1. The quality change of the packaged things leads to the generation of peculiar smell, which is usually cooked food packaging;
2. It is the octahedral sealing bag itself has a variety of peculiar smell, which is more common in monotonous food packaging.
3. It is a combination of the above two situations, that is, both the peculiar smell of packaging materials and the qualitative change of contents. This situation is more common in fried food packaging.
In case 2, there are also three factors that cause the odor of octahedral bags
First, the odor produced in the production process is generally the residual solvent or monomer smell when using ink, adhesive and solvent.
Second, the odor produced by improper storage. If the octagonal bag is put in an odorous environment for a long time, the irritant molecules will be adsorbed on the surface to form some special flavor.
Third, in the process of transportation, the storage room temperature is not appropriate. The storage temperature of octahedral packaging bags should be higher than 35 degrees. Low molecular substances will be emitted, and more will have a certain flavor.