Stretch film (LLDPE)market analysis China Stretch film packaging was first developed in Europe and America began in the 1970s used as a packaging technology, evolved from the shrink-wrapping. China from the late 1980s, the development of stretch film (hereinafter referred to as stretch film) and the stretch wrap packaging equipment, the early 1990s with the rapid economic development, stretch film used widely, demand is growing rapidly. Stretch a wide range of applications, mainly for industrial packaging (such as household appliances, machinery, chemicals, building materials, etc.), agricultural packaging (such as corn stalks, alfalfa silage, etc.), household and supermarket use of packaging (food, fruits, vegetables so fresh), etc. Stretch film (LLDPE) packaging machinery into packaging and manual packaging, is flexible at room temperature will be wrapped around pieces of stretch film, wrap and seal in the end to a packaging method. As the stretch wrap packaging without heating, energy consumption, shrink wrapped only 1 / 20. Stretch Wrapping individual items can be bundled package can also be used for pallet packing like a collection of packages that can save energy, reduce packaging costs, reduce transport losses and improve logistics efficiency purposes, is "15" to improve packaging and transportation of goods plan. High tensile strength with degree of stretch film, good self-adhesive, transparent, reliable cleaning performance, the relative density of light, toughness, ease of use features, the future direction of development of domestic packaging. Domestic production of stretch film manufacturers now have more than 150, with a total capacity of 180kt or more. In 2001 the domestic stretch film production reached 60kt, demand is about 78kt. As China's packaging industry and the growing volume of foreign trade, agricultural preservation, and winding the development of livestock forage preservation, and family and supermarkets use the popularity of stretch film, stretch film future will be increasing demand. Stretch film is expected in 2005 demand will reach 130kt, 2010 years will reach 250kt. Stretch film (LLDPE) using extrusion processing technology, its main raw material for polyvinyl chloride (PVC), low density polyethylene (PE-LD), ethylene - vinyl acetate copolymer acid (EVA), linear low density polyethylene (PE-LLD) polybutadiene (PB) with a viscoelastic polymer such as,, present, mainly PE-LLD, PE-LD, in order to composite film-based. The main equipment for the extruder and the corresponding auxiliary equipment, such as batching, mixing, feeding systems, thickness measurement system and take-up system. There are two main production processes, namely, casting process and the blow molding process, advantages and disadvantages, the production of films and performance of the necessary equipment such as shown in Table 1. Table 1 blow molding and film casting process to produce the desired device performance and contrast
Cast performance blow molding process Good thickness uniformity is poor Very high elongation at break Transparency is generally high Device-grade, low high STRETCH FILM Production is generally high Blow molding processes generally use single or multi-layer co-extruded blown film equipment; casting process is used casting production lines. Multi-layer co-extrusion blow molding equipment is imported (usually three), can produce the maximum film width up to 2m, made single or double blow molding equipment to produce the maximum film width of 0.5m or 1m. Italy DOLIC (Nextrom company) made a single cast production line annual production capacity of up to 7kt, line speed up to 500m/min, three-layer co-extruded stretch film is special equipment for more advanced equipment is currently one of the world. In addition, the Austrian company SML Germany in October 2004 Orbita Films delivered a stretch film production line. The equipment consists of five sets of extruder, 2500mm wide can be produced per hour, five-story stretch film 2000kg. According to the width of the different production lines, the maximum amount out of 4500kg / h. The production line adopts die packet system, reducing the film's neck, to ensure stable production at high speed films, is the world's most advanced and largest output of cast film production line. China's current foreign-funded enterprises and joint ventures, mostly imported equipment, large production capacity, import production line speed, high degree of automation, high yield, good quality, but large amount of investment. An imported production lines need to invest thousands of yuan, the production capacity of 5-7kt / a; and domestic equipment production line investment of 20 million, in-line production capacity is generally 200-300t / a, the annual production capacity is generally 100-150t. Since domestic production is small, the adjustment of product quickly, can be more variety, small batch production, is currently the largest in the country, the competitiveness of a strong, but the appearance of the product of poor quality, thickness uniformity is poor, the operating rate is not high, average 50% -60%. At present, three co-extruded cast stretch film technology to production-based, film thickness 20-50μm. The North American stretch film above the standard for the five-story, nine facilities have been put into industrial production; and is developing ten layer and 14th stories of production equipment and technology to produce ultra-thin film 0.1μm. Or less for single-layer multi-layer composite than good, in the same intensity can reduce the film thickness, both to save resources and reduce costs. Film thickness 12-25μm, 20μm of the majority of cast stretch film for the three co-extruded stretch film, so domestic production technology there is still much room for improvement. 2 Stretch Film (LLDPE) production status of domestic 2.1 Overview of Supply China's use of stretch film began in the late 1980s, its industrial production around 1993, the first production of the production capacity is generally 500-700t / a, 1998 years after the introduction of large-scale equipment, in-line annual production capacity of 5000 - 7000t. China imported Italian stretch film production line over 10. Domestic producers to reach 150, most of the production line is made of small production lines, the majority of enterprises are concentrated in East China (Jiangsu, Zhejiang) region of Guangdong Province, Shandong Province and Liaoning Province and other places. It is understood that only the eastern region had more than 100 production lines in Guangdong Province has more than 30 production lines, Shandong Province, northeast region have more than 10 production lines. Stretch film is expected to total production of 100kt in 2005, of which 55% of industrial packaging stretch film around.
