Large-format digital stamping of new post-press processing technology

In view of the defects still existing in hot stamping technology, in order to promote the promotion of hot stamping technology in the digital printing industry and advertising industry, the China Printing Science and Technology Research Institute has convened several experts and engineers who have long been engaged in printing scientific research to form a technical team. Developed large format digital gilding technology to solve the deficiencies of the traditional bronzing technology in the digital printing promotion. The hot stamping process leads to a long stamping process, many processes, high pollution, can not achieve a large area, a hot stamping, instant imprint, and digital stamping technology only cutting, positioning, waste, waste four The hot stamping technology can be applied to the surface decoration of common advertising media such as large-format posters, personalized calendars, and roll-up advertisements. The key technology is:

1. Multi-layer hot stamping film technology: The key technology of hot stamping and self-adhesive is integrated, and a multi-layer hot stamping film structure is designed. Each of these layers plays its part and are indispensable. The role of the bottom paper layer is to support the 6-layer structure on it, and at the same time prevent the transfer layer from sticking during stacking or winding; the positioning layer is to guarantee the positioning of the individual units in the graphic during the hot stamping process; The support layer mainly supports the transfer layer thereon, and at the same time facilitates waste discharge in the hot stamping process; the transfer layer has an interlayer structure similar to the hot stamping foil, in which the optimal combination of layers ensures the smooth transfer of the bronzing process. The waste is fluent and the graphic text is highly adhesive to the printed substrate. The structure has applied for two national invention patents and one utility model patent.

2. Hot-melt adhesive technology: The use of special processes to prepare low melting point, high viscosity, easy to operate liquid hot melt adhesive. The hot melt adhesives currently available on the market are mostly EVA hot melt adhesives for book binding, PU hot melt adhesives for shoe and hat wear, and PVC hot melt adhesives for metal coating. The large-format digital hot stamping process The required hot-melt adhesives (developed by the Institute of Printing Science and Technology of China) must meet the following criteria: low melting point, convenient hot stamping operation of the laminator and manual hot stamping machine; high viscosity, convenient adhesion of the coating material; easy to operate, Solvent-free operation during hot melt coating.

3. Pressure-sensitive adhesive technology: change the formula and composition, and formulate a pressure-sensitive glue solution with high viscosity and low overflow property. Since the gold foil film must be subjected to high temperature stamping during the hot stamping process, the performance requirements for the pressure sensitive adhesive are also very high. The pressure sensitive adhesive that satisfies this performance can only be produced abroad. Our R&D team hopes to be able to localize in the future.

4. Cutting equipment: transform the existing laser equipment, manufacturing low-cost, large-format cutting equipment. In order to meet the requirements of the promotion, we have developed low-cost large-format cutting equipment, which is divided into contact cutting plotter series and non-contact laser cutting machine series. The cutting plotter equipment is low in price and energy consumption, but the film The quality requirements are high; the laser cutting machine has no special requirements for the quality of the hot stamping film, but the price is high and the energy consumption is high. For different customer needs, we have introduced the following three solutions.

Small-format hot stamping solutions - for small-format hot stamping market: personalized invitations, greeting cards, packaging gifts, book covers, etc.;

Large-format hot stamping solutions - for the large-format hot stamping market: roll-ups, banners, posters, ribbons, etc.;

Super large-format hot stamping liberation program - for the large format hot stamping market: wall posters, body posters, large-scale outdoor advertising.

Large-format digital bronzing technology is a surface finishing technology developed by the China Institute of Printing Science and Technology independently developed for fast printing shops, digital printing companies, and advertising companies. The technology is characterized by simple technology, low initial investment, and maintenance. The cost is low. With the maturity of technology and the improvement of related equipment, this technology will surely win more business opportunities for users.