As the season changes, stretch film should also pay attention to the production. Stretch film is a new type of packaging material in the logistics industry. For stretch film manufacturers, they may pay more attention to these problems, alternating every season. (especially when spring, summer or autumn and winter alternate), it is the time when stretch film production is most likely to cause problems. Then, when the seasons alternate, what problems should be paid attention to when producing stretch film?

        In the production of stretched film, the most prominent is the excess solvent residue, the decline of printing quality, the white point of the composite link or the decrease of composite strength. The direct influencing factor of these problems is the production environment factor, because the seasonal change will bring the environment. The most obvious change in change is the change in ambient temperature and humidity. However, if the film is produced in a constant temperature and humidity GMP workshop, it will be discussed separately.

        In the seasons where the humidity changes significantly, pay special attention to the storage and use of the BOPA film, and try to avoid placing it in a high-humidity environment. In addition, temperature is also a factor that requires special attention. BOPA film is also sensitive to changes in ambient temperature. Therefore, during storage and use, appropriate temperature parameters should be set to avoid the deformation and deformation of BOPA film due to temperature changes, and Unnecessary troubles for normal production.

        BOPA film is a kind of substrate commonly used in the production of stretched film. Due to the presence of -NH- and -CO= in the molecular structure of BOPA, hydrogen bonds are formed. When water is close, water molecules will intervene to form molecular chains. Longer hydrogen bonds increase the flexibility of the BOPA film and increase the gas permeability.


        Experiments have shown that a BOPA stretch film with a length of 100 mm can be grown to 110 mm in a high-humidity environment for 10 minutes with a variation of 10%. This property of BOPA film is very unfavorable for production. If it is slightly inadvertent, it will cause the phenomenon of paper-like edge of the paper, and lead to quality problems such as overprinting, specification deviation, and compound spots.


        Stretch film manufacturers should pay attention to seasonal production problems, especially pay attention to and control the temperature and humidity of the production workshop, install temperature and humidity adjustment instruments, arrange special personnel to monitor data, form record files, try to control the ambient temperature at around 24 °C, which will be relative The humidity is controlled at 60%; once an abnormality is found, it should be treated in time to adjust the process to eliminate hidden dangers and ensure safe production.


        The above seasons alternate, and what issues to pay attention to when producing stretch film is shared here. Stretching film is quite cost effective compared to conventional wound film. You can combine the last time we mentioned how to reduce the production cost of stretch film together.