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Process flow

Since flexographic printing involves inkjet printing, it easily causes paper swelling when exposed to water or excess ink. Local unevenness after printing also affects the next printing process. Paper napkins may also develop wrinkles, and the swellable printing materials further increase tension fluctuations, leading to significant variations in color registration accuracy, making it difficult to produce high-quality products. Additionally, due to the poor moisture resistance of toilet paper, loose fibers on the paper can be transferred to the printing plate upon contact, resulting in misprinting and preventing continuous printing, which severely impacts printing quality and yield. Ordinary tissue paper is made from two or three layers of wrinkle-free toilet paper, folded with hinges, then printed using flexographic technology, and finally processed by a tooth-shaped roller.

A simple combination formed by foil roller embossing—most Chinese napkins fall into this category. Nowadays, napkins used on European and American dining tables are mostly micro-gelled composite materials before printing. Such napkins are flat, wrinkle-free, with a textured and substantial feel. There is also a special type of product called micro-gel composite products, which have a three-layer structure in the middle of the printing layer, thus offering excellent texture and flexibility, and the surface looks more attractive.

For napkins produced by domestic printers, efforts should be made to switch from embossing and lamination to micro-sizing composite printing, which will significantly improve the quality of napkins. Additionally, domestic napkins should also make further improvements in materials to narrow the gap with foreign products. For example, raw paper should be produced using higher-purity wood pulp, sufficient anti-moisture agents should be added, and efforts should be made to meet printing requirements in terms of surface flatness and moisture resistance.