Are frozen vacuum bags the same as quick-frozen vacuum bags?

2024-10-08

We usually think that frozen vacuum bags and quick-frozen vacuum bags are the same, because they can pack frozen food, which also gives us the illusion that the two bags are the same. However, from a more professional perspective, they differ in terms of performance, material or use.

1, first of all, in terms of performance, the frozen vacuum bag refers to the storage period and shelf life of the food it contains by refrigeration under freezing conditions; The quick-freezing vacuum packaging bag is used to extend the freshness of the food in the quick-freezing condition.

2, secondly, in terms of use, frozen vacuum bags are generally suitable for fresh meat, meat food and seafood; Quick-frozen vacuum packaging bags are widely used. It can be used to package not only fresh meat, meat products and seafood, but also pasta, fruits and even vegetables.

3, in the choice of packaging materials, frozen vacuum packaging bags only need to choose cold and water resistant film, and the film of frozen vacuum packaging bags not only need cold and water resistant, but also need the film barrier.

Quick-frozen products generally use aluminized vacuum bags, aluminum foil vacuum bags or other nylon composite vacuum bags. At this time, you can also choose according to the requirements of the customer. Different materials have different properties. For example, aluminum plating is highly decorative and aluminum foil has good shading and moisture resistance. You can choose different materials according to the requirements of the product.

 

Vacuum bag

 

The sealing loosening phenomenon of vacuum packaging machine is mainly reflected in three aspects: the sealing part of the vacuum bag can not be sealed; Under the pressure of the sealing knife, although the mouth of the bag is sealed, if it is slightly squeezed or torn, it will break again; When the seal is peeled off, half of it is sealed firmly and half of it is separated. The sealing quality of this vacuum bag is still not up to standard, because the contents are prone to leakage after extrusion during storage and transportation.

The main reasons for the failure of vacuum bag seal are as follows:

1. Insufficient heat sealing temperature. Generally with obrbr as the lining of the composite bag, when the total thickness of the bag is 80 ~ 90μM, the heat sealing temperature should reach 170 ~ 180℃; The total thickness of the bre-as lined composite bag is 85 ~ 100μM, and the temperature should be controlled at 180 ~ 200℃. As long as the total thickness of the bag increases, the heat sealing temperature must be increased accordingly.

2, the heat sealing speed is too fast. Seal failure is also related to the speed of the sealing machine. If the speed is too fast, the seal will be transferred to the cold-pressed part by the traction roller for cooling treatment, and then it can be heated, which naturally cannot meet the quality requirements of the thermal seal.

3, the pressure of the cold pressing rubber wheel is not suitable. The cold-pressed rubber wheel has an upper and lower pressure, and the pressure between the two should be moderate, and only when the clamping pressure is needed to adjust the pressure.

4, the quality of the vacuum bag is wrong. Seal failure is also related to the quality of the vacuum bag. If the corona treatment of the composite lining is uneven, the effect is not good, and it happens to appear at the seal, it shall not be sealed. This is rare, but when it does happen, the product will definitely be scrapped.

5, if the sealing part of the vacuum bag has water and dirt, it will also lead to poor sealing. In short, to solve the problem of a poor seal, it is generally possible to appropriately increase the heat sealing temperature, reduce the heat sealing speed, and increase the pressure of the cold pressed rubber wheel.

Hunan Kexin Packaging Co., Ltd.
sale@kxpackage.com
86-19174886769
RM1124,Bld 1, Jinqiao International Weilai Town, Changsha, China
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