Choose the right material. In actual production, the appropriate printing film and printing ink should be selected according to the filling speed, sterilization condition and length of product shelf life of the automatic filling machine, and the printing process parameters should be adjusted and controlled according to the actual situation, and the process flow should be standardized. To ensure the printing quality of the film. Polyamide surface printing inks are not suitable for liquid-based inks due to their water resistance and oil resistance. Liquid polyurethane inks are generally not available. Polyurethane inks are also of different types. They must be targeted when used. New Oriental Super Life 313A inks are generally only used for softness. Co-extruded PE film, while Type 314 is suitable for various co-extruded PE films. The co-extruded PE film used by color printing manufacturers is generally blown by the manufacturer's own film, and the technical level is different. Therefore, it is necessary to grasp the selection of the masterbatch. It is advisable to use the masterbatch without the slip agent type; the selected PE film is passed. After EDM treatment, the surface energy should be at least 40 dynes, preferably more than 42 dynes.
Customer's post-processing conditions or test criteria. Color printing manufacturers can only do a good job in knowing the conditions of food manufacturers during filling and the processing technology after they are processed, and even the details of the circulation of liquids in the market. The main points of attention include: filling speed, sterilization conditions, length of shelf life, preservation requirements and other printing markets.
The requirements of the printing process. In order to ensure the printing quality of the liquid packaging film, it is necessary to pay attention to the control of the processing conditions such as printing tension, printing pressure, printing speed and drying temperature in the printing process, formulate a set of stable and reliable process standards, standardize the process flow, and ensure scale production. Smooth progress. In addition, the comprehensive quality of the printing workers, the technical information provided by the ink manufacturers, the quality of the thinner materials, and the changes in the workshop environment are also non-negligible factors.
Control the printing environment. The change of temperature and humidity in the printing workshop has certain influence on the performance of the substrate material and ink. If the environment is too dry, it will cause static electricity of the film, which will make printing difficult. If the environment is too humid, the ink will not dry enough and affect the firmness of the ink layer. Therefore, the ambient temperature and relative humidity in the printing shop should be strictly controlled to keep it as relatively constant as possible and to ensure good ventilation to reduce the incidence of printing failures. Generally, the temperature control in the workshop is preferably between 18 ° C and 25 ° C, and the relative humidity is preferably between 60% and 70%.
Do a good job in the inspection of finished products. Customer satisfaction is the highest standard and final desire of every printing company, so we must ensure that qualified products are delivered to customers. This not only makes the customer satisfied, but also maintains the image and reputation of the company, which is the basis for maintaining and developing good customer relationships.
In the production process of liquid package, the film change is frequent, and the performance of the film is not easy to be caused. The amount of ink used in the liquid package is not much. The use of old ink for a long time may also bring about a drop in ink performance. Therefore, the liquid package can be produced. There are more variables. Color printing companies can develop a set of appropriate finished product testing standards by simulating the customer's conditions of use to ensure that unqualified products are not shipped out of the factory and avoid unnecessary losses.