In recent years, with the continuous improvement of product packaging requirements, hot stamping technology, as a common process technology in packaging design, has also developed rapidly, and its process technology has also become more and more perfect. In the hot stamping process of the hot stamping foil, the hot stamping foil itself has the following technical requirements: the hot stamping foil is wear-resistant and high temperature resistant; during hot stamping, the hot stamping foil maintains the same color; the bottom layer is evenly painted without obvious color difference or color streaks And stains; the primer coating is uniform, smooth, white and free of impurities, without obvious streaks, sand spots and oxidation. However, there will still be some tricky problems in practical applications. Let's take composite cardboard hot stamping as an example.

　As we all know, it is easier to hot stamp on the surface of white cardboard. Composite cardboard puts forward higher requirements on the performance of hot stamping foil. To correctly understand the relationship between them, we must carefully analyze the following aspects:

 1. Analysis of the surface tension of composite paper

  There are many types of composite paper, currently, there are roughly these types: PET film paper, aluminum foil paper, aluminum spray paper, transfer paper, and so on. The surface tension of the composite materials of these papers is different, which directly affects the hot stamping effect and the normal progress of the hot stamping process. The hot stamping problem of this type of paper cannot be solved by simple operations. From the analysis of the characteristics of composite paper and the performance of hot stamping foil, the problem of surface tension of composite paper hot stamping can roughly be solved by the following methods:

　External assistance method: According to the surface properties of the paper, make a reasonable choice of anodized aluminum and solve the hot stamping problem with the help of the technical strength of the anodized aluminum manufacturer. Their main method is to solve the hot stamping problem by adjusting the hot stamping foil glue layer according to the surface properties of the composite paper.

　　 Active attack method: The surface properties of the composite paper are treated to change the surface tension to meet the requirements of bronzing foil. A thin layer of colorless varnish can be coated on the surface of the paper (full or partial coating can be used according to the specific situation) to change the surface tension of the paper to meet the requirements of hot stamping foil.

　Mutual coordination method: When the above two methods alone still cannot solve the hot stamping problem, the external assistance method and the active attack method can be used together to achieve the purpose of solving the hot stamping problem.

2. Analysis of composite paper hot stamping performance

　The composite paper has various types of composite materials, and their physical properties are necessarily different. When solving this type of paper hot stamping problem, it is also necessary to note that each composite material has different requirements for the performance of the hot stamping material. Different hot stamping foils are used according to different papers, and the appropriate temperature range of the hot stamping foil glue layer should also be selected according to the type of composite material so that hot stamping can be carried out in the best state. For example, the hot stamping temperature on PET film is lower than the hot stamping temperature on aluminum foil, and so on. Bronzing foil is commonly known as anodized aluminum in northern my country, and the name of anodized aluminum is more used in the printing industry. The bronzing foil is composed of a polyester film (PET) and a multi-layer chemical coating and aluminum layer coated on its surface.

Wenling Gaobao Industrial Co., Ltd., as a hot stamping foil supplier and hot stamping machine factory, provides printing equipment such as heat transfer printing film and hot stamping machine. Welcome your inquiry.