Fresh fruits and vegetables are rich in nutrients and are the main source of microorganisms and minerals needed by the human body. However, the production of fruits and vegetables has strong seasonality, high water content, freshness and tenderness but is perishable. Fruits and vegetables have a short shelf life at room temperature, so it is particularly important to use effective fruit and vegetable preservation techniques to prolong the shelf life of fresh fruits and vegetables. Out of consideration for food safety, consumers tend to choose fresh fruits and vegetables that are not treated with chemical reagents. On the other hand, the modified atmosphere packaging (Map Trays) fresh-keeping technology is precisely to maintain the high quality of fruits and vegetables without using chemical reagents. , A modern fruit and vegetable preservation technology that effectively prolongs the shelf life.
Modified atmosphere packaging (MAP) is one of the main products of Tipack Group, and Tipack uses multi-layer co-extrusion high barrier technology for them.
Fresh-keeping mechanism of modified atmosphere packaging
Modified atmosphere packaging preservation technology uses special packaging materials, fills a certain proportion of mixed gas into the packaging according to needs, and inhibits the growth of microorganisms by changing the gas composition around fruits and vegetables, delaying the metabolism of fresh fruits and vegetables, so as to achieve the effect of freshness preservation .
There are two main types of modified atmosphere packaging Pp Map Tray:
spontaneous modified atmosphere packaging and controller modified atmosphere packaging. Spontaneous modified atmosphere packaging uses the balance between the respiration of fruits and vegetables in the packaging film and the air permeability of the film to form a microenvironment with high CO2 and low O2 in the packaging, thereby inhibiting the metabolism of fruits and vegetables;
into a vacuum state and filled with modified gas. According to the physiological characteristics of different fruits and vegetables, we choose the correct type and proportion of protective gas to fill the packaging, and then use the selective permeability of packaging materials and the respiration of fruits and vegetables to form a gas environment in the packaging that is more suitable for keeping fruits and vegetables fresh. In order to effectively reduce the physiological consumption of fresh fruits and vegetables and prolong the preservation period of fruits and vegetables. At present, the modified atmosphere packaging preservation technology Evoh Barrier Map Tray mainly refers to the controlled atmosphere packaging.
Key technology of modified atmosphere packaging for preservation
The key to the fresh-keeping technology of modified atmosphere packaging is to find the best gas type, ratio and packaging materials suitable for the modified atmosphere storage of fruits and vegetables.
Main shielding gas
The protective gases used in modified atmosphere packaging mainly include: N2, O2, and CO2. These three gases are mixed in an appropriate ratio and then filled into the fruit and vegetable packaging, so that they can play their respective functions, so as to achieve the effect of keeping fruits and vegetables fresh.
Advantages of modified atmosphere packaging technology for fruits and vegetables
Modified atmosphere packaging preservation technology can adapt to the packaging requirements of different fruits and vegetables by adjusting the gas combination ratio, so that fruits and vegetables can "breathe" freely in the packaging materials, while extending the freshness period of fruits and vegetables, it can truly ensure the appearance, taste, and quality of fresh fruits and vegetables. nutritional value. This technology can also commercialize harvested fruits and vegetables, minimize the loss of harvested fruits and vegetables in the process of storage, transportation, circulation and sales, improve the competitiveness of product appearance, and have high economic benefits.
Application and development prospect of modified atmosphere packaging technology for fruits and vegetables
Modified atmosphere packaging technology mainly relies on the respiration of fruits and vegetables and the air permeability of the packaging film to maintain balance, which is more suitable for transportation, circulation and supermarket sales. Modified atmosphere packaging preservation technology is an important high-tech in the process of storage and transportation of fruits and vegetables, which is of great value for development and promotion. Modified atmosphere packaging technology can also be combined with other fresh-keeping technologies, such as radiation, vacuum pre-cooling, etc., to work together on fresh fruits and vegetables, so that various fresh-keeping technologies can achieve better fresh-keeping effects under the cooperation of each other.
