The most popular waste plastics, waste wood fiber

2022-08-02
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Production technology of waste plastics, waste wood fiber composites and wood plastic pallets

due to the discovery of longicorn beetles in the wooden packaging of China's export goods, the governments of the United States and Canada decided to treat the wooden packaging and wooden bedding materials of Chinese goods that left the port on December 17, 1998 and January 4, 1999 respectively, otherwise the goods would be prohibited from entering the country. The United Kingdom also announced the new quarantine standards for all wooden packages of goods from China from 1 February 1999. The EU is also prepared to take such measures to prevent the entry of longicorn beetles. The implementation of new technical standards and measures is a means for developed countries to implement trade protection. With the restriction of WTO on tariff barriers, it is not new for developed countries to implement trade protection policies on their own products by using technical standards and technical measures. The insiders in China believe that the developed countries have implemented new quarantine standards for the use of wood packaging and wood bedding materials for China's export goods one after another, which should be paid attention to, and it is urgent to reform the packaging materials for China's export goods. According to the development trend of international popular packaging, accelerating the application and development of new packaging materials can not only reduce the cost of China's export goods, but also help protect China's limited natural resources

from an economic point of view, as the United States and Canada require fumigation treatment for wood packaging of China's export products, the impact on China's export products will reach 30billion US dollars. Moreover, the cost and time of fumigation treatment are considerable from the aspects of material inspection and operation. For each container fumigated, it takes at least 16 hours and about 300 yuan. Based on 5million containers of China's export products every year, the domestic cost will exceed 1.5 billion yuan and the processing time will be about 100million hours. In the United States or Canada, the cost is more than 2 times higher than that in China

from the protection of wood resources, the largest consumption of hardwood in North America is the production of pallets, accounting for 40% of the hardwood output, with an annual consumption of 24million cubic meters; At present, the output of wooden pallets in China has reached 50million and the wood consumption has reached 2.5 million cubic meters. As a timber tree can only be made into 6 pallets at most, and these 6 pallets will be scrapped for up to two years. At the same time, with the increase of plastic raw materials needed by the export plastic recycling granulator to regenerate the waste plastics from ordinary life, the development of wooden packaging boxes in China is very rapid, especially for the export of mechanical and electrical products, with a very large consumption. In addition, the catastrophic flood in China in 1998 caused huge economic losses, and one of the important reasons for the flood was the long-term and large-scale deforestation, resulting in soil erosion; On the other hand, experts predict that China's demand for wood will exceed 100million cubic meters from the heat sealing part to the year 2000, while the supply of wood will only be more than 60 million cubic meters at that time. Therefore, in order to protect the Limited wood resources, it is necessary to find suitable wood substitutes to produce pallets. Therefore, a new type of green environmental protection material - wood plastic composite material appears in the international and domestic market

this new material is made of waste plastics and waste wood, including sawdust, wood branches, bran shells, peanut shells, etc. in a certain proportion, added with special adhesives, processed at high temperature and high pressure to make structural profiles, and then assembled into pallets or packaging boxes. The application results show that it is a new material with good performance, cost-effective and environmental protection. This wood plastic composite material can not only replace the wood packaging materials and bedding materials for outward shipments, but also be used as a wood substitute in furniture, construction, industry, vehicles and ships, packaging and transportation and other fields

in addition, to solve the contradiction between supply and demand of wood in China, an important way out is to improve the utilization rate of wood. At present, the comprehensive utilization rate of wood in China is only 63%, which is far lower than that in developed countries. Because the raw materials of this material are mainly waste wood fibers and waste plastics, it can make high value-added wood substitutes from the waste materials that can not be processed by the maximum load mold when the sample is damaged in China with an economical and applicable process, which is also of great significance to the protection of forest resources and the reduction of environmental pollution in China. It can be predicted that with the implementation of the ban in the United States and Canada, the new material will be put into production in China as soon as possible, which will provide a comprehensive solution to the three major problems of wood packaging for outward transportation, wood shortage and "white pollution" in China

source: plastic wood

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