Vacuum packaging is a common way of food preservation, which is convenient, healthy and natural, and is loved by consumers. Our common vacuum packaging includes cooked food, rice, nuts, etc., then you have seen vacuum packaging powder? Can the powder be vacuum-packed?
What is vacuum packaging?
Vacuum packaging refers to the removal of the air in the bag, sealed, so that the food in the bag is isolated from the outside world. In the vacuum state, the growth of aerophobe microorganisms is slowed down or inhibited, which reduces the degradation of protein and the oxidative rancidity of fat. In addition, after vacuum packaging, lactic acid bacteria and anaerobic bacteria proliferation, pH reduced to 5.6 ~ 5.8, further inhibit the growth of other bacteria, thus extending the storage life of the product. Vacuum packaging generally needs to be combined with some other commonly used anti-corrosion methods to achieve good preservation effects, such as: dehydration, adding spices, sterilization, freezing and so on.
Can vacuum packaging pack powder?
The powder can be vacuum-packed, but in most cases this is not necessary and requires the use of special equipment.
The main function of vacuum packaging is to isolate oxygen, which is simply to bag the food first → use a pump to pump air → seal. Therefore, solid, pharmaceutical, semi-fluid, electronic components, etc., are suitable for this packaging method. And most of the powder, because of the texture, the gap will be filled with air, which makes it difficult to be a good vacuum.
Moreover, most vacuum packaging products are afraid of oxygen, and most powder products are not so afraid of oxygen, so there is no need for vacuum packaging.
Secondly, mechanical equipment, our commonly used flat vacuum packaging machine is not suitable for packaging powder, because the product packaging bag is lying flat, and the powder particles are small and light weight when the machine works, the powder will be extracted resulting in waste of materials, and the extracted powder is easy to inhale the vacuum pump, the main component of the vacuum packaging machine, which will cause the vacuum pump to affect the normal work of the machine for a long time.
Vacuum packaging powder, you need to choose a vertical vacuum packaging machine, it works when the bag is placed upright, the powder will not be sucked out when pumping, it will not cause the blockage of the vacuum pump, the equipment is mainly used for iron powder, flour, metal powder vacuum packaging is also suitable for other objects vacuum packaging.
In addition, there are some products are not suitable for vacuum packaging.
1. Fresh vegetables. Although vacuum packaging can play a role in extending the shelf life, but for fresh vegetables and fruits is not able to achieve this function, fresh vegetables need to absorb carbon dioxide in the air for photosynthesis, vacuum will make vegetables isolated from carbon dioxide, so that vegetables rot more quickly.
2. Angular objects. Angular items in the process of vacuum packaging will not have any problems, the key is in the vacuum after the completion of the placement period and transportation period, the friction between items and items will make the bag leak, thus losing the meaning of vacuum packaging, so angular items are not recommended vacuum packaging.
