The rapid development of China's green packaging technology

Green Packaging Technology

Green packaging, ie, nuisance-free packaging or environmentally-friendly packaging, refers to packaging that has no pollution to the ecological environment, is non-toxic to human health, can be recycled or recycled, and can promote sustainable development. It has two features of ecological environment protection and resource regeneration. The use of green packaging technology in foods can promote the development of the national economy, and at the same time provide a practical way to solve food contamination. Therefore, the green packaging of food is increasingly concerned by people at home and abroad.

Since the reform and opening up, China's economy has developed rapidly. However, due to the weak awareness of environmental protection, the environment has been deteriorating, resources have been consumed excessively, and pollution caused by packaging has been seen everywhere. The annual total amount of packaging waste is more than 15 million tons, and the recovery rate is quite low. The old plastics recycling rate was only 9.6%, and old paper and cardboard were only 15%. In the daily garbage disposal, there are nearly 1,000 tons of fast food boxes and plastic bags. This is an urgent need to improve packaging to protect the environment and resources.

In the late 1980s, the pace of the green revolution accelerated and green packaging came into being. In the increasingly loud environment of the world's environmental protection, China's green packaging also rose in 1993. It not only conforms to the needs of the international environmental protection development trend, it conforms to the requirements of the WTO trade agreement, but also is one of the important ways to deal with new trade barriers, and it is a powerful international marketing tool. It is also conducive to the adjustment of the country's industrial structure and is an important aspect of China's implementation of the strategy of sustainable development. Therefore, green packaging is the main direction of our country.

Wang Jizhong of Xiangyang, Hunan Province, invented a light and bio-degradable plastic, which is characterized in that its components are: polyolefin 80 to 100 (mass fraction, % rhodium), photosensitizer 0.05 to 5, degradation promoter 0.05 to 2. Light stabilizer 0.1 to 5, free agent initiator 0.001 to 1, comonomer 0.01 to 5, auto-oxidant 0.5 to 10, modified starch 100 to 80. The manufacturing method of the invention is: the modified starch is prepared; the polyolefin, the comonomer and the initiator are fully mixed according to the foregoing ratio, heated at 60° C.±5° C., reacted for 0.5 hours, and the modified polyolefin is made, and then the The modified starch was added thereto, and then a photosensitizer, a degradation promoter, a light stabilizer, and an autoxidizer were thoroughly mixed; all the mixture of components was granulated. Han Xuenian of Zhonglian Packing Factory, Daliang Town, Shunde City, has developed an environmentally friendly composite packaging film made of three layers of composite film. The middle layer is pure aluminum foil. One surface is coated with heat-sealing adhesive and the other is coated with paper. Base compound. The heat sealing adhesive is made of acrylic resin and vinyl chloride vinyl acetate copolymer, which solves the contradiction that the moisture resistance of the composite film is high-grade, and it is also suitable for the needs of environmental protection. It is widely used for the packaging of drugs and other articles. In June 2002, Fang Chuanliang of Jinan City, Shandong Province, designed an environmentally friendly packaging bag. It overcomes the problem that existing packaging bags cannot provide containers for husks or peels, causing people to conveniently discard shells or peels to destroy the environment. Its structure is simple, easy to use, and can provide a container containing fruit peel, can be used for packaging such as seeds and other foods. The technical feature is that there are two inside and outside packaged bags, and the inner wall and the outside of the opening on one side of the inner bag have a sticking or sticky adhesive structure, so that the inner bag can be connected with the outer bag after being taken out. Song Daxing of Tianjin invented a kind of high-strength, multi-layer reinforced green packaging paper. It consists of three layers of paper with two layers of ribs, four layers of paper with three layers of ribs, and five layers of paper. The four-layer rib packing paper and the N +1 paper paper sandwiched by N-layer ribs, where N ≤ 9; both the upper and lower surface layers of the multi-layered ribbed paper are paper layers, and the rest of the paper layers are in two. The reinforcement layers are arranged in phase with each other; the ribs are mesh ribs, warp ribs, and the layers of paper are laminated together in a region where no ribs pass through to become a layer; the mesh ribs, their meshes The hole is triangular and quadrilateral; the ribs are linear. The reinforced paper has a high strength and is strong and durable. Since the paper is manufactured by a one-step molding method, the production process is simple, and it is also advantageous for recycling.

