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Influence and Countermeasures of packaging and printing

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in all links of the printing process, improper process treatment will produce environmental pollution problems, which will have an adverse impact on human body and the environment. It is mainly reflected in: the organic compounds emitted by solvent ink in the drying process, isopropyl alcohol in alcohol wetting solution, hot melt adhesive used for wireless binding, volatile gas of polishing coating, etc. all pollute the air and are harmful to human health
countermeasures to control air pollution
the main printing process of our company is water-based and flexible printing process. In order to control the air pollution caused by organic volatiles of ink, we always adhere to the ISO14001 environmental management system certification standard, and treat all ink containers and all wastes in a comprehensive manner, so as to eliminate the environmental pollution caused by the littering of all wastes. Printing raw materials and auxiliary materials with less pollution sources are used in production, mainly to strictly control the use of ink. There are two common synthesis of water-based ink: one is the synthesis of rosin, pigment and starch with the highest toxic substances. The organic solvent in this ink is harmful to human health. The other is the water-based ink synthesized by resin and pigment, which is also a high-grade ink. This kind of green and environment-friendly water-based ink contains lower organic substances and toxic substances, which greatly reduces the air harm and other pollution to people and the environment. It is also one of the most environmentally friendly printing raw materials in China. 99% of the printing raw materials in our company use this material. Inorganic substances such as corrosive liquid and electroplating waste liquid containing heavy metals used in plate making, and organic substances contained in ink cleaning discharge liquid are one of the reasons for water pollution and soil pollution
countermeasures to control water pollution
the author’s company pays particular attention to prevention in this regard, because water is the root of all things, so it has invested a large part of funds in the construction of sewage treatment system (including pipeline and machine room). The biggest pollution in the packaging and printing industry is the waste oil ink from cleaning printing plates and printing machines and the waste water of paperboard adhesive starch synthetic agent. If these two pollution sources are discharged directly without treatment, they will cause major water environmental pollution. Because these two pollution sources contain sewage with cod7000mg /L, SS (suspended solids) 1500mg /L, chroma 550 times and pH value 6 ~ 9, they do great harm. After installing the sewage treatment system, the water quality of all sewage after multiple treatment and filtration of the system basically meets the standard, cod ≤ 100mg /L, SS (suspended solids) ≤ 70mg /L, chromaticity ≤ 50 times and pH value 3 ~ 4. Through the recycling of the treated sewage, the good effect of saving water by 90% is achieved. It not only saves energy and consumption, but also does a good job in environmental protection. It has no impact on more than 20 mu of river and fish pond, more than 130 mu of shrimp pond and crab pond around the company’s plant, which is deeply appreciated by the local villagers. Printing machines, air compressors and various molding machines will produce varying degrees of noise. In addition, the noise generated by binding equipment is also very large
countermeasures to control noise pollution
the author’s company adopts PLC full computer low-noise environmental protection printing machine, assembly line and other molding equipment, including the large motor of boiler and blowdown pipe gas, which have been specially treated. The plant is also a fully enclosed mixed sound insulation wall design, which eliminates all the noise pollution (including lighting pollution) caused by the equipment to the surrounding and has passed the detection of the environmental protection department. In recent years, there has been no contradiction with the surrounding villagers due to environmental problems. It can be said that the environmental protection work has developed together with the enterprise, which has also brought benefits to the enterprise. Therefore, it has been highly praised by the superior environmental protection department for many times. Pollution of waste printing materials and wastes generated in the printing process: the pollution generated after the containers containing ink, glue and polishing oil are discarded, and the pollution of waste products and waste printing materials generated during printing or trial printing to the environment
countermeasures for waste control
collect all kinds of waste generated in the printing process, recycle valuable articles such as paper, and recycle the materials that are difficult to degrade and harm the environment such as film and plastic film by the garbage recycling station for resource treatment or sanitary landfill
the most effective way is to avoid waste at the first time. Waste reduction can help enterprises reduce operating costs, maintain environmental quality, reduce waste disposal costs, improve the health and safety of the workplace, reduce long-term responsibilities and display a good image of the enterprise
our company has established corresponding mechanisms to strengthen the management and guidance of waste reduction, so as to use pollution-free or low pollution industrial production technology as much as possible, improve printing methods and process flow, and change the structure of raw materials and prints, so as to avoid waste and achieve the purpose of ultimately reducing pollution. The pollution in the printing process is mainly produced in the work link, so the author’s company pays attention to the control and improvement of green design in printing. Now there is a trend, especially in the packaging of gifts and health care products. In order to improve the sales price of goods, some enterprises often make an issue of packaging materials and printing: packaging and printing should be as gorgeous as possible, using the best materials, the most processes, multiple anti-counterfeiting, polishing, film coating, etc., which leads to the prevalence of over printing and over packaging. On the one hand, it is a waste of limited resources and energy, and on the other hand, it also aggravates the impact on the environment. In addition, it also increases the cost of packaging and ultimately increases the burden on consumers