2.2 Production Company As China's major stretch film production company, and the smaller, low level of domestic vicious stretch film market competition. Low-profit products, most enterprises operating rate of serious shortage of enthusiasm for production is not high, with users dispersion, with less, making the cost of sales is high, which affected the use of stretch film to promote, not conducive to the collection of packaging development.
2.3 Production capacity and output Stretch film production from the early 1990s to 2000 1kt more quickly the 40kt, while the 2005 estimated production capacity of 180kt / a, production reached 100kt, the manufacturer has developed into more than 150. 1995-2010, China's production capacity and production of stretch film analysis and forecast shown in Table 2.
Table 2 1995-2010 stretch film production capacity and output in China Analysis and Forecast Tab.2 Analysis and forecast for the capacity and the output of wrapping films in China from 1995 to 2010
Project average annual growth rate /% 1995-2000 2000-2005 2005-2010 Capacity / kt 31.9 12.5 14.9 Yield / kt 31.9 20.1 18.1 Operating rate /% - - - 2.4 the main raw material supply For the production of metallocene polyethylene stretch film of the polymer (mPE), PE-LLD, PE-LD, EVA, PVC, in special cases, including polypropylene copolymer. Various proportions of these ingredients can be blended or coextruded to obtain the most desired film properties. PE-LLD because of its excellent tensile strength, elongation at break, resistance to shear and puncture resistance and welcomed by all sides. Most high-performance stretch films contain PE-LLD. Traditional PE-LD is the second commonly used resin, but the amount is limited. EVA has very good tensile properties, usually 3% vinyl acetate content of 12% of EVA. Compared with polyolefins, PVC stress remain poor, 16h after the retention of polyolefin is about 65%, while only 30% of PVC. China has almost no use of PVC stretch film. Domestic production of stretch film is currently the main raw material is PE-LLD, PE-LD, EVA and so on. PE-LLD domestic product mostly butene copolymer, can not meet the performance requirements of industrial stretch film, stretch film and can be used for the hexene or octene copolymer PE-LLD Compound, domestic enterprises can be produced very little. Tianjin United Chemical Co., Ltd. hexene copolymer product DFDA-9030 in November 2004 by the Tianjin Science and Technology Commission of the scientific and technological achievements, comprehensive technical performance has reached international advanced level, to fill the gap. In addition, the Qilu Petrochemical and Maoming Petrochemical Co., Ltd. QLLF05's 6080 Stretch Film Compound (are hexene copolymer) is also a successful trial production, and a small amount of the market. Yangzi Petrochemical Co., Ltd., 7001 hexene copolymer products industry is still at the pilot production phase. More upscale octene copolymer products in China is still blank, metallocene product is still in development and testing stage. High-grade stretch film dedicated PE-LLD still rely heavily on imports. Major overseas suppliers: the United States DOW, EXXONMOBIL, PHILIPS, NOVA, Japan's Mitsui Chemicals, Japan, Idemitsu, Japan's Ministry of Kosan word, rattan and other big companies in Malaysia, China's annual import volume of about 30kt. PE-LD can supply domestic, major manufacturers have Daqing Petrochemical, Qilu Petrochemical, Shanghai Petrochemical, Yanshan Petrochemical, Maoming Petrochemical, Yangzi - BASF and other petrochemical companies; EVA domestic production is limited production in May 2005, the Yangtze - Bath husband's PE-LD device can be mass, due to price than PE-LLD and PE-LD is much higher, less domestic applications. Table 3 China's market for stretch film production part of the PE-LLD resin and its suppliers. Table 3 parts for the production of stretch film grade PE-LLD and its suppliers Tab.3 Some PE-LLD resins being used to produce wrapping films and their suppliers Grade polymer resin supply company 2045,2047,2049,2247
Tianjin Union of hexene copolymer PE-LLD QLLF05 Qilu Petrochemical hexene copolymer PE-LLD 6080 Maoming Petrochemical hexene copolymer PE-LLD
