Reasons: 1) the suitability of printing substrate is poor, and the wetting tension is low. 2) The additives (plasticizer, interfacial active agent, smooth agent, etc.) in printing substrate film form precipitation layer, which affects the adhesion fastness of ink layer. 3) The printing substrate absorbs moisture by itself. 4) Poor performance of ink, ink misuse or mixing of different inks. 5) Changes in ink properties (deterioration, whitening). 6) Poor drying and more residual solvents. 7) The contents and environmental conditions of the package reduce the adhesion fastness. Countermeasures: 1) measure the wetting tension, and replace the printing substrate if it is unqualified. The treatment degree of corona treated films is the most important. Whether the treatment is qualified or not, and whether it should be determined by the wetting tension measuring solution. 2) confirm the precipitation on the surface. If the precipitation layer affects the ink adhesion fastness, replace the printing substrate or negotiate with the ink manufacturer for appropriate disposal. When using a film for the first time, it is necessary to investigate its properties and characteristics in detail in advance, and select suitable ink. 3) Change the ink or confirm the ink adhesion fastness of the ink. Gravure inks are mostly produced for specific purposes and should be avoided for other uses or mixing of different inks. And in order to prevent misuse, the residual ink to clearly record the relevant content, date, etc. for reuse. 4) Solve the problem of ink deterioration and whitening. 5) Adjust the drying conditions to solve the problem of residual solvent or reduce the residual solvent to the specified limit. 6) Implement the humidity control of printing site. For easy hygroscopic vinylon, cellophane, nylon and other films and printed materials should be properly kept to prevent moisture. 7) The effects of package contents and environmental conditions on the adhesion fastness of printing ink were fully considered..
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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All over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiation.