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Wholesale household Packing Manufacturer in China
Plastic packaging refers to the use of plastic packaging. Plastics are mainly made of synthetic or natural macromolecule resins. After adding various additives, it has ductility at a certain temperature and pressure, and can fix its shape after cooling.
The process of plasticizing natural or synthetic macromolecule resin molecule in melting state and uniformly distributed adjuvant molecule around it is called plasticizing. It has reached the stage of plasticizing, which is called plasticizing, not yet achieved, and is considered to have not yet been plasticized. Plastic packaging is one of the four major materials in packaging industry: paper and cardboard account for 30%, plastic 25%, metal 25%, glass 15%.
Plastics classification
Plastics can be divided into two categories according to their own properties: thermoplastics which can be processed repeatedly and can basically maintain their properties, and thermosetting plastics which can only be processed once. According to its use, it can be divided into general plastics with wide use, low price and good comprehensive performance, such as PE, PP, PVC, PS, and amino plastics, which have good physical and mechanical strength, and may replace metals in engineering machinery such as ABS, nylon, polyester, POM, TPX-1, etc. And a class of engineering plastics with excellent properties, such as: special plastics with excellent radiation resistance, high temperature resistance, such as: polyaromatic sulfone, liquid crystal polymers, etc. Thermoplastics can be divided into amorphous polymers and crystalline polymers according to the molecular crystalline size of thermoplastic resins.
Main characteristics
The main characteristics of plastics are: first, low density, high specific strength, can obtain higher packaging yield, that is, "unit mass of packaging volume or size of packaging area." Secondly, most plastics have good chemical resistance, good acid resistance, alkali resistance, resistance to various organic solvents, long-term storage, no oxidation. Thirdly, the forming process is easy and the energy consumption is lower than that of steel and other metal materials. Fourth, it has good transparency and easy coloring. Fifth, it has good strength, high strength per unit weight, impact resistance and easy modification. Sixth, the processing cost is low. Seventh, excellent insulation.
Development of Packaging Industry
In the synthesis, 25% is used in the packaging industry. For this reason, plastic packaging is an important part of the plastic packaging industry. Plastic packaging is one of the four major materials in the packaging industry: paper and cardboard account for 30%, plastic 25%, metal 25%, glass 15%. The above two 25% fully illustrate the importance of plastic packaging industry. Although plastic packaging industry is the second packaging material, its practical surface is not as good as paper and cardboard packaging. But the plastic packaging industry is developing at a rate of 5% every year, while other packaging materials, including paper and cardboard, metal, glass, pottery inkstone, linen and cotton, are only growing at a rate of 2%. For this reason, one day the plastic packaging industry will surpass paper and cardboard and become the first packaging material.
China's modern packaging industry has developed rapidly since the implementation of the policy of reform and opening up. After 30 years of development, China's packaging industry has become an independent, complete and complete industrial system with paper, plastics, metal, glass, packaging, printing and packaging machinery as the main industries, and a packaging industry pattern with the Yangtze River Delta, the Pearl River Delta and the Bohai Bay as the key areas.
In terms of the total amount of packaging industry, China is a big packaging country, but not a powerful packaging country. It shows that the ability of independent innovation of enterprises is still weak, the added value of products is low, and the value of packaging is not fully reflected in the industrial chain. Repeated construction at a low level has led to a prominent contradiction between excess capacity of low-end products and insufficient supply of high-end products and a lack of stamina for development. China's packaging industry needs to change from relying solely on volume growth and capacity expansion to relying on scientific and technological innovation, technological progress and structural optimization to enhance the core competitiveness of industrial development. [1]
Packaging Containers
In terms of packaging containers, the original packaging of beverages was glass bottle, followed by paper compound container, and then PET bottle. Now rigid PET bottle is the largest packaging material for carbonated beverages and non-carbonated beverages. In 1991, it accounted for 26.5% of beverage packaging containers in the United States. Glass bottles have decreased from 28.9% in 1981 to 19.5% of beverage packaging containers. Accounting for 39%. And plastic bottles are growing at an annual rate of more than 3%. To be sure, even in countries where the plastic packaging industry is most blamed. Plastics will continue to develop at a much faster rate than other packaging materials, because many characteristics of plastics can not be replaced by any other packaging materials. While the plastic packaging industry has occupied the field of sales packaging, it has developed to transport packaging, which will eventually force the metal-based "transport packaging" to be replaced by plastic-based.