STRETCH FILM ( LLDPE ) China's petrochemical enterprises in the development of high-grade stretch film Compound Compared with foreign counterparts, there are still some gaps, production technology and efficient comonomer polymerization catalyst preparation is the key to the problem constraints. Domestic petrochemical enterprises should increase research and development, early stretch film processing for the domestic enterprises to provide high-quality, high-grade resin material. 7 x. p $ E8 L3 m (Z (} 2 K-w. i1}) b 3 status of the domestic demand for stretch film 3.1 Requirements Overview 1 h3 u! [% r * N5 K, o6 U (~ According to the survey, China's current demand for stretch film around the 130kt, mainly based in industrial packaging film, the annual demand in 70kt or more. Household plastic wrap and supermarkets increased rapidly with the winding, the current demand in 40kt or so. Other agricultural grass wrapped plastic wrap has rapid growth, estimated 2005 demand for agricultural stretch film in 20kt or more. At present, several major consuming regions stretch film: Shanghai area (including Zhejiang, Jiangsu Province) in the amount of industrial stretch film is 25kt or more; Guangdong Province 15kt above; Tianjin as 3kt; Beijing as 2kt; Shandong Province of 2kt ; Dalian is 1kt more. Specifications for different industries have different requirements for stretch film, mainly in the thickness and width, the details shown in Table 4. Table 4 different industries specifications requirements for stretch film Tab.4 Specifications of wrapping films for different applications
stretch film ( LLDPE )Industry, film thickness / μm width / mm with length / m Paper 20-50 uncertain 500-1800 Cans industry 20500500-1800 Ceramics 201000500-1800 Profiles 20500500-1800 Tires 17 or 35 50-80500-1800 Plate protective film 652100500-1800 Forage Stretch Film 2575 or 250500-1800 Home and supermarkets with plastic wrap 15-2530020-100 3.2 the area of demand 3.2.1 Strechf film ( LLDPE )Industrial Packaging: A wide range of industrial products in China, a large amount of output and exports, which stretch film in a wide range of industrial applications, is currently in the chemical, building materials, food, electronics and other industries used more often, the main raw material used for the PE-LLD. Rapid growth in exports led to the rapid development of packaging industry, especially in the collection of packaging, many companies use stretch film packaging of their products. According to the understanding of the enterprise, is currently exported to the United States have been using a collection of packaging stretch film packaging, the use of stretch film packaging is a big trend, the market will gradually shrink film shrink. Use of stretch film packaging business mainly export-oriented enterprises - foreign-funded enterprises, joint ventures, large state-owned enterprises, such as the Canon Office Equipment Co., Ltd. Dalian, Dalian Sanyo Compressor Co., Ltd., GE, Haier Group Corporation all use a certain amount of The stretch film, the amount of each enterprise in membrane between the 20-100t, a large number of domestic small and medium enterprises also use stretch film packaging, the amount of each enterprise with the membrane between the 5-10t. In 2004 the amount of industrial packaging stretch film 64kt, 2005, is expected to reach 70kt, 2010 year more than 150kt. General industrial enterprises each with annual consumption of stretch film very different, less a few tons, more than 100t. Stretch film packaging in the early stages of development of China's multi-port terminals for export packing of goods, but because fees are too high, the port used stretch film packaging gradually transferred to the plant, that is packaged at the factory and then shipped to ports for export. Plants generally use a large amount of Wrapping Machine Packaging, a small amount of manual packaging is commonly used. Wrapping Machine localization of the past few years, low cost, but also makes the stretch wrap packaging plant from rapid transfer to the port terminals. So, now the port membrane volume has very little stretch film packaging also makes the user more current, and scattered small amount of each enterprise. Other areas, such as fresh grass winding, household and supermarket use faster film growth, especially in the supermarket with the film. At present, such as poor packing of goods caused economic losses of over $ 14 billion per year. Which occur due to improper transport package damage during transport accounts for about 80%. Caused by the loss of goods during transportation the most common form of damaged goods, loss, deterioration, leakage pollution. With stretch film packaging can significantly reduce the incidence of such losses. According to statistics, in Europe and developed areas, the use of stretch wrap packaging films accounted for 67% of the market. The main competitors stretch wrappers, shrink packaging film is expected to shrink packaging films before 2007 will be 2.3% per year rate of decline, will seize the stretch wrap packaging shrink packaging market. The entire European