Aseptic packaging technology

Aseptic packaging as an industry or field, which includes packaging technology, packaging materials and packaging containers, packaging aids and packaging machinery equipment, packaging aids and packaging research, education, packaging engineering, and related industries and related disciplines . Aseptic packaging in terms of method refers to a packaging method in which the product, packaging container, material, or packaging aid is sterilized and then filled and sealed in a sterile environment. Aseptic packaging not only can maintain freshness at room temperature for a long time without deterioration, discoloration, and taste change, but also has low energy consumption, less consumption of packaging materials, low manufacturing cost, high packaging efficiency, good economic efficiency, and light weight for long-distance transportation. And waste packaging can be recycled and other advantages.

According to the world development trend, dairy products in the future should be changed from milk powder to liquid milk. One can save energy, and second, it can increase nutritional value and facilitate consumption. Dairy products are sterilized and freshly packaged according to 25%. At the end of the “Tenth Five-Year Plan”, aseptic fresh-keeping packaging containers (according to 500ml quantities) are used for 6.75 billion a year. Each container costs 0.55 yuan, worth 3.375 billion yuan. By 2030, it will require more than 20 billion packaging containers (according to 500 ml) each year, worth more than 10 billion yuan. Other aspects such as juice and other beverages, vegetable juice processing industry, and traditional Chinese medicine preparation industry have broad application prospects. At the same time, they also bring new development opportunities to related industries and departments and promote new economic growth. Packaging materials, packaging containers, packaging materials, machinery manufacturing, food and beverage industries will benefit from their development.

Xu Dongshun of Qingdao City, Shandong Province, designed an aseptic packaging machine for liquid foods. The packaging machine included a film with a film from the original drive mechanism. The roll of the film was wound on a roll stand with a long shaft. Disposed between the drive mechanism and the roller bracket is a membrane strip sterilizing device connected to both; a sterile aseptic hood cover is enclosed within an appropriate range of the periphery of the packaging head; the membrane strip is from The rolled stent end of the device is pulled into the device and pulled from the nose of the device into the original packaging head. The machine guarantees the hygienic standard of liquid foods and extends the shelf life and shelf life of foods to more than 30 days. Yin Yongguang of Jilin Changchun invented the pouch aseptic packaging machine to involve a food packaging machine. It is composed of a back plate, a former plate, a main injection pipe, an auxiliary injection pipe, a vent pipe, and a movable press plate. The movable press plate is mounted on the back plate through a hinge shaft, and the former plate is installed between the back plate and the movable press plate. The main injection pipe, the auxiliary injection pipe and the vent pipe are installed on the former plate. The former plate is a sandwich plate structure of a hollow cavity. The sandwich plate is provided with a plurality of small holes. The ventilation pipe communicates with the hollow cavity of the former plate. . The device has the characteristics of low cost, simple structure and reliable operation. Yongquan Chun of Shenyang, Liaoning Province, designed an aseptic packaging machine with a mechanical transmission mechanism. The membrane sprocket on it is connected with the driven sprocket A chain of the membrane feeding device, and passes through the sprocket on it. The driven chain wheel B chain of the membrane device is connected. The driving roller driven by the upper groove cam is connected with the swing arm through the rotating shaft. One end of the swing arm is connected with the vertical sealing clamp by the pulling rod G, and the fixed pulley and the clamping device are passed through the steel rope at the same time. The moving wheel is connected, and the other end of the swinging arm is connected with the transverse cutting cutting forceps through the pulling rod H, and the pre-pulling film adjusting block on the swinging arm is connected with the pre-pulling film rack of the pulling film device through the connecting rod. This utility model changes from pneumatic to mechanical transmission. A main motor drives a speed reducer to complete transverse sealing, vertical sealing, film removal, film length control, pre-pulling film, lamination, unwinding, unwinding length and time control, and bag forming. , ribbon printing and other actions, the mechanism is simple, transmission stability, low noise, long life, easy to master, easy maintenance.