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PA plastic, as a high-performance engineering plastic, has shown extraordinary application potential in the field of food packaging with its unique molecular structure and excellent physical properties. In particular, PA plastic performs well in gas barrier and can effectively block the penetration of gas molecules such as oxygen and carbon dioxide. This feature is crucial for jelly and other foods that are easily oxidized and perishable. Jelly is rich in water and sugar, which is an ideal environment for microbial growth and oxidation. The presence of oxygen will accelerate the oxidation of fats, vitamins and pigments in jelly, resulting in darkening of color, poor taste, and even bad odor. The penetration of carbon dioxide may also affect the pH value and flavor stability of jelly.
The high barrier performance of PA plastic is like a solid barrier, isolating jelly from harmful gases such as oxygen and carbon dioxide in the outside world. This not only slows down the oxidation process of jelly, but also maintains the original color, taste and flavor of jelly, greatly extending the shelf life of the product. However, can the high barrier performance of PA plastic alone ensure that jelly always remains in the best condition during long-term storage and transportation? The answer is obviously no. Because in addition to gas barrier, the oxygen content inside the package is also a key factor affecting the preservation effect of jelly.
Vacuum packaging technology, as one of the important means of food preservation, creates a low-oxygen or even oxygen-free environment by extracting the air inside the package. This technology not only effectively slows down the oxidation process of food, but also reduces the growth opportunities of microorganisms, thereby extending the shelf life of food. In jelly packaging, the application of vacuum packaging technology is particularly important. Jelly, as a food rich in water and sugar, is extremely susceptible to microbial contamination and oxidation. Vacuum packaging provides a safer storage environment for jelly by reducing the oxygen content in the package.
However, vacuum packaging is not omnipotent. In the process of extracting air, the air permeability and sealing of the packaging material itself will directly affect the durability of the vacuum effect. If the gas barrier performance of the packaging material is poor, even if vacuum packaging technology is used, it cannot effectively prevent the penetration of external oxygen. Therefore, when selecting vacuum packaging materials, their gas barrier properties must be considered. PA plastic, with its excellent gas barrier ability, has become an ideal choice for vacuum packaging film.
When PA plastic is combined with vacuum packaging technology, a nearly perfect preservation solution comes into being. The high barrier properties of PA plastic provide an almost airtight protective layer for jelly, isolating the jelly from the outside environment. The vacuum packaging technology creates a low-oxygen or even oxygen-free environment by extracting the air in the package, further slowing down the oxidation process of the jelly. This combination not only extends the shelf life of the jelly, but also maintains the original color, taste and flavor of the jelly.
In practical applications, the production process of PA plastic jelly sealed vacuum packaging film needs to undergo strict process control. First, high-quality PA resin is selected as the main raw material to ensure the basic performance of the product. Then, through process steps such as extrusion molding, printing and lamination, a packaging film with a multi-layer structure is formed. During the lamination process, the PA film is closely combined with other materials (such as PE, PET, etc.) to form a composite film with excellent overall performance. Finally, after ripening and slitting, a PA plastic jelly sealed vacuum packaging film that meets the use requirements is obtained.
During use, the PA plastic jelly sealed vacuum packaging film performs well. Its high barrier properties effectively prevent the penetration of gases such as oxygen and carbon dioxide, providing a safe storage environment for jelly. At the same time, the application of vacuum packaging technology further reduces the oxygen content in the package and slows down the oxidation process of the jelly. This combination not only extends the shelf life of the jelly, but also improves the shelf stability of the product.
As consumers pay more and more attention to environmental protection and sustainable development, PA plastic jelly sealed vacuum packaging film is also facing new challenges and opportunities. On the one hand, traditional PA plastic materials may have a certain impact on the environment during production and use. Therefore, the development of environmentally friendly and degradable PA plastic materials has become a future development trend. On the other hand, with the continuous advancement and innovation of packaging technology, the performance and quality of PA plastic jelly sealed vacuum packaging film will also be further improved. For example, by improving the production process and formula design, the air permeability and sealing of the packaging film can be improved; by introducing intelligent packaging technology, the packaging film can realize real-time monitoring and feedback of food status.
