requirements. These disinfection measures lead to high transportation costs for communication companies, and are time-consuming and laborious. Moreover, the appearance of wooden packaging is not as delicate and aesthetic as carton boxes. Therefore, it is imperative to seek new product and new technologies that are suitable for heavy-duty product packaging. Domestic communication companies are now using a lock-type wooden packaging, which is easy to disassemble and has a certain display effect. In addition, communication companies have some products with small volume and weight, and their weight is heavy. Their self-weight is more than a few hundred kilograms, and the requirements for packaging are relatively high. If wooden boxes are used as packaging materials for small products, not only will they have trouble during transportation, but they will also consume a lot of wood, which is not conducive to environmental protection. These companies have already represented "Wazhongwa" and "3A" corrugated cardboard as heavy-duty packaging. There are many domestic companies that currently require heavy-duty packaging. The amount of packaging required each year is considerable. Only one enterprise's annual packaging purchase amounted to 30 million yuan. However, the domestic carton enterprises have to stop at the limit of production technology and rarely involve heavy-duty. Packaging area.
Seven-layer corrugated paperboard is generally used for heavy-duty or extra large-scale packaging. The common combination schemes are A+A+A, B+A+B, and C+A+C, which can ensure a certain total thickness and load-bearing capacity. The inner and outer linings have high flat compressive strength, puncture strength, and slope resistance.
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