Home> Industry Information> Aluminium Cap Sealing Technology Detailed Explanation

Aluminium Cap Sealing Technology Detailed Explanation

October 24, 2018


Electro-aluminum hot stamping is a very important post-printing process in packaging and printing. It is mainly used for hot stamping patterns, texts, and lines to highlight the names and trademarks of products. Ang licensing, landscaping products, thereby improving the quality of packaging products. Electro-aluminum hot stamping is also often used in the post-press processing of hardcover book covers, greeting cards, calendars and other products.

The hot stamping process of anodized aluminum is as follows: the hot stamping plate heats the anodized aluminum, the peeling layer melts, and then the adhesive layer also melts, the adhesive layer adheres to the substrate at the time of imprinting, and the colored layer is separated from the base layer of the polyester sheet. Layers and colored layers remain on the substrate.

The stamping of electro-aluminum on the packaging can not only play a role in beautifying the product and improving the grade of the product, but also play a certain anti-counterfeiting effect.

Stamping after printing

One of the purposes of increasing the hot stamping process is to improve the product quality. However, in practical applications, only reasonable use can play a multiplier role. Conversely, not only does it fail to show the advantages of the product, but it also causes waste. The following points should be taken into account when using the electro-aluminum hot stamping process.

1. Product Design Considerations

1 The hot stamping part should be fully considered, that is, the matching of the color and the printing color of the hot stamping characters or patterns, and the influence of the hot stamping process on the hot stamping.

2 Consider the overall effect of hot stamping and the cost of hot stamping. For example, some products often only hot stamp the outline and text of the pattern, and do not directly stamp the pattern to achieve the effect of point lining; for certain aluminum-plated paper cigarette packs, the printing design can be achieved by first printing the transparent yellow and pressing the bumps. Replace hot stamping to reduce costs.

3 Hot stamping on a large area should also take into account the hot stamping site and the printing pattern of the paper, which need to be based on product overlay accuracy, generally set to 0.2-0.5mm. Of course, it is necessary to take into consideration the stamping adaptability of the aluminum foil itself.

2. The effect of printing before hot and after hot processing

General hot stamping products must be printed before hot stamping, with monochrome printing and multi-color printing; stamping after embossing, UV glazing, laminating, and then printing, die-cutting, paste boxes and other processing.

Pre-hot printing should pay attention to the following points: dark thin printing, the use of strong coloring ink, in the ink as little as possible to add anti-adhesive agent and retreat agent, try not to spray, printing ink, coating oil and anodized aluminum The matching of printability of hot stamping should also prevent the influence of ink crystallization on hot stamping.

After pressing, it is pressed and embossed and die-cut. The effect of the gluing box on the hot stamping is not great. Just take care to prevent the hot stamping foil from being scratched. If you want to use uV varnish after hot stamping, you should consider the acceptability of the electro-aluminum, that is, the surface tension of the electro-aluminum is greater than the surface tension of the UV varnish. If allowed, the hot stamping part of some products can be hollowed out. If UV inks are first printed and then hot stamped according to the process requirements, the stamping properties of the UV varnish should be checked first. Generally, the dyne pen is used to test the UV light film layer, and the surface tension can be more than 3.810-2N/m. Electrochemical aluminum hot stamping. (To be continued)

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