Material Selection: Choose suitable printing film and ink based on factors such as the filling speed of automatic filling machines, sterilization conditions, and the shelf life of the product. Adjust and control printing process parameters according to specific conditions, ensuring the printing quality of the film. Consider the properties of different inks, such as polyamide surface inks for water resistance but poor resistance to oils. Polyurethane inks have various types, and their selection should be specific to the application, for example, New Oriental Super Power 313A ink is generally used for soft co-extruded PE film, while 314 type is suitable for various co-extruded PE films.
Post-Processing Conditions and Testing Standards: Understand the food manufacturer's conditions during filling and post-processing techniques. Factors such as filling speed, sterilization conditions, shelf life, and storage requirements are crucial for meeting the detailed needs in the liquid packaging market.
Printing Process Requirements: To ensure the printing quality of liquid packaging film, control printing tension, pressure, speed, and drying temperature during the printing process. Establish stable and reliable process standards, standardize the process flow, and ensure smooth production on a large scale. Consider the comprehensive skills of printing workers, technical data provided by ink manufacturers, the quality of thinners, and changes in workshop environments.
Environmental Control in Printing: Fluctuations in temperature and humidity in the printing workshop can affect the performance of materials and ink. Excessive dryness may cause film static, making printing difficult, while excessive humidity can lead to incomplete ink drying, affecting ink adhesion. Therefore, strictly control the environmental temperature and relative humidity in the printing workshop, maintaining relative stability and ensuring good ventilation to minimize printing faults. Generally, keep the workshop temperature between 18°C and 25°C and relative humidity between 60% and 70%.
Quality Inspection of Finished Products: Customer satisfaction is the ultimate goal for every printing enterprise. Ensure that only qualified finished products are sent to customers to maintain the company's image and reputation. This approach not only satisfies customers but also forms the basis for maintaining and developing good customer relationships.
Adaptation to Variable Factors: In the production process of liquid packaging, frequent film changes may lead to variations in film properties. Additionally, using old ink for an extended period may result in a decline in ink performance. Therefore, simulate customer usage conditions and establish appropriate finished product testing standards to ensure that substandard products do not leave the factory, avoiding unnecessary losses.