Discussion on the application of the hottest laser

2022-09-19
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Discussion on the application of laser holographic transfer paper in packaging anti-counterfeiting with the development trend of specialization, high performance and green environmental protection of household appliances

laser holographic transfer paper is also known as laser card paper. It transfers all the traditional laser holographic words and patterns that can only be recorded on plastic film to the paper required for printing without reservation. The compression test machine changes the original laser holographic carrier for low carbon steel and cast iron, And become a new source of anti-counterfeiting packaging materials. Laser holographic transfer paper technology is internationally recognized as a promising anti-counterfeiting technology. It is a high-tech product that combines a number of technologies from different disciplines, such as laser holographic molding, computer lithography, special plate making, precision electroforming, fine chemical industry, high-precision stripping and so on, according to the anti-counterfeiting requirements of the paper packaging industry. It is first made into a transferable holographic plastic film, and then transferred to the paper. It can also be directly molded onto the paper to make a laser holographic transfer paper. 1) The production type of laser holographic transfer paper

the corresponding structure of laser full and single arm is the portal structure. There are many classification methods for information transfer paper, According to the manufacturing process, it can be divided into direct method (direct pressing method) and transfer method (indirect method): according to whether the laser holographic paper is positioned, it can be divided into non positioning holographic paper and positioning holographic paper; according to whether it is transmitted, it can be divided into transmission holographic paper and reflection holographic paper; according to the thickness of the paper, it can be divided into holographic cardboard and holographic tissue

2) fabrication principle of laser holographic transfer paper

① direct method: that is, the fabrication method of directly coating laser holography on paper. This method has simple fabrication process, but has limitations, and is generally limited to light gram paper

process characteristics:

the process is simple and can be produced in large quantities:

the requirements for holographic stencils are high. Because the molding effect of paper is not very good, it can only be suitable for products with low requirements for holographic effect:

the requirements for paper are high. The paper must be copper coated paper with good flatness, otherwise it may cause poor hologram effect or weak aluminum plating or bright toolbox at the lower right, In addition, the water content of the paper is required to be controlled below 4%, otherwise it will have an impact on the aluminum plating: however, the paper after aluminum plating cannot be printed due to its low water content, which is about 3%, so it must be subject to humidity control treatment to make the water content meet the printing requirements:

the requirements for each coating are higher, the primer should have better filling performance, and at the same time, it should have better adhesion with the paper and the molding layer: the molding layer should be firmly combined with the bottom layer and the aluminum layer, It should also have good molding and aluminizing properties: the surface coating plays a protective role and prints ink, so it should have better adhesion and wear resistance with the aluminum layer, and have better printability:

higher requirements for equipment, coater "target="_ Blank "> coating machine, aluminizing machine and molding machine should be designed and manufactured according to the characteristics of paper, and the performance requirements in all aspects are high.

② transfer method: first, laser holographic coating on PET (or BOPP) It is a manufacturing method of transferring the holographic layer to the paper required by the user through the lamination and stripping process. This method can be transferred to various thicknesses of paper, with good brightness, but the process is relatively complex

process characteristics:

the requirements for holographic stencil are relatively low compared with the direct method:

the requirements for paper are not high except for good flatness, but it takes about 2 days to ripen after compounding:! The requirements for each coating are high. The coatings on BOPP and pet are different. The release layer and molding layer on pet should have good adhesion, at the same time, it should also have good wear resistance and printability. The molding layer should have good adhesion to the release layer and aluminum plating layer, as well as better molding and aluminum plating:

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