Anti-counterfeiting technology of plastic color printing composite packaging

Abstract: This article mainly introduces how to combine the holographic anti-counterfeiting technology and printing compounding technology in the plastic color printing compound packaging bag at present in China, and uses the combination of the unique process technology and composite technology of the advanced fully automatic labeling machine to make The holographic anti-counterfeit label is accurately and accurately attached to the specified position between the two films in high-speed production. This can greatly ensure the anti-counterfeiting function of brand-name product packaging, and at the same time improve the anti-counterfeiting of brand-name products in plastic packaging. The development of this technology not only improves the automation of labeling for anti-counterfeiting labels, but also improves the production efficiency and reduces the production cost. Increased the economic and social benefits of the company. 
Keywords: printing labeling composite anti-counterfeiting
I. INTRODUCTION In recent years, counterfeit and shoddy goods in the Chinese market have been relatively invasive and harmful. According to the experts on anti-counterfeiting, about 1,230 key brand-name products in the country have been jeopardized, with an output value of about 158 ​​billion yuan, and direct losses of nearly 6 billion yuan. The losses of fake wine, pesticides, seeds, fertilizers, and food are even greater. In the aspect of anti-counterfeiting for flexible packaging, a group of manufacturers adopted a self-adhesive holographic anti-counterfeit trademark, which was affixed to a packaging bag and used for anti-counterfeiting. However, this type of anti-counterfeiting label can be easily peeled off and the anti-counterfeiting effect is not good. Counterfeiters can also buy self-adhesive labels to attach to counterfeit goods. Counterfeit goods generate huge profits, which drives some lawbreakers to take risks. For counterfeit goods, they all have a common feature. They are fake on outer packaging, counterfeiting brand-name products, and the use of printing composite flexible packaging security paste logo To the real anti-counterfeiting effect, at the same time, this is also a major breakthrough. To do this, it is necessary to combine printing, anti-counterfeiting, and product manufacturers. In particular, product packaging manufacturers must combine printing composite technology and anti-counterfeiting technology to speed up the automation of trademark paste, increase the security of plastic composite packaging, and increase the security of packaging. Level, 1993, has noticed the defects of the adhesive trademark, and considered the use of laser holographic anti-counterfeit labels in high-speed printing, while thermal transfer to the printing film, the previous stage was informed that a foreign company developed a unique full Automatic labeling machine. For this purpose, a labeling machine was purchased and combined with the existing eight-color printing compound production line, and successful experiments and mass production were carried out. According to the expert and user's appraisal, it is believed that the anti-counterfeiting effect of the flexible packaging has been achieved.
Second, the experimental part 1, experimental raw materials BOPP (biaxially oriented polypropylene) production; Jiangsu Zhonglong Group (polyethylene) 1C7A Beijing Yanshan Petrochemical Company production; laser holographic security label Anhui laser image company production.
2. Experimental equipment (eight-color printing machine) Korea Xingan Machinery Co., Ltd. (Automatic Labeling Machine) Japan Nishimura Machinery Co., Ltd. (Rewinding Machine) Wuhu Tianhua Plastic Industry Co., Ltd., (extrusion compounding machine) Japan Modern Machinery Company, (slicing machine) Korea Star Machinery Co., (high-speed three-sealed bag making machine) Japan Hugu Machinery Co., Ltd.
