Surface coating modification In order to improve the gas barrier properties of PET, the surface coating method is also an economical and practical method that is often used. Most plastic beer bottles on foreign markets are PET products that have been surface-coated. PPG USA has successfully developed a gas barrier coating technology for PET bottles that can be removed when used bottles are recycled. The coating consists of a two-component epoxy-amine, which has toughness and moisture resistance. The thickness of the 0.5L PET bottle is 4 to 19 microns, and the barrier to oxygen can be increased by 2 to 12 times. The use of the coating not only does not affect the transparency of the bottle but also improves the gloss of the PET bottle. In addition, Nissei ASB Machinery Co., Ltd. of Japan developed the application technology of hard carbon film coating (DIC), Sidel of France developed the technology of amorphous carbon treatment of Actell inner surface, Glaskin process and Sealica process of Ruitu Techipak company, Tetra Pak. The company developed a new SiOx coating technology that coats the inner surface of PET beer bottles with 20 nanometers. The goal is to target oxygen sensitive food packaging markets such as ketchup, jams and beer bottles.
Nanocomposite modification In the 1990s, nanocomposite modification has become the main route for the preparation of advanced packaging materials. For example, in the past two years, Eastman Chemical and Nanocor Nano jointly developed nanocomposite packaging materials using PET as a base material, which greatly improved the barrier properties and heat resistance, and was mainly used in beverage packaging. In cooperation with Yanshan Petrochemical Company, the Institute of Chemistry of the Chinese Academy of Sciences conducted exploration and research on PET/MT nanocomposites (montmorillonite) and their applications. Translucent beer bottle samples have been produced. It is said that barrier properties are 3 to 4 times higher than PET bottles. , The heat resistance has also been improved, and the application prospects are promising.
Application of High Barrier Containers It is reported that some well-known beer manufacturers in the United States, Europe, Japan and Australia have begun to expand the use of plastic beer bottles. In November 1998, the American beer manufacturer Miller Corporation launched a PET (polyethylene/polyethylene) beer bottle to be tested in six regions in the United States. The growing market demand has prompted it to expand to the national market and other fields. At the end of 1998, French Dalong Company also introduced new products and adopted a 3-layer PET/EVOH compound beer bottle filling beer. Japan's Mitsubishi Plastics Corporation, Nissei ISB Machinery Co., Ltd. and Utech Inc. announced that in response to the current shortage of beer and beer cans in the Chinese market, polyester beer bottles will be introduced in China to realize the practical application of plastic beer bottles.
According to incomplete statistics, the share of beer packaging in the European PET packaging market has increased from 0.4% in 1997 to 1.7% in 2002. It is estimated that by 2005 global PET used for the production of plastic beer bottles will reach more than 1 million tons, North America will become the world's largest market, up to 250,000 tons. The Asia Pacific region followed, reaching 235,000 tons. By 2007, PET in Europe will reach 841,000 tons (accounting for 3.7% of the market). High-barrier PET bottles for packaging fruit juices, teas and sports drinks have increased from 2.8 billion in 1996 to 8.4 billion in 2000. In 2000, high-barrier PET bottles accounted for 50% of the beverage packaging market. This shows that the growth rate of packaging PET resin is one of the symptoms.
In addition, the difference between PEN and PET is only that the polymer molecular chain has a rigid naphthalene ring, rather than a benzene ring, but it exhibits excellent gas barrier properties, chemical resistance, and heat resistance (Tg=112 -123°C), strong UV shielding ability (interruption of UV light with a wavelength of 383 nm or less), and low gas adsorption. The carbonated beverage bottles and beer bottles made by blending PEN with PET by transesterification reaction and the PET/PEN blend extruder and blow molding machine specially manufactured by Japan for this purpose are all on the market. For example, the beer bottles manufactured by the US and Western European beer commercial PET/PEN blends have been sold in 7 cities including Los Angeles and Miami, with sales of up to 300 million bottles each year. The market prospects are very good.
