So, what are the layers in Flexible Packaging?
It's quite common for us to be asked by customers what the layers are and what their role is when it comes to Pouches and Flexible Packaging. We have put this information together for you to help answer some of those questions. You know, just in case you have been losing sleep over it and have to know right now.
Typical Pouches and Flexible Packaging film laminate consists of five layers:
Exterior Layer
- Provides a dimensionally stable print surface
- Protects the ink
- Protects the barrier layer
- Plays a roll in burst strength & tear resistance
- Adds to overall pouch strength
Tie Layer
- Provides another layer of protection for the barrier layer
- Bonds the outside layer to the barrier layer
- Hides the color of the barrier layer
Barrier Layer
- Provides chemical resistance
- Prevents moisture, light, and oxygen transmission
Tie Layer
- Bonds the foil to the sealant layer film
- Provides protection to the barrier layer
Sealant Layer (Inside Layer)
- Makes the structure heat sealable
- Contributes to burst strength
- Helps contain the product
- Protects the barrier layer
There are several variables which can affect the exact materials used for your pouches. Chemical compatibility, barrier requirements, appearance, economy, regulatory requirements, expected life cycle, packaging equipment, and distribution method. We can suggest the ideal structure for your application.
We would like to thank the amazing and world famous folks at Glenroy, Inc. for the use of their excellent flexible packaging material layer descriptions, which we have used above.
