6, iron box: (except for large containers) punched by the metal sheet after punching into a four-sided type, by nailing, riveting and other methods to form the box. With wooden clogs as a bottom tray. For special products, industrial semi-finished products packaging. 
7, plastic folding box: (this box different assembled folding box) injection molding machine through the mold opening and closing injection into each panel (6 ~ 8 sets of molds, 6 ~ 8 injections), and then by the panel through the shaft, buckle Connected to each other into a box, can be folded into a flat shape. Since the injection-molded panels are easily deformed, the connection is not smooth, the size is single, the price is high, and the design is unreasonable, so the usage rate is not high.
8, plastic box: injection molding machine through the mold opening and closing injection molding a plastic. Due to the expensive and cumbersome mold, the size is limited. The main products are two kinds of straight squares and ladders. Most of them are medium and small boxes with a large volume of about 0.1-0.2m3. Mainly used for packaging turnover of industrial products, semi-finished products, agricultural products and aquatic products. China's postal service uses the OTTO card to cover the turnover box and the box is rectangular. Straight rectangular boxes are transported and stacked, but the circulation is difficult (large space is taken up for recycling). The rectangular boxes on the contrary are opposite. The transportation and stacking properties are poor (the bottom is directly pressed onto the lid or the goods). The recycling is more convenient and can be overlapped. Trapezoidal, occupying less space, both have pros and cons. 
In summary, China's corrugated carton boxes and E-hole cartons are extremely versatile and have a huge amount of use. In 2001, China's cartons used more than 10 million tons of paper, which accounted for 1/3 of the amount of paper used by various industries in the country. However, the use rate of cartons was one-off. At the same time, the use of plastic packaging in China has reached 3.5 million tons, which is the fastest and fastest growing variety of packaging materials. The main products are almost all light and plastic films, plastic bags, rubber bottles, foam lunch boxes, etc., and they are also used once. This phenomenon is not optimistic! Although the use of cartons is extremely simple and convenient, secondary water contamination is likely to occur when recycling recycled paper. In order to reduce and prevent water pollution during papermaking, the state has closed all small and medium paper mills below 5000T in the Huaihe River Basin, Haihe River Basin and Liaohe River Basin.
Since May 2002, supermarkets and shopping malls in Taipei, Taiwan, have deactivated film bags. The reason is that the recovery is difficult, it is easy to cause pollution of vision, soil and water resources, and it is not biodegradable. To this end, many experts and scholars have questioned: If we do not use paper bags for plastic bags, will we not consume more green resources? To solve the problem of water pollution caused by secondary papermaking, in order not to allow plastic bags, the phenomenon of foaming lunch boxes will continue. The following choices should be clearly made now: plastics are hard to eat (gradual use of assembled folding boxes, convenient recycling, repeated use, replacement of some cartons). Paper is soft (a lot of paper used in cartons is transferred to paper bags, lunch boxes, plastic bags, and foam boxes that are prohibited from use. The paper bags can be partially recycled, and paper and lunch boxes can be decomposed and returned to nature). At the same time, packaging must be implemented by whoever uses it and who is responsible for the recycling system. Especially industrial transport packaging (ie outer packagings). This is an inevitable requirement for the sustainable development of the packaging industry. It is also the only choice for humans to maintain nature. The Assembled Folding Packaging Project will be the first one to embark on this path of sustainable development that is full of challenges and unlimited business opportunities.
III. Existing conditions and prerequisites for project development
Several large petrochemical companies all over the world agree that with the rapid development of China's economy, China has become the world's largest petrochemical trade market. China's demand for petrochemical products has clearly exceeded the growth rate of China's GDP. At present, China's imported plastic raw materials account for 25% to 30% of the world's total plastic trade, reaching 230 to 2.4 million tons. It is precisely because there is such a huge demand. China's largest joint venture project, Nanhai Petrochemical (4.3 billion US dollars investment, 800,000 tons annual production capacity) was launched in Huizhou, Guangdong. In addition, Daqing Petrochemical, Shanghai Petrochemical, Maoming Petrochemical and other large companies have also invested heavily in large-scale expansion. This has provided a reliable raw material guarantee for the implementation and development of the project. At the same time, the downstream of these large enterprises will inevitably produce a huge production chain.
China's logistics industry is a new industry. The necessary software (information network platform), hardware (warehouses, shelves, transport containers), funds, and talents are all available. With China's accession to the WTO, China will become the world's manufacturing center. Last year, China’s container throughput was 26.53 million TEUs, and Hong Kong was the world’s largest throughput port. Large-scale steel structure containers have been produced and used for more than 40 years. Its speed, safety and convenience have been accepted by the world. So far no standard subsidiary products have been derived. Large plastic assembled folding boxes can fill this gap. Its use can improve loading and unloading, transportation efficiency, and protection of goods. At the same time can be recycled repeatedly used. It is also suitable for the loading of aviation, ships, trains, and automobiles. Because many countries in the world are based on pests, they strictly control wooden pallets and wooden pallets for import and export. Domestic wooden box and wooden pallet products are seeking alternative materials and products, and the large assembly box floor can meet this demand. Some packaging experts pointed out that with the introduction of certain policies and regulations in one region and one country, with the appearance of certain new materials, new processes, and new products, new packaging companies will be born at any time. (To be continued)

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