This article introduces VE707, a transparent barrier film suitable for high‑temperature retort applications.
Growing Market for Retort Food
Retort processing is a sterilization method that heats sealed food products under high temperature and pressure. The processed food market continues to expand year by year, with instant and retort foods showing particularly strong growth.
This trend is driven by increasing demand for convenient home meals and emergency stockpiling.
Globally, retort foods are gaining attention for their convenience, shelf stability, and environmental adaptability, and further market growth is expected.
Pros and Cons of Retort Processing
Retort processing offers many advantages, such as high safety and long shelf life.
However, the high-temperature treatment can negatively affect nutritional value and flavor.
To minimize these effects, short-time and high-temperature processing is effective—but this raises challenges for packaging durability.
Traditionally, aluminum foil has been widely used as a barrier material for retort packaging due to its excellent preservation properties.
However, with rising environmental awareness and the need for microwave compatibility, the industry is shifting toward aluminum-free solutions, increasing demand for transparent barrier films.
Ecosyar™ VE707: Durable Against High-Temperature Retort and Flexing
Our Ecosyar™ series features the world’s only dual inorganic transparent vapor-deposited film, combining silica and alumina.
Among the product lineup, VE707 is a high-performance barrier film designed for retort applications, offering excellent resistance to heat, humidity, and flexing.
Even under harsh sterilization conditions—such as high-temperature, long-duration retort processing—VE707 maintains its barrier performance.
It also prevents barrier degradation caused by pinholes in vacuum-degassing packaging.
The chart below shows the barrier performance of VE707 before and after retort treatment. Even at 140℃, the film retains its barrier properties.
Visualizing Flex Resistance: Oxygen Transmission Test Using Methylene Blue
To visualize the flex resistance of the packaging material, we conducted an oxygen transmission test using a unique method.
A pouch filled with wooden balls was vacuum-sealed and subjected to retort processing.
After retort-processing, we enclosed a methylene blue solution that changes color upon exposure to oxygen in the pouch.
This setup allowed us to observe oxygen ingress caused by pinholes or material degradation.
As a result, VE707 demonstrated the lowest oxygen transmission rate among the tested samples, confirming its superior barrier performance even under high-temperature and flexing conditions.
Multi-purpose Barrier Film for Demanding Applications
As demonstrated, VE707 offers exceptional resistance to harsh conditions, making it suitable for a wide range of applications—from dry food packaging to boiling sterilization and high-temperature retort processing.
Moreover, its potential extends beyond food packaging to industrial uses, such as vacuum-sealing of mechanical components.
We invite you to consider VE707 as a reliable solution for your barrier film needs.
Featured Product