Means a soft plastic packaging plastic film packaging, we thickness 0.2mm or less is called the planar plastic film to the planar article referred 0.2-0.7mm sheet, and the article referred to the planar 0.7mm sheet. At present, four major packaging materials, namely paper and paperboard, plastics, glass, metal, plastic ranked second, accounting for almost half of the plastic film material in a plastic bag.
This issue we will open a special "soft plastic film theme," focuses on the production process, the development trend of domestic and foreign films and so on.
Plastic packaging applications is a leap in the history, it has a light, then, gifted American four advantages. Since its position in the packaging remains irreplaceable. In the United States, in 1998 the amount of packaging consumption over 121.2 billion US dollars, of which plastic packaging materials for $ 39.7 billion, accounting for 32% to second place. In Europe, the 1996 packaging consumption amounting to about $ 110 billion, accounting for 29% of plastic packaging (the other metal, glass, wood, etc.). In China, the 2000 National Packaging output value reached 220 billion yuan, ranked second in the plastic packaging (the first one is the paper) in all packaging materials, accounting for 32.3%.
According to foreign media reports, in recent years, due to the implementation of a powerful combination, cross-border cooperation initiatives such as plastic packaging industry in the world has a new development, packaging materials, packaging products output steady growth, new packaging materials, new processes, new technologies, new products continue to emerge. The world of plastic packaging products appeared the following characteristics: a new type of polyester packaging dominate; new degradable plastics concern; enterprises to develop metallocene plastics, foam plastics to zero pollution.
Several film market trends
One, BOPP film
It is well-known consulting firm AMI special report on "Global BOPP film the latest market trends," the 2001 World BOPP film market for the first time more than 300 million tons, nearly 25 years of BOPP film from beginning to replace cellophane, development up to now has rapidly become a very important flexible packaging materials are used to replace cellophane fast food, snacks, tobacco packaging, and continue to enter new areas of application, such as pasta, baked goods, packaging and labeling bouquet.
During most of the 1990s, the average annual growth rate of industrial BOPP film amount up to 10% of its production capacity is also growing, resulting in an area of surplus production capacity. Despite the strong industrial demand, but production plant profit decline, because the production plants are trying to maintain market share and trying to enter new fields of application. In this case, PET (polyester) film performance in Asia and Latin America, particularly excess capacity, PET film and BOPP film to keep prices low for the market.
Some of the leading manufacturer trying to adjust the structure, the size of the apparatus become more streamlined. Due to the current competition between companies intensifies the world, wants to expand the scale of production plants to ensure that the advantages or to exit from this business, which provides an opportunity for new entrants so that they can buy companies to enter the market, such as Dow Chemical Company purchased Moplefan company. The past 10 years, some important BOPP film manufacturer does undergone some changes, such as Exxon Mobile Chemical film (former Mobile plastics) Long-term has been the world's largest BOPP film production plant, but the market share of 12.5 percent from 1990 decline to 7.7 percent in 2001, while Italy Vifan Group 10 years ago a small scale, by now in Italy, the United States and Canada, the new device to become the world's second largest manufacturer of BOPP film. More than 200 existing BOPP film production plant in the world, nearly three years the number of producers has not changed substantially.
BOPP film production capacity where the largest in Asia (especially China), the region's rapid increase in the number of small devices, applications for home appliances, capacitor film, with groups, labeling and packaging. China's potential market is very large, so the major manufacturers supplying the local or neighboring markets, with the increase of the manufacturer, they are also looking for export opportunities. At present, China exports BOPP film is very small, there is a considerable amount of actual annual imports of BOPP film. China will continue to be the next most active markets BOPP film production and consumption are ranking first in the world market. Average annual growth of demand for 2010 by more than 9%.
According to AMI expects 2010 to be China's annual consumption of 100 million tons, the global market is close to 5.7 million tons. In addition, the strong market growth in the region and the country as India, the Middle East and Eastern Europe, these regions consumer base is very small, and the market is relatively large and mature US, Western Europe and Japan, 2001-2010, the average annual growth rate of demand of 4% to 6%, suggesting that these regions BOPP applications has reached a very high level.
