China's storm of the hottest green plastic packagi

2022-10-19
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People in the plastic packaging industry also believe that with the steady growth of the output of packaging materials and packaging products, the current development of plastic packaging products in the world presents four major trends: new polyester packaging takes the lead; New degradable plastics are concerned; Vigorously develop metallocene plastics; Foamed plastics are moving towards zero pollution. However, no matter how the new packaging materials, new processes, new technologies and new products change, we can find one thing from these four trends, that is, the green development trend of plastic flexible packaging. This will also have a great impact on the development of pharmaceutical packaging

the major adjustment of the world economy continues to deepen, and the transformation of the sustainable development strategy provides a big background for the environmental change of the plastic flexible packaging industry, and the environmental protection involved in the sustainable development strategy urges consumers to put forward higher requirements for commodity packaging. Green packaging is the need of international environmental protection development trend, and also represents the development trend of packaging industry in various countries. It is one of the important contents to improve product market competitiveness and avoid new trade barriers. Accordingly, the greening of plastic flexible packaging has also become an important development trend. In recent years, China's plastic flexible packaging industry has developed rapidly, which has also strongly promoted the progress of pharmaceutical, chemical and food industries. In turn, the progress of these industries has further stimulated the market demand for plastic flexible packaging. With the continuous improvement of materials and processing technology, Gravure plastic flexible packaging is playing a more and more important role in many fields. In addition to the needs of life, plastic flexible packaging is also widely used in pharmaceutical packaging and industrial product packaging

connotation of green packaging

there is no completely unified definition of green packaging at present. Generally speaking, appropriate packaging that can be recycled, recycled or degraded, and does not cause public hazards to human body and environment in the whole life cycle of products is called green packaging. The most important meaning of green packaging is to protect the environment, but also has the significance of resource regeneration. Therefore, developed countries in the world have determined that packaging should comply with the "4R + 1D" principle, that is, to minimize packaging resources, develop new green materials that are harmless to human body and the environment, degradable, reusable and recycled

therefore, this profound change in the plastic flexible packaging industry needs to change from traditional to green, from packaging processing equipment to technology, and then to material selection

greening of plastic flexible packaging processing process

greening of composite processing process

new progress of green packaging film

reusable and renewable

reuse of packaging, such as promoting the use of glass bottles for packaging beer, beverages, soy sauce, vinegar, etc., and reuse. Sweden and other countries implement the reuse of PET beverage bottles and PC milk bottles for more than 20 times. Wellman company in the Netherlands and holmson company in the United States recycle 100% of PET containers. For example, after recycling, polyester bottles can be regenerated in two ways. The physical method refers to the direct and thorough purification and crushing, without any pollutant residue, and the treated plastic can be directly used for recycling packaging containers; The chemical method refers to that after crushing and washing the recycled PET, the depolymerizer methanol, ethylene glycol or diethylene glycol is used to depolymerize the pet completely or partially into monomers or oligomers under the action of alkaline catalyst, and then the monomers or oligomers are re polymerized into regenerated PET resin packaging materials after purification

edible

for decades, the glutinous rice paper used in candy packaging and the corn baking packaging cup used to package ice cream are typical edible packaging. Among the synthetic edible packaging films, the more mature is the industrialized pullulan resin in the 1970s. It is tasteless, odorless, amorphous, amorphous white powder. It is a non-ionic, non reducing stable polysaccharide. Because it is a polydextrose composed of a-glucoside, it is easy to dissolve in water and can be used as viscous, neutral and non-ionic non gelatinized aqueous solution

its 5% - 10% aqueous solution can be made into a film with a thickness of 0.01mm after drying or hot pressing. It is transparent, colorless, odorless, non-toxic, tough, high oil resistance, edible, and can be used as food packaging. Its gloss, strength and folding resistance are better than those of films made of high amylose

recently, researchers in Wuhan developed a new type of edible packaging film for inner packaging material. The product is made of dried sweet potato, potato, broken rice and other raw materials, which are transformed into polysaccharides by fermentation, and then the polysaccharides are extended into films. The membrane is a high molecular substance connected by glucose without arbitrarily extending the length of the grounding wire. It has the characteristics of edible, degradable, colorless and transparent, and good oxygen isolation. As a food packaging film, its right angle tear strength, mechanical strength and light transmittance can meet the standard of plastic packaging excellent film. After the film is made into a bag, there is no oil leakage in the milk powder and salad oil, and it can be eaten together with the milk powder in water

degradable

degradable material refers to a kind of plastic whose chemical structure changes at a specific time and in a specific environment. Degradable plastic packaging materials not only have the functions and characteristics of traditional plastics, but also can be decomposed and reduced in the natural environment through the action of ultraviolet light in the sun or microorganisms in soil and water after the service life is completed, and finally re-enter the ecological environment in a non-toxic form. Degradable plastics are mainly divided into synthetic photodegradable plastics, photodegradable plastics with photosensitizers and biodegradable plastics, as well as multifunctional degradable plastics combined with a variety of degradable plastics. According to the environmental conditions of degradable plastics, they are also divided into photodegradable plastics, biodegradable plastics (fully biodegradable plastics, partially biodegradable plastics), chemically degradable plastics (oxygen degradable plastics, water degradable plastics), and composite degradable materials composed of the above three kinds of degradable plastics. At present, the varieties developed in China have covered photodegradation, photodegradation, photodegradation, high starch content biodegradation, high calcium carbonate filled photodegradation, full biodegradation and other categories

polylactic acid (PLA) is a new polyester material produced with organic acid and lactic acid as raw materials. Its performance is better than that of existing plastic polyethylene, polypropylene, polystyrene and other materials. It is defined by the industry as the most promising new packaging material in the new century. It is a bright star of environmental protection packaging materials. It is expected to replace polyethylene, polypropylene, polystyrene and other materials in plastic products in the future, with broad application prospects

use paper materials

at present, many enterprises have considered using medium-sized and heavy corrugated boxes or white board boxes for packaging, and using various moisture-proof and fresh-keeping paper instead of plastic film for packaging. More than half of plastic packaging in the United States has been replaced by new paper packaging. China's Shanghai Jiabao packaging company introduced advanced equipment to develop pulp models. This product is made of natural plant fibers, such as reed pulp, bagasse pulp, wood pulp and other raw materials, through scientific formula and molding. This pulp model is the most ideal product to replace foam tableware

strengthen recycling and reuse, and realize the ecological cycle of packaging waste

green packaging follows the economic activity principle of "reduction, reuse and recycling" of circular economy in the whole life cycle, so as to minimize the impact of packaging on the environment. In recent years, progress has been made in the recycling and reuse of plastic waste, and the problem of secondary pollution has been gradually solved

packaging waste regulations vary from place to place, but there is a common principle: encourage less use of raw materials. In packaging design, we should try to use the same materials, separable and coexisting materials, and tend to use materials with simple structure and easy recycling

on the premise of meeting the packaging function, reduce the amount of garbage as much as possible, so as to show the development trend of lightweight packaging film. The key technology is to use new raw materials with super toughness, which can process thinner and easier to process, such as bimodal polymer HDPE, polyolefin with metallocene catalyst and excellent barrier packaging materials. The domestic plastic flexible packaging industry has made a lot of progress in reducing waste pollution. With the gradual implementation of relevant domestic environmental protection laws and regulations, greater progress will be made in the future. For example, the use of heat sealable stretch film and cover varnish can significantly reduce the amount of materials, which has been widely used in the packaging of cold drink ice cream; By using metallocene polyolefin with high strength, the thickness of the whole packaging film is successfully reduced, and the excessive packaging is gradually reduced; Coextrusion compound 1.4 emission purification device: the application of technology and equipment is also becoming more and more popular, which solves the problem of accurately controlling the thickness of each layer of film. The thickness of expensive barrier layer can be controlled very thin, but the fresh-keeping performance is doubled or even dozens of times improved

China actively develops green packaging

the Asian packaging center established in Hangzhou is China's first worldwide packaging industry center. The construction of this center is an important measure to realize China's leap from 'world packaging power' to 'world packaging power'. Vigorously develop green packaging and environmental protection packaging, and strive to build the Asian packaging center into a world packaging industry center, making it a 'propeller' for the structural adjustment of China's packaging industry and an 'incubator' for the new packaging industry ", which is of great significance to improve the international competitiveness of China's products

actively develop green packaging materials

the packaging materials of export goods can only be allowed to be imported into the importing country with a month on month decrease of 5.8pct if they meet the regulations of the importing country, otherwise the customs of the importing country will not release them. Many countries restrict or impose mandatory supervision and management on the packaging materials of imported goods in the form of regulations. To this end, China has done a lot of work for the green packaging

first, avoid using toxic materials. Pigments, dyes, paints, etc. used on packaging containers or labels should be made of raw materials that do not contain heavy metals as adhesives for bonding materials. In addition to being free of toxic or toxic ingredients, they should also be easy to decompose during separation. The second is to use recycled materials as much as possible. At present, the recyclable recycled materials used internationally are mostly recycled paper. The main interface, main menu interface, measuring point setting, clock setting, printer setting and system setting of the two kinds of recycled equipment made from recycled waste paper are consistent paper boxes, molded pulp, peak pulp paperboard and paper tubes, both in content and display mode. Third, actively develop plant packaging materials. Plants can basically continue to reproduce continuously, and the extensive use of plants generally will not cause harm to the environment, ecological balance and resource maintenance, which is favored by the international packaging market. Fourth, choose a single packaging material. In this way, the material can be disassembled without using special tools, and the recovery and separation time can be saved, avoiding the difficulties of recovery and separation caused by the use of bonding methods

move closer to the world in terms of environmental labeling

the international standard of ISO14000 environmental management system stipulates that any country can refuse to import products that do not meet the standard, so that products that do not meet the standard are excluded from international trade. China's environmental labeling system has fewer product categories, which is far from meeting the needs of the development of foreign trade. Only by complying with this international trend and adopting positive and effective means to catch up

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