Classification and characteristics
Plastic packaging bags can be divided into OPP, CPP, PP, PE, PVA, EVA, composite bags, co-extrusion bags and so on.
OPP plastic bag:
Characteristic: Hard, unchanged after pulling. Non-stretchable (bidirectional pulling) single sheet folding, edge sealing welding, the longest length can not exceed 640m/m. The single chip is 1.28M long and 0.6M wide.
Advantages: Good transparency.
Disadvantage: The seals on both sides are easy to tear.
PP plastic bag: polypropylene
Characteristic: Hardness is inferior to OPP. It can be stretched (two-way stretching) to form triangle, bottom or side seal (envelope bag), cylinder material. Transparency is worse than OPP.
PE Plastic Bag: Polyethylene Polyethylene
Characteristics: Formalin, slightly less transparent.
HDPE: High density polyethylene, high density polyethylene, has a crisp handle, and is mostly used for making horse pockets.
LDPE: Low density polyethylene, low density polyethylene, has a soft handle.
PVA Plastic Bag: Vinylon
Characteristic: Environmental protection material, will dissolve in water. This raw material can not be produced at home. It is imported from Japan. It is expensive and widely used abroad.
Advantages, soft and transparent, pollution-free.
Characteristic: Non-toxic, godless formalin, compoundable, better transparency than PE, slightly worse hardness. After pulling, it will grow out with soft texture, transparency of PP and softness of PE.
Characteristic: The edge seal is strong, can be printed, and the ink will not fall off.
Blister packaging
Plastic products are produced by plastic absorption process and packaged with corresponding equipment.
Characteristic
The main advantages of plastic-absorbing packaging are: saving raw and auxiliary materials, light weight, convenient transportation, good sealing performance, meeting the requirements of environmental protection and green packaging; packaging any special-shaped products without additional cushioning materials; packaging products are transparent and visible, beautiful appearance, easy to sell, and suitable for mechanized and automated packaging. Easy to modernize management, save manpower and improve efficiency
equipment
Absorption packaging equipment mainly includes: Absorption molding machine, punch, sealing machine, high frequency machine, folding machine.
Product classification
Packaging products can be divided into: insert cards, suction cards, double bubble shells, semi-bubble shells, folded double bubble shells, three folded bubble shells and so on.
concept
PPO plastics, the Chinese name is polyphenyl ether. It has the advantages of high rigidity, high heat resistance, non-flammability, high strength and excellent electrical performance. In addition, polybenzyl ether has the advantages of wear resistance, non-toxicity and pollution resistance. The dielectric constant and dielectric loss of PPO is one of the smallest varieties in engineering plastics. It is almost unaffected by temperature and humidity. It can be used in low, medium and high frequency electric fields. The load deformation temperature of PPO is above 190 C, and the embrittlement temperature is - 170 C.
Pure PPO material has the disadvantages of poor melting fluidity and high price. The products sold in the market are all improved products with excellent comprehensive properties.
application
PPO plastics are widely used in: electronic and electrical: can satisfy the humidity, load, high temperature conditions with excellent electrical insulation, the use of the preparation of tuning film, coil core, microwave insulation, shielding sets, high-frequency printed circuit boards, a variety of high-voltage electronic components, television, computers, fax machines, copiers. Case and so on.
Automobile industry: suitable for dashboard, window frame, shock absorber, pump filter, etc.
Machinery industry: used as gear, bearing, pump impeller, blower impeller blade, etc.
Chemical industry: used to make corrosion-resistant parts such as pipes, valves, filters and submersible pumps.
Main tasks
The main task of China's plastic packaging industry is to develop new plastic forming equipment, gradually narrow the gap with foreign manufacturers, and compete with them in the market. Plastic packaging enterprises should change the way of enterprise development. They should stand at a new starting point to examine and solve the above contradictions and problems. Under the guidance of scientific development concept, they should change their development concept, strengthen independent innovation, enhance market awareness and effectively promote enterprise development.
Europe and the United States are the most developed countries in the plastic packaging industry in the world. They attach great importance to the research and development of advanced packaging machinery. According to Luo Baihui, secretary-general of the International Association of Mold and Hardware Plastic Industry Suppliers, packaging machinery in Europe and the United States has many varieties and advanced equipment, but in order to adapt to the competition in the international market, they are also constantly developing and developing more advanced plastic packaging machinery and equipment.
Under such circumstances, China's packaging machinery industry enterprises should adhere to the "going out" development strategy and actively expand foreign markets. Luo Baihui pointed out that domestic packaging machinery enterprises should adopt offensive operation, actively participate in the cooperation and merger among international and even cross-industry enterprises, through overseas investment and acquisition of foreign enterprises, digest and absorb their advanced technology and realize localization as soon as possible, so as to enhance our packaging machinery industry. The international status of the industry.
The vigorous development of processing services has stimulated the strong market demand for packaging machinery, which provides good business opportunities for Chinese packaging machinery suppliers. In the competition with European and American enterprises, China's packaging machinery enterprises have begun to emerge. China is the largest plastic production base in the world, but the plastic packaging machinery industry upstream in the plastic packaging industry is basically monopolized by imported equipment.
I. General Situation of Plastic Packaging Material Industry
After more than 20 years of development, plastic packaging materials in China have become one of the fastest growing areas in the plastic industry, occupying an important position in the packaging market and playing a positive role in the construction of the national economy. In 1980, the output was only 191,000 tons, with an output value of 3 billion yuan; in 2002, the output reached 4.01 million tons, with an output value of 68 billion yuan, accounting for 27% of the total output value of the packaging industry of 250 billion yuan. In 2004, the output of plastic packaging products reached 634.13 million tons, 1513% year on year, and the output value reached 92 billion yuan, accounting for 28% of the total output value of packaging industry. In 2004, the export volume of plastic packaging products reached 106.51.53 million tons and imported 16.94 million tons; the export volume of plastic packaging products reached 12.517.6 billion US dollars and the import volume reached 6.614 billion US dollars. The top three provinces in plastic packaging production are Guangdong, Zhejiang and Jiangsu, accounting for 26%, 21% and 11% respectively.
The equipment level of the industry has been continuously improved, some of them have reached the advanced level of developed countries, and a number of new products, new technologies and new materials have emerged. The market demand has grown rapidly, the application has been extensive and the development has been rapid. The average annual growth rate is 12%, which is 14.2% higher in 2002 than in 2001. Composite packaging substrates overcome the situation of long-term import of biaxial stretching films, and now export films at about 300,000 tons per year, generating foreign exchange of US$3 billion. There are more than 8000 enterprises of plastic packaging materials in villages and towns, including 2240 in film manufacturing, 4300 in silk and rope knitting products, 500 in foam plastics, 679 in packing boxes and containers.
The road of rapid development in 23 years is the road of reform and opening up, the road of socialist market economy, the road of hard work and entrepreneurship for all workers in the industry, especially the rise of private enterprises. Jiangyin Shenda Group and Zhejiang Dadongnan Plastic Group, which developed from thousands of yuan to more than 1 billion yuan, have all gone through difficulties and tortuosities in the market. The leading enterprises that grew up in the field economy have become well-known large-scale private packaging enterprises at home and abroad, and a number of private entrepreneurs have emerged. The original small and medium-sized plastic packaging enterprises have also gained vitality through restructuring, asset restructuring and technological transformation. Foshan Fangfang Packaging Material Company and Foshan Dupont Hongji Packaging Material Company play an important role in the industry with a new look. In addition, the entry of foreign-funded enterprises has increased industry competitors, making domestic enterprises further feel the role of the competitive mechanism of survival of the fittest. Therefore, only by increasing strength, strengthening, improving quality and creating famous brands can we win the initiative in the competition.
