Problems that should be paid attention to when hot

Problems that should be paid attention to when hot stamping on the surface of composite paper

in recent years, with the continuous improvement of people's requirements for the grade of commodity packaging, hot stamping, as a commonly used means in the processing of structural materials in packaging finishing, has achieved rapid development, its process technology is becoming more and more perfect, and new application forms continue to appear. However, due to the influence of many factors in practical application, there are still some thorny problems

hot stamping on the surface of composite paper

hot stamping on the surface of white 142 water supply unplasticized polyvinyl chloride pipe fitting paperboard is relatively easy. Most hot stamping foils can obtain good hot stamping effect on their surface, and the requirements for hot stamping foils are not high. Most operators can successfully solve various problems in hot stamping by simply pressing and adjusting the temperature of the hot stamping plate. However, composite paper hot stamping puts forward higher requirements for the performance of hot stamping foil. It is imperative to correctly understand and deal with the relationship between composite paper and hot stamping foil

1. Surface tension of composite paper

there are many kinds of composite paper, mainly including PET film paper, aluminum foil paper, aluminum spray paper, transfer paper, etc. The different surface tension of these composites directly affects the hot stamping effect and the normal operation of the hot stamping process. Therefore, the hot stamping problem of this kind of paper can not be solved by simply adjusting the process parameters. From the characteristics of composite paper and the performance of hot stamping foil, the problem of surface tension of composite paper hot stamping can be solved by the following methods

(1) external assistance method

reasonably select hot stamping foil according to the surface performance of the paper. Mainly with the help of the technical strength of the hot stamping foil manufacturer to solve the hot stamping problem. Generally, the hot stamping foil manufacturer will solve the hot stamping problem by adjusting the adhesive layer of the hot stamping foil according to the performance of the composite paper surface. In the automotive plastic market

(2) the active attack method

carries out surface treatment on the composite paper and changes its surface tension to meet the requirements of hot stamping foil. One of the methods is to apply a thin layer of colorless varnish on the surface of the paper, and apply it wholly or locally according to the specific situation

(3) mutual coordination method

when the above two methods can not solve the hot stamping problem alone, the external assistance method can be combined with the active attack method to achieve the purpose of solving the hot stamping problem

2. The electro-hydraulic servo message universal testing machine for composite paper is widely used in the dynamic and static mechanical property experiments of materials and parts. When solving the hot stamping problem of this kind of paper, we also need to pay attention to the different requirements of various composite materials on the properties of hot stamping materials. Different hot stamping foils are selected according to different papers. The appropriate temperature range of the adhesive layer of the hot stamping foil should also be selected according to the type of composite materials, and hot stamping should be carried out under the best condition. For example, when stamping on PET film paper, the temperature is lower than that on aluminum foil paper