Polyolefin (POF) shrink film is widely used for packaging food, bakery products, consumer goods, printed materials and many other products that require clear and reliable protection.
Although different POF shrink films may look similar, their performance can vary depending on the film structure and manufacturing process. Different types of POF film are developed to meet different packaging requirements.
This guide introduces the main types of Polyolefin (POF) shrink film and explains their key differences and typical applications.
What Is Centerfold Polyolefin (POF) Shrink Film?
Centerfold POF shrink film is supplied on a roll folded in half along its length. The product is placed inside the folded film before the open sides are sealed.
Centerfold POF film is commonly used with L-bar sealers and various automatic or semi-automatic shrink packaging machines. After sealing, the package passes through a shrink tunnel, where heat causes the film to shrink tightly around the product.
POF shrink film is widely used because it offers good clarity, reliable sealing, high shrinkability and good overall packaging performance.
Standard Polyolefin (POF) Shrink Film
Standard POF shrink film is the most commonly used type of Polyolefin shrink film for general packaging applications.
It provides a good balance between clarity, shrink performance, sealing strength and cost. It can be used for a wide range of products, including food, bakery products, household goods, stationery, printed materials and consumer products.
Typical thicknesses include 10, 12, 15, 17, 19, 25, 30 and 35 μm, depending on the application.
Main advantages:
Good overall packaging performance
Good clarity
Reliable sealing
Good shrinkability
Suitable for food packaging
Wide range of available thicknesses
Suitable for different types of shrink packaging machines
Standard POF is a practical choice for general packaging where a good balance between performance and cost is required.
Low Temperature Polyolefin (POF) Shrink Film
Low Temperature POF shrink film is designed for applications where products or packaging materials are sensitive to heat.
Compared with conventional POF shrink film, low-temperature POF can achieve effective shrinking at lower operating temperatures. This helps reduce heat exposure to the packaged product and can be particularly useful for heat-sensitive food and consumer products.
Typical applications include chocolates, confectionery, bakery products, ice cream and other products where excessive heat exposure should be minimized.
Low Temperature POF can also provide good clarity and a clean finished appearance while helping reduce the thermal load on the packaging process.
Main advantages:
Lower shrink temperature
Reduced heat exposure to products
Good clarity
Suitable for heat-sensitive products
Clean and attractive package appearance
Suitable for manual, semi-automatic and automatic packaging equipment
When packaging products that may be affected by higher temperatures, Low Temperature POF can be a suitable alternative to standard shrink film.
Cross Linked Polyolefin (POF) Shrink Film
Cross Linked POF shrink film is produced using an electron-beam irradiation cross-linking process. The cross-linking process modifies the polymer structure and gives the film higher strength and improved resistance to puncture and tearing.
Compared with standard POF, Cross Linked POF provides stronger sealing performance, higher puncture resistance and better resistance to mechanical stress.
It can also achieve a higher shrink rate, helping create a tighter package with fewer wrinkles and a cleaner appearance.
Typical thicknesses include 10, 12, 13.5, 15, 17, 19, 25 and 30 μm.
Main advantages:
Higher puncture resistance
Higher mechanical strength
Stronger sealing performance
High shrinkability
Excellent clarity
Better resistance to excessive heat during shrinking
Improved package appearance
Cross Linked POF is suitable for applications where higher film strength, better puncture resistance and a more premium finished appearance are required.
Anti-Fog Polyolefin (POF) Shrink Film
Anti-Fog POF shrink film is designed for products where condensation can affect package visibility.
When packaged products are exposed to temperature changes, moisture can form on the inside surface of the film. Conventional shrink film may become cloudy under these conditions. Anti-Fog POF helps reduce this fogging