CHARACTERISTICS OF PLASTIC PACKAGING INDUSTRY
1. The new type of polyester packaging is in the lead.
The most noticeable is the application of polyethylene naphthalate (PEN). This is a new type of polyester packaging material, which has good gas resistance, ultraviolet resistance and heat resistance. Market analysts expect that in the near future, PEN will enter the packaging field in large quantities, triggering another packaging revolution after PET.
2. New degradable plastics have attracted much attention.
With the implementation of international environmental standard ISO14000, people pay more attention to the new degradable plastics. Among them, the German company Basf introduced the degraded polyester resin, which is the product of ECOHEXD aliphatic glycol and aromatic dicarboxylic acid polymerization, and can be used in film production.
3. Enterprises vigorously develop metallocene plastics.
Metallocene polymers have many advantages, such as good processability, high strength, high rigidity and transparency, so they have attracted great attention and many new products have been introduced. Metallocene plastics will directly impact the market of PP, MDPE, LLDPE and elastomeric plastics. They are suitable for food packaging, pharmaceutical packaging, shrinkage film and sanitary products.
4. Foaming plastic tends to zero pollution.
In this respect, the extruded foamed PP sheet developed by Italian A-MUT Company is the latest development of foamed plastics products. It produces foamed polypropylene sheet (EPP) with fine micropore and uniform distribution by using MOH-TELL's high viscosity resin, high melt strength polypropylene (HMSPP), PP homopolymer and low ODP chemical foaming agent. Only 12.5% of foamed PP is HMSPP, which has great economic and environmental significance. Compared with similar products, this foamed plastic product has low density and can save 20% of raw materials.
The Position of Plastic Packaging Industry in National Economy
Plastics are the three most widely used synthetic macromolecule materials: plastics, rubber and synthetic fibers. Its application has penetrated into all areas of the national economy. Now the annual output of plastics in the world has exceeded 1. 600 million tons, however, there are still big differences in the consumption of plastic products in different fields. At present, the most widely used areas of plastic products are packaging industry and construction industry, in which packaging plastic products rank first, accounting for 30% of the total plastic products, nearly 10 percentage points higher than the total plastic building materials. Other applications have obvious advantages. As far as packaging materials are concerned, plastic packaging materials have far surpassed traditional packaging materials such as glass, metal and wood, ranking second only after paper products. As far as the speed of development is concerned, plastic packaging materials have surpassed other packaging materials and occupied the first place. It is self-evident that plastic packaging materials play an important role in the national economy. However, compared with other traditional packaging materials, plastics is still a rising star in a short period of time, and many of its potential advantages need to be exploited and utilized. As a new material, many shortcomings and limitations of its performance still need to be well recognized so as to avoid them in use. Therefore, it is necessary for us to introduce and evaluate plastic packaging materials objectively while engaging in plastic scientific research, production and application, so as to promote the further development of plastic packaging materials.
IV. MAIN VARIETIES OF PLASTIC PACKAGING MATERIALS AND THEIR MAIN FORMS
1. Main varieties of plastic packaging materials:
The packaging materials used for various commodities are usually used for one-time use. When the commodities are circulated from the production units to the consumers or used in the opening of the commodities, the packaging materials fulfill their mission to be recycled or disposed of as waste materials. Therefore, for packaging materials, first, they are required to have good performance, to be able to adapt to the needs of protection and promotion of commodities, and second, they are required to be as low as possible. In today's plastics, so-called general plastics, such as polyethylene and polypropylene, have the common characteristics of good performance, large production and low price. They are plastics. The preferred materials for packaging materials; secondly, general engineering plastics, such as thermoplastic polyester, which have larger production scale and better performance but higher price. As for the expensive special engineering plastics, although they have unique advantages in some properties, they are generally not used as packaging materials due to economic reasons.
