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What are the conditions needed to talk about food packaging film

by:Kolysen     2021-01-01

because food packaging film is mainly using the object, a wide range of different requirements, packaged content from birth to practice, from low to high temperature, from easy to corrupt fruit to hard nuts, from vacuum bags to inflatable bags, basic covers the scope of the composite bags.

1, the separated requirements; Most food is rich in oil, oil is the oxidation, so strict in oxygen resistance, to increase or decrease the moisture inside the food packaging film requirement is high.

2, water activity; Foods contain certain moisture content, when selected packaging materials, in food processing conditions under the condition of invariable, formulation, food and water content changed little. When conditions change, will directly affect the raw water activity value of the food, and water is one of the important factors that cause food spoilage, as long as there is a certain water content, microbial growth. To different moisture content in food, different materials and ways should be used.

a, low water activity of food. Bacteria are not in the water activity below 0. 65 food to survive, to the water activity below 0. In terms of 60 dry food, as long as can stay dry for a long time can avoid food deterioration caused by bacteria.

b, the activity of water medium food. The water activity in 0. 60 - 0. 90 in the middle of the water in terms of food, food quality method, vacuum packing, nitrogen gas packing, deoxidizer packaging, etc. , placed the fat in the food with the oxidation, food color, etc.

c food and high water activity. The water activity in 0. 9 - 1. 0 water department more food, maintain quality methods: above 100 ℃ heating sterilization, using hydrogen peroxide, such as radiation sterilization of aseptic packaging.

3, food packaging film, inflatable packaging effect. Inflatable packaging's role is to extend shelf life, the kinds of inflatable puts forward different requirements for packaging.

4, grain packaging requirements. Grain with respiration, different grain for oxygen adsorption ability difference is big, in the each grain bag, can use in food packaging film good separated into oxygen method to better preserve food inflatable bag.

5, vacuum requirements. The vacuum cut off oxygen, moisture, both can guarantee material quality and make the goods look nice, easy.


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