Second, the polyethylene film
Mastio & Company expects polyethylene film for dry food packaging to 2006 the average annual growth rate of 4%. Consumption in the field of polyethylene resin from 830 million pounds in 2001 to 2006 to 10 billion pounds. Polyethylene packaging materials for dry food consumption accounts for 27% of the total consumption of packaging materials market. Dry food packaging materials can be divided into four kinds of end-use markets: candy, snack foods, dried foods, cardboard lining. The proportion of dry food packaging accounted for the largest, accounting for 50% of total consumption. Followed by 25% of packaging cardboard lining, finally, the proportion of convenience foods and sweets.
Although candy packaging accounted for the smallest proportion, but its development is the fastest growth in 2006 of about 7% per year. Cardboard lining estimated average annual growth of 5%, while convenience food packaging is expected to grow by 4% annually. Although dry food packaging accounted for the largest proportion, but its development slowest growth in 2006 of about 3% per year.
Dry food packaging film development due to the following reasons: First, the rapid development of society. Today's popular lifestyle and demand for convenience foods is contributing factor dry food with a polyethylene film packaging materials development. Gaining popularity can be filled, easy open, easy to erect bag also contributed to the development of this market. Convenient bags with a zipper and has been widely used for the carriage of dry foods and convenience foods, such as nuts, crackers and other packaging. Candy and tuna are also gaining popularity for closable bags upright convenience foods. Barrier film for drying food is very important, because they make the products keep their freshness longer. Second, low-density polyethylene (LDPE) dominated. Although many dried food packaging material and a resin material layers need to ensure freshness and quality, low density polyethylene (LDPE) is the most common in the field of polyethylene resin applications. Low density polyethylene film, 50% of the total field of more than vinyl, because low-density polyethylene to provide strength, luster, softness and maximum transparency.
Third, nylon film
Due to freezing, distillation and other food processing base, nylon film market growth in Asia than in 2001 by nearly 20 percentage points, needs nearly 2 million tons of annual global demand for nylon film is about 100,000 tons, Japan occupies 3-5% the growth rate of about 40,000 tons, an increase of 5% in Europe, about 40,000 tons, and the steady growth in demand, while the Asian market demand, although less than 70,000 tons, but there are 15 to 20 percent growth, Chinese market, there are 30 percent of the annual demand growth rate of about 1 million tonnes. Therefore, the rate of market demand is very strong in Asia, driven by Asia, the future of the global annual demand for nylon film growth is expected to be above 10%.
Global development trends and new film
A water-soluble film
Water-soluble plastic packaging film as a novel green packaging materials in Europe, Japan and other countries are widely used in a variety of product packaging, such as pesticides, fertilizers, paints, dyes, detergents, water treatment agent, mineral additives, washing agents, concrete additives, photographic chemicals and chemical reagents and other horticultural care. Its main features are:
1. complete degradation, degradation of the final product is CO2 and H2O, can completely solve the problem of packaging waste;
2. Use safe and convenient, avoid direct contact with the user packages that can be used for harmful goods packaging;
3. good mechanical properties, and heat sealable, high seal strength;
4. With security features, can be used as the best weapon of quality security products, to extend the quality of the product life cycle.
Due to the environmental characteristics of water-soluble film, it has been developed by the world wide attention. Such as Japan, the United States and France have large volume sales of such products, like the United States and France's WTP GREENSOL synthetic chemical companies as well as Japanese companies, its users are also some well-known large companies, such as Bayet (Bayer), Henkel (Henkel), Shell (Shell) and so on.
In China, the water-soluble film market is on the rise. According to statistics, China's annual demand for packaging films accounted for 20% of plastic products, up to about 309,000 tons, even by 5% market share terms, the demand is also up to 15,000 tons per year. The current market price: US products for 13 to 17 yuan / ton, Japanese products from 20 to 25 yuan / ton, the domestic sales price of only 40% of the United States, with an average price of 60,000 yuan / ton, thus has a highly competitive price. With the social development and progress, more and more people pay attention to protect our environment for survival, especially in China's imminent accession to WTO, the developed world and the world of packaging increasing environmental requirements, and thus water-soluble packaging films in our country certain very broad application prospects.
