Environmental issues are one of the most serious challenges facing China in the 21st century. Protecting the environment is the basic national interest to ensure long-term stable economic growth and achieve sustainable development. And with people's increasing awareness of environmental protection, pollution-free and environmental friend packaging is also more popular among consumers. So green packaging was born.
Green packaging is a new concept developed under traditional packaging. It is a packaging that is harmless to the ecological environment and human health and can be reused and recycled and is in line with sustainable development. It is the inevitable choice to solve the serious environmental pollution, and it will be the trend of the packaging industry in the future. Green packaging materials must not only be hygienic and environmentally friendly, but also have the functions and performance that packaging should have.
Due to the impact of the global financial crisis, the growth rate of industrial production in countries around the world has slowed down. However, due to the implementation of strong alliances and transnational cooperation in the world's packaging industry, the world's packaging industry has made new developments, packaging materials and packaging products have grown steadily, new packaging materials, new processes, new technologies, new products are constantly emerging, and plastic packaging It still maintained a relatively high growth rate.
First, the new polyester packaging is unique: the world's eye-catching polyethylene naphthalate (PEN) is a new type of polyester including materials. Since the molecular structure of PEN is similar to PET, benzene ring is replaced by naphthalene ring, PEN has more excellent barrier properties than PET, especially gas barrier property, UV resistance and heat resistance (heat distortion temperature of ordinary amorphous PEN is up to 10007) ℃, while PET is only 70 ℃). In the near future, PEN will definitely enter the packaging field in large quantities, triggering another packaging revolution after PET.
2. New degradable plastics: With the implementation of the international environmental standard ISO14000, new degradable plastics have attracted much attention. German BASF has launched a degraded polyester resin of the brand ECOHEXD with aliphatic diol and aromatic dicarboxylic acid, which can be used for film production. According to reports, the annual demand for the degradable plastics market in Western Europe is 20,000 tons. The main application areas are composting bags, garbage bags, plastic film, composite paper, fast food packaging containers and beverage cups.
3. Vigorously develop metallocene plastics: Metallocene is an organometallic coordination compound formed by the transition metal and cyclopentadiene. Metallocene polyolefin is a polymer prepared by polymerizing olefins using a metallocene complex (netallocene) as a catalyst. Metallocene polymers have many advantages, such as excellent performance such as processability, high strength, high rigidity and good transparency, and thus have received great attention from them, and many new products have been launched. Metallocene plastics will directly impact on PP, MDPE, LLDPE, and elastomeric plastics. The current demand for PE in the world is 40 million tons. It will increase to 50 million tons by 2005, and most of the increase will be metallocene polyethylene. Metallocene plastics have many advantages, such as good gloss, high melt strength and film stability, and are suitable for food packaging, medical packaging, shrink film and hygiene products.
4. Foamed plastics move towards zero pollution: Extruded foamed PP sheet village of A-MUT Company in Italy is the latest development of foamed plastic products. It uses MOH-TELL's high viscosity resin, high melt strength polypropylene (HMSPP), PP homopolymer and low ODP chemical foaming agent to produce foamed polypropylene sheet with fine pores and even distribution (EPP). Foamed PP uses only 12.5% ​​of HMSPP, which has great economic and environmental significance: compared with PP sheets with the same performance, the product density is low, which can save 20% of raw materials, thereby saving 20% Expenses required for damage to the ecological environment. The production of foam for packaging is developing along the path of CFC → HCFC → HFC → HC, and is now advancing towards a green process with zero ODP, low GWP and low pollution.
Fifth, the powerful joint development of new ground: In 1997, the world's PP production reached 23 million tons, the competition is very fierce. Biaxially oriented PP film has grown rapidly in recent years. In 1997, the world's BOPP production capacity has reached 2.82 million tons, and in 1998 it increased by 6% compared with 1997. EXXON, PMT and Bruckner are still the largest manufacturers of biaxially oriented films. The fierce competition in the international market has made companies more group-oriented, rationalized production and fiercely competitive.
6. New medical packaging is particularly gratifying: In recent years, medical plastic packaging, which is closely related to people's health, has attracted attention.
Green packaging is a new concept developed under the traditional packaging design model. It is a packaging that is harmless to the ecological environment and human health, can be reused and recycled, and is in line with sustainable development. It is an inevitable choice to solve serious environmental pollution. Its concept has two meanings: one is to protect the environment, and the other is to save resources. The two are complementary and indivisible. Among them, protecting the environment is the core, and saving resources is closely related to protecting the environment, because saving resources can reduce waste, which is actually the protection of the environment from the source.
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