Recently, the Minderoo Foundation released the Plastic Waste Maker Index (PWMI) 2023, and according to the report, it is estimated that 402 million tons of polymers will be made into plastics in 2021, of which 139 million tons will be single-use plastics - i.e., single-use plastics account for more than one-third of the world's annual plastics production.
Plastic pollution is a global problem. The key to strengthening the fight against plastic pollution is to find suitable alternatives. For some time now, from small disposable beverage straws to large drainage pipes, pulp-molded plastic products are becoming an environmentally friendly alternative to plastic products in many fields such as packaging, construction, transportation and chemicals.
In the extensive implementation of the new situation of plastic ban, pulp Molded products due to its excellent environmental protection and degradable performance, will become the main alternatives after the "plastic limit", it can be predicted that in the next few years, pulp molding industry will usher in a good period of rapid development.
Pulp molding this environmentally friendly products in China's large-scale Production has a history of more than 30 years. From the early dry-pressing production process, the development of dry-pressing, wet-pressing process, more environmentally friendly and energy-saving direct-pressing process technology has become the new direction of pulp molding technology research and development.
I：Environmentally friendly features of pulp molding
(a) pulp molded products from a wide range of raw materials, most of the main raw materials used in herbaceous plant fibers, such as reeds, straw, rice straw, bagasse, bamboo and so on. At present, the domestic reed, bagasse, bamboo, straw and other grass fibers as the leading raw material of the pulp mill have their own pollution control system, in the raw material paper molded products completely out of a "centralized pulping, decentralized production," the road mode, not only their own environmental pollution problems, and can also get a more reliable raw material guarantee.
(B) pulp molded products production process technology is concise, the production process is basically no source of pollution, in line with the requirements of environmentally friendly production, coupled with a high degree of localization of pulp molding production equipment, very conducive to the promotion and application of the project.
(C) pulp molded products in a wide range of applications, market capacity, can be tapped into the potential is very rich, its products can be widely used in electrical packaging, planting seedlings, medical utensils, catering utensils and fragile liner and other fields, a compatible pulp molding production line as long as the improvement and replacement of molds can produce a variety of different uses of the product, its diversified functions and recyclable features make other The versatility and recyclability of this line makes it unmatched by other products of its kind.
(D) pulp molded tableware is an important branch of pulp molded products, it is easy to recycle, can be recycled, can degrade on its own, from nature and back to nature, is a typical non-polluting biodegradable green product, very much in line with the requirements of the times and the needs of the market.
II： Development trend of paper-plastic innovative technology
1 Intelligent unmanned production line gradually developed and applied
Swedish PalPac video information shows that the use of advanced direct Pressure process, the use of web or pulp board as raw materials, after Dispersing fiber and fiber molding, paper web pre-pressure, spraying and composite paper web, finished product extrusion and shaping process, the basic realization of intelligent unmanned operation. With the gradual application of intelligent and unmanned in the production process of packaging products, such as in the carton industry, packaging and printing industry, domestic intelligent An unmanned pulp molding production line is also gradually developed and applied.
2 Research on pulp molding composites
Pulp molding composites research and development is also the industry's hot spot, with the pulp molding products market for product function and quality requirements continue to complicated, simply by improving the production process and additives have been insufficient to meet market demand. And through the addition of other materials to change the raw material formula and product Performance, such as nanomaterials or high-strength fiber materials added to the raw material, so as to produce a special performance of the pulp molding packaging materials, but also an important research direction of the future of pulp molding.
3 The use of computer technology to test and analyze the performance and parameters of the product
The use of computer technology to accurately determine the performance and parameters of pulp molding products in order to achieve the quantitative calculation of process parameter design is to improve the quality of pulp molding products and production capacity of the key, while the computer technology is the use of these parameters for the specific product and process design basis. Based on the quantitative parameters and the use of professional software modeling, through the pulp molding product simulation and analysis, calculation of the relationship between the product process and the use of performance and parameters, can efficiently complete the optimization of the design of pulp molding products and their production process.
4 R & D of direct pressure production process and equipment
Traditional pulp molding wet molding process is the pulp fiber dispersed into the water, and then filtered with the forming net mold to form a wet paper mold blanks; and direct pressure production process is the raw material pulp board in the open loosening machine for the dissociation of thinning, in the conveying process of spraying latex resin, the formation of loose fibers in the formation of fiber networks on the forming network, and then processed through the hot press die-cutting equipment into paper molded products.
Direct pressure production process using continuous molding way to produce pulp molded products, it is a major change in the production method of pulp molding, pulp molding direct pressure production process compared with the traditional wet molding method, greatly reducing the traditional process of pulp board re-wetting and crushing, molding, drying process of a large amount of energy consumption.
With the healthy and rapid development of China's national economy, economic exchanges with countries around the world are becoming more and more frequent and close, and with the strong implementation of the "Plastic Restriction Order", pulp molding this emerging green industry will show a strong vitality and broad market prospects, through the industry's unremitting efforts and continuous innovation, pulp molding of the new technology, new equipment and new high-precision products will continue to be developed and researched, in the next few years, China's pulp molding industry will usher in a period of rapid development.