< 1 > General plastics
Thermoplastics in general plastics have many advantages, such as balanced performance, convenient forming and processing, easy recycling and recycling of waste materials, low price of products, etc. They are widely used in plastic packaging materials. Main varieties such as: polyethylene and ethylene copolymer, such plastics include high-density polyethylene, low-density polyethylene, linear low-density polyethylene, ethylene, vinyl acetate copolymer and so on.
< 2 > Engineering plastics
In the field of packaging, thermoplastic polyester and polyamide are the most widely used engineering plastics. These two kinds of plastics have many similarities. At first, they are the raw materials of synthetic fibers and were studied and developed. Later, they entered the field of plastics because of their high strength and easy moulding. They became one of the main varieties of Engineering plastics, and then gradually used as packaging substrates.
The main characteristics of thermoplastic polyester and polyamide are oil resistance, high and low temperature resistance, oxygen barrier, carbon dioxide and nitrogen barrier, non-toxic and hygienic properties, so they are common substrates for barrier films. Composite films made of them can be used for cooking packaging, vacuum packaging, deoxygenation packaging and so on. As a composite film substrate, besides the above characteristics, nylon has outstanding puncture resistance. It is very advantageous for packages such as bone foods, but it is more susceptible to the influence of moisture in the air. In humid environment, the oxygen resistance of nylon decreases.
It is particularly worth mentioning yesterday that in recent years, with the improvement of thermoplastic ester production technology and the expansion of production scale, its price has obviously decreased. At the same time, due to the enhancement of people's awareness of environmental protection, waste is easily recycled by physical or chemical methods. Thermoplastic polyester products have doubled their value in hollow containers and thin films. In terms of products, it has developed rapidly.
In addition to thermoplastic polyester and polyamide, polycarbonate is also used as working plastics in packaging. The main characteristics of polycarbonate are high temperature resistance, high transparency and high strength. It is especially suitable for recyclable (repeated filling) hollow containers. At present, the practical products are mainly milk bottles and 25L purified water buckets. Because of the high price, other applications are rare.
< 3 > Other Common Packaging Plastics
It is worth mentioning that packaging plastics are also polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH), high acrylonitrile resin (PAN) and polyvinyl alcohol (PVA), which are known for their high barrier to non-polar gases such as oxygen, carbon dioxide and nitrogen. In addition, their oil resistance is outstanding.
2. Main forms of plastic packaging materials:
< 1 >Plastic Film
Plastic film usually refers to the thickness of 0. Flat and soft plastic products under 25mm
Plastic film is one of the most widely used plastic packaging materials. There are many kinds of plastic film. In addition to plastic film used in ordinary plastic packaging bags, there are many special varieties, such as liquid packaging film, shrinkage film, winding film, refrigerator fresh-keeping film, fruit and vegetable fresh-keeping film, surface protective film, kink film, etc., plastic thin. Membrane is mainly used to prepare various packaging bags. In addition, winding packaging, twisting packaging, surface protection and other packaging forms are more common.
< 2 > Household Packing Plastic containers
Household Packing containers are another kind of plastic packaging materials which can be widely used in comparison with plastic film. Household Packing plastic containers, hollow containers, turnover boxes, cups, plates, etc. Household Packing containers include hollow containers, turnover boxes, thermoforming cups and plates.
3. Textile bags
Plastic textile bags are one of the most important types of plastic packaging materials. At first, they were developed and applied as a substitute for hemp bags. Now their application scope has far exceeded that of hemp bags. They are mainly used for packaging solid commodities, such as cement, grain, salt and a variety of chemical raw materials.
4. Foam plastics and other plastic packaging materials
Foam plastic products are an important branch of plastic products. Its main characteristics are shock absorption, shock protection and thermal insulation. The application of foam plastic products in packaging is not only the foaming turnover box mentioned above, but also the protection of various household appliances, electrical instruments and chemical reagents. Shock packaging, product form has boxes, boxes, gaskets, etc. There are many kinds of plastic packaging materials, which can be enumerated. More importantly, plastic packaging belt, tie rope, plastic mesh and so on can also be cited.