market demand for the stretch wrap packaging films 1500kt, the United States in 2000 had reached 1600kt, Wrapping machine usage has reached more than 100,000. Wrapping can be used to effectively protect the goods and merchandise, rain, water, moisture, improve value-added goods, more than 50% reduction in packaging costs. Wrapping Machine market across the country use less than 4000, the national film industry in the total package wrapped in 60kt or so. Compared with developed countries, the type and amount of stretch film there is a big gap. As of the end of 2004, China's coastal stretch film packaging market in the initial formation of the western region is still basically in a "blind spot" status.
3.2.2 Agricultural Packaging of stretch film (LLDPE ) China's agricultural grass wrapped with cling film began in 1995, the first trial in Inner Mongolia grass wrapped with plastic wrap, stretch film used a total of 3.5t, save 766t pasture for six months, with good results. 1998 in Inner Mongolia and Heilongjiang application. With the rapid development of animal husbandry in China, continue to adjust planting structure, the western development strategy and the further implementation of the national ecological construction plan with the gradual implementation, as well as domestic and international market demand pastures, cultivated area will gradually expand. However, subsequent storage has become increasingly prominent. Because traditional methods of silage close enough, too much oxygen in straw, silage is not ideal. With the silage fermentation mechanism of modulation, the invention of grass silage stretch film wrapping. After bundling and wrapping up the grass can be stored long-term stability can be stacked in the field to save 1-2a, and therefore has considerable social and economic benefits. In northern China, formerly a large number of cows, sheep and other winter and spring, most of the feed with hay, cattle and sheep, etc. is not conducive to normal growth; and the use of fresh pasture feeding, milk production increased 20%, improve the rate of long-fat beef cattle 800-1200g / d, greatly improving the quality and pastoral farming income. Over the past few years, China's annual fodder and silage ammoniated at 6000kt above, if in the future instead of using fresh grass, the demand can be increased to 10000kt, the storage required per ton of forage preservation packaging film about 5kg, you need to wrap plastic wrap 50kt or more. In support of the relevant state ministries and commissions under the Schroders Group, Hebei Baoshuo U.S. company introduced the company's annual 4kt Battenfeld grass stretch film project, which uses the most advanced technology that has successfully put into operation in 2004, This indicates that China grass silage stretch film to rid itself entirely dependent on imports. 2005 is expected to pasture and other agricultural stretch film membrane volume (such as vegetables, fruits, fresh) will reach 20kt, 2010 will reach more than 50kt. The main raw material used in these Stretch resin PE-LLD, mPE and PE-LD. 3.2.3 Household and supermarkets with packaging China's domestic demand for plastic wrap to increase year by year. Self-adhesive stretch film is widely used in food, fresh vegetables and fruit packaging, packaging that is strong, clean, and can play a waterproof, dust pollution and preservation role. According to statistics, about 3.4 million households in China, including 230 million rural households, accounting for 67.6%. In 2001 the number of urban residents have refrigerators to 126.98 million units, more than 100 units per household, while rural residents in 2001 refrigerator ownership is only 24.7 million units, so the amount of room for growth in rural areas with large refrigerator. Urban residents currently use the wound from the mucosa of each refrigerator is relatively small, but with the improvement of living standards of urban and rural residents, I believe will rapidly increase. In addition, in recent years the supermarket wrapped from mucosa with significantly increased significantly. 2001 home and supermarket plastic membrane to 25kt, 2005 years to reach 35kt, 2010 is expected to reach 66kt. Home and supermarkets with fresh packaging from mucosa mainly PE-LD/PE-LLD, there are some enterprises processing with mixing a small amount of EVA. 3.2.4 Stretch Film Import and Export Stretch film is used in China's first large port, as the collection of export products packaging, stretch film packaging has developed rapidly. Stretch the early 1990s, completely dependent on imports, the annual import volume of about 2kt, 1993, China has begun to stretch film production, annual output of only 1kt so. According to the survey, domestic annual production of stretch film 2001 60kt, 20kt or so for the import and export volume of 5-8kt, Shanghai, Zhejiang, Guangdong and other foreign companies or joint ventures as well as some exports. China Stretch source of imports with the United States, Japan and Italy. At present, China is still a net importer, net imports of 30kt per year around. 