The hottest new water-based adhesive composite tra

2022-08-08
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A new water-based adhesive composite transparent holographic material

laser holographic image is used for anti-counterfeiting. Because it is visual and intuitive recognition, it is widely respected by the public in the commodity market. With the development of the economic market, the development of holographic products is also changing with each passing day. On the one hand, the laser holographic plate making technology is constantly innovated, such as computer holograms, double beam engraving holograms, true color holograms, synthetic holograms, password holograms, etc. can be applied to transparent holograms, so that the image quality of transparent holograms is higher and the anti-counterfeiting effect is better. On the other hand: holographic image carrier materials are also constantly updated, from the initial narrow amplitude opaque aluminized logo to the large-scale wide production of translucent perspective holographic film, holographic film plated with high refractive index inorganic media, transparent holographic film coated with nano glue, and the scale is expanding day by day. This material can be made into general packaging materials or packaging bags with holographic images. Because this holographic film is transparent, It can be compounded on a variety of existing packaging materials, advertising samples and paper, integrating anti-counterfeiting and packaging, so as to greatly enhance the decoration and anti-counterfeiting effect of commodities

transparent holography refers to holographic products imaged on transparent materials. The surfaces of these transparent materials are molded to form holographic gratings, which are illuminated by sunlight or point light sources. Through comprehensive optical effects such as reflection, refraction and diffraction, the human eye can see the laser hologram reproduced on the materials. Since the object image seen by the human eye is mainly formed by the effect of reflected light on the human visual nerve, whether it is a holographic image on transparent or opaque materials, we pay attention to the reflection effect of the molded grating. If the reflected light intensity is strong, the holographic pattern will be bright and eye-catching. Therefore, the earliest people developed the holographic pattern on the aluminum coating with strong reflection that is easy to be observed, Then develop and trace the holographic pattern on the transparent material, and because it is transparent, it does not affect the viewing of the pictures and texts of the following objects. It forms a double special pattern that does not interfere with the printed pattern on the original packaging products. Therefore, as a packaging material, transparent holography has naturally become a new favorite material for anti-counterfeiting packaging in the printing and packaging industry

we know that polyester polymer plastic films, such as BOPP and pet, are thermoplastic. When heated and pressurized, they can transfer the interference fringes of the recorded image on the holographic template onto its surface. These embossed fine fringes record the light wave intensity and phase information of the subject, realizing holographic recording. This molded hologram needs to observe and reproduce the object image with sunlight, As the main operation of each friction and wear experiment in white light should pay attention to that after power on, the light of one wavelength will be diffracted by interference fringes, and the diffraction angles are different, so when viewed from different angles, there are images of different colors, that is, the so-called rainbow holographic name (model) image. Originally, as long as the transfer conditions are controlled accurately, the holographic gratings on these films can reproduce the holographic image well, but because the polymer material is heated or eroded by the environment, the weak and fine gratings may be worn out or the film itself has the instinct of recovery and deformation, resulting in the image damage and even disappearance, so the holographic gratings on the polymer material without evaporation of metal, compound or coated with nano glue are unstable, Therefore, a variety of physical and chemical processes are introduced to protect the grating and fix the image. Many physical methods such as high vacuum evaporation of metal, sputtering, electron beam scanning bombardment evaporation of inorganic compounds, etc. the particles evaporated embedded in the grating of polymer film can also play a role in fixing the holographic grating, so as to protect the holographic image, and at the same time, it can also enhance the brightness of the image. However, from the perspective of large-scale production, due to the difficulty of uniformity in the evaporation process, the packaging machine 'target'=_ Blank> the transparent film appears in gold, silver, gray and black. Sometimes the packaging machine 'target=_ Blank> the transparent film becomes translucent, the hologram is damaged, and the equipment investment and energy consumption are large, and the quality qualification rate is limited. In order to avoid the above shortcomings, a chemical process method suitable for large-scale production of transparent holographic film is summarized through research and experiment. The water-based coating adhesive suitable for cloth applicator is prepared by using nano oxide water-based adhesive with high refractive index, adding a certain proportion of specific dispersant under specific pH and heating conditions. This water-based coating adhesive is non-toxic, odorless, without any organic solvent, and is a typical environmental protection production prepared only with tap water, The film used in food and drug packaging should be excellent green products. Experiments have proved that this nano coating adhesive has a special effect on the fixing and protection of holographic patterns. Nanoparticles form a three-dimensional complex on the holographic grating, but as long as it is a mechanical bright film, firmly bonded to the grating, the thickness is extremely thin, less than 50nm, and the flexibility and plasticity are good. It can support and protect the weak holographic grating on BOPP, pet and other films, so that the holographic image is stable, and it is no longer afraid of friction and environmental erosion. With this thin nano protective layer, the front of the transparent holographic image can be further glued and integrated with other packaging materials. In this way, the hologram will be more stable and reliable when it is compounded inside. It fully shows the special effect of nano glue in the application of optical materials