V. Development Trend of Plastic Household Packing Industry
1. Development Prospect of Plastic Packaging Materials in the World
From the international point of view, although plastic packaging materials have been subjected to serious challenges from environmental problems, the data published in recent years show that plastic packaging is still one of the fastest growing materials in the packaging industry. According to the statistical analysis and forecast of Freedonia Group, the average growth rate of paper and plastics in packaging industry in the United States was 2.4% from 1996 to 2001, of which 1.6% was cardboard and 3.4% was plastics. According to the statistical data of "Packaging Technology" in Japan, the sales of plastic packaging materials in Japan accounted for 15.4% of the total sales of all kinds of packaging, still ranked second after paper and cardboard (57.5%), the rest were 12% of metal, 9.2% of glass, 5.2% of wood products and 0.7% of other products.
According to the above-mentioned development and forecast of the United States, Japan and China, it can be clearly seen that plastic packaging materials will continue to grow steadily in the 21st century, still full of vitality 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 more and more important. Resources and energy are becoming more tense. Plastic packaging materials will face new opportunities and severe challenges. In order to meet the requirements of the new era, plastic packaging materials are required not only to meet the increasing demands of market packaging quality and efficiency, but also to meet the requirements of the new era. Saving energy, saving resources, easy to recycle or be easily degraded by the environment is the starting point of technology development. For this reason, plastic packaging materials are developing in the direction of high function, multi-function, environmental protection adaptability, new raw materials, new technology, new equipment and widening application fields.
2. Development Trend of Plastic Packaging Materials in China
<1> High barrier and multi-functional films are developing to a new level of Technology
Soft plastic packaging materials with high barrier and multi-function have become the focus of development in recent years. In 2002, a number of new products and technologies emerged, including high permeability, multi-functional fresh-keeping film and aseptic packaging film. The original composite film is developing to a deeper level. Bag making and printing technology has reached a new stage. It has entered the era of "color revolution". The color systems of offset, gravure and flexography have been developed in the whole industry, which has promoted the deep development of soft plastic packaging materials. Anti-counterfeiting packaging film is developing rapidly, which is called the flower of soft plastic packaging. Especially the successful development of anti-static packaging film is of great significance. Electronic products, including electronic components, integrated circuits and printed circuit boards, suffer serious losses due to electrostatic discharge damage. The antistatic packaging films used in our country are basically imported from the United States and Japan. The products are opened by the 59th Research Institute of Chongqing Weapons Industry, Shunde Credit Company and Zhongshan Dongsheng Company. Successful, and has been put into production.
The development of multi-layer co-extrusion 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 daily necessities packaging, cosmetics packaging, food packaging and household appliances packaging. On the other hand, with the increasing voice of environmental protection, how to minimize the production of garbage under the premise of meeting the packaging function, so as to present the development of packaging film and packaging container towards lightweight and thin-walled direction, high barrier film mainly composed of dry process, which is easily polluted by the discharge of adhesives and solvents in the production process. The development of co-extrusion packaging film has the advantages of low investment, low cost, strong adaptability and easy operation. The proportion of dry composite membranes is still unreasonable, accounting for 6% in the world. At present, our co-extrusion technology develops very fast. According to relevant data, co-extrusion packaging film in developed countries accounts for 40% of the total flexible plastic packaging materials, while we have only made new progress. At present, in addition to Dalian Liaonan Oriental Machinery Co., Ltd. superposition head technology has been promoted and applied, domestic co-extrusion blow molding technology and equipment has passed product identification and started mass production. The five-layer co-extrusion high barrier film blowing machine developed by Guangdong Jinming Plastic Equipment Company has passed the appraisal of new products. The development of co-extrusion packaging film will change the product structure of multi-functional film, which is suitable for liquid food, milk, fresh meat and other food packaging.
