As a supplier of Barrier Shrink Bags, I’ve witnessed firsthand the growing demand for these products in various industries. One of the most frequently asked questions from our customers is about the barrier performance of Barrier Shrink Bags against oxygen. In this blog, I’ll delve into the science behind this crucial aspect, exploring how these bags work, what factors affect their oxygen barrier performance, and why it matters for different applications. Barrier Shrink Bag
Understanding the Basics of Oxygen Barrier Performance
Oxygen is a major enemy when it comes to preserving the quality and shelf – life of many products. It can cause oxidation, which leads to spoilage, discoloration, loss of flavor, and a reduction in nutritional value. Barrier Shrink Bags are designed to minimize the ingress of oxygen, creating a protective environment for the products inside.
The oxygen barrier performance of a Barrier Shrink Bag is typically measured by its Oxygen Transmission Rate (OTR). OTR is defined as the volume of oxygen that passes through a given area of the film in a specified time under specific conditions of temperature and humidity. The lower the OTR, the better the oxygen barrier performance of the bag.
How Barrier Shrink Bags Achieve Oxygen Barrier Performance
Barrier Shrink Bags are usually made from multi – layer films. These films are composed of different polymers, each with its own unique properties. One of the key polymers used in creating an oxygen barrier is ethylene vinyl alcohol (EVOH). EVOH has excellent oxygen barrier properties, especially in low – humidity environments. It forms a thin layer within the multi – layer film structure, acting as a physical barrier to oxygen molecules.
Another common approach is to use metallized films. Metallized polyester or polypropylene films have a thin layer of metal, usually aluminum, deposited on the surface. This metal layer reflects and scatters oxygen molecules, preventing them from passing through the film. The combination of different layers in a Barrier Shrink Bag, such as a layer of EVOH and a metallized layer, can significantly enhance the overall oxygen barrier performance.
Factors Affecting Oxygen Barrier Performance
Temperature and Humidity
Temperature and humidity have a significant impact on the oxygen barrier performance of Barrier Shrink Bags. As the temperature increases, the mobility of oxygen molecules also increases, leading to a higher OTR. Similarly, high humidity can cause the EVOH layer to absorb moisture, which reduces its oxygen barrier effectiveness. Therefore, it’s important to consider the storage and transportation conditions when evaluating the oxygen barrier performance of these bags.
Film Thickness
The thickness of the Barrier Shrink Bag also plays a role in its oxygen barrier performance. Generally, thicker films have lower OTR values because there is a longer path for oxygen molecules to travel through. However, increasing the film thickness also has its drawbacks, such as higher costs and reduced flexibility.
Seal Integrity
The integrity of the seals on the Barrier Shrink Bag is crucial for maintaining its oxygen barrier performance. A poorly sealed bag can allow oxygen to enter, even if the film itself has excellent barrier properties. Therefore, proper sealing techniques, such as heat sealing, are essential to ensure a tight and reliable seal.
Importance of Oxygen Barrier Performance in Different Applications
Food Industry
In the food industry, oxygen barrier performance is of utmost importance. Many food products, such as meats, cheeses, and snacks, are highly susceptible to oxidation. By using Barrier Shrink Bags with good oxygen barrier properties, food manufacturers can extend the shelf – life of their products, reduce waste, and maintain the quality and freshness of the food. For example, a high – quality Barrier Shrink Bag can prevent the oxidation of fats in meat, which would otherwise lead to rancidity and off – flavors.
Pharmaceutical Industry
The pharmaceutical industry also relies on Barrier Shrink Bags with excellent oxygen barrier performance. Many medications are sensitive to oxygen, which can degrade their effectiveness. By using oxygen – barrier packaging, pharmaceutical companies can ensure the stability and potency of their products throughout their shelf – life.
Electronics Industry
In the electronics industry, oxygen can cause corrosion and oxidation of electronic components. Barrier Shrink Bags with good oxygen barrier performance can protect these components during storage and transportation, preventing damage and ensuring their proper functioning.
Testing and Certification
To ensure the quality and performance of our Barrier Shrink Bags, we conduct rigorous testing. We use standardized testing methods to measure the OTR of our bags under different conditions. These tests are carried out in accredited laboratories to ensure accuracy and reliability.
In addition to in – house testing, we also seek third – party certifications. Certifications such as ISO 15106 – 2 for oxygen transmission rate testing provide an independent verification of the oxygen barrier performance of our products. This gives our customers confidence in the quality and performance of our Barrier Shrink Bags.
Conclusion
The oxygen barrier performance of Barrier Shrink Bags is a critical factor in many industries. By understanding how these bags work, what factors affect their performance, and why it matters, our customers can make informed decisions when choosing the right packaging solution for their products.
At our company, we are committed to providing high – quality Barrier Shrink Bags with excellent oxygen barrier performance. Our multi – layer films are carefully designed and manufactured to meet the specific needs of different industries. Whether you are in the food, pharmaceutical, or electronics industry, we have the right solution for you.
Polyvinylidene Chloride Inner Printing Film If you are interested in learning more about our Barrier Shrink Bags or would like to discuss your specific packaging requirements, please feel free to contact us. We look forward to working with you to find the best packaging solution for your products.
References
- ASTM D3985 – Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor.
- ISO 15106 – 2 – Plastics — Film and sheeting — Determination of gas transmission rate — Part 2: Coulometric detection method.
- Robertson, G. L. (2012). Food Packaging: Principles and Practice. CRC Press.
Sinosealed Packaging Solutions Limited
With a professional production team, we are one of the most experienced barrier shrink bag manufacturers and suppliers in China. Please rest assured to buy high quality barrier shrink bag for sale here from our factory. For price consultation, contact us.
Address: Luohe City, Henan Province, China
E-mail: contact@barrierpackage.com
WebSite: https://www.barrierpackage.com/
