In the production of packaging film, enterprises should pay attention to the following items: do a good job of quality inspection of raw and auxiliary materials (film, ink, solvent, etc.). To ensure that only the original and auxiliary materials that have passed the inspection and inspection can enter the production process, and the unqualified original and auxiliary materials are controlled outside the production link. This is the prerequisite for ensuring the quality of the milk packaging film printing.
Customer satisfaction is the supreme criterion and ultimate wish of every printing company, so it is necessary to do a good job in finished product inspection. Achieving both customer satisfaction and maintaining corporate image and credibility is also the basis for maintaining and developing good customer relationships.
The plastic film after corona should be used as soon as possible. After being stored for a period of time, the corona treatment effect of the film will deteriorate, and the surface tension of the plastic film will attenuate with the extension of the storage time. It may not meet the requirements when printing on the machine. Therefore, the plastic film stored for a period of time must be carefully tested for its surface tension before use. If the surface tension does not meet the requirements, it must be corona treated again.
In actual production, select the appropriate film and ink according to the filling speed of the automatic filling machine, sterilization conditions, and the length of the product shelf life. Adjust and control the printing process parameters according to the actual situation, standardize the process flow, and ensure the printing quality of the milk film.
When distributing ink, follow the use and adjust, observe the printing effect at any time, pay attention to keeping the ink hue consistent, and control the printing color difference. In long-run printing or printing of large quantities of articles, try to use the same batch of films and inks produced by the same manufacturer.
The changes in temperature and humidity in the printing workshop have a certain influence on the substrate material and ink performance. If the environment is too dry, it will cause static electricity of the film, which will cause printing difficulties. If the environment is too wet, the ink will not dry enough, which will affect the firmness of the ink layer. Therefore, enterprise staff should control the ambient temperature and humidity in the printing workshop to keep it relatively constant and ensure good ventilation. Generally speaking, the temperature of the workshop should be controlled between 18 ℃ -25 ℃, and the relative humidity should be kept between 60% -70%.
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