Characteristics and trends of plastic packaging de

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Characteristics and trends of the development of plastic packaging in the world

prospects for the development of plastic packaging materials in the world

internationally, although plastic packaging materials have been facing serious challenges from environmental problems, according to the data published in recent years, plastic packaging is still one of the materials with the fastest demand growth in the packaging industry. According to the statistical analysis and prediction of American Freedonia group, the average growth rate of paper and plastic in the packaging field in the United States was 2.4% from 1996 to 2001, including 1.6% for paperboard and 3.4% for plastic. According to the statistical data of Japan's "packaging technology", the sales volume of plastic packaging materials in Japan accounts for 15.4% of the total sales volume of all kinds of packaging, still ranking second after paper and paperboard (57.5%), the rest are metal 12%, glass 9.2%, wood 5.2%, and others 0.7%

according to the above development and prediction of the United States, Japan and China, it is obvious that plastic packaging materials will continue to grow steadily in the 21st century, remain vibrant in the field of packaging materials, and continue to play an active role in protecting commodities and improving the value of commodities

The 21st century is a century of environmental protection. Environmental problems are becoming increasingly important, and resources and energy are becoming more and more tense. Plastic packaging materials will usher in new opportunities and face severe challenges. In order to meet the requirements of the new era, plastic packaging materials, in addition to meeting the increasing requirements of market packaging quality and efficiency, are further required to save energy and resources, and are easy to be recycled or degraded by the environment after use as the starting point of technological development. Therefore, plastic packaging materials are developing in the direction of high function, multi-function, environmental adaptability, the use of new raw materials, new processes, new equipment and the expansion of application fields

high functional and multifunctional plastic packaging materials have become the packaging materials developed by many countries, and some products have been put into industrial production. Such materials include plastic packaging materials with high impermeability, multi-functional freshness, selective permeability, heat resistance, sterility (anti-bacterial), rust prevention, deodorization, shape memory, resealability, and easy unsealing. Among them, high impermeability, multi-functional freshness preservation, sterile packaging materials, etc. are developing more rapidly. In addition, nanocomposite packaging materials that are being researched and developed in recent years will receive attention

on the basis of the development of the 20th century, the production and processing technology of plastic blends, plastic alloys and inorganic filled and reinforced composites (ABC), which are known as the stars of tomorrow's plastics, will be further improved and improved, and greater progress will be made in the improvement of product performance, serialization and functionalization, which will have a greater impact on improving the quality of plastic packaging, added value, environmental adaptability and the development of new products

with the improvement of the quality of plastic packaging products, the increase of functionality and the continuous development of new varieties, its use has also been further expanded. In particular, high resistance plastic packaging materials, mainly food packaging, will gradually expand the field of non food packaging, including industrial packaging, pharmaceutical packaging, agricultural and sideline products packaging, building materials packaging, marine supplies packaging, etc. will be further developed

development trend of domestic plastic packaging materials

the technical level of high barrier and multi-functional film continues to improve

high barrier and multi-functional soft plastic packaging materials have become the focus of development in recent years, and a number of new products and technologies have emerged, including high impermeability, multi-functional fresh-keeping film and sterile packaging film. The original composite film is developing to a deeper level, including bag making Printing technology has reached a new level and entered the era of "Color Revolution". There are offset, gravure and flexographic color systems in the whole industry, which promotes the in-depth development of flexible plastic packaging materials

the development of dry composite film technology is inseparable from the technological progress of adhesives and inks. The adhesives of composite films include one component and two component polyurethane, acrylic adhesives, solvent-free, alcohol solvents, water-soluble adhesives, etc. At present, foreign environmental friendly adhesives have entered the Chinese market, and domestic adhesive manufacturers are also actively developing them. Nearly 30 solvent-free production lines have been introduced, but the technology can not meet the requirements of coating and drying process, and the cost is also high. Therefore, finding a new way that meets the development of the industry and meets the requirements of environmental protection is the key to the problem

the development of multi-layer coextrusion technology has changed the product structure of functional films and containers, and adapted to the market demand

with the development of market economy, higher requirements have been put forward for the packaging of daily necessities, cosmetics, food and household appliances. On the other hand, with the growing call for environmental protection, on the premise of meeting the functionality of packaging, try to reduce the amount of garbage generated, so as to make the packaging film and packaging container lightweight and thin-walled. Yi chengxinneng's senior executive said frankly when replying to the investor. The discharge of adhesives and solvents in the production process of high barrier films based on dry compounding is easy to pollute the environment. The development of CO extrusion packaging films has the advantages of low investment in process equipment, low cost, strong adaptability and convenient operation. Coextrusion technology has developed rapidly in the world. Relevant data show that coextrusion packaging film accounts for 40% of the whole flexible plastic packaging materials in developed countries, but only 6% in China. Dry composite film is still the main method, and the proportion of the two is unreasonable. At present, our co extrusion technology has also been improved. At present, in addition to the promotion and application of the superposition head technology of Dalian Liaonan Dongfang Machinery Company, the domestic coextrusion blow molding technology and equipment have passed the product identification and began mass production. The five layer co extrusion high barrier film blowing unit developed by Guangdong Jinming plastic equipment company has passed the new product appraisal. The development of CO extrusion packaging film will change the product structure of multifunctional film, which is suitable for the packaging of liquid food, milk, fresh meat and other food

The development of coextrusion technology also meets the needs of industrial packaging. Qinchuan machinery company has successfully developed a six layer coextruded plastic hollow container for the production of automotive fuel tanks, with a maximum volume of 200 liters. The machine adopts new technology to ensure 100 control points for the wall thickness of the parison and make the thickness of the container uniform. The electrical, hydraulic and pneumatic pressure are stable without oil and gas leakage. The feeding system ensures the continuous and stable feeding of the six extruders. The production of this machine will change the single-layer situation of automobile fuel tank. With the development of automobile industry, the market of multi-layer fuel tank will have greater development space

the market prospect of fresh-keeping packaging film for vegetables and fruits is broad.

