I. Connotation and Innovation of Green Environmental Protection Packaging
1. Green environmental protection packaging refers to packaging that is harmless to the ecological environment and human health, can be recycled, recycled, and used for sustainable development. In 1999, Europe drafted a decree that stipulated environmental protection and packaging as follows: (1) Packing materials should be as small as possible and their size should be as small as possible. (2) Secondary use of packaging materials. (3) Requirements Packaging can generate new value, through the recycling of product packaging, forming new packaging materials or converting to other resources. In addition, many developed countries have also determined that packaging should meet the "3R+1D" principle, namely low consumption, reuse, recycling and degradability.
In 1987, the United Nations Environment and Development Commission called for the use of green packaging in "Our Common Future."
International requirements for packaging have become increasingly stringent. Countries have formulated many laws and regulations. Some countries have imposed harsh and cumbersome regulations on the packaging of goods. Importers must comply with these regulations, or they must not import or prohibit sales in the market. At the same time, this has also become a requirement of the WTO and more and more emphasis is placed on green packaging.
2. Definition and goals of environmental protection packaging The objectives and requirements of environmental protection packaging go through the entire process of product design, production, packaging, and sales, and until waste utilization and recycling. Environmental packaging requirements The packaging of commodities must meet the requirements of harmlessness, non-pollution and environmental protection from the selection, development, processing, use and recycling of raw materials. At present, developed countries such as the United States, Canada, Australia, Germany, Japan, and France have formulated corresponding regulations and policies on packaging, and some countries have implemented the “environmental protection mark†system to strengthen the environment of manufacturers, importers, and retailers. Protection awareness.
Eco-friendly packaging can also be called green packaging. Packaging is the beautification of products, and the concept of “green†makes this beautification process more environmentally friendly.
The basis of environmental protection packaging is ISO14000. Most countries use this as a standard to promote the environmental protection packaging model. The ISO14000 series expressly states that all internationally purchased products (packages) must undergo environmental certification and ecological assessment (LCA) and use environmental labels. Since 1999, ISO has implemented a green “environmental sign†to push the green revolution of product packaging to a new level, which has greatly promoted Chinese exporters.
If a product or company has obtained the environmental label, it is equivalent to obtaining a “pass†to enter the national market for the implementation of the environmental labeling system; otherwise, the market competitiveness of the product will be severely frustrated, and the environmental label is increasingly becoming a sign of the company’s efficiency improvement and image building.
With the rising awareness of environmental protection and the global economic and industrial system, the concept of “zero packaging†and “green packaging†led by packaging revolution is emerging and put into practice. Green goods and green packaging have become new hot spots. Green packaging is a high-tech form of packaging. From the beginning of raw materials, to the design and manufacture of packaging, and to the recycling of products, every link must be source-cut, efficient, and harmless.
3. What is green packaging printing? Inseparable from packaging is the environmental issue caused by printing. The EU recently required that the concentration of lead, mercury, cadmium, hexavalent chromium, and polybrominated biphenyls in the packaging must be less than 100 ppm (0.01%). This standard began to receive attention from the packaging industry in China. Some inorganic pigments contain lead, chromium, copper, mercury and other heavy metal elements, which have certain toxicity and cannot be used for printing food packaging. In printing inks, organic solvents such as ethanol, isopropanol, butanone, ethyl acetate, butyl acetate, toluene, and xylene are often used, which are toxic and flammable, and are not conducive to environmental protection, health, and safety. Although most of the residue can be removed by drying, the residual solvent will migrate into the food and endanger human health. Therefore, water-based alcohol inks and water-based polish thinners should be used in packaging printing, and the inorganic substances contained in etching solutions used in the plate making process and heavy metal electroplating solutions, photographic films, and organic substances contained in offset printing development washing waste liquids should be used. Efficient treatment to meet emission standards.
In short, green packaging printing must meet the following two conditions: (1) the product should have a high scientific and technological content and scientific; (2) printing materials and printing ink meet environmental requirements and adapt to high speed and exquisite packaging and printing graphics.
Second, environmentally friendly flexographic printing
New technologies and new materials continue to emerge, many of which can be used in the field of green packaging and printing. One example is flexographic printing. Domestic enterprises have always had a strong desire and demand for new environmental protection technologies. The unique features of the flexible version provide good prospects for its development in China.