With the development of the world's polyester modification technology, the output of China's packaging polyester resins is changing with each passing day, and its packaging consumption has grown rapidly. Experts estimate that by 2005 China's polyester resin production capacity will reach 680,000 tons. However, compared with the advanced level in foreign countries, the scale of production is relatively small, and the level of technology is also low. There is a wide gap in terms of variety and grade. In particular, the raw materials for polyester bottles of carbonated beverages such as Coca Cola and Pepsi are mainly imported, and the market demand is also large. So far, heat-resistant, impervious, radiation-resistant, high-barrier PET chips are still blank in the country. Most domestic manufacturers use high-tech polyester chips, such as pressure-resistant, heat-resistant, anti-infiltration, and radiation-resistant, as the main research and development direction in the future.
In China's PET barrier packaging technology, multi-layer coextrusion composite technology still dominates, followed by the use of blending technology and surface treatment technology to improve the barrier properties of PET. These technologies not only have high requirements for plastics processing machinery, large equipment investment, complicated process control, and high production costs, but also lead to outstanding environmental protection in PET barrier packaging due to difficulties in recycling and reuse caused by composite components after a single use. Problems, therefore, are generally limited in our country. To develop a high-barrier PET material that can produce products without modification or slight modification in the existing plastic processing machinery, it does not need to be combined with other barrier materials to have heat resistance and high barrier property, and has broad Market prospects.
According to expert analysis, modified PET bottles may appear in large numbers in China in recent years. At present, the main factor restricting the development and application of high barrier PET bottles is the high cost of raw materials. It is believed that with the improvement of the production process of high-barrier materials and the expansion of industrial production, the production cost of high-barrier PET will be greatly reduced, and the application range will be wider and wider. On the other hand, the development of high-barrier PET is in line with the trend of high-efficiency, energy-saving and environmental protection in the 21st century plastic packaging requirements. It has the comprehensive advantages of transparency, abrasion resistance, preservation, anti-aging, and recyclability. According to the beer bottle development and application prospects in the beverage market and the analysis of the current growth momentum in the market, the use of high-strength, high-barrier PET plastic bottles instead of glass bottles is not far behind.
With the continuous development of polyester modification technology, the properties of polyesters such as impact strength and barrier effect are increasingly improved. The huge market for PET bottles replacing beer in glass bottles will make breakthroughs in the use and demand for high-barrier PET. It is expected that in the next 10 years, its annual growth rate will reach about 20%. Some experts pointed out that in order to meet the requirements for improving the gas barrier properties of PET bottles, a lot of ongoing R&D work will contribute to the new development of PET food and beverage packaging.
With the development of the world's new high-barrier polyester materials, advances in processing technology, and improvement in people’s consumption levels, high-barrier PET will be used as packaging materials for food, cosmetics, liquor, wine, and beer, and reusable packaging materials. Rapid development.
The development of high-barrier PET is in line with the trend of high-efficiency, energy-saving, environmental protection and ecological direction in the world of polyester packaging materials, and the market prospect is very good. The development of PET functional packaging materials in China will also rapidly develop.
Nanocomposite modification In the 1990s, nanocomposite modification has become the main route for the preparation of advanced packaging materials. For example, in the past two years, Eastman Chemical and Nanocor Nano jointly developed nanocomposite packaging materials using PET as a base material, which greatly improved the barrier properties and heat resistance, and was mainly used in beverage packaging. In cooperation with Yanshan Petrochemical Company, the Institute of Chemistry of the Chinese Academy of Sciences conducted exploration and research on PET/MT nanocomposites (montmorillonite) and their applications. Translucent beer bottle samples have been produced. It is said that barrier properties are 3 to 4 times higher than PET bottles. , The heat resistance has also been improved, and the application prospects are promising.
Application of High Barrier Containers It is reported that some well-known beer manufacturers in the United States, Europe, Japan and Australia have begun to expand the use of plastic beer bottles. In November 1998, the American beer manufacturer Miller Corporation launched a PET (polyethylene/polyethylene) beer bottle to be tested in six regions in the United States. The growing market demand has prompted it to expand to the national market and other fields. At the end of 1998, French Dalong Company also introduced new products and adopted a 3-layer PET/EVOH compound beer bottle filling beer. Japan's Mitsubishi Plastics Corporation, Nissei ISB Machinery Co., Ltd. and Utech Inc. announced that in response to the current shortage of beer and beer cans in the Chinese market, polyester beer bottles will be introduced in China to realize the practical application of plastic beer bottles.
