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Baking food bags must be sealed before they can be put on the market. What should be paid attention to during sealing? How can the seal be strong and beautiful? No matter how good the packaging bag is, if the seal is not good, it will also affect the appearance of the packaging bag. So what should be paid attention to when sealing baking food bags?

1. Sealing methods for single-layer baking food bags

Ordinary plastic packaging bags are single-layered. This kind of bag is very thin and can be sealed tightly at low temperatures. When the temperature is high, the bag will be burnt. Therefore, the temperature needs to be tested repeatedly during sealing. When the temperature is reached, the bag will not be burnt, and the surface of the bag will be smooth. This is the appropriate temperature. Usually, this kind of bag is sealed with a foot.

2. Sealing methods for multi-layer composite baking food bags

Multi-layer composite baking food bags are a combination of multi-layer materials, making the bag thicker and PET heat-resistant. Therefore, such bags can withstand relatively high temperatures, usually reaching 200 degrees to be sealed. Of course, the thicker the bag, the higher the temperature. After testing, seal in batches during packaging to avoid unnecessary trouble during use.

The sealing of plastic packaging bags is temperature control. After temperature control, the seal is smooth and will not be damaged. Therefore, a suitable temperature needs to be tested during sealing to avoid mass production and waste.

Baking food bags use the principle of deoxygenation to effectively prevent food spoilage and maintain its color, aroma, taste, and nutritional value. Widely used in the food industry, so how to use baking food bags correctly?

I. Storage Precautions

Gaseous moisture in the air penetrates into the packaging material, and the permeability coefficient is closely related to the temperature. Generally speaking, the higher the temperature, the greater the permeability coefficient, and the more serious the penetration of the packaging material. Therefore, food in baking food bags should be stored at low temperatures. If stored at high temperatures, the breathability of the bag will be seriously affected, and the food will deteriorate. Vacuum-packed food is generally stored below 10℃.

II. Operational Considerations

1. First, pay attention to the heat sealing of the baked food bag. Be careful not to stick oil, protein, food residues, etc. on the seal to ensure that the seal can be completely heat-sealed.

2. When sterilizing vacuum packaging bags by heating, the sterilization temperature and time should be strictly controlled to avoid excessive internal pressure in the packaging bag due to high temperature, resulting in separation and rupture of the packaging bag seal.

3. Food vacuum packaging bags need to be completely emptied, especially fresh meat and unsolidified food, to prevent food in the vacuum packaging bag from deteriorating due to residual gas.