3, process conditions (1) eight color printing
Printing speed: 180m/min 印刷 Printing tension: 10kg 
(2) Labeling speed: 40m/min 盘 Maximum diameter of disc: 400mm
The minimum spacing of the tagged object: 5mm 标签 The pre-stripping length of the tag: 0-150mm
The minimum width of the label: 5mm The maximum width of the label: 150mm
Labeling error: ±1mm
(3) Rewinding speed: 100m/min Tension: 10kg
(4) Composite compound speed: 120m/min
Extruder body temperature: 1225°C2284°C3310°C4324°C
Die adapter temperature: 330°C
T-die temperature of each segment: 1328°C2330°C3309°C4330°C5327°C
Manifold temperature: 331°C Cooling roller water temperature: 5°C
Composite film width: 1100mm 最大 Maximum extrusion volume: 150kg/h
(5) slitting slitting speed: 200m/min slitting width: 300mm
(6) Bag making speed: 180/min 制 Bag feeding: 100mm
Heat sealing error: 15kg/mm ​​纵向 Longitudinal error: Within ±0.5mm Lateral error: Within ±0.5mm 4 inch process technology to produce a bag with laser holographic anti-counterfeiting label, technical design personnel when carrying out graphic design , must take into account the optimization of graphics. Label design, this design takes into account the interests of the manufacturer, but also consider the production process and equipment when producing anti-counterfeiting packaging, and to take into account the consumer's convenience and artistic recognition. The most important of these is to combine the printing equipment in production to ensure the accuracy of the labeling, but also to take into account the difficulty in production, try to make the design of the label and the pattern on the packaging bag to coordinate, not too complicated, try to use the line version pattern. After the graphic design is completed, the location of the holographic logo must be solicited by the user before it is accepted, and then the plate-making factory plate will be submitted. After the plate is rolled, it can be printed on the printer after inspection. And strictly according to the printing process operation, in particular, should be posted anti-counterfeiting labels, to ensure the quality of printing. After printing, the printing film is taken on a rewinding machine and the number of labeling machines is determined according to a number of labeling patterns in a row on the film roll.
When the equipment starts operation, firstly, the automatic correcting device on the rewinder should be adjusted so that the electric eye can track the dedicated tracking line of the edge of the registered BOPP film. Then, the automatic electric eye tracking device on the labeling machine can register on the printing film. Special tracking sign. When designing a pattern, such a mark must take into consideration the distance between the upper and lower marks of the mark, that is, the distance between the upper and lower patterns at which the label should be placed in the print pattern. The size of this place must be strictly controlled without error. Therefore, when designing a pattern for each product, it is necessary to leave a tracking mark of about 15 mm in the center of the film roll to ensure that the electric eye on the labeling machine operates synchronously with the labeling action. When the equipment is all in normal operation, the intermediate automatic tracking device tightly registers each color mark number that appears, and quickly feeds back the signal to the labeling machine. At this time, the stepping motor on the labeling machine is started quickly and the power is transmitted to the sticker. The labeling head at the front end of the labeling machine quickly separates the holographic anti-counterfeiting labels on the pressure-sensitive adhesive from the paper, and quickly affixes the labeling to the position where the printing pattern is left blank. At the same time, the labeling machine front end A pressure roller will be labeled and pressed firmly. The peeled paper was rewinded by the winder rewinding mechanism on the labeling machine. At this time, it is necessary to precisely adjust the unwinding tension of the synchronously running label and the tension of the unwinding of the printing film. Each labeler and the labelled pattern must be adjusted correctly.
When doing this program operation, all labeling speeds are not too fast. Generally, for the pattern labeling that requires stricter control, a labeling machine is controlled at 200 pieces/min, and the position of the label is not strict, that is, the printing pattern film without a specific blank labeling position, the labeling speed Can be speeded up, making efficiency increase several times. Because it can be affixed to the label in a roughly specified area. Generally, the labeling speed of a labeling machine to 12mm×12mm can reach 800 pieces/min. The speed of the rewinding machine can also be mentioned as high output of 60m/min. Because there are at least 4 patterns in the transverse direction of the film roll, 4 labeling machines can be installed on the rewinding machine. Therefore, in the production of each product, it is determined that in designing artwork and imposition maps in the future, the processability in actual production must be taken into consideration, and as far as possible, no specially marked hollows should be left, so as to process itself. The production brings a lot of inconvenience, pay attention to, when designing the manuscript, must ask the customer's opinion of the manufacturer.
