Application of Laser Holographic Transfer Paper in Packaging Anti-counterfeiting

1) Laser holographic transfer paper production type

Laser holographic transfer paper has a variety of classification methods, according to the production process can be divided into direct method (direct pressure method) and transfer method (indirect method): According to whether the laser holographic paper positioning can be divided into non-positioned holographic paper and positioning holographic paper: According to Transmission can be divided into transmission holographic paper and reflection holographic paper: According to the thickness of the paper can be divided into holographic paper and holographic paper.

2) Laser holographic transfer paper production principle

1 Direct method: It is a method of directly applying laser holograms on paper. This method has a simple manufacturing process but has limitations, and is generally limited to papers with lighter grammage.

Process features:

·The process is simple and can be mass produced:

· High requirements for holographic plate, because the paper's molding effect is not very good, can only be suitable for products with low holographic requirements:

· The demand for paper is high. It is required that the paper must be coated paper with good flatness. Otherwise, the hologram may not work well or the aluminum plating may not be strong or bright. In addition, the water content of the paper must be controlled at 4%. The following, otherwise it will have an impact on the aluminum: However, due to the low moisture content of aluminum coated paper, about 3%, can not be printed, must be humidity treatment, so that water content to meet the printing requirements:

· The requirements for each coating are high. The primer must have a good leveling and have good adhesion between the paper and the molded layer. Must have good moldability and aluminum plating: while the top coat is to protect and print the ink, so it must have good adhesion and wear resistance with the aluminum layer, and have good printability:

High requirements for equipment, coating machine "target="_blank">Coating machine, aluminum plating machine, molding machine to design and manufacture for the characteristics of the paper, all aspects of high performance requirements.

2 transfer method: is the first laser holographic coating on the PET (or BOPP) film, and then after the composite, peeling process, the holographic layer to the user's paper production methods. This method can be transferred to various thicknesses of paper, brightness is good, but the process is relatively complex.

Process features:

· The requirements for holographic platens are relatively low compared to the direct method:

In addition to the requirements of the paper still have better flatness, other requirements are not high, but the compound curing after 2 days or so: The higher the requirements for the coating, coating on BOPP and PET Not the same, in the PET on the release layer and molded layer should have good adhesion, while at the same time they must have better wear resistance and printability, molded layer and release layer and aluminized layer should be better The adhesion, but also have better moldability and aluminizing: