Pulp molded products are developed with the environmental protection and attention of people and breakthroughs in related technologies. Their performance and good recyclability have been widely recognized by people. In particular, the unique good breathability of pulp molded products, when used as packaging products "breathing life" products, such as fruits, eggs, flower seedlings, fresh foods, through its own packaging for its breathable, absorbent, hydrophobic, separated The heat is controlled and regulated so as to increase the shelf life and extend the shelf life. In addition, the requirements of the modern society for environmental protection are getting higher and higher, and a wave of "green revolution" is set off for packaging. Therefore, many factors have brought unprecedented opportunities for the development of pulp molded products.
Pulp-molded products (abbreviated as paper-molded products), despite their rapid development and wider application, are still plagued with problems that require research and innovation.
The development trend of paper molding products is mainly reflected in many aspects such as technology (process), material raw material utilization, equipment processes, and product application scope.
Paper Molding Technology Trends Paper molding technology has basically matured. Paper molding products, raw material composition ratio, surface coating treatment, drying and shaping after molding (some without plastic surgery), its technology and production process have been exploration and research for many years, has basically approached Mature, the produced paper molding products can meet the packaging requirements of most products, such as fruits, eggs, food, communication equipment, small home appliances and other products can be used paper packaging products for internal packaging or part outside package.
At present, paper molding products people are making innovations and breakthroughs in how to make them lighter, simplify processes and improve efficiency and energy saving. For example, for the surface coating of paper-type packaging for Chinese fast food packaging, many of its coating materials rely on imports, which is a technical problem that is urgently needed to break through and digest new ones. At the same time, people are also stepping up to look for plastic molding and drying integration technology (which is already implemented in a few manufacturers).
Diversification of raw materials for paper moulding products In the past, most of the raw materials used in paper moulding products were made of high-grade wood pulp. Most of these wood pulps were imported, and they have gradually become more diversified. There are several major trends in the application of raw materials for paper molding products:
1. Plant fibers plus pulp The plant fibers are mainly smashed pulp of rice stalks (shells), wheat stalks, and corn stalks. When paper molding products are produced, a certain proportion of the original pulp is added to increase its strength and color quality. .
2. Starch paper molds are mainly made of various kinds of starch as raw materials through adsorption or grouting into paper products. The more widely used starches are corn starch, sugar cane powder and potato starch. Starch paper molding products have a certain degree of moisture absorption during use, and they will inevitably cause mildew at different levels. Therefore, although some units produce products, the mass production and application still need to be further studied.
3. Application of pure plant straw material This kind of material is mainly made of annual herbaceous straw fiber material. It is pulverized by a special process and then formed into a paper molding product. This kind of material is more readily available, suitable for China's national conditions, especially for the vast number of crop by-products found value-added use. Moreover, the relative cost is low, the added value is high, and it can be completely degraded. It is also non-polluting in the production process and after its use. It can also be used as feed and fertilizer, non-toxic and non-mutagenic activity, and its thermal insulation is also very good. After the brittleness, odor and color are improved through the process, it will have a good prospect of development.
4. Double Degradable Paper Molding Material This is a kind of multi-degradable paper mold material. It is made by adding a variety of crop waste (straw and rice hull, wheat straw, corn stalk, corn cob, tanned skin, peanut shell, etc.) to a plastic resin after being crushed and powdered. Paper moldings. At the same time adding a certain amount of photosensitizer, the paper molded product made of this material is actually a kind of paper-plastic product, and it is difficult to completely degrade after being used for a long time. In a strict sense, it is not a kind of green packaging. .
In addition, the use of bean curd residue, sugar cane bag made Deng paper molded products.
Paper molding equipment tends to become more efficient Multi-functional paper molded products Although their production technology tends to be mature, they were mostly produced through the introduction of large-scale production equipment. At present, due to the limitations of the market and various types of product usage (output), it is necessary to use small-sized, multi-functional (manufactured multiple products), high-efficiency and energy-saving equipment for production. After many years of introduction, digestion, and innovation, China has been able to manufacture paper molding products related equipment. Through the user's use, market inspection, paper mold production is not large and many different specifications of the actual requirements, paper molding products production equipment is tending to multi-function (a device can produce a variety of specifications of paper products), high-speed production High efficiency, process simplification (reduction of some processes: such as shaping or baking), small size, small footprint, simple structure and other directions.
Some multifunctional, bake-free, plastic-free small and medium-sized paper mold equipment has begun to enter the use stage.
Specially processed paper-molded products with special functions will continue to emerge With the continuous development of social development and various products, paper-molded products requiring various special functions must be processed by special methods. For example, incorporation of finely ground fibers in different processes can increase their wet strength or improve their hydrophobicity, adhesive strength, and shrinkage, and can also control their biodegradation rate after use or during use; adding fluorocarbons. The compounds, together with the cation-retaining agent, allow paper molded articles to have the properties of repelling paper surface tension, oil and grease-like liquids.