compared with physical methods such as vacuum evaporation, this new chemical material has the advantages of small equipment investment, low energy and material consumption, simple product structure, good product uniformity and high qualification rate. It is suitable for large-scale industrial production. Although some physical methods can enhance the brightness of holographic images. However, we believe that the main purpose of transparent hologram for packaging is anti-counterfeiting. Because the rainbow hologram is colorful, it plays a role in decorating the product packaging sideband. But it is precisely because its king's purpose is to be a professional friction and wear tester manufacturer of Jinan new era Gold Testing Instrument Co., Ltd., which has three-dimensional changes in laser holography! 4 ball friction and wear testing machine Mrs ⑴ 0A Mrs ⑴ 0W and other models are special detection equipment for lubricating oil products, so its brightness should not be too dazzling, so as not to cause confusion. Moreover, anti-counterfeiting products usually should not make the anti-counterfeiting mark too obvious, so it seems that it is better if there is nothing. It is widely acknowledged that a good anti-counterfeiting means requires accurate and reliable information, easy identification by the public, and accurate identification by experts. Besides, this new packaging machine 'target=_ Blank> although the holographic image on the transparent film is not too dazzling, it can reproduce the original image evenly and stably under white light, which is enough to play the role of anti-counterfeit recognition

the research of nanoscience can be traced back to at least the 1960s or even earlier. The discipline of nano materials in China is a new discipline that has just risen in recent ten years and has attracted widespread attention. It involves the knowledge of condensed matter physics, chemistry, materials, biology and many other fields. The birth and development of this discipline has opened up a new way for people to understand nature. The research of nano materials science mainly includes two aspects: one is to systematically study the properties, microstructure and spectral characteristics of nano materials; The second is to develop new nano materials. At present, there are nearly one million kinds of materials in the world, while natural materials account for only one twentieth, which shows that artificial materials play an important role in the development of material science. Many people have predicted that "composite materials will dominate the world". With the development of nanoscience, people have found that nano materials often have unique properties and new laws that are different from conventional materials. Its development may bring new opportunities to the research of physics, chemistry, materials, biology, medicine and other disciplines. Interdisciplinary and mutual influence will also produce growth points in new fields and new ideas for scientific development. Therefore, after the first world nanoscience conference was held in the United States in 1990, Qian Xuesen, a famous Chinese scientist, predicted that nanoscience would be a new technological and industrial revolution in the 21st century. Nano research in China started a little late, but developed rapidly, and has now ranked among the ranks of advanced countries

preparation of nano films: nano films are divided into two categories: one is the film composed of nanoparticles; Another kind of film is that there are more pores or disordered atoms between nanoparticles or another material. A granular film in which nanoparticles are embedded in another matrix material. Because nano films have many characteristics in optics, electricity, catalysis, sensitivity and so on, they have broad application prospects. Transparent holographic nanocomposite film is a typical second kind of nano film

source: China anti counterfeiting Report

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