In addition, the use of multiple times, found that the labeling machine is the key to production. When the general speed of labeling is 200 pieces/min, the labeling position is extremely accurate. Basically, the error is less than ±1mm. At 800 pieces/min, the error is almost ±1mm. At present, the production can not be guaranteed less than ±1mm. In the future, improvements should be made to machinery and electrical appliances.
In addition, at the time of labeling, the number of different product labeling speeds and the total number of labels are digitally displayed. The total number of labeling tasks or the total number of preset labels can be preset in the operation. Pre-notice signals and stop signals can be issued before completion of labeling. For multiple patterns, when multiple labeling machines are working at the same time, it is necessary to adjust the synchronous operation. In particular, it must be synchronized with the winder speed. In addition, during the operation of the labeling machine, it is necessary to always pay attention to the tension of the labeling tape, otherwise, it is easy to cause the tape breakage, resulting in the waste of labels and film rolls. In use, it has also been found that the one-time requirement for the synchronization of the labeling machine and the rewinding machine is very high. First of all, due to slow start-up debugging of the tension of the two products, such as the printing film running speed of 60m/min, and the machine running a 1mm error, the labeling position will appear 1.33mm error, if the tension is inconsistent, There will be an error of 1.33mm in advance or back immediately. Therefore, this element must be strictly controlled in production. 
In addition, when customizing the anti-counterfeit labels required for production, it must be noted that when customizing each type of laser holographic anti-counterfeit labels, it is necessary to acquire knowledge of the laser holographic anti-counterfeit labels. In particular, when customizing the marking size of a product, it must be connected with international standards as far as possible, and it needs to be emphasized. As the size of the laser holographic anti-counterfeit labels on the international market at present is set to a minimum of 12mm x 12mm, the practice has proved that this requirement is reasonable. However, some manufacturers in China have made holographic labels smaller and smaller, some of them are only 9mm, so that the bands that they do have become narrower and narrower. This will directly affect the quality of the tape, and it is also easy to damage the labels. . If the label size is made smaller, the tension is not controlled when peeled off. It is not peeled off, or the tension is too large, and the label is broken. Therefore, when ordering a laser holographic anti-counterfeiting standard tape, it must be performed in accordance with relevant standards. Printed BOPP film, after being labeled, is then compounded on a laminating machine. The composite process and technical production process is the same as that of a general composite film product without any change, and then cut and bagged.
Third, the results and economic comparison In the production of color printing composite packaging film bag, using a fully automatic labeling, instead of the traditional hand-adhesive labeling, such as: in the past, salt bags, hand-stamped holographic anti-counterfeiting trademarks, human The cost of materials is large, the efficiency is poor, and the labeling is also very irregular and unsightly. The location of the labeling is also not likely to be accurate. This is a man-made factor and it is difficult to control. The use of a fully automatic labeling anti-counterfeit printing iodized salt packaging bag is extremely effective. Hand-labeled iodized salt bags, a production line, skilled packaging workers 150, down every year, the cost of wages about 900,000 yuan, the current use of automatic anti-counterfeit compound logo packaging bag production line, only 12 people, only need a year The cost of wages is about 10 million yuan, which brings excellent economic and social benefits to the company. Moreover, the most important thing is to protect the reputation of the product, so that consumers can easily identify genuine and fake products, and it is also very easy to accept. It not only protects its own products, but also lowers the cost of the manufacturers, and the economic benefits increase linearly, benefiting greatly.
IV. Conclusions The use of a fully automatic labeling machine enables the combination of anti-counterfeiting technology and printing composites, which will help increase the security of plastic composite packaging and increase the visibility and security of products. It is expected that in the plastic packaging printing industry, it will be further promoted and applied. Consumers, printer manufacturers, security label manufacturers and brand name product manufacturers are the ultimate beneficiaries of this technology. (Zhang Xiaowei)