4 domestic demand analysis and forecasting: Currently exported to the United States have been using a collection of packaging stretch film packaging, the use of stretch film packaging is a big trend, and are instead part of the original shrink film market. With the growing field of stretch film applications, such as fresh grass, agricultural preservation and other areas of China has shown a bright future, and thus the amount of stretch film will have a faster growth. Stretch film China's annual growth rate from 2001 to 2005 about 15% by 2005 demand will reach 130kt, the average annual growth rate in 2006-2010 is expected to reach 16% -20%, demand will reach 270kt or more. China's polyolefin stretch film needs analysis and forecasts shown in Table 5. Table 5 stretch film consumption in China 1995-2010 Analysis and Forecast kt Tab.5 Analysis and forecast for the consumption of wrapping films in China9 y3 d * P! n / e7 ~) T-n8 A6 r Demand category 1995 2001 2002 2,003,200,420,052,010 The amount of industrial membrane 104,552,576,470,154 The amount of agricultural film 181,113,162,050 The amount of household film 3.5 121314151726 Supermarket shopping malls with the amount of membrane 1.5 131618202340 Stretch of the total 16 7,891,102,115,130,270
With the development of new materials, such as metallocene material provides a higher tensile strength and tensile rate, and film thickness decreases, which reduces production costs. From 1975 to 2003, the stretch film of average thickness has been reduced from 30μm to 20μm, while the tensile rate from 50% to 300%. Current European and American markets in the developed stretch film thickness is generally between 12-50μm.
4.1 Wrapping silage prospects Currently 20% in European countries using grass silage stretch film wrapping method, even in Sweden, 40% utilization rate. Wrapping silage grass silage law has become the development direction of our country, its potential is huge market demand, but also manufacturers of packaging film is very promising project.
4.2 the rapid development of container transport The rapid development of container transport will facilitate collection of new packaging technologies, especially stretch wrap packaging to develop new technologies faster and higher. As the use of stretch film greatly increased the speed of collection of packaging and reliability, safety, convenience, energy conservation and packaging costs, etc. There are many advantages, which is widely applied, stimulated the demand for stretch film. 4.3 Atmosphere Packaging promising Large-scale preservation, and packaging for long-distance delivery (plastic bags, liners, pallet covers, etc.), household plastic bags, including frozen food and non-refrigerated foods (fruits, vegetables, meat, fish, bread, cakes, etc.), Garbage bags (with odor control effect), anti-aging and insect food packaging, food packaging and other microwave ovens are huge stretch film market. With the stretch wrap packaging film application development, the demand is also growing. \ 5 Conclusion Stretch as a new packaging material, application in China in the ascendant, I believe that as technology continues to progress, synthetic resin and film processing equipment and technology gradually improved, and its application of the brilliant prospects. Hereby submit the following proposals for the relevant departments and enterprises refer to: / B (D0 G7 \ 2 @. J1 H # Q4 A # x
(1) the national authorities to increase efforts to promote the use of stretch film, to develop practical standards for product quality and packaging specifications, and guide the domestic market and the health-related enterprises to take the road of healthy development;
(2) domestic petrochemical enterprises to increase polymerization catalyst and comonomer development efforts to produce high-grade, high-quality, low cost of stretch film special material, to replace imported materials;
(3) Stretch film ( LLDPE )processing enterprises should learn from foreign advanced production equipment and technology to improve the quality and grade stretch film, and establish industry self-regulation system, and consciously safeguard the market order, prevent vicious competition, and resolutely put an end to counterfeit products into the market.
