The “white pollution†has become more and more serious, and it directly threatens the living environment of human beings. Governance of “white pollution†and protection of the living environment are major and urgent new issues facing all humankind. China is a signatory to the "Montreal Protocol" and "Vienna Declaration." The “Declaration†and “Protocol†stipulate that our country must achieve its stated goal in 2005, and clearly stipulate that EPS foam packaging will be restricted and prohibited. On April 1, 1996, China promulgated the "Environmental Protection Law for Solid Wastes," which stipulates the principle of "three solidifications." It promotes the recycling, reduction and harmlessness of solid wastes. The use of pulp molded tableware instead of EPS foam plastic tableware is a manifestation of the three principles, in line with the principle of sustainable development of the national economy. Not long ago by the China Food and Packaging Machinery Industry Association, the China Environmental Protection Foundation, China Packaging News, attended by a person in charge of the Ministry of Railways, the Ministry of Information Industry, the National Machinery Industry Bureau, and the State Environmental Protection Administration People from all walks of life have made a definite conclusion that pulp molded products are an ideal substitute for EPS foam plastics.
Pulp molded tableware is a paper pulp molded product with Chinese characteristics that has been successfully developed by Chinese scientific and technical personnel after several years of hard work. It reflects the progress of civilization and the development of the times. After repeated trials, the paper pulp molded tableware has seven major advantages: (1) The product has good strength, can prevent oil from water, adapt to the Chinese dietary habits and food structure; (2) appearance is generous and practical; (3) the recovery value is high (4) Natural degradation effect is good; (5) mainly straw pulp, raw materials are widely cheap; (6) can produce a variety of shapes (bowls, boxes, plates, etc.) of the product; (7) low cost, easy to be consumed Accepted.
Pulp molded tableware is a green packaging product. It is a kind of product that can be biodegraded, has minimal industrial pollution during production and use, and can be reused. With the general improvement of material living standards and environmental awareness, people will consider more about the ecological characteristics of packaging, the impact on human health, the impact on the social environment, the ease of waste disposal, and the recycling of resources. Therefore, in order to protect the environment and save resources, promote the implementation of "green packaging" plan, develop green packaging, reduce packaging pollution to the environment, protect and improve the ecological environment, and promote the sustainable development of the national economy, in accordance with 3R and 1D (reduction, repeat The principle of using, recycling, and degrading is a major trend in the 21st century. The tilt of the national policy and the expansion of the international market will provide us with an excellent opportunity.
At present, there are still a large number of domestic manufacturers that are developing and developing several other disposable products that replace EPS foam plastic tableware, such as cardboard folding lunch boxes, biodegradable plastic lunch boxes, and planted fiber powder pressing tableware. The paperboard folding adhesive lunch box adopts single-sided or double-sided PE Xu film cardboard cutting and forming. Practice has proved that this product has high raw material cost, waste of waste material, product breakage rate, dull appearance, poor pressure capacity, raw paper board can not guarantee sanitary requirements, and the board can not be naturally degraded after PE film. Degradable plastic lunch boxes are still not ideal for their use. This is mainly due to the fact that the research and application of degradable plastics in China are still in the development stage. There are several problems in the process of practical application:
(1) Incomplete degradation will still cause pollution. Some of the components of degradable plastics are degraded or swallowed by microorganisms, leaving the "skeleton". Although these plastic residues do not exist in the form of large blocks like non-degradable plastics, they are only present in the form of small particles in the natural world, and they still affect the environment on the soil. For example, the “biodegradable polystyrene fast food box†developed by Shanghai Sanlin Degradable Resin Products Co., Ltd. can reach 80% degradation to carbon dioxide and water within 200 days, 20% is still powder, and small particles are suspended in the air to cause environmental pollution. Although the residual debris can be loose for the compacted clay, excessive coalescence can directly lead to "sandification" of the soil.
(2) The level of technology is not enough. The mechanism of degradation of plastics is relatively complex, not simply the physical blending of starch and plastics. Research and development work on degradable plastics in China is still in the process of exploration, and it will take a long time to improve the degradable plastic formula and develop completely degradable plastic products.
(3) The high price has seriously affected the promotion and application in the market. The use of plant fiber starch to suppress tableware is less practical, mainly because the color of the product is brownish yellow, which will affect the appetite of the consumers and is not suitable for tableware. Followed by the product is crunchy and easy to damage, can not afford to fold, poor pressure capacity. There are no goods on the market.
