1. The corona treatment of the polyolefin film was poor.
Countermeasures: Check whether the surface tension of PE and PP reaches 40 dynes/cm or more.
2. The printed ink and printed material have poor affinity. This is a poor mixture ratio. Countermeasures: Replace the ink and adjust the solvent ratio.
3. The printing shop temperature and relative humidity change greatly.
Countermeasures: As far as possible, the relative humidity of the workshop should be controlled between 50% and 60%, but it should not be too low. Below 40%, it is easy to generate static electricity. The best room temperature is controlled at 18 °C ~ 23 °C for the best, and keep the environment clean and air circulation.
4. The plastic film itself is extremely poor in printability and is still undesirable after corona treatment.
Countermeasure: Replace the printed material.
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