What are the requirements of food paper packaging?
In addition to ensuring food safety, paper packaging is also an important means to ensure the sensory quality of food, such as color, fragrance and taste. In the modern developed commercial field, paper packaging of Qingdao food also plays an important role in the promotion of food. Therefore, as the packaging of food, it should at least meet the following requirements:
1. Strength requirements:
Because the food can only reach the consumers after the completion of packaging through stacking, transportation, storage and other circulation processes, this requires that the food packaging has a certain strength and will not be damaged in the circulation process.
2. Requirements for impermeability:
The barrier requirements of food packaging are determined by the characteristics of the food itself, and different foods have different requirements for the barrier characteristics of their packaging. On the one hand, the barrier of food packaging ensures that all kinds of bacteria, dust, light, gas and water in the external environment cannot enter into the food in the package; on the other hand, it ensures that the water, grease and aromatic ingredients contained in the food do not penetrate outward, so as to ensure that the packaged food does not deteriorate. There are also some foods that require the packing materials to be selective in gas barrier. For example, by controlling the pore size of the materials, the packing materials can selectively pass through O2 and CO2, so as to control the respiratory intensity of the packed food and achieve the purpose of preserving the fruits and vegetables.
3. Safety and health:
While food packaging materials have necessary impermeability, they must ensure their own safety, non-toxic and non-volatile substances, that is to say, packaging materials themselves have stable organizational components. In addition, during the implementation of the packaging process, there will be no substances and chemical components that react with food ingredients. In the process of storage and transfer, chemical changes will not occur due to changes in climate and normal environmental factors.
4. Temperature resistance requirements:
In the process of food processing, most of them need to undergo heat treatment. Some of them need to undergo high temperature treatment after packaging, such as canned food and small food like cooking, some are hot filling, such as many hot filling drinks, and many of them have a long shelf life. If they reach or exceed one year, this kind of food stored at room temperature will inevitably go through hot summer, and they need to be kept above 300C continuously. All of these require food. The packaging of has certain temperature resistance. With the different food and processing technology, the requirements of temperature resistance are also different.
5. Requirements for Lightfastness:
Light is very harmful to the maintenance of food quality and nutrition. In particular, ultraviolet irradiation will oxidize the oil in the food and lead to rancidity, oxidize the natural pigment in the food and change the color of the food. It will promote the loss of vitamin B and vitamin C in the food. In addition, the light will also cause the physical and chemical changes such as amino acid decomposition, sugar melting, which are not conducive to the maintenance of food quality. Therefore, for a good food packaging, the lightfastness is also very important.
6. Safety requirements:
As food is a daily consumer product, it can only reach consumers through circulation, which requires that food packaging should be suitable for placement, handling, display and convenient purchase, not with edges or burrs that hurt people, and try to have special portable devices to facilitate purchase. Also consider that when opening the package, even if it is not handled correctly, it will not cause harm to consumers.
7. Promotional requirements:
Promotion is one of the important functions of food packaging. Promotional requirements of food packaging materials should be easy to print, easy to shape, easy to color, light weight and so on. In this respect, plastics undoubtedly have unique advantages.
8. Convenience requirements:
Convenient packaging is often an important reason for consumers to choose a certain food. The convenience of packaging includes the convenience of use, such as the packaging of condiments, the convenience of form, such as the newly launched milk flakes (dry milk powder); the convenience of places, such as the travel and leisure food for eating out, with the characteristics of light weight, small size, convenient opening; the convenience of carrying, measurement, operation and selection.