The pulp moulding industry has a history of more than 80 years in some developed countries, but our country has only 10 years in the future. However, due to the efforts of the vast number of scientific and technological personnel, various forms of pulp molded snack box production equipment have been successfully developed. Common is the reciprocating lifting vacuum forming pulp molding equipment. This equipment is divided into two types: semi-automatic and fully automatic. The semi-automatic type is characterized by simple equipment structure, low investment, labor intensity, poor equipment safety, and is not suitable for large-scale production. The structural form of the automatic production equipment and the design concept are different, and the differences are very large. One is the vacuum suction filter for the wet billet, the use of robots to transfer the wet billet to the hot blast flooding from the mold drying, the disadvantage is that the product deformation, must be plastic processing, high rejection rate, more auxiliary equipment, large area. The other method is to transfer the wet green material to a hot mold for pressure drying on the mold. The product is not deformed completely, but the equipment structure is more complex and is the future development direction.
Pulp molded tableware is a paper pulp molded product with Chinese characteristics that has been successfully developed by Chinese scientific and technical personnel after several years of hard work. It reflects the progress of civilization and the development of the times. After repeated trials, the paper pulp molded tableware has seven major advantages: (1) The product has good strength, can prevent oil from water, adapt to the Chinese dietary habits and food structure; (2) appearance is generous and practical; (3) the recovery value is high (4) Natural degradation effect is good; (5) mainly straw pulp, raw materials are widely cheap; (6) can produce a variety of shapes (bowls, boxes, plates, etc.) of the product; (7) low cost, easy to be consumed Accepted.
Pulp molded tableware is a green packaging product. It is a kind of product that can be biodegraded, has minimal industrial pollution during production and use, and can be reused. With the general improvement of material living standards and environmental awareness, people will consider more about the ecological characteristics of packaging, the impact on human health, the impact on the social environment, the ease of waste disposal, and the recycling of resources. Therefore, in order to protect the environment and save resources, promote the implementation of "green packaging" plan, develop green packaging, reduce packaging pollution to the environment, protect and improve the ecological environment, and promote the sustainable development of the national economy, in accordance with 3R and 1D (reduction, repeat The principle of using, recycling, and degrading is a major trend in the 21st century. The tilt of the national policy and the expansion of the international market will provide us with an excellent opportunity.
At present, there are still a large number of domestic manufacturers that are developing and developing several other disposable products that replace EPS foam plastic tableware, such as cardboard folding lunch boxes, biodegradable plastic lunch boxes, and planted fiber powder pressing tableware. The paperboard folding adhesive lunch box adopts single-sided or double-sided PE Xu film cardboard cutting and forming. Practice has proved that this product has high raw material cost, waste of waste material, product breakage rate, dull appearance, poor pressure capacity, raw paper board can not guarantee sanitary requirements, and the board can not be naturally degraded after PE film. Degradable plastic lunch boxes are still not ideal for their use. This is mainly due to the fact that the research and application of degradable plastics in China are still in the development stage. There are several problems in the process of practical application:
(1) Incomplete degradation will still cause pollution. Some of the components of degradable plastics are degraded or swallowed by microorganisms, leaving the "skeleton". Although these plastic residues do not exist in the form of large blocks like non-degradable plastics, they are only present in the form of small particles in the natural world, and they still affect the environment on the soil. For example, the “biodegradable polystyrene fast food box†developed by Shanghai Sanlin Degradable Resin Products Co., Ltd. can reach 80% degradation to carbon dioxide and water within 200 days, 20% is still powder, and small particles are suspended in the air to cause environmental pollution. Although the residual debris can be loose for the compacted clay, excessive coalescence can directly lead to "sandification" of the soil.
(2) The level of technology is not enough. The mechanism of degradation of plastics is relatively complex, not simply the physical blending of starch and plastics. Research and development work on degradable plastics in China is still in the process of exploration, and it will take a long time to improve the degradable plastic formula and develop completely degradable plastic products.
(3) The high price has seriously affected the promotion and application in the market. The use of plant fiber starch to suppress tableware is less practical, mainly because the color of the product is brownish yellow, which will affect the appetite of the consumers and is not suitable for tableware. Followed by the product is crunchy and easy to damage, can not afford to fold, poor pressure capacity. There are no goods on the market.
The pulp moulding industry has a history of more than 80 years in some developed countries, but our country has only 10 years in the future. However, due to the efforts of the vast number of scientific and technological personnel, various forms of pulp molded snack box production equipment have been successfully developed. Common is the reciprocating lifting vacuum forming pulp molding equipment. This equipment is divided into two types: semi-automatic and fully automatic. The semi-automatic type is characterized by simple equipment structure, low investment, labor intensity, poor equipment safety, and is not suitable for large-scale production. The structural form of the automatic production equipment and the design concept are different, and the differences are very large. One is the vacuum suction filter for the wet billet, the use of robots to transfer the wet billet to the hot blast flooding from the mold drying, the disadvantage is that the product deformation, must be plastic processing, high rejection rate, more auxiliary equipment, large area. The other method is to transfer the wet green material to a hot mold for pressure drying on the mold. The product is not deformed completely, but the equipment structure is more complex and is the future development direction.
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