Aluminized paper lifts environmental protection under packaging

2. Laser paper

Laser sprayed aluminum paper (referred to as laser paper) is a laser holographic pattern or text signal is loaded onto the surface of the aluminum spray paper by molding. Vacuum aluminum spray paper according to the production process can be divided into direct method (paper spray aluminum) and transfer method (film surface spray aluminum) two. The direct method is to place the paper directly in a vacuum aluminum sprayer for spraying aluminum. This method is limited to aluminum spray paper. The transfer method is to place the PET film or the laser PET film on the glued horse paper or paperboard composite, and then peel off the PET film (the PET film can be used repeatedly), and the aluminum molecular layer is transferred to paper or paperboard by adhesive action. The transfer method can produce random anti-counterfeit vacuum aluminized paper or cardboard with random patterns, arbitrary letters.

Due to the complex production technology of the transfer aluminum spray method, high technological content, and large investment in equipment, it is difficult for ordinary small and medium-sized enterprises to imitate. In anti-counterfeit packaging materials, the transfer aluminum spray method has unique advantages. The international packaging industry puts forward five comprehensive indicators for anti-counterfeiting packaging materials; First, the timeliness, anti-counterfeit packaging must be the latest scientific and technological achievements, in a certain period of time, this technology The result is that it is difficult for the general company to grasp and it is difficult to counterfeit. The longer the time for this anti-counterfeiting technology to stay ahead, the better the anti-counterfeiting effect. The second is aesthetics. An excellent form of anti-counterfeiting should be accepted by the market. The third is identification. The anti-counterfeiting effect must be clear to the consumer before purchase. The fourth is versatility. Advanced anti-counterfeit packaging materials must have universal application in the printing and packaging industry. Advanced anti-counterfeit packaging materials must have universal application in the printing and packaging industry. Manufacturers do not need to add additional equipment, without special training can be applied to the production of conventional packaging. Fifth, economy. Advanced anti-counterfeit packaging materials must have high scientific and technological content, and the price can be accepted by the market, so that the goods can increase the credibility and profitability of the manufacturer on the basis of eliminating counterfeiting.

These five highly demanding comprehensive indicators have been a problem that has plagued the packaging industry for many years. The excellent characteristics of laser anti-counterfeit vacuum ejector paper (card) are extremely close to the above five comprehensive indicators and are an ideal anti-counterfeit packaging. Materials, its application prospects are extremely broad.

Third, aluminum printing paper printing and ink

Aluminizing paper and printing adaptability are special. The surface of the aluminized layer has metal characteristics. In the printing process, the characteristics of the surface of the aluminized paper are directly related to the printing adaptability of printing materials such as printing ink. Therefore, the printing adaptability of the aluminized paper is actually easier to grasp than the printing adaptability of the aluminum foil. Aluminized paper has high surface strength, it can adapt to high-speed printing presses, and it can also withstand the pulling force generated by the increase of ink stickiness. It has good adaptability to improve production efficiency and stabilize printing quality. Aluminized paper surface tension is conducive to the transfer of ink during printing, printing ink film flat, smooth, clear and complete graphics. The structure of the aluminized paper is relatively compact, there is basically no gap, and its surface is similar to the mirror surface; therefore, the aluminized paper does not have absorption properties like ordinary paper, and has low absorption.

The color arrangement of printing should generally highlight the main style of the design. In the printing, the color of the first printing and the color of the later printing are different due to the color sequence, and the effect is not the same; the absorption performance and the drying performance of the aluminized paper are particular. In view of this, it is recommended that multicolor printing presses should follow the following points: Colors with dark colors and small areas should be printed first: Generally, the background color of a large area should be placed on the final print. Such as the first printing a large area on the ground, will cause the back of the color overprint is not on, but also easy to scratch the back of a few colors in the printing, scratching the surface of the background color, resulting in product quality, affect the appearance and design effects of the main colors on the Printed behind. In general, completely transparent ink does not exist, the hue of the printed product tends to favor the hue of the post-printing color; the color of the overprinting accuracy should be printed first. Because aluminum-plated paper has the dual physical properties of metal and paper, colors with high overlay accuracy should be printed on the front; there are stringent requirements when designing cigarette packaging and beer bottle stickers, so when designing documents, Take full account of the lines of printed products to be automated with the packaging line to avoid unnecessary losses.

