PVC banner is composed of PVC material and polyester. It is also sometimes called a Polyvinyl chloride banner or vinyl banner.
With stable chemical properties and excellent ink absorption, PVC banners are waterproof, flame retardant, durable, and wear-resistant, making them the perfect material for indoor and outdoor advertising displays. In addition, PVC banner is very convenient, easy to move, and can also be rolled up for storage. It can be used not only for outdoor building billboards, light boxes, etc., but also for indoor exhibitions and private parties.
There are three main production processes for PVC banners with such a wide range of uses: Coated banner, Laminated banner and Fitted banner.
Coated banner processing technology is to apply the liquid PVC slurry evenly on the front and back sides of the base cloth with several reverse scrapers, and then completely combine it into a whole through the drying process, and then cool and form. It is characterized by strong anti-permeability, tensile strength and anti-peeling ability.
Because the upper and lower parts of the knife scraping method are a whole, the peeling phenomenon can be eliminated, and the strength of the splicing can be greater than that of the product itself through welding. At present, the flex banner width of this process can reach 5 meters. Due to the complex production process and expensive production equipment, the price is relatively high. The most representative ones are ULTRALON from Germany, UNIFLEX from Korea and SI0EN from Belgium.
All PVC Mesh Banners are made by Coated banner processing technology. The process is also used in some products of the other 3 types (PVC Frontlit Banner, PVC Backlit Banner, PVC Blockout Banner).
The Laminated banner processing technology is to fully stir various raw materials such as PVC powder and liquid plasticizer, and then adhere to the base cloth as a whole under the pressure of a high-temperature hot roller. Its characteristics are that the surface flatness is good, and the light transmission is uniform, which is more advantageous in the interior lighting cloth. However, due to the limitation of equipment, the width is generally not more than 3 meters. The 645 and 945 flex banners developed by 3M are produced by this process. In addition, the Lexi flex banner developed by South Korea’s LG company is also a representative of this type of craftsmanship.
Some products of PVC Frontlit Banner, PVC Backlit Banner and PVC Blockout Banner are all use the processing technology of Laminated banner.
Fitted banner is to form the upper and lower layers of PVC film, through heating, and under the pressure of hot rollers, it is laminated with the optical fiber mesh in the middle, and it is cooled and formed. The biggest feature of this process is that it has excellent inkjet ink absorption and strong color expression. Therefore, with the rise of large-scale inkjet unemployed, it has also brought infinite vitality to such flex banners. At present, the market share of such flex banners has exceeded 70%.
How to print PVC banners？
In the process of using PVC banner, there are mainly 3 printing methods: solvent printing, UV printing, latex printing. Each method has its pros and cons.
1. Solvent printing
There are 2 types of solvent printing, solvent or eco-solvent printing.
Pros: The print is vivid and durable.
(1) The delivery cycle is long. Because it takes time for the print to dry and “degas”.
(2) Not environmentally friendly. Solvent printing requires mixing pigments and solvents to form liquid inks.
(3) The solvent is toxic when dissolved, and requires a lot of ventilation.
2. UV printing
The principle of UV printing is to use UV light to cure the ink.
(1) The delivery cycle is short. Because the ink cures immediately, the banner comes out of the printer dry.
(2) Very cost-effective.
3. Latex printing
Latex printing technology uses the method of placing ink on the banner substrate. It is also a commonly used choice for PVC outdoor banner printing.
(1) Environmental protection
(2) No major glossy bands will appear
(3) The delivery cycle is short. Because the ink cures immediately, the banner comes out of the printer dry.
(4) Lower production cost