How does high barrier film maintain the vacuum in vacuum packaging?

Hey there! As a supplier of high barrier film, I often get asked about how our product maintains the vacuum in vacuum packaging. It's a super interesting topic, and I'm stoked to share all the deets with you.

First off, let's talk about what high barrier film is. High barrier film is a specialized type of packaging material designed to block the passage of oxygen, moisture, light, and other gases. This makes it ideal for vacuum packaging, where the goal is to create an airtight environment to preserve the quality and freshness of the packaged product.

So, how does high barrier film actually maintain the vacuum in vacuum packaging? Well, it all comes down to its unique structure and properties. Most high barrier films are made up of multiple layers, each with a specific function. The outer layer is usually a tough, protective layer that helps to prevent damage to the film during handling and transportation. The middle layer is the barrier layer, which is responsible for blocking the passage of oxygen, moisture, and other gases. The inner layer is a sealant layer that helps to create a strong, airtight seal around the packaged product.

One of the key properties of high barrier film is its low oxygen transmission rate (OTR). OTR is a measure of how much oxygen can pass through a given area of the film in a given amount of time. The lower the OTR, the better the film is at blocking oxygen. High barrier films typically have an OTR of less than 1 cc/m²/day, which means that very little oxygen can pass through the film. This helps to prevent the growth of aerobic bacteria and other microorganisms, which can cause spoilage and degradation of the packaged product.

Another important property of high barrier film is its low moisture vapor transmission rate (MVTR). MVTR is a measure of how much moisture can pass through a given area of the film in a given amount of time. The lower the MVTR, the better the film is at blocking moisture. High barrier films typically have an MVTR of less than 1 g/m²/day, which means that very little moisture can pass through the film. This helps to prevent the growth of mold and mildew, which can also cause spoilage and degradation of the packaged product.

In addition to its low OTR and MVTR, high barrier film also has excellent mechanical properties. It is strong, flexible, and resistant to punctures and tears. This makes it ideal for vacuum packaging, where the film needs to be able to withstand the pressure of the vacuum without breaking or leaking.

Now, let's talk about some of the different types of high barrier films that we offer as a supplier. One of our most popular products is our Moisture Barrier Film. This film is specifically designed to block the passage of moisture, making it ideal for packaging products that are sensitive to moisture, such as food, pharmaceuticals, and electronics. It has a low MVTR and excellent mechanical properties, which makes it strong and durable.

Another popular product is our Foil Roll Stock. This film is made up of multiple layers, including a layer of aluminum foil. The aluminum foil provides an excellent barrier to oxygen, moisture, and light, making it ideal for vacuum packaging. It has a low OTR and MVTR, and it is also very strong and resistant to punctures and tears.

We also offer a range of other high barrier films, including Moisture Barrier Film, which is designed to block the passage of both oxygen and moisture. This film is ideal for packaging products that are sensitive to both oxygen and moisture, such as coffee, tea, and snacks.

In conclusion, high barrier film is an essential component of vacuum packaging. Its unique structure and properties allow it to maintain the vacuum in vacuum packaging, which helps to preserve the quality and freshness of the packaged product. As a supplier of high barrier film, we offer a range of products that are designed to meet the specific needs of our customers. Whether you're packaging food, pharmaceuticals, or electronics, we have the right high barrier film for you.

If you're interested in learning more about our high barrier films or if you have any questions about vacuum packaging, please don't hesitate to contact us. We'd be happy to help you find the right solution for your packaging needs.

References

• Packaging Technologies and Materials, by John W. O'Brien
• Flexible Packaging: Technologies for Succes, by John W. O'Brien and Linda K. Mason