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The traditional rubber version advantage no longer fades out of the market

The earliest flexographic version was a vulcanized rubber plate, which was used in the industry as a rubber plate and was originally carved by hand. With the birth of the photosensitive resin plate and the price drop, as well as the market demand for quality, the use of the rubber plate is gradually reduced. In recent years, users' demand for seamless printing plates has increased. The rubber version of computer engraving has once again entered our field of vision. There are also a small number of applications in China, but there are still great challenges in the overall cost and printing quality of equipment.

In the early 1970s, the liquid photosensitive resin plate first entered the market. Compared with the rubber plate at that time, the plate making speed of the liquid plate was greatly improved, and the printing quality was generally improved. However, the liquid version also brings many challenges. For example, the thickness of the printing plate is completely controlled by the plate making equipment. Therefore, the precision of the plate making equipment is relatively high. The promotion of the liquid plate in China is not ideal, but the domestic plate making equipment is not related. A big relationship, after all, high-end imported equipment is expensive, and customers who are willing to invest are very limited.

Solid photosensitive flexible resin plate opens a new era

In 1973, DuPont invented the solid photosensitive flexible resin plate (hereinafter referred to as "flexo") and entered formal commercial production in 1974. In the following 40 years, several large chemical companies have entered the field of flexible plate production, such as Asahi Kasei of Japan, BASF of Germany (later related business was acquired by Flint Company of the United States), and Medme and of the United States. Companies such as Kodak have developed unique technologies and products that have facilitated the development of flexographic platemaking technology. The breakthrough of flexo is mainly manifested in two aspects. Firstly, the precision of image printing is greatly improved. Compared with the previous rubber plate, flexo can easily produce more than 80lpi. Secondly, there has been a significant increase in ink transfer, print durability and plate making speed.

In the early days of the flexible version, only 1.7mm and 2.28mm thickness plates were used to meet different Demand for printing equipment and substrates, there are currently a variety of plates from 0.76mm to 7mm thickness. Thick plates of 2.28 mm or more are usually used in corrugated board printing, while plates of 0.76 mm and 1.14 mm thickness are Label and Flexible packaging is more widely used. It is worth mentioning that throughout the global flexo printing, the European and North American markets and our Asia-Pacific region, there is a big gap in the demand for flexo thickness. For example, the North American market uses a 1.7mm thickness version for printing labels and films. Materials are more common; most European users prefer a 1.14mm thickness plate for soft The printed and printed 0.76mm thick plate can meet the high-speed printing demand due to the fast plate making speed and small dot expansion. It is also widely used in Europe. The large-scale flexible packaging printing enterprises in China use almost 1.14mm thick plate to print the film. For products, thicker plates are also used on some older equipment, while plates with a thickness of 0.76 mm are rarely used. The influence of printing equipment and process flow has a great impact on this.

Computer direct plate making breaks through flexo limitations

With the development of computer-to-plate technology, the printing quality has been greatly improved, which has further boosted the quality requirements of the packaging and label market. The direct plate-making machine and the digital version brought many benefits to flexo printing. At that time, the limitations of flexographic printing quality were solved, and major breakthroughs were made, such as printing a smaller high-gloss dot, a longer tone range, and a finer Anti-white lines and text. In terms of plate making and printing operations, better plate-making tolerance, better registration, and shorter preparation time have also been recognized by the industry. These features have greatly promoted the improvement of flexo quality and production efficiency. effect.


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