Development of the Laser Imprint Transfer Process
The initial design of the laser imprint transfer device was developed by a Japanese manufacturer, which relied on a film rewinding system. This method involved significant manual labor and often led to damage or defects in the laser transfer film. To address these issues, a new type of laser transfer equipment based on a closed-loop film roll system has been introduced to the market. This improved device eliminates the need for lifting and handling the film roll, reduces labor intensity, and minimizes the risk of wrinkles or deformation in the embossed transfer film. However, even with this advancement, after more than 10 minutes of continuous use, the closed-loop film roll still needs to be replaced, which remains a time-consuming task.
With the development of the laser embossing transfer process, color printing and laser embossing can now be completed in a single operation. When using this integrated system for production, the representation of the laser holographic image is typically referred to as "Giant Star." Additionally, a new music-tape-style laser holographic pattern positioning laser pressure printing transfer process has also been developed. This method allows the laser embossed transfer film to be unwound and rewound during the imprinting process. When the film reaches the end, the machine stops automatically, and the embossed film at the winding point is quickly rewound before resuming normal printing. This process closely resembles the way a cassette tape plays and rewinds, making it efficient and user-friendly.
Process Requirements for Laser Imprint Transfer
The UV varnish used in the laser imprint transfer process must meet specific standards: it should have moderate viscosity, high purity, and the diluent must be anhydrous alcohol to ensure proper curing. The base film of the laser transfer material should be made of BOPP or PET film with uniform thickness and good image transparency. After extensive testing, it has been found that anilox rolls with 260 lines per inch provide the best results for UV coating. During UV curing, the surface temperature of the laser transfer film must be carefully controlled between 30°C and 50°C to ensure optimal performance.
　 The above content is selected from the second edition of 2012, Printing and Printing Technology, Packaging and Decoration, and more journal content, please pay attention to the journal channel.
This article provides a detailed overview of the evolution and technical requirements of laser imprint transfer technology. As the industry continues to advance, improvements in efficiency, durability, and precision are expected. Whether you're a professional in the printing industry or simply curious about modern imaging techniques, understanding these developments can help you stay ahead in the field. If you want to learn more about related topics, keep an eye on the latest publications and research in the area of laser printing and packaging technology.
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