Fruit and vegetable chips are a general term for fruit chips and vegetable chips, which are all kinds of fruit and vegetable chips produced by vacuum frying and dehydration with fruits and vegetables as the main raw materials.
The vacuum technology used in fruit and vegetable chips has a very simple application principle in food drying, that is, under the condition of negative pressure, the boiling point of water is reduced, which increases the speed of water evaporation. And due to the decrease of temperature, the drying process has little change to the properties of food. The application of vacuum technology in food drying started in the 1940s. After a period of development, from the late 1950s to the early 1970s, freeze-drying technology was mainly used to produce food for astronauts. In 1976, Japanese scholars Yamazaki, Tatsuo, etc. disclosed a method for preparing fried and dehydrated apples in a vacuum and low temperature state. This is the beginning of the production technology of fruit and vegetable chips. Simply put, its products are still a kind of dehydrated fruit and vegetable products.
The product is deep-fried under vacuum at low temperature, the concept of low temperature is low temperature relative to normal frying temperature, not true low temperature. Some people call it a vacuum low temperature oil bath, which is playing with words and cannot change the essence of fried food. As fried food, there are special requirements for its packaging. It should be protected from light, moisture, and placed in a cool place. Some manufacturers sell their products in transparent pet bottles, which itself violates the product characteristics. It will lead to short shelf life of the product, easy fading and corruption. Packaging made according to its product characteristics should be made of opaque, airtight material. To prevent it from breaking, air-filled packaging should be used. And the inflated gas should be nitrogen and carbon dioxide without oxidizing effect. Only such packaging can extend the shelf life and reduce the cost of sales. In addition, from the packaging point of view, the weight of some products is a little too large, and the proportion of these products will decrease in the future.