Second, the black and white film
Black and white film composite packaging (Black / white film for packaging) became popular in recent years, a new packaging. In Japan and other developed countries because of its excellent sealing performance, the unique advantages of avoiding resist oxygen function, and is conducive to storage and transportation, the relatively low price, have a lot of use in milk packaging. Foreign consumer packaged milk market this trend should arouse our attention, fresh black and white film the next few years will be the development direction of milk packaging. It can be the basis of maintaining the shelf life of milk, significantly reduce product packaging costs, environmental compliance and avoid traditional packaging defects. At present, China's dairy milk packaging companies use black and white film to rely on imports.
Black and white film preservation, and packaging in general by three or four different co-extruded polyethylene plus black and white masterbatch composite. Heat-sealing performance is an important physical parameters of the package. Black and white film for milk packaging, excellent sealing performance to ensure milk automatic packaging line has a wide sealing temperature range, will help improve packing speed, and seal in cold storage and transportation process is not broken bags. Black and white film is generally used a high heat-sealing layer and uniform degree of branching and narrow molecular weight distribution of metallocene linear low density polyethylene (MLLDPE) in order to improve the sealing performance of black and white film packaging. Make it suitable for packaging milk (vertical form - fill - sealing) automatic packaging of high thermal adhesive strength requirements, the impact will not break down milk bags, thus ensuring the quality of milk packaging.
Third, automatic packaging films corruption
Some of Japan's packaging business, in order to avoid contamination of waste packaging on the environment, developed automatic packaging films corruption.
Such corruption can automatically packaging film, with wheat protein (i.e. gluten) or corn, sweet potato starch, glycerol, glycol, polyethylene and silicone oil, are mixed, dried at 150,000 grams per square meter applied pressure, heat pressure from. The film is translucent, made bags or boxes of waste buried in the soil after the run, may soon be biodegradable, becomes fertilizer.
Four, reactive plastic packaging film
Australia's national shipping company successfully developed an active plastic packaging films, makes packaged fresh fruit, vegetables and flowers and other perishable products to maintain its freshness for several weeks long, solves these products long distance transportation problems.
This preservation of good performance packaging film is a breathable film. It allows to produce carbon dioxide and oxygen through, so perishable products to maintain sleep. Further, the film impregnated with organic chemistry agent, capable of absorbing ethylene from mature fruits promoting effect, and perishable products surrounding kept moist; Also, because the film contains trace slow release fungicide, also prevent mold growth. Therefore, to extend the shelf life of packaged fruits and vegetables was more than doubled.
Five, antimicrobial plastic film
巴西維索薩 Federal University has developed a new kind of food packaging materials recently. This material can extend shelf life of food and consumers to reduce the intake of preservatives. Currently, food preservatives are added at once, its drawbacks is that consumers early in the shelf life of food containing a high intake of preservatives, and the shelf late preservative effect is almost lost. Researchers at the university developed a plastic film containing anti-microbial, antiseptic can be gradually released into the food in a certain period, so that not only effectively ensure food quality, consumers can also solve the initial intake of high anti-corrosion warranty problems agent. The researchers made use of bread and sausage experiments yielded satisfactory results.
Six new superconducting thin films
Two independent groups of researchers have successfully developed a high-quality magnesium diboride MgB2 film. The two research groups were research team at the University of Wisconsin research team USA and Pennsylvania State University. These two similar structural quality films are superior to earlier developed magnesium diboride MgB2 films, because they are the epitaxial films, namely grain alignment and negatives of all grains is consistent. The film does not contain impurities Pennsylvania State University research team made at higher temperatures (39.9K) began superconducting. Manufacturing film free of impurities is difficult, Pennsylvania State University research team developed the film is the world's cleanest, more suitable for the fabrication of multilayer devices, is expected to make a breakthrough in MgB2 multilayer devices.
In short, colorful plastic flexible packaging for its excellent performance, reasonable price and benefit the environment and become the fastest growing packaging industry products, continue to replace other packaging, increasing use is expected to remain good in the coming years growth momentum. In order to improve the market competitiveness of the thin-walled plastic flexible packaging, high performance direction, multi-layer composite membrane demand is growing faster than ordinary single-layer film. Polyethylene film and BOPP film applications in the packaging of the most promising.