What are the main factors affecting the barrier performance of vacuum packaging bags?

The main function of vacuum packaging bags is to remove oxygen, block air from contacting the food inside the packaging, and help prevent food spoilage. The barrier properties of vacuum packaging materials directly affect the storage life and taste changes of food. So what are the main factors affecting the barrier performance of vacuum packaging bags?
What are the main factors affecting the barrier performance of vacuum packaging bags? The barrier performance of vacuum packaging bags is mainly affected by the following factors:
1. Material itself: Different plastic materials have different barrier properties, such as nylon and EVOH, which have relatively better barrier properties.
2. Thickness: Generally speaking, the thicker the thickness, the better the barrier performance.
3. Multi layer structure: The design of multi-layer composite structure can enhance the overall barrier performance.
4. Processing technology: The quality of composite technology can affect the tightness of the bonding between each layer of materials, thereby affecting the barrier properties.
5. Temperature and humidity: In higher temperature and humidity environments, the barrier performance may decrease.
6. Additives: Some additives added may have an impact on barrier properties.
7. Surface treatment: Proper surface treatment can enhance barrier properties.
8. Production quality control: Poor quality control during the production process may result in defects in the bags, affecting their barrier performance.
 
How to evaluate the barrier performance of vacuum packaging bags? Here are some common methods for evaluating the barrier performance of vacuum packaging bags:
1. Oxygen permeability test: using equipment to measure the amount of oxygen that passes through the packaging bag per unit time, which is an important indicator for evaluating the oxygen barrier performance.
2. Water vapor transmission rate test: detects the amount of water vapor that passes through the packaging bag under specified conditions, reflecting the ability to block water vapor.
3. Differential pressure test: Evaluate barrier properties by measuring the passage of gas through the packaging bag under a specified pressure differential.
4. Determination of permeability coefficient: Calculate the permeability coefficient of a certain gas or substance in the packaging bag material to understand its barrier performance.
5. Comparative experiment: Compare different packaging bags containing the same items under the same conditions, and observe the differences in their protective effects on the contents over a period of time.
6. Long term storage observation: After packaging the item, store it for a longer period of time and observe the changes in the item to indirectly determine its barrier performance.
7. Institutional testing: Entrust relevant testing agencies to conduct comprehensive testing and evaluation in accordance with relevant standards.
The above introduction about the barrier performance of vacuum packaging bags is organized by Jinde Packaging. Jinde Packaging has been focusing on the research and production of vacuum packaging bags for 11 years. Jinde Packaging has its own import and export rights for vacuum packaging bags, exporting to Europe, America, Africa, and Southeast Asian countries. We can provide customers with design solutions and template free sampling services, focusing on making every bag well. We offer free returns and exchanges for any defects! Hotline: 15902743510