When the printed matter is a large area of field or flat screen, there will be four faint circular circles in the second half of the printed matter, which is similar to the size of Feida suction nozzle rubber ring, which is called suction nozzle printing. It is not the second half of the printed matter for a large area of the field or flat screen will produce suction nozzle printing, generally in the following two cases easy to appear. (1) In the case of double-sided printing, the amount of powder used for printing the first side is relatively large, and it is easy to produce suction nozzle printing when duplicating the second side. (2) When the paper surface strength is not enough and the paper powder is large, it is easy to appear suction nozzle printing, such as some white cardboard with gray background. In the above two cases, the surface of the paper is attached with small particles such as paper powder and powder spraying before the paper is moved. In normal paper feeding, when the Feida suction nozzle takes and delivers the paper, it will suck the small particles such as powder spraying and paper powder near the rubber ring of the suction nozzle at the tail of the paper to the bottom of the suction nozzle and inside the suction nozzle. At the end of the paper separation or paper delivery movement, at the moment when the paper is put out by the suction nozzle, the small particles such as powder spraying and paper powder inside the suction nozzle accumulate on the paper directly below the rubber ring of the suction nozzle. In this way, at the end of the paper, there is a small particle such as paper powder, spray powder and so on. When the paper reaches the first color group for press printing, not only the ink on the blanket is transferred to the paper, but also the dust on the paper surface will be transferred to the blanket. In this way, after a long time of printing, a layer of small particles such as powder spraying and paper powder will be attached to the blanket, and there will be several obvious annular white circles at the trailing end of the blanket. Due to the existence of paper powder, dusting and other small particles on the paper and blanket, the transfer of ink will be affected in varying degrees in the process of press printing. The performance is that there are pockmarked white spots on the field color block, dirty spots in the mesh tone part, suction mouth print and blanket ink pile. In order to solve the above problems, in double-sided printing, a small amount of dry oil can be added to the ink on the first side to reduce the amount of powder spray. If the paper surface strength is not enough, paper powder is too large, you can reduce the ink viscosity. If there are suction marks, you can wipe the blanket in time, or put a large area of field, flat screen on the second or last color printing. Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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