1. Although the flexo printing started relatively late, the development was unusually rapid. According to statistics, at present, the domestic market share of flexographic printing in the United States accounts for 70% in the packaging and printing field, 85% in the label printing field, and 90% in the corrugated box field. This is due to the advantages of flexographic printing. Compared with gravure printing, it not only reduces the cost of plate making and shortens the cycle time, but also the image quality is almost the same. Compared with offset printing, not only the type of the substrate is greatly increased, but also the problem of color shift of offset printing is solved. In particular, non-toxic water-based inks used in flexographic printing are more than gravure and offset printing. Flexo ink is the only non-toxic ink approved by the American Food and Drug Association in all printing inks. Therefore, it is widely used in the packaging and printing of foods and dairy beverages. Such as the printing of corrugated boxes, the printing of plastic flexible packaging, the printing of composite packaging materials, the printing of Tetra Pak, Tetra Pak, and the printing of labels, are both environmentally friendly and practical. Compared with other printing methods (especially offset printing and gravure printing), we can understand the advantages and disadvantages of flexo printing.
Modern enterprises should pay attention to the development of environmentally-friendly packaging technology in order to enhance the public image of the company.
2. Flexographic printing Originally called "animation printing", a combination of gravure printing and embossing printing techniques. Modern flexo printing technology is a brand-new application discipline. The printing plate is made of resin, the printing ink is water-based, the surface of the printing material is varnished with UV varnish, and the ultraviolet rays are dried. The quality of the printing product can be comparable to that of offset printing and gravure printing. With the application of digital technology, the product is basically odorless and non-toxic. It has no odor residue in printed matter, high brightness of UV UV varnish, and no need for laminating for printing products, which greatly reduces the environmental pollution during printing, and is especially suitable for food and light industrial product packaging boxes. Printing. After its use, the waste can be recycled and used, and it is easily degraded in the natural environment. With the increasing awareness of human environmental protection, flexographic printing technology will have a great development in the early part of this century.
Flexo is an environmentally friendly printing, and printed matter is a green printed product. The characteristics of flexographic printing equipment are high printing efficiency, high printing speed, low investment, and quick results. With the development of water-based ink technology, printing has successfully solved the indoctrination and irreversible technical difficulties. In the 21st century, corrugated cartons will also gradually use flexo printing technology to replace offset printing, which will prevent the offset ink from contaminating the body and smelling the ink. So, flexo printing will be one of the most important printing techniques in the 21st century.
Table 1 shows the forecast results based on the statistical data released by the United States in 1999. From Table 1, it can be seen that the proportion of the total printing volume of various printing methods in the next 25 years has changed.
In recent years, flexo printing has been rapidly developed worldwide, especially its obvious advantages in improving the environment, and is considered as “the best and most promising printing method on the planet†in developed countries in Europe and America.
Third, the application of environmentally friendly water-based inks and UV Varnish <br> At present, China's outer packaging still uses the traditional corrugated boxes, which the main environmental-friendly green packaging (flexible printing corrugated boxes) in the developed countries is still high-tech, In our country is also a special industry. It has high technical content and advanced technology and it is very challenging for carton enterprises. The printing materials and printing inks that need to be packaged must not only meet the environmental requirements, but also be adapted to high-speed and exquisite packaging graphic printing.
1. The main application area of ​​environment-friendly water-based inks and UV varnish is flexographic printing. With the improvement of people’s awareness of environmental protection, there is an urgent need for “green†printed materials. High-precision aqueous inks and UV varnish are high viscosity (1 000 cps to 3 000 cps). Due to the absence of volatile organic solvents, they are non-toxic, non-irritating, non-corrosive, non-flammable, non-explosive, and safe to use. With good characteristics, the product can be directly diluted with tap water or ethanol during use, and there is no harm to the environment and human body. Therefore, it can not only reduce the residual toxicity on the printed surface, but also facilitate the cleaning of printing equipment, and can reduce the static electricity and Easily solvent-induced fire hazards and hidden dangers, so water-based inks and UV Varnish are known as a new type of “green†printed material. Corrugated paperboard is a loose fiber cross-fabric and has strong water absorption. After printing water-based ink, it is mainly made of osmotic drying, and no drying device is required. Therefore, water-based inks are particularly suitable for the printing of corrugated boxes.
Qingdao Jiali Company chose the special flexo water-based ink to use water-soluble acrylic resin, through the comparative test screened the pigments and additives, and compounded with acrylic emulsion, adding cross-linking agent, through orthogonal test optimization formula, developed into Water-based ink products.
The basic formulation of the preferred aqueous ink is shown in Table 2.
Its main technical indicators are shown in Table 3.
2. Due to the increasing standardization of ink quality, the color standard of inks is close to the Pantone standard in the United States. The bead mill produced by the international advanced Swiss Bühler company, the oblique three-roller zapper and the filter Equipment and other production lines and foreign advanced technology, continue to develop a flexible version and water flexo packaging inks, updating old products.
