Different printing substrates have the same printing adaptability. In printing, it is necessary to choose different processes for production in order to achieve better quality effect.
BOPP printing points: select polyamide or chlorinated polypropylene ink printing, appropriate tension and impression force, drying temperature controlled below 80 ℃. Key points of BOPET printing: because pet is usually thin and easy to wrinkle, large tension is required during printing, and it has certain selectivity for ink. When using general printing ink, it is easy to separate layers, block up (not on the Internet), fuzzing and scraping (knife thread) are easy to occur. High humidity in the workshop is good for printing. Key points of BOPA printing: BOPA is a film easy to absorb moisture and deform. Therefore, it is necessary to ensure that the environmental humidity of the printing machine should not be too high (if there is no dehumidification measures and the environment with high humidity is not suitable for nylon film); the unprinted film can not damage its original aluminum film packaging film, and it should be printed immediately after opening, and the nylon film should be preheated during printing (if there is no preheating device on the machine, the printing plate can be installed after the second color, leaving the first color for printing For preheating), the preheating temperature should be 50 ~ 80 ℃; the printing tension should be appropriately reduced, and the pressure should be moderate; the ink adaptability should be strong, depending on the product structure. If it is a cooking bag, cooking ink must be selected. After printing, the product must be sealed and combined as soon as possible. K coating film (Kop, kPa, kpet) printing points: because the thickness uniformity of k-coating film is not very good, the surface is not smooth, and PVDC is rigid and brittle. When printing, the printing tension and pressure can not be too large, the overprint is difficult, the ink transfer is poor, and the printing dot is easy to appear when printing the shallow screen (part of the dot is lost), so it is necessary to use high hardness Press roller for printing. In addition, it is selective to solvent. If the solvent is not used properly, the coating may be dissolved. The residual solvent of printing film is large and easy to adhere. Therefore, special attention should be paid to drying and cooling. Key points of matting film printing: OPP process can be used for inner printing on its smooth surface, but because the extinction layer on its surface can not withstand high temperature, it is necessary to control the drying temperature. Pearlescent film printing points: use surface printing ink for surface printing, and try to choose the surface printing ink with good transparency. Heat shrinkable film printing points: it uses a very low drying temperature, to choose a special heat shrinkable ink (silver ink layer should be able to heat shrink and not fall), if it is PVC heat shrinkable film, also consider the solvent solubility of the film. Key points of UN stretched PP and PE film printing: the tension should be very small when printing, and the overprint is difficult. The printing deformation should be fully considered when designing the pattern. In a word, for different printing substrates, we must make adjustments in ink selection, plate making design and printing process to ensure the quality of products to meet the requirements. In addition, some high barrier coating materials should not be printed on the coating surface as far as possible in case of damaging the barrier coating.
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.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.