The freeze-drying technology began in the early 20th century when the purpose of research and development was to allow astronauts to eat fresh and nutritious food even in space. After years of intensive research and development by scientists, this top food processing technology-"lyophilization technology" was born in the 1940s, and was then widely used in the aerospace field of developed countries such as Russia and the United States technology.
What is freeze-dried food?
Freeze-drying technology is the process of dehydrating food in a very low-temperature environment under vacuum. The water will be directly converted from solid to a gaseous state, and no intermediate liquid state conversion is required by sublimation. During this process, the product will maintain its original size and shape, minimize cell rupture, and remove moisture to prevent food from spoiling at room temperature. The freeze-dried product has the same size and shape as the original frozen material, has good stability, and can be reconstructed and restored when placed in water. When the freeze-drying process is applied to pet food, its nutritional value can be retained to the greatest extent, and the color, taste, volume, texture, and food raw materials are not significantly different.
Freeze-dried pet food generally uses pure natural livestock and poultry liver, fish, shrimp, fruits, and vegetables as raw materials, does not add any preservatives and pigments and uses a vacuum freeze-drying process to completely kill possible The microorganisms present are very safe for pets. In addition to home-made pet foods, freeze-dried pet treats are the freshest, least processed, and can ensure healthy and balanced nutrition.
Advantages of freeze-dried pet food
The vacuum freeze-drying process is the drying process under the condition of extremely low temperatures and a high degree of vacuum. During the processing, the food materials are basically in an oxygen-free environment and completely protected from light. The heat denaturation is small, which effectively maintains the fresh food Color, fragrance, taste, shape, and maximize the preservation of various vitamins, carbohydrates, proteins, and other nutrients in food ingredients, chlorophyll, biological enzymes, amino acids, and other nutrients and flavor substances.
After dehydration, fresh vegetables and fruits are more sweet and delicious due to their concentrated flavor and sugar. The taste of fresh meat after dehydration is also more delicious, improving the palatability.
During the freeze-drying process, the solid ice crystals sublimate into water vapor and leave gaps in the food ingredients. Therefore, the vacuum freeze-dried pet food has a dry sponge-like porous structure and therefore has ideal instant solubility and fast and almost complete Water-based. As long as the right amount of water is added to the food, it can be restored to almost fresh taste in a few seconds to a few minutes.
Super long freshness, easy to use
Freeze-dried pet food is completely dehydrated and light-weight, so it is very convenient to use or carry, and most freeze-dried pet foods are vacuum-packed or nitrogen-filled, protected from light. The shelf life of this sealed package at normal temperature can be as long as 3-5 years or even longer.
Compared with traditional meat pet food, especially compared with raw food, freeze dried dog treats do not need to be stored in the refrigerator so that it eliminates the need to understand the freezing step.
Freeze-drying is the sublimation of moisture, that is, the moisture in the food is directly changed from the solid to the gaseous state, so in the drying process, the physical structure of the foodstuff is maintained to the maximum extent, and the latter is to change the moisture from the liquid to the gaseous state. The best method so far is vacuum freeze-drying. Because under low temperature and low pressure, the physical structure of the food material is basically not affected, and it will not penetrate due to the humidity gradient existing inside and outside the cell wall, causing the surface pores to shrink or the internal dehydration to dry out, and the sublimation point rises under low-pressure vacuum High, so the drying efficiency is higher.
Freeze Dried Dog Treats