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Modified atmosphere packaging(MAP Trays) means that in a certain closed package, through various adjustment methods, the gas in the package is different from the normal atmospheric composition, so as to inhibit the physiological and biochemical reactions, physical reactions, oxidative browning, etc. that cause food quality deterioration. So as to achieve the purpose of prolonging food preservation and long-term preservation. Generally, a continuous thermal inflatable machine is used to inflate one or more gases such as CO2, N2, O2 into the package in a certain proportion, and the inflatable packaging is completed after being hot-pressed and sealed.
A large number of practices have proved that the application of reasonable Fresh Meat MAP Tray packaging, especially the appropriate proportion of filling gas, not only helps to limit the growth of microorganisms in the packaging, but also has positive significance for alleviating the over-ripening and oxidation of the contents. Fish, seafood, fresh fruits and vegetables and baked snacks are three types of typical foods suitable for modified atmosphere packaging.
The effect of modified atmosphere PP MAP Tray packaging is mainly reflected in three aspects:
(1) antibacterial effect;
(2) for fresh fruits and vegetables, inhibiting respiration and maturity;
(3) maintain the original taste and shape of food, especially baked goods, and reduce the peculiar smell caused by oil oxidation.
From food packaging to transportation and storage, the effect of modified atmosphere packaging is restricted by many factors, including the selectivity of CO2 bacteriostasis, the concentration of CO2, and the performance of modified atmosphere packaging materials. After the modified atmosphere packaging is completed, the composition and content of the internal gas will remain stable for a period of time. With the extension of the product storage time, the content of O2, CO2 or N2 in the package will gradually change, which will affect the original packaging effect, and even the product's quality. quality.
In general, the reason for the change of gas content mainly comes from the infiltration and leakage of gas. Gas permeation means that the gas enters the surface of the packaging material from the high concentration side and diffuses to the low concentration side. The gas infiltrated/exuded through this channel has a long-term and slow influence on the gas composition in the package, and its permeation rate depends on the barrier properties of the packaging material. Leakage refers to the entry or escape of gas through tiny pores or cracks in the heat-sealed portion of the package, resulting in a dramatic change in gas content.
Whether it is gas infiltration or leakage, it will affect the change of the content of each gas component in the modified atmosphere packaging, thereby affecting the quality of the product. Therefore, companies have also adopted a variety of gas control methods, such as the use of high-barrier packaging materials to slow the penetration of gas. Since CO2 plays a major role in modified atmosphere packaging, the selected packaging materials should show a good barrier effect on CO2.
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Main Product:
PVDC Shrink Bag,
PVDC Shrink Film,
Plastic Tray ,
Heat Shrink Bag,
MAP Tray,
Meat Tray
