Analyze the principle and process of self-adhesive printing

Analyze the principle and process of self-adhesive printing

Generally speaking, self-adhesive printing is to print labels, advertising layout patterns and trademarks on special composite paper. Composite paper is generally made of good quality face paper (back) and coated with self-adhesive, and then bonded to the bottom of the surface. on paper. When in use, as long as the bottom paper is peeled off, the self-adhesive paper printed with pictures and texts can be directly pasted on commodities or other objects. Because self-adhesive printed matter has the advantages of easy tearing, strong stickiness, flexible use, wide adaptability, and easy to paste for many times in a row, it is widely used in social and economic life, and the market prospect is very broad.

At present, there are two processes of offset printing and letterpress printing for self-adhesive printing. For products with a large printing layout, such as advertisements, the offset printing machine and letterpress printing machine with circular or circular flattening are used to print, and the product quality and printing efficiency can be more satisfactory. The small-format multi-imposition structure and the need for die-cutting and bronzing of trademarks and label products are most suitable for printing with self-adhesive trademark printing machines. This type of machine has the characteristics of integrating ink distribution and printing mechanism of glue and convex printing machines. It adopts roll-type self-adhesive paper and can complete multi-color printing, foil stamping, lamination, die-cutting and winding at one time. Processes such as leftovers and slitting. The machine can use metal plate and resin plate printing, because of the building block structure, it can flexibly and conveniently add or remove certain functional parts according to the characteristics of the printed parts. The paper feeding structure and paper delivery structure of this machine are basically similar to those of the flexographic printing machine. The agency requires strict time control and positioning control, otherwise it will affect the correct overprinting.

The direction of the paper during the roll paper self-adhesive printing is different from the general printing method. It realizes the overprinting by the axial jumping movement. That is, three sets of printing plates are installed on the printing plate cylinder at the same time. When the sticker paper moves once on the imprinting platform, the printing plate cylinder reciprocates once in the horizontal direction, and one color printing is realized. To print three-color overprint labels, the self-adhesive paper must be moved three times on the platform to complete the overprint work of the whole page. The advantage of this printing structure is that it simplifies the structure of the equipment and reduces the size of the machine, but because the printing stroke is short, the printed product is not easy to dry, which is not conducive to the completion of large-area wet-press wet overprinting, but is more suitable for small-area overprinting or overprint. From the point of view of the imprint structure, the printing quality of the circular flattening self-adhesive machine is better than that of the flat flattening machine, especially in terms of printing solid layout, it can achieve the good effect of average and thick ink layer. However, the self-adhesive machine with a flat-pressing structure can easily print a large-area solid version, so that the layout (printed product) presents an "oily" ink layer, and the printing quality is not satisfactory, and is only suitable for small-format printing.

After printing, the self-adhesive products can also be bronzing, laminating, die-cutting and slitting processes online. For self-adhesive products with online homework at the same time, the layout design should fully consider the characteristics of the equipment, and try to avoid large-area solid layout overprinting, so that printing, bronzing, and lamination can achieve better results.

Hot foil is an indispensable process for self-adhesive products to occupy the upper hand in the market. The copper plate self-adhesive and plastic film self-adhesive products are appropriately decorated with anodized aluminum on the layout, which will greatly improve the added value of the product. However, if the process is not appropriate, the hot stamping of film self-adhesive anodized aluminum will cause problems such as printing on the layout, poor adhesion of the aluminum foil, and burrs on the edge of the layout, which will seriously affect the market image of the product. Therefore, the base color ink should not be printed too thick, and the process should try to achieve dark ink and thin printing, that is to say, the ink hue should be darker, and the printing ink layer should be thinner to meet the requirements of the original, and it is beneficial to the aluminum foil. It can be firmly attached, and at the same time, it will not cause the hot stamping problem of pulling off the background ink. In order to make the hot foil layout clear, the zinc plate should be eroded properly, so that a certain amount of height difference is formed between the hot stamping layout and the vacant part, so as to avoid eye-catching. Because the hot foil pressure is correspondingly larger than the printing pressure, in order to avoid the burr on the edge of the electro-aluminum layout caused by the pressure deformation of the lining, the pad (pad) should be made of medium-hard materials, with a small deformation coefficient and good flatness to ensure hot ironing. Printing effect, so that the quality of batches of products is consistent. In addition, if the hot stamping effect is not good, and there are quality defects such as hot stamping, blurring, and poor adhesion, and the above situation cannot be overcome by the process control measures, consider replacing the hot stamping foil with a better quality grade to improve the hot stamping. print effect.

As long as we accurately grasp and are familiar with the principle and process of self-adhesive printing technology, and comprehensively consider various situations and reasons that will affect the quality, and take corresponding technical measures in a targeted manner, we can print a variety of product quality that is welcomed by the market. Self-adhesive print.

https://www.minongpackaging.com/adhesive-sticker/a5-adhesive-labels.html