Difference between BOPP and PET foil – which foil is used when?

In the printing and packaging industry, the selection of the appropriate film has a major impact on the quality, durability and visual appearance of the final product. Two of the most commonly used film rolls are BOPP foil и PET foil.

Although they may look similar at first glance, BOPP and PET films have different characteristics and purposes. In this text we explain them. The main differences between BOPP and PET film, as well as when which foil is most appropriate to use.

What is BOPP foil?

BOPP (Biaxially Oriented Polypropylene) film is a polypropylene film oriented in two directions. This process gives it better stability, transparency, and flexibility.

BOPP films are most commonly used for lamination of printed materials and for packaging where visual effect is important.

Characteristics of BOPP foil:

• high transparency
• light weight
• good flexibility
• moisture resistance
• suitable for hot lamination

Most common application:

• catalogs and brochures
• book and magazine covers
• marketing materials
• decorative packaging

What is PET foil?

PET (Polyethylene Terephthalate) film is a polyester film known for its high mechanical strength and thermal stability. It is stronger and more resistant compared to BOPP foil.

PET films are most often used where it is needed greater durability and stability.

Characteristics of PET foil:

• high mechanical strength
• better heat resistance
• greater stability
• longer lifespan
• less flexibility than BOPP

Most common application:

• industrial packaging
• technical and commercial products
• packaging with higher durability requirements

Main differences between BOPP and PET film

1. Material and structure

BOPP film is made from polypropylene and is lighter and more flexible.
PET film is polyester and is stronger and more stable.

2. Flexibility

BOPP foil is more flexible and easier to process when laminating.
PET foil is stronger and harder to bend.

3. Heat resistance

PET foil has better thermal stability.
BOPP foil is suitable for standard lamination temperatures.

4. Visual effect

BOPP foil offers multiple visual variants (gloss, matte, soft touch, pearlescent, holographic).
PET foil has a cleaner and industrial look.

5. Intended use

BOPP foil → visual and printed materials
PET foil → durable and technical applications

When to choose BOPP foil?

BOPP foil is a suitable choice when:

• you want a better visual effect
• work with printed materials
• flexibility is needed
• the product is not exposed to extreme conditions

When to choose PET foil?

PET foil is a better choice when:

• greater mechanical strength is required
• the product is exposed to higher temperatures
• a longer lifespan is required
• it is about industrial packaging

Conclusion

Both BOPP and PET films have their own clear applications.
BOPP foil is ideal for lamination and visual applications, while PET foil is intended for heavier and more durable applications.

By choosing the right foil for the intended purpose, better quality and longer-lasting results are ensured.