China's total output of fruits and vegetables in 2000 reached 71 million tons, and the output of vegetables was 300 million tons. It is the world's largest country in the production and sales of fruits and vegetables. However, about 30% of fruits are lost in the process of storage, transportation and sales, and improper packaging is one of the reasons for the loss of fruit decay. In the highly competitive market conditions, the role of packaging is becoming more and more important. Although the physiological properties of different fruits are different, color change, water loss, taste change and decay are common problems. Therefore, how to inhibit the metabolic process, reduce the consumption of nutrients, and maintain the flavor quality of fruits is an important topic of fresh-keeping packaging. At present, polyethylene film and polypropylene film are the most widely used packaging materials for fresh fruits and vegetables. Different fruits and vegetables have different requirements for fresh-keeping packaging bags. The following factors are mainly considered when choosing a film bag:

(1) adapt to the gas permeability and maintain appropriate O2 and CO2 concentrations. According to the test, if the air permeability is poor, the O2 concentration in the bag is too low, which will also cause damage to the fruit. Therefore, new polyethylene fresh-keeping films are also emerging, and the emergence of microporous films has added new options to the packaging of tropical fruits

(2) add ethylene gas absorbent. Fruits release ethylene gas during Post Harvest Ripening, and ethylene accumulates in packaging bags, which will accelerate fruit aging and shorten storage period. Therefore, porous substances such as silica (zeolite, rutile, Fangying, SiO2) need to be added in the film manufacturing process to adsorb the ethylene released from the fruit, which can slow down the respiration of the fruit and make the fruit fresh-keeping

there are attractive business opportunities in the plastic beverage bottle Market

the plastic packaging container application market is broad, among which, there are attractive business opportunities in the beverage industry. In 2002, the beverage output has reached 20.24 million tons, including soda, fruit juice, vegetables The demand for plastic containers for beverages is increasing day by day. According to the survey, China's beverage output was nearly 23.84 million tons in 2002, with an annual growth rate of more than 20%, while the application proportion of PET bottles in carbonated beverage packaging accounted for 57.4%, and the market prospect was promising. At present, the enterprises with large PET bottle output in the industry include Zhuhai Zhongfu and Shanghai Zijiang group, which respectively occupy 30% and 20% of the domestic PET bottle market share. Zhuhai Zhongfu company is the first pet bottle manufacturer recognized by cola and Baile. In 2001, there were 3.2 billion PET bottles, of which 700million were hot filled, with a sales volume of 2.34 billion yuan. It has more than 30 factories around the country. Shanghai Zijiang group has developed rapidly in recent years, with 15 holding companies located in various regions, occupying the markets of Wuhan, Zhengzhou, Tianjin, Changchun, Kunshan, Chengdu, etc. the newly-built annual output of 120million PE has finally selected 10 qualified member t filling bottles and has been put into production. In 2002, it invested and built factories in Shanghai, Guangzhou, Chengdu, Beijing and other places, with a production capacity of 485million hot filling bottles

polyester bottles started late in the plastic packaging industry. The introduction of a large number of injection, drawing and blowing technology and equipment has promoted the large-scale production of PET bottles, and with its excellent performance, it has been welcomed by users. In just a few years, it has become the mainstream packaging material for the packaging of edible oil and beverage bottles. At the same time, the demand in cosmetics, medicine and other industries is also increasing. In 1996, the output of PET bottles was 3billion, but in 1998, it increased to 5billion, reached 8billion in 2000, 9billion in 2001, and is expected to reach 10billion in 2002. With an annual growth rate of 18%, it has become the largest variety of plastic packaging materials. Especially since 2001, with the sudden rise of the domestic tea beverage market, the output of tea beverage in 2001 has reached 3million tons. Therefore, hot filled 85 ~ 90 ℃ PET bottles have become the fastest-growing variety of polyester bottles, with an annual growth rate of more than 50%

The development of transparent polypropylene packaging bottles is a hot spot in plastic packaging at home and abroad in recent years. With the successful development of transparent modifier nucleating agent, 0.1% to 0.4% sorbitol xylene (benzaldehyde) nucleating agent (American Milliken, new Japan physicochemical, Erjing East Asia, brand mil lad3988, etc.) is added to ordinary pp. high transparent PP can be widely used in injection, extrusion, blow drawing, extrusion, hot containers, food and drug bottles, etc. its price is appropriate, and it is a competitor of PS, ABS, pet and PE bottles, It has broad market prospects

the application of beer plastic packaging bottles has been in the spring. In recent years, the use of heat-resistant polyester bottles (PET) in the international beer packaging industry has developed rapidly, especially the application of PET bottle coating technology (plasma technology), which is internally coated with a 0.21mm carbon layer. Its impermeability is almost the same as that of glass. At the same time, it can withstand high-temperature sterilization, so that its application range is expanded, and it is suitable for the packaging of hot filled tea drinks

in addition, polyethylene naphthalate (pen) new polyester bottles, which have attracted the attention of the packaging industry, are stepping into the beer industry and causing a revolution in beer packaging (a good strategy to overcome the beer bottle explosion). Because the molecular structure of pen is similar to that of pet, the benzene ring is replaced by naphthalene ring, which makes pen more excellent than PET in terms of permeability resistance, UV linearity, heat resistance and high temperature resistance (amorphous pen heat resistance

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