It can also meet the special requirements of paper molding products by adding additives such as complexing agents, dyes, flame retardants, modified starch or wet strength resins.
The application scope of paper molding products is expanding Modern paper molding products are no longer a single paper mold packaging product in the traditional sense. Its uses and types are expanding and extending. For example, paper molding products have gradually shifted from the packaging of light agricultural and forestry products to the packaging of industrial products (packing of fragile glass, ceramics, enamel products, communications, electronics and precision instrumentation, small mechanical devices and tools); from the past It is mainly used for the export product packaging, shifting to both export and domestic sales; the paper mold structure has also evolved from small, single functions in the past to large-scale multi-purposes; from the industry point of view, it has been gradually used in the packaging industry to gradually transform into multiple industries (interior decoration, Furniture, daily use, agriculture, fruit and vegetable industry, health industry, etc.)
The good performance of paper molding products, especially the environmental protection performance, has been widely recognized by people. However, in terms of promotion and application, little progress has been made. This is mainly due to some problems.
1. The high price of paper mold products The biggest problem in the use of paper mold products is that the price is too high, which affects its promotion and application. Currently replacing the most demanding disposable fast food boxes, paper mold fast food boxes and EPS fast food boxes In comparison, the price difference between single items is 3-5 times and it is difficult for society to accept it, thus affecting the promotion and application.
2. Paper mold products A single type of paper mold products are very diverse at present. They are mainly fast food boxes, buffer liners, and some types of square, round barrel-shaped agricultural products. They are not as complete as the plastic products and have various structures. In addition, the appearance and color of the paper molded product are also difficult to compete with the plastic product.
3. Equipment and Mould Manufacturing Technology Lag The current domestic paper mold manufacturing equipment generally suffers from problems of low efficiency, high energy consumption, and low specification of the machine type. In particular, the tool making method is backward, the production cost is high, and the efficiency is low. As a result, the paper mold product has a single product type and high cost. At present, it is urgent to innovate the existing production equipment for paper molding products so that it can be highly automated. Paper mold manufacturing technology and means urgently need to break through.
4. Lack of policy guidance and control At present, the production and application of paper-based molded products are mostly guaranteed by non-mandatory policies and regulations since the issuance of related products and related technologies and equipment. There are no special standards issued by the state and the department. It is difficult to form large industries for paper molded products.
5. Miscellaneous issues Although the market potential of paper-molded products is very large, the consumer market has not yet fully matured. There are many manufacturers of products and equipment, and the management of related departments is disorderly, resulting in fierce competition and irregularities, resulting in unstable product quality. The small scale of production, high cost, and the inability to produce economies of scale have made it difficult to make large-scale promotion of industrialization.
(Wen Yang Fuxin Zhuzhou Institute of Technology Professor)
Pulp-molded products (abbreviated as paper-molded products), despite their rapid development and wider application, are still plagued with problems that require research and innovation.
The development trend of paper molding products is mainly reflected in many aspects such as technology (process), material raw material utilization, equipment processes, and product application scope.
Paper Molding Technology Trends Paper molding technology has basically matured. Paper molding products, raw material composition ratio, surface coating treatment, drying and shaping after molding (some without plastic surgery), its technology and production process have been exploration and research for many years, has basically approached Mature, the produced paper molding products can meet the packaging requirements of most products, such as fruits, eggs, food, communication equipment, small home appliances and other products can be used paper packaging products for internal packaging or part outside package.
At present, paper molding products people are making innovations and breakthroughs in how to make them lighter, simplify processes and improve efficiency and energy saving. For example, for the surface coating of paper-type packaging for Chinese fast food packaging, many of its coating materials rely on imports, which is a technical problem that is urgently needed to break through and digest new ones. At the same time, people are also stepping up to look for plastic molding and drying integration technology (which is already implemented in a few manufacturers).
Diversification of raw materials for paper moulding products In the past, most of the raw materials used in paper moulding products were made of high-grade wood pulp. Most of these wood pulps were imported, and they have gradually become more diversified. There are several major trends in the application of raw materials for paper molding products:
1. Plant fibers plus pulp The plant fibers are mainly smashed pulp of rice stalks (shells), wheat stalks, and corn stalks. When paper molding products are produced, a certain proportion of the original pulp is added to increase its strength and color quality. .
2. Starch paper molds are mainly made of various kinds of starch as raw materials through adsorption or grouting into paper products. The more widely used starches are corn starch, sugar cane powder and potato starch. Starch paper molding products have a certain degree of moisture absorption during use, and they will inevitably cause mildew at different levels. Therefore, although some units produce products, the mass production and application still need to be further studied.
3. Application of pure plant straw material This kind of material is mainly made of annual herbaceous straw fiber material. It is pulverized by a special process and then formed into a paper molding product. This kind of material is more readily available, suitable for China's national conditions, especially for the vast number of crop by-products found value-added use. Moreover, the relative cost is low, the added value is high, and it can be completely degraded. It is also non-polluting in the production process and after its use. It can also be used as feed and fertilizer, non-toxic and non-mutagenic activity, and its thermal insulation is also very good. After the brittleness, odor and color are improved through the process, it will have a good prospect of development.
