At present, the majority of the wallpapers sold in China are produced by gravure printing. The gravure printing wallpaper gets the features of uniform coloration and distinct layering. The gravure printing wallpaper adopts the gravure engraving metal roller printing production procedure, 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 become combined with the ink, and after separation, the ink is taken away on the wallpaper substrate to form a design. Gravure printing wallpaper is usually uniform in ink and strong in layering.
Gravure wallpaper process
1. Coating: uniformly apply the PVC slurry to the real wood pulp paper, and the thickness of the PVC coating is required to be very uniform.
2, drying: using an oven greater than 20 meters, blowing hot air on both sides of the paper to help make the slurry dry;
3. Printing: printing on timber pulp paper PVC covering with gravure printing machine;
4. Foaming: The coating on the top of wallpaper can be heated by a long oven to soften it and facilitate embossing;
5, embossing: utilizing a rubber roller and embossing roller to press the design on the coating;
6. Cooling: utilize the cooling roller to awesome the pressed flower shape to prevent rebound;
7. Trimming: Cut off the excess white edges on both sides of the wallpaper to the typical width, needing both sides to be neat, uniform in width, without serpentine edges, raw edges and whiteout;
8, storage: refers to the usage of a longer platform for short-term storage of wallpaper, simple to check the surface of the wallpaper;
9. Winding: Use the coreless winder to gather the wallpaper as a completed product of 10 meters/roll, and label it.
Gravure wallpaper features
In order to make sure that the ink is smoothly transferred from the groove to the wallpaper substrate, the oil ink is the best choice, and the groove of the plate roller should not be too deep, so the ink amount of the gravure printing is relatively little. Due to the use of oily inks, the polymer organic solvent is volatile, the ink supply is small, the output is usually high, and the procedure velocity can reach 120 m/min or even more, which may be supplied to the market in large quantities, and currently gets the largest number out there. The flower pattern is certainly delicate and colorful, in fact it is ideal for the relatively toned wallpaper printing (such as for example genuine paper wallpaper, PVC covered wallpaper). This kind of wallpaper can boost the three-dimensional effect after being prepared by embossing.
Flexo printing wallpaper introduction
Flexographic printing can be found in letterpress printing. Wallpapers using flexographic printing possess a large market share in Europe. This is very different from the use of water-centered inks in flexographic printing wallpapers, much less ink consumption, good environmental protection and solid 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 normally made of a photosensitive resin plate having a thickness of 1-5 mm. Ink is split into three types, namely water-centered inks, alcohol-soluble inks, and UV inks. Since the ink found in flexographic printing is usually environmentally friendly, it has been trusted in food packaging printing and includes a bright future. Flexographic printing can be a type of embossing.
Flexographic wallpaper process
The printing procedure for 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 create a pattern by contacting with the wallpaper substrate.
Flexographic wallpaper features
Flexographic printing wallpapers are easy to use water-structured inks, and the amount of ink supplied by printing is relatively small. It is ideal for wallpaper printing with fairly flat substrates. Such wallpapers can also be processed by embossing to improve the three-dimensional impact. Flexographic printing wallpaper has good environmental performance and may be the mainstream of wallpaper in Europe.
Insufficient flexo wallpaper
Due to the slow evaporation of water-based ink solvents, the production capacity is not as good as gravure wallpaper, and the quickness of the process is generally around 100 m/min. Moreover, the flexographic resin roller material is only available from a few international producers, and the domestic plate producing process is expensive and the production price is certainly high, and it is not widely used at present.
Round screen printing wallpaper introduction
The rotary screen wallpaper paper adopts a nickel mesh roller printing production process, and the ink is conveyed to the within of the nickel mesh roller through the feeding tube, and the ink is extruded through the mesh about the nickel mesh roller to transfer to the wallpaper substrate to create a pattern.
Round display printing wallpaper advantages
The large amount of ink is a prominent benefit of rotary screen printing wallpaper, which can be utilized 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 pattern is complete, when a certain quantity of foaming agent is incorporated into the ink, a three-dimensional pattern could be directly created by foaming in a high-temperature drying room, and the three-dimensional impact is generally not elevated by the embossing process.
Second, excellent environmental advantages. The first is the environmental protection features of water-centered ink; the second is that after 220 ° C high-temp foaming treatment, not only can the solvent in the ink become volatilized, but also the harmful residual substances in the substrate could be removed to attain the desired environmental protection Modern Style Wall paper purpose.
Third, the wallpaper is definitely of a high grade. Recently, foreign individual wallpaper manufacturers have prepared the circular display printing foam wallpaper through the embossing procedure, the effect is very good, is the boutique in the wallpaper.
Fourth, the process mixture is flexible. Water-structured adhesive paste could be printed on the wallpaper instead of ink, and then sprinkled with particles of different materials to create a wallpaper of different combinations of printing, foaming, graining, etc., more in line with the novel and fashionable characteristics of modern wallpaper. To cater to people’s constant quest for individuality.
Fifth, the substrate is highly adaptable. The emergence of new materials has promoted the progress of wallpaper, while nonwoven paper and dietary fiber paper have poor surface area flatness than genuine paper. Round screen printing can best adapt to the printing of uneven surface materials in several production processes.
Insufficient rotary screen wallpaper
Due to the usage of water-based ink, large amount of ink, slowest solvent evaporation, and complicated foaming procedure, the production capacity is the lowest, and the process speed is generally on the subject of 50 m/min.