Flexible packaging polymers
Flexible packaging is widely used throughout the food industry because it helps protect products while reducing packaging weight and material use. Selecting the right packaging material can improve product quality, extend shelf-life, and support transportation storage and sustainability goals.
This resource introduces common flexible packaging polymers and explains how each material contributes to food packaging performance.
What is flexible packaging?
Flexible packaging refers to packaging materials that are lightweight, flexible, and designed to protect food products. Common examples include pouches, sachets, wraps, and vacuum bags.
Many flexible packaging materials are made from multiple layers, with each layer serving a specific purpose, such as providing strength, moisture protection, oxygen barriers, or heat-sealing properties. Selecting the right combination of materials helps preserve product quality throughout its shelf life.
Common flexible packaging polymers
Different polymers provide different performance characteristics depending on the needs of the food product. Understanding the role of each material can help businesses select packaging that supports product protection, performance, and shelf-life.
Polyethylene
Polyethylene is commonly used as the inner sealing layer in flexible packaging. It provides excellent moisture resistance, flexibility, and reliable heat sealing, making it well suited for pouches, liners, and other food packaging applications.
Polypropylene
Polypropylene offers excellent heat resistance, stiffness, and clarity. It is frequently used for snack packaging, overwraps, and applications requiring greater structural strength.
Polyethylene terephthalate
Polyethylene terephthalate provides strength, dimensional stability and an excellent surface for high-quality printing. It is commonly used as the outer layer of stand-up pouches and flow-wrap packaging.
Ethylene vinyl alcohol
Ethylene vinyl alcohol is a high-performance barrier material that helps protect food products from oxygen exposure. It is often incorporated into multilayer packaging to help extend product shelf-life.
Nylon
Nylon provides excellent puncture resistance and durability, making it a common choice for vacuum packaging, retort pouches and products requiring added strength during transportation and handling.
Metallized polyethylene terephthalate and oriented polypropylene
Metallized polyethylene terephthalate and oriented polypropylene provide excellent protection against light and gases. These materials are commonly used for products such as coffee, confectionery, and snack foods where maintaining freshness is important.
Ethylene vinyl alcohol
Ethylene vinyl alcohol is a high-performance barrier material that helps protect food products from oxygen exposure. It is often incorporated into multilayer packaging to help extend product shelf-life.
Why are multilayer packaging materials used?
Many flexible food packages combine several polymers into a single structure. Each layer performs a different function, allowing manufacturers to optimize product protection while using materials efficiently.
Benefits of flexible packaging
Flexible packaging offers several advantages for food manufacturers, including:
- Excellent protection against oxygen and moisture
- Customizable multilayer packaging structures
- Reduced material use compared with many rigid packaging formats
- Lower transportation costs due to lightweight construction
- Improved storage and shelf-space efficiency
- Growing availability of sustainable and compostable packaging options
Frequently asked questions
Different polymers provide different performance characteristics. Combining multiple materials into a single package allows manufacturers to balance strength, barrier performance, sealing properties, and sustainability based on the needs of the product.
There is no single packaging material that works for every application. The best choice depends on the product, shelf-life requirements, storage conditions, transportation needs, and sustainability goals.
Yes. High-barrier materials can help protect products from oxygen, moisture and light, reducing product degradation, and helping maintain quality throughout storage and distribution.
CFRIL packaging services
CFRIL offers a range of packaging services to help food and beverage businesses select, evaluate and optimize packaging for their products. Services include:
- Packaging material selection
- Flexible packaging recommendations
- Shelf-life studies
- Packaging performance testing
- Package prototyping
- Compression testing
- Vibration testing
- Drop testing
- Leak testing
Continue exploring
Interested in learning more? Explore additional resources from CFRIL:
Need help selecting food packaging?
Choosing the right packaging can have a significant impact on product quality, shelf-life, and consumer experience. CFRIL works with food and beverage businesses to evaluate packaging materials, assess package performance, and support product commercialization.
Contact CFRIL to learn how we can help identify the right packaging solution for your product.