In terms of ink and drying requirements for printing aluminized paper, penetration is the basis for fixing the ink on the substrate. The speed of fixing is the condition for ink drying, and the drying time is the key to ink conjunctiva. Infiltration is the basis of fixation. In resin inks, the binders for high-grade inks consist mainly of resins, dry vegetable oils, and pigments. The fixing speed is determined by the instantaneous penetration of the pigment on the substrate, and it also relates to the drying time of the ink. In order to penetrate the ink, it is necessary to have a substrate with good absorption performance. However, the absorption performance of aluminum-plated paper is not very satisfactory, whether it is the use of fast-drying, bright fast-curing offset ink, or synthetic ink offset printing ink, Aluminized paper still has a liquid solvent after it is inked. Such an ink is not only the main cause of product stickiness, but also the source of poor drying. To avoid dirt and improve drying performance, special ink must be used. POP ink is an ideal choice for aluminized paper printing. The main advantage over other inks is that other inks cannot be applied to vacuum aluminized films, gold and silver cardboards, films, synthetic papers, and various non-absorbing materials due to adhesion and drying problems. Printed on the material. Therefore, it is better to use POP ink when printing non-absorbent materials. Compared with UV ink, POP ink cell is only half of UV ink, and the color is brighter than UV ink and it is not easy to crack. POP inks can be printed with a general offset press. Unlike UV inks, they require a high-power light curing machine. Printing presses for POP inks do not need to be equipped with dedicated ink rollers, blankets, blister covers, washing water, etc. UV inks are different, all consumables need to be dedicated and the price is more expensive than POP inks. Therefore, using POP ink has a certain price advantage. In the process of using POP inks, the minimum amount of dampening water should be controlled. The pH is generally between 5 and 6. The temperature of dampening water cannot be too high, otherwise it will cause emulsification, generally between 10~15°C. In the case of adding desiccant or other additives, the addition of a large number of not more than 2%, and the speed should not be too fast, preferably controlled at 8000 ~ 10000pcs / h. The temperature and humidity of the printing shop should not be too high, otherwise the moisture on the plate will increase, resulting in emulsification. The general control temperature is 25~28°C and the humidity is about 6%.

Fourth, aluminum coated paper conforms to the trend of environmental protection

From the packaging of cigarette packs, from the soft packs, ordinary white card hard packs to glass cards, and the popular aluminum foil gold and silver cardboard in recent years, to the introduction of high-grade matte process using PET composite cardboard, China Tobacco Packaging has been walking The forefront of the packaging industry. Although aluminum foil gold and silver cardboard and PET composite paperboard have formed high-grade packaging materials with good decorative performance and anti-counterfeiting performance, they are non-environmental materials. In order to meet the requirements of environmental protection and reduce the need for cigarette packaging costs, the use of aluminum-plated cardboard instead of name foil cardboard and aluminized gold and silver cardboard is an inevitable trend.

The greatest advantage of the composite aluminum foil liner is good formability and excellent sealing. Now the aluminum spray paper not only meets the requirements of the cigarette pack in terms of performance, but also the thickness of the aluminum layer of spray aluminum paper is only 1/200 of the composite aluminum foil. The weight is only 1/125. In the transfer of sprayed aluminum paper, due to solving the problems of brightness, folding resistance and printing adaptability, compared with aluminum foil composite cards and PET composite paperboard (commonly known as “bright card”), it has better cigarette pack formability and is not Burst, invariable features. Aluminum foil gold and silver cardboard can neither be recycled as aluminum products, nor can it be recycled as paper. PET composite paperboard is a composite product of aluminized film and paper. Because plastic film cannot be degraded, it is not conducive to environmental protection. Western governments use tax policies to promote the use of environmentally friendly materials, making aluminum spray liners widely used in recent years. Because aluminum-sprayed liners are classified as single materials, they are taxed at 0.4 DM/kg, while aluminum-foil composite liners are used as composite products and are taxed at 2.10 DM/kg. This legislation has had an explosive effect on the cigarette industry. The original packaging materials for aluminum foil composite papers began to switch to aluminum-plated paper. Aluminum spray paper and transfer aluminum spray paper have also begun to receive widespread attention and application in China, especially the application of cigarette packaging materials. After solving a series of problems in printing and forming technology, aluminum spray paper, especially transfer aluminum spray paper, has been applied to cigarette packs on a large scale.

The aluminum layer of aluminum lining paper is 0.02 microns thick, while the thickness of aluminum foil composite lining paper is 7 microns. The difference between the two is more than 300 times. The aluminum resources used for aluminum liner lining paper consumption are significantly smaller than aluminum foil composite lining paper. But their appearance and barrier steam. The performance of water and light is almost the same, and aluminum spray liners are more easily recycled, burned, and easily oxidatively degraded after being discarded. After the cigarette box is wasted, its aluminum is oxidized in a short time and will not cause environmental pollution. After the waste is collected, it can be returned to the paper mill for recycling. The price of aluminum-sprayed cardboard is 10% lower than that of aluminum foil; the speed of cigarette packaging machines on cigarette labels printed with aluminum spray paper is significantly higher than that of cigarette labels made with aluminum foil composite paperboard (approximately 200 bags/minute higher). Due to the above reasons, the widespread use of aluminum spray paperboard will also form an unstoppable trend. (Text / Hu Zhipeng)