Why can eight edge seal bag have food spoilage

In fact, once the food in the packaging bag deteriorates, there are only two factors that affect the packaging material and the packaging process.

Let's analyze the influence of eight-sided sealing bag material on eight-sided sealing bag. Eight-sided sealing bag material as an important level of eight-sided sealing bag, its quality has a direct impact on the quality of eight-sided sealing bag. If the biscuit crispness is reduced or even sour, if the reason is analyzed from the above of the eight edge sealing packaging material, there are two kinds: the barrier of the eight edge sealing packaging material is poor. Water vapor, oxygen and other gases outside the eight-sided sealing bag infiltrate into the interior, especially in the high temperature and humidity environment, the gas permeability of the packaging materials is high, leading to quality problems such as reduced crispness, oxidation deterioration, acid and so on.

The heat resistance of the eight edge sealing packaging bag material is poor. For composite films containing aluminum (aluminum foil or aluminum film) materials, if the heat resistance is poor, after packaging cookies, during the transportation and sale of the finished package, it is prone to problems such as creases, pinholes and so on, resulting in reduced packaging barriers, oxygen and water vapor infiltration into the interior. The processing technology of eight edge sealing bag also has important influence on the shelf life of food. The processing process of eight edge sealing bag is mainly reflected in its heat sealing process. Once the heat sealing processing problems, may also lead to bag leakage, so that the sealing performance of the bag is poor. Bag or hot seal in a certain pressure or long-term storage process is easy to leak, especially the sealing quality of the hot seal part is poor. If the heat sealing strength is too low or too high, the heat sealing strength is not uniform, more easy to leak.

If food manufacturers find that their products can not reach the positive shelf life, you can refer to the following suggestions:

1) Pay attention to the heat sealing strength of the package, the amount of oxygen transmittance, the amount of oxygen transmittance after rubbing, the amount of water vapor transmittance, the amount of water vapor transmittance after rubbing and the sealing

Performance (negative pressure method) and other major performance monitoring.

(2) Adjust the parameters of the hot sealing machine to improve the quality of the hot sealing; Choose to add high barrier, rub resistant packaging materials or improve the quality of existing packaging.