According to incomplete statistics, the share of beer packaging in the European PET packaging market has increased from 0.4% in 1997 to 1.7% in 2002. It is estimated that by 2005 global PET used for the production of plastic beer bottles will reach more than 1 million tons, North America will become the world's largest market, up to 250,000 tons. The Asia Pacific region followed, reaching 235,000 tons. By 2007, PET in Europe will reach 841,000 tons (accounting for 3.7% of the market). High-barrier PET bottles for packaging fruit juices, teas and sports drinks have increased from 2.8 billion in 1996 to 8.4 billion in 2000. In 2000, high-barrier PET bottles accounted for 50% of the beverage packaging market. This shows that the growth rate of packaging PET resin is one of the symptoms.
In addition, the difference between PEN and PET is only that the polymer molecular chain has a rigid naphthalene ring, rather than a benzene ring, but it exhibits excellent gas barrier properties, chemical resistance, and heat resistance (Tg=112 -123°C), strong UV shielding ability (interruption of UV light with a wavelength of 383 nm or less), and low gas adsorption. The carbonated beverage bottles and beer bottles made by blending PEN with PET by transesterification reaction and the PET/PEN blend extruder and blow molding machine specially manufactured by Japan for this purpose are all on the market. For example, the beer bottles manufactured by the US and Western European beer commercial PET/PEN blends have been sold in 7 cities including Los Angeles and Miami, with sales of up to 300 million bottles each year. The market prospects are very good.
With the development of the world's polyester modification technology, the output of China's packaging polyester resins is changing with each passing day, and its packaging consumption has grown rapidly. Experts estimate that by 2005 China's polyester resin production capacity will reach 680,000 tons. However, compared with the advanced level in foreign countries, the scale of production is relatively small, and the level of technology is also low. There is a wide gap in terms of variety and grade. In particular, the raw materials for polyester bottles of carbonated beverages such as Coca Cola and Pepsi are mainly imported, and the market demand is also large. So far, heat-resistant, impervious, radiation-resistant, high-barrier PET chips are still blank in the country. Most domestic manufacturers use high-tech polyester chips, such as pressure-resistant, heat-resistant, anti-infiltration, and radiation-resistant, as the main research and development direction in the future.
In China's PET barrier packaging technology, multi-layer coextrusion composite technology still dominates, followed by the use of blending technology and surface treatment technology to improve the barrier properties of PET. These technologies not only have high requirements for plastics processing machinery, large equipment investment, complicated process control, and high production costs, but also lead to outstanding environmental protection in PET barrier packaging due to difficulties in recycling and reuse caused by composite components after a single use. Problems, therefore, are generally limited in our country. To develop a high-barrier PET material that can produce products without modification or slight modification in the existing plastic processing machinery, it does not need to be combined with other barrier materials to have heat resistance and high barrier property, and has broad Market prospects.
According to expert analysis, modified PET bottles may appear in large numbers in China in recent years. At present, the main factor restricting the development and application of high barrier PET bottles is the high cost of raw materials. It is believed that with the improvement of the production process of high-barrier materials and the expansion of industrial production, the production cost of high-barrier PET will be greatly reduced, and the application range will be wider and wider. On the other hand, the development of high-barrier PET is in line with the trend of high-efficiency, energy-saving and environmental protection in the 21st century plastic packaging requirements. It has the comprehensive advantages of transparency, abrasion resistance, preservation, anti-aging, and recyclability. According to the beer bottle development and application prospects in the beverage market and the analysis of the current growth momentum in the market, the use of high-strength, high-barrier PET plastic bottles instead of glass bottles is not far behind.
With the continuous development of polyester modification technology, the properties of polyesters such as impact strength and barrier effect are increasingly improved. The huge market for PET bottles replacing beer in glass bottles will make breakthroughs in the use and demand for high-barrier PET. It is expected that in the next 10 years, its annual growth rate will reach about 20%. Some experts pointed out that in order to meet the requirements for improving the gas barrier properties of PET bottles, a lot of ongoing R&D work will contribute to the new development of PET food and beverage packaging.
With the development of the world's new high-barrier polyester materials, advances in processing technology, and improvement in people’s consumption levels, high-barrier PET will be used as packaging materials for food, cosmetics, liquor, wine, and beer, and reusable packaging materials. Rapid development.
The development of high-barrier PET is in line with the trend of high-efficiency, energy-saving, environmental protection and ecological direction in the world of polyester packaging materials, and the market prospect is very good. The development of PET functional packaging materials in China will also rapidly develop.
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