in order to take more responsibility for environmental protection, in the decoration design and creativity, our company tries to guide customers to make use of the color, texture and luster of the printing materials themselves, avoid the design of full plate printing and over printing, and adopt the pollution-free liquid purification technology flexible printing plate, so as to minimize the use of traditional glazing, film covering and other processes and packaging materials when meeting the decoration requirements, Reduce the difficulty of recycling after printing waste and reduce the overall pollution on printing. Some product packages need moisture-proof, waterproof and oil-proof technologies. In order to meet the needs of customers, the author’s company has researched and developed the use of carton water-based sprinkling agent and water-based varnish to replace the previous film covering technology. As the carton sprinkling agent and polishing oil contain almost no solvent and the emission of organic volatiles is less, the production cost is reduced, the air pollution is reduced, the working environment is improved and the potential fire hazard is controlled. The effect of moisture-proof, waterproof and oil proof of carton is no less than that of other traditional glazing films, and the process is advanced and the cost is low. Therefore, it is suggested to minimize the use of coated processing, because it will cause white pollution
like the plastic products we usually use. In addition, the coated paper can not be recycled, wasting natural resources and causing certain environmental pollution
“China’s printing has entered the era of environmental protection”. In the fierce market competition, printing enterprises should also put the environment on the important agenda while developing, so as to coordinate with the enterprise economy and ensure the healthy and long-term development of the enterprise. Through continuous efforts, the company has achieved good results in environmental protection. The enterprise and the environment can coexist harmoniously. Profits do not have to be generated in products. The real profit is to improve the environment and the healthy development of the enterprise. Facts have proved that the environment can coexist harmoniously with enterprises. We will continue to strive to promote the harmonious and environmental protection development of enterprises, and make due contributions to the construction of environmental friendly, green and harmonious printing industry. 1、 Function of bar code and its application in packaging and printing
bar code is an automatic identification information code. Because of its high data acquisition rate, strong reliability and low cost, it is widely used in many books, self-adhesive, commodities and packaging. Bar code is a computer graphic language composed of lines and number symbols with certain length and width, which can be read by photoelectric scanning reading device. Bar code is a kind of data input technology and automatic identification technology researched and developed in recent decades. It can reflect many information such as the type of manufacturer, manufacturer, weight, amount, delivery date and circulation room. It plays an important role in the production, sales, storage, inspection and exchange of goods. It is a link connecting manufacturers, exporters, sellers and customers all over the world
at present, the barcodes seen in the market are all early one-dimensional barcodes. With the development of VLSI technology, aiming at the disadvantage of small information capacity of one-dimensional barcodes, reducing the area of barcodes and improving the ability to resist pollution, two-dimensional barcodes (hereinafter referred to as 2D codes) have been developed to make the area of barcodes smaller and smaller, greatly improve the function of barcode readers and read more accurately, Increased storage space for bar codes. In addition, encryption technology can also be used in two-dimensional bar code to greatly improve the anti-counterfeiting performance of goods. According to different structures, two-dimensional bar codes can be divided into stacking type and matrix type. In printing, it can not only print black characters on white paper, but also print in color. It is not limited to the printing machine and printing object. The reading of data can be rotated 360 ° from line to surface, and the fault correction function can be adopted to restore and identify the stained or damaged bar code. The misreading rate is a few 61 million. The two-dimensional bar code also has large storage capacity, strong damage resistance, high security, fax and photocopying, and good data concealment Information goes with products
with the development of science and technology, a variety of new barcodes have been developed, such as invisible barcodes (including covered invisible barcodes, invisible ink and photochemical invisible barcodes), metal barcodes, watermark magnetic codes, etc., which have improved the depth and breadth of bar code application
II. Technical requirements for bar codes
the original negative of bar codes must be registered, compiled and distributed through international or national coding centers. To enable the bar code to be correctly recognized by the bar code recognizer, the bar code lines shall be straight without breaking, the line edges shall be smooth and sharp without sawtooth, the distance between lines shall meet the standard, the line blackness shall be sufficient and the contrast shall be large. The technical requirements for bar codes mainly include:
(1) size scaling. The bar code is usually printed directly from the original size. To enlarge or reduce the bar code, the printing shall be carried out according to the technical requirements of EAN organization, and can not be carried out at will. Generally, it is stipulated that the zoom ratio shall be controlled at 80% ~ 200%. The bar code scaling rate has a great impact on the printing qualification rate. When the scaling rate is 100%, the printing qualification rate is 97.3%; When the zoom ratio is 90%, the printing qualified rate is 95.7%; When the zoom ratio is 85%, the printing qualified rate is 25%; When the zoom ratio is less than 80%, the qualified rate of printing is only 10%. Therefore, scaling printing is preferably completed by the provider of bar code film
(2) color matching. Since the bar code reading system stipulates that the general scanner light source is a red light source with a wavelength of 630nm ~ 700nm, the red light effect of ink color should be considered
when the incident light of the scanner irradiates the bar code surface of different colors, different effects of reflection will occur. Black ink can completely absorb red light, and the reflectivity of printed matter to incident light is less than 3%, which is the safest and ideal color for bar code; The white ink will completely reflect the red light, and the reflectivity of its printed matter to the incident light is close to 100%. It is the safest blank color. Therefore, the bar code is generally printed in black and white monochrome. However, in packaging and printing, in order to increase its decoration, other color strips are often selected for empty matching. At this time, we should pay attention to the red light effect according to the color

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