1. Green environmental protection packaging refers to packaging that is harmless to the ecological environment and human health, can be recycled, recycled, and used for sustainable development. In 1999, Europe drafted a decree that stipulated environmental protection and packaging as follows: (1) Packing materials should be as small as possible and their size should be as small as possible. (2) Secondary use of packaging materials. (3) Requirements Packaging can generate new value, through the recycling of product packaging, forming new packaging materials or converting to other resources. In addition, many developed countries have also determined that packaging should meet the "3R+1D" principle, namely low consumption, reuse, recycling and degradability.
In 1987, the United Nations Environment and Development Commission called for the use of green packaging in "Our Common Future."
International requirements for packaging have become increasingly stringent. Countries have formulated many laws and regulations. Some countries have imposed harsh and cumbersome regulations on the packaging of goods. Importers must comply with these regulations, or they must not import or prohibit sales in the market. At the same time, this has also become a requirement of the WTO and more and more emphasis is placed on green packaging.
2. Definition and goals of environmental protection packaging The objectives and requirements of environmental protection packaging go through the entire process of product design, production, packaging, and sales, and until waste utilization and recycling. Environmental packaging requirements The packaging of commodities must meet the requirements of harmlessness, non-pollution and environmental protection from the selection, development, processing, use and recycling of raw materials. At present, developed countries such as the United States, Canada, Australia, Germany, Japan, and France have formulated corresponding regulations and policies on packaging, and some countries have implemented the “environmental protection mark†system to strengthen the environment of manufacturers, importers, and retailers. Protection awareness.
Eco-friendly packaging can also be called green packaging. Packaging is the beautification of products, and the concept of “green†makes this beautification process more environmentally friendly.
The basis of environmental protection packaging is ISO14000. Most countries use this as a standard to promote the environmental protection packaging model. The ISO14000 series expressly states that all internationally purchased products (packages) must undergo environmental certification and ecological assessment (LCA) and use environmental labels. Since 1999, ISO has implemented a green “environmental sign†to push the green revolution of product packaging to a new level, which has greatly promoted Chinese exporters.
If a product or company has obtained the environmental label, it is equivalent to obtaining a “pass†to enter the national market for the implementation of the environmental labeling system; otherwise, the market competitiveness of the product will be severely frustrated, and the environmental label is increasingly becoming a sign of the company’s efficiency improvement and image building.
With the rising awareness of environmental protection and the global economic and industrial system, the concept of “zero packaging†and “green packaging†led by packaging revolution is emerging and put into practice. Green goods and green packaging have become new hot spots. Green packaging is a high-tech form of packaging. From the beginning of raw materials, to the design and manufacture of packaging, and to the recycling of products, every link must be source-cut, efficient, and harmless.
3. What is green packaging printing? Inseparable from packaging is the environmental issue caused by printing. The EU recently required that the concentration of lead, mercury, cadmium, hexavalent chromium, and polybrominated biphenyls in the packaging must be less than 100 ppm (0.01%). This standard began to receive attention from the packaging industry in China. Some inorganic pigments contain lead, chromium, copper, mercury and other heavy metal elements, which have certain toxicity and cannot be used for printing food packaging. In printing inks, organic solvents such as ethanol, isopropanol, butanone, ethyl acetate, butyl acetate, toluene, and xylene are often used, which are toxic and flammable, and are not conducive to environmental protection, health, and safety. Although most of the residue can be removed by drying, the residual solvent will migrate into the food and endanger human health. Therefore, water-based alcohol inks and water-based polish thinners should be used in packaging printing, and the inorganic substances contained in etching solutions used in the plate making process and heavy metal electroplating solutions, photographic films, and organic substances contained in offset printing development washing waste liquids should be used. Efficient treatment to meet emission standards.
In short, green packaging printing must meet the following two conditions: (1) the product should have a high scientific and technological content and scientific; (2) printing materials and printing ink meet environmental requirements and adapt to high speed and exquisite packaging and printing graphics.
Second, environmentally friendly flexographic printing
New technologies and new materials continue to emerge, many of which can be used in the field of green packaging and printing. One example is flexographic printing. Domestic enterprises have always had a strong desire and demand for new environmental protection technologies. The unique features of the flexible version provide good prospects for its development in China.
1. Although the flexo printing started relatively late, the development was unusually rapid. According to statistics, at present, the domestic market share of flexographic printing in the United States accounts for 70% in the packaging and printing field, 85% in the label printing field, and 90% in the corrugated box field. This is due to the advantages of flexographic printing. Compared with gravure printing, it not only reduces the cost of plate making and shortens the cycle time, but also the image quality is almost the same. Compared with offset printing, not only the type of the substrate is greatly increased, but also the problem of color shift of offset printing is solved. In particular, non-toxic water-based inks used in flexographic printing are more than gravure and offset printing. Flexo ink is the only non-toxic ink approved by the American Food and Drug Association in all printing inks. Therefore, it is widely used in the packaging and printing of foods and dairy beverages. Such as the printing of corrugated boxes, the printing of plastic flexible packaging, the printing of composite packaging materials, the printing of Tetra Pak, Tetra Pak, and the printing of labels, are both environmentally friendly and practical. Compared with other printing methods (especially offset printing and gravure printing), we can understand the advantages and disadvantages of flexo printing.
Modern enterprises should pay attention to the development of environmentally-friendly packaging technology in order to enhance the public image of the company.
2. Flexographic printing Originally called "animation printing", a combination of gravure printing and embossing printing techniques. Modern flexo printing technology is a brand-new application discipline. The printing plate is made of resin, the printing ink is water-based, the surface of the printing material is varnished with UV varnish, and the ultraviolet rays are dried. The quality of the printing product can be comparable to that of offset printing and gravure printing. With the application of digital technology, the product is basically odorless and non-toxic. It has no odor residue in printed matter, high brightness of UV UV varnish, and no need for laminating for printing products, which greatly reduces the environmental pollution during printing, and is especially suitable for food and light industrial product packaging boxes. Printing. After its use, the waste can be recycled and used, and it is easily degraded in the natural environment. With the increasing awareness of human environmental protection, flexographic printing technology will have a great development in the early part of this century.
Flexo is an environmentally friendly printing, and printed matter is a green printed product. The characteristics of flexographic printing equipment are high printing efficiency, high printing speed, low investment, and quick results. With the development of water-based ink technology, printing has successfully solved the indoctrination and irreversible technical difficulties. In the 21st century, corrugated cartons will also gradually use flexo printing technology to replace offset printing, which will prevent the offset ink from contaminating the body and smelling the ink. So, flexo printing will be one of the most important printing techniques in the 21st century.
Table 1 shows the forecast results based on the statistical data released by the United States in 1999. From Table 1, it can be seen that the proportion of the total printing volume of various printing methods in the next 25 years has changed.
In recent years, flexo printing has been rapidly developed worldwide, especially its obvious advantages in improving the environment, and is considered as “the best and most promising printing method on the planet†in developed countries in Europe and America.
Third, the application of environmentally friendly water-based inks and UV Varnish <br> At present, China's outer packaging still uses the traditional corrugated boxes, which the main environmental-friendly green packaging (flexible printing corrugated boxes) in the developed countries is still high-tech, In our country is also a special industry. It has high technical content and advanced technology and it is very challenging for carton enterprises. The printing materials and printing inks that need to be packaged must not only meet the environmental requirements, but also be adapted to high-speed and exquisite packaging graphic printing.
1. The main application area of ​​environment-friendly water-based inks and UV varnish is flexographic printing. With the improvement of people’s awareness of environmental protection, there is an urgent need for “green†printed materials. High-precision aqueous inks and UV varnish are high viscosity (1 000 cps to 3 000 cps). Due to the absence of volatile organic solvents, they are non-toxic, non-irritating, non-corrosive, non-flammable, non-explosive, and safe to use. With good characteristics, the product can be directly diluted with tap water or ethanol during use, and there is no harm to the environment and human body. Therefore, it can not only reduce the residual toxicity on the printed surface, but also facilitate the cleaning of printing equipment, and can reduce the static electricity and Easily solvent-induced fire hazards and hidden dangers, so water-based inks and UV Varnish are known as a new type of “green†printed material. Corrugated paperboard is a loose fiber cross-fabric and has strong water absorption. After printing water-based ink, it is mainly made of osmotic drying, and no drying device is required. Therefore, water-based inks are particularly suitable for the printing of corrugated boxes.
Qingdao Jiali Company chose the special flexo water-based ink to use water-soluble acrylic resin, through the comparative test screened the pigments and additives, and compounded with acrylic emulsion, adding cross-linking agent, through orthogonal test optimization formula, developed into Water-based ink products.
The basic formulation of the preferred aqueous ink is shown in Table 2.
Its main technical indicators are shown in Table 3.
2. Due to the increasing standardization of ink quality, the color standard of inks is close to the Pantone standard in the United States. The bead mill produced by the international advanced Swiss Bühler company, the oblique three-roller zapper and the filter Equipment and other production lines and foreign advanced technology, continue to develop a flexible version and water flexo packaging inks, updating old products.
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