The development of co-extrusion technology also meets the needs of industrial packaging. Qinchuan Machinery Company has successfully developed a six-layer co-extruded plastic hollow container for the production of automotive fuel tanks with a maximum volume of 200 litres. The machine adopts new technology to ensure 100 control points of parison wall thickness, so that the vessel wall thickness is uniform. Electrical, hydraulic and pneumatic stability without oil leakage. The feeding system ensures continuous and stable feeding of six extruders. With the development of automobile industry, the market of multi-layer fuel tank will have greater development space.
"3" Fresh-keeping Packaging Film for Vegetables and Fruits has a broad market prospect
In 2000, China's total fruit output reached 71 million tons and vegetable output reached 300 million tons. It is the world's largest producer and seller of fruits and vegetables. However, about 30% of the fruits lost during storage, transportation and sale. Among them, improper packaging is one of the causes of fruit decay loss. In the competitive market conditions, the role of packaging is becoming more and more important. Because fresh fruits and vegetables are a living thing, they are still breathing after harvesting and have a vigorous life. To sustain one's life by consuming one's own nutrients and water. If the fruit is not preserved in time after harvest, it will lose water and wilt in less than 3 to 5 days (strawberry, litchi, longan, cherry, etc.) and more than 10 and a half days (peach, plum, grape, etc.) and lose its edible value due to deterioration and decay. Although the physiological properties of different fruits are different, discoloration, water loss, ambiguity 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 issue 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 selection of film bags mainly considers the following factors: the suitable gas permeability, and the appropriate concentration of O2 and CO2. Adding ethylene gas absorbent. Adsorption of ethylene released from fruits can slow down the respiration of fruits and keep them fresh.
"4" The market of plastic beverage bottles is lurking with attractive business opportunities
According to the survey, in 2002, China's beverage production was nearly 23.84 million tons, with an annual growth rate of more than 20%, while the proportion of PET bottles in carbonated beverage packaging accounted for 57.4%, and the market prospects were promising. At present, the enterprises with large production of PET polyester bottles in the industry are Zhongfu Group in Zhuhai and Zijiang Group in Shanghai, which have 30% and 20% market share of domestic PET bottles respectively. Zhuhai Zhongfu Company is the earliest PET bottle manufacturer recognized by Coke and Baile. In 2001, there were 3.2 billion PET bottles, including 700 million hot filling bottles, with sales reaching 2.34 billion yuan. It has more than 30 factories all over the world: Shanghai Zijiang Group has developed rapidly in recent years, and its holding companies in various places have developed to 15, occupying Wuhan. In Zhengzhou, Tianjin, Changchun, Kunshan, Chengdu and other markets, 120 million new PET filling bottles with annual production have been put into production. In 2002, factories were invested in Shanghai, Guangzhou, Chengdu and Beijing, and the production capacity of hot filling bottles reached 485 million.
"5" Medicinal Packaging Material has become a new development hotspot
Pharmaceutical solid dosage form packaging has broad prospects for development: according to relevant statistics, the annual output value of pharmaceutical packaging in China is about 15 billion yuan. At present, pharmaceutical packaging is becoming a branch of packaging field in China. With the reform of China's medical system and the increase of drug types, the form of drug packaging is also changing. From the original paper bag packaging, plastic bag packaging, glass bottle to the present polyethylene bottle, polypropylene bottle, polyester bottle, aluminum plastic packaging, strip packaging. It has reversed the backward situation of drug packaging.
Plastic packaging for infusion has become a new development hotspot: 90% of infusion in China is packaged in glass bottles and the actual production of soft plastic packaging is less than 200 million bottles (bags). At present, most of the foreign infusion agents are packaged in high quality plastic bottles or bags. With China's accession to the WTO, the number of foreign-funded hospitals has increased and the demand for them has increased. The per capita infusion volume in developed countries is 333 bottles, which is undoubtedly a market space. At present, the global application volume for infusion is 12 billion bottles, while China's infusion volume is only 3 billion bottles. Therefore, since 2001, rebuilding, expanding and new infusion packaging production has become a "hot spot", plastic packaging industry is no exception.
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