4. Double Degradable Paper Molding Material This is a kind of multi-degradable paper mold material. It is made by adding a variety of crop waste (straw and rice hull, wheat straw, corn stalk, corn cob, tanned skin, peanut shell, etc.) to a plastic resin after being crushed and powdered. Paper moldings. At the same time adding a certain amount of photosensitizer, the paper molded product made of this material is actually a kind of paper-plastic product, and it is difficult to completely degrade after being used for a long time. In a strict sense, it is not a kind of green packaging. .
In addition, the use of bean curd residue, sugar cane bag made Deng paper molded products.
Paper molding equipment tends to become more efficient Multi-functional paper molded products Although their production technology tends to be mature, they were mostly produced through the introduction of large-scale production equipment. At present, due to the limitations of the market and various types of product usage (output), it is necessary to use small-sized, multi-functional (manufactured multiple products), high-efficiency and energy-saving equipment for production. After many years of introduction, digestion, and innovation, China has been able to manufacture paper molding products related equipment. Through the user's use, market inspection, paper mold production is not large and many different specifications of the actual requirements, paper molding products production equipment is tending to multi-function (a device can produce a variety of specifications of paper products), high-speed production High efficiency, process simplification (reduction of some processes: such as shaping or baking), small size, small footprint, simple structure and other directions.
Some multifunctional, bake-free, plastic-free small and medium-sized paper mold equipment has begun to enter the use stage.
Specially processed paper-molded products with special functions will continue to emerge With the continuous development of social development and various products, paper-molded products requiring various special functions must be processed by special methods. For example, incorporation of finely ground fibers in different processes can increase their wet strength or improve their hydrophobicity, adhesive strength, and shrinkage, and can also control their biodegradation rate after use or during use; adding fluorocarbons. The compounds, together with the cation-retaining agent, allow paper molded articles to have the properties of repelling paper surface tension, oil and grease-like liquids.
It can also meet the special requirements of paper molding products by adding additives such as complexing agents, dyes, flame retardants, modified starch or wet strength resins.
The application scope of paper molding products is expanding Modern paper molding products are no longer a single paper mold packaging product in the traditional sense. Its uses and types are expanding and extending. For example, paper molding products have gradually shifted from the packaging of light agricultural and forestry products to the packaging of industrial products (packing of fragile glass, ceramics, enamel products, communications, electronics and precision instrumentation, small mechanical devices and tools); from the past It is mainly used for the export product packaging, shifting to both export and domestic sales; the paper mold structure has also evolved from small, single functions in the past to large-scale multi-purposes; from the industry point of view, it has been gradually used in the packaging industry to gradually transform into multiple industries (interior decoration, Furniture, daily use, agriculture, fruit and vegetable industry, health industry, etc.)
The good performance of paper molding products, especially the environmental protection performance, has been widely recognized by people. However, in terms of promotion and application, little progress has been made. This is mainly due to some problems.
1. The high price of paper mold products The biggest problem in the use of paper mold products is that the price is too high, which affects its promotion and application. Currently replacing the most demanding disposable fast food boxes, paper mold fast food boxes and EPS fast food boxes In comparison, the price difference between single items is 3-5 times and it is difficult for society to accept it, thus affecting the promotion and application.
2. Paper mold products A single type of paper mold products are very diverse at present. They are mainly fast food boxes, buffer liners, and some types of square, round barrel-shaped agricultural products. They are not as complete as the plastic products and have various structures. In addition, the appearance and color of the paper molded product are also difficult to compete with the plastic product.
3. Equipment and Mould Manufacturing Technology Lag The current domestic paper mold manufacturing equipment generally suffers from problems of low efficiency, high energy consumption, and low specification of the machine type. In particular, the tool making method is backward, the production cost is high, and the efficiency is low. As a result, the paper mold product has a single product type and high cost. At present, it is urgent to innovate the existing production equipment for paper molding products so that it can be highly automated. Paper mold manufacturing technology and means urgently need to break through.
4. Lack of policy guidance and control At present, the production and application of paper-based molded products are mostly guaranteed by non-mandatory policies and regulations since the issuance of related products and related technologies and equipment. There are no special standards issued by the state and the department. It is difficult to form large industries for paper molded products.
5. Miscellaneous issues Although the market potential of paper-molded products is very large, the consumer market has not yet fully matured. There are many manufacturers of products and equipment, and the management of related departments is disorderly, resulting in fierce competition and irregularities, resulting in unstable product quality. The small scale of production, high cost, and the inability to produce economies of scale have made it difficult to make large-scale promotion of industrialization.
(Wen Yang Fuxin Zhuzhou Institute of Technology Professor)
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