At present, the majority of the wallpapers sold in China are produced by gravure printing. The gravure printing wallpaper has the characteristics of uniform coloration and distinctive layering. The gravure printing wallpaper adopts the gravure engraving steel roller printing production process, the ink is hidden in the groove of the steel roller, and the wallpaper substrate is definitely pressed and deformed by the rubber roller to be combined with ink, and after separation, the ink is taken away on the wallpaper substrate to create a design. Gravure printing wallpaper can be uniform in ink and strong in layering.
Gravure wallpaper process
1. Covering: uniformly apply the PVC slurry to the real wood pulp paper, and the thickness of the PVC coating must be very uniform.
2, drying: using an oven greater than 20 meters, blowing hot air on both sides of the paper to make the slurry dry;
3. Printing: printing on solid wood pulp paper PVC covering with gravure printing machine;
4. Foaming: The covering on the top of wallpaper is usually heated by a long oven to soften it and facilitate embossing;
5, embossing: using a rubber roller and embossing roller to press the pattern on the coating;
6. Cooling: use the cooling roller to cool the pressed flower form to prevent rebound;
7. Trimming: Cut off the excess white edges on both sides of the wallpaper to the standard width, requiring both sides to end up being neat, uniform wide, without serpentine edges, raw edges and whiteout;
8, storage: refers to the use of a longer platform for temporary storage of wallpaper, easy to check the surface of the wallpaper;
9. Winding: Utilize the coreless winder to gather the wallpaper as a finished product of 10 meters/roll, and then label it.
Gravure wallpaper features
In order to ensure that the ink is smoothly transferred from the groove to the wallpaper substrate, the oil ink may be the best choice, and the groove of the plate roller shouldn’t be too deep, therefore the ink amount of the gravure printing is relatively small. Due to the use of oily inks, the polymer organic solvent is normally volatile, the ink source is small, the result is certainly high, and the procedure swiftness can reach 120 m/min or even more, which can be supplied to the marketplace in large quantities, and currently has the largest number in the marketplace. The flower pattern can be delicate and colorful, in fact it is ideal for the relatively smooth wallpaper printing (such as real paper wallpaper, PVC coated wallpaper). This sort of wallpaper can boost the three-dimensional impact after being processed by embossing.
Flexo printing wallpaper introduction
Flexographic printing can be found in letterpress printing. Wallpapers using flexographic printing possess a large market share in European countries. This is different from the use of water-based inks in flexographic printing wallpapers, much less ink consumption, good environmental protection and strong layering. relationship.
About flexo printing
Flexographic printing runs on the flexographic plate to transfer ink through a textured transfer roller. For flexographic printing, the printing plate is generally manufactured from a photosensitive resin plate having a thickness of 1-5 mm. Ink is divided into three classes, namely water-based inks, alcohol-soluble inks, and UV inks. Because the ink found in flexographic printing can be environmentally friendly, it has been trusted in food packaging printing and includes a bright future. Flexographic printing is a type of embossing.
Flexographic wallpaper process
The printing process of the letterpress resin rubber roller is adopted, and the ink is used in the protruding rubber roller pattern through the ink transfer roller, and the ink is transferred to the wallpaper substrate to form a pattern by contacting with the wallpaper substrate.
Flexographic wallpaper features
Flexographic printing wallpapers are easy to use water-structured inks, and the quantity of ink supplied by printing is usually relatively small. It really is suitable for wallpaper printing with relatively smooth substrates. Such wallpapers can also be prepared by embossing to enhance the three-dimensional effect. Flexographic printing wallpaper has good environmental performance and may be the mainstream of wallpaper in European countries.
Insufficient flexo wallpaper
Because of the slow evaporation of water-based ink solvents, the production capacity is not as effective as gravure wallpaper, and the swiftness of the process is normally around 100 m/min. Moreover, the flexographic resin roller material is only obtainable from a few foreign producers, and the domestic plate producing process is expensive and the production price is normally high, and it has not been widely used at the moment.
Round display screen printing wallpaper introduction
The rotary screen wallpaper paper adopts a nickel mesh roller printing production process, and the ink is conveyed to the inside of the nickel mesh roller through the feeding tube, and the ink is extruded through the mesh on the nickel mesh roller to transfer to the wallpaper substrate to create a pattern.
Round screen printing wallpaper advantages
The massive amount ink is a prominent benefit of rotary screen printing wallpaper, which can be used with water-based inks or other aqueous pastes, and thus has many features not really found in other printing production processes.
First, the wallpaper is strong. Since the amount of ink is huge and the design is full, when a certain quantity of foaming agent is incorporated in to the ink, a three-dimensional pattern can be directly created by foaming in a high-temperature drying room, and the three-dimensional effect is generally not improved by the embossing process.
Second, exceptional environmental advantages. The foremost is the environmental protection characteristics of water-centered ink; the second is that after 220 ° C high-temp foaming treatment, not only can the solvent in the ink end up being volatilized, but also the harmful residual chemicals in the substrate can be removed to achieve the desired environmental safety Classic Wallcoverings purpose.
Third, the wallpaper is certainly of a higher grade. In recent years, foreign individual wallpaper manufacturers have processed the circular screen printing foam wallpaper through the embossing process, the result is very good, is the boutique in the wallpaper.
Fourth, the process combination is flexible. Water-centered adhesive paste could be published on the wallpaper instead of ink, and then sprinkled with particles of different components to form a wallpaper of different combinations of printing, foaming, graining, etc., more in line with the novel and fashionable features of contemporary wallpaper. To cater to people’s constant pursuit of individuality.
Fifth, the substrate is highly adaptable. The emergence of fresh materials has promoted the progress of wallpaper, while nonwoven paper and dietary fiber paper have poor surface flatness than 100 % pure paper. Round display screen printing can best adapt to the printing of uneven surface area materials in a number of production processes.
Insufficient rotary screen wallpaper
Due to the use of water-based ink, massive amount ink, slowest solvent evaporation, and complicated foaming process, the production capacity may be the lowest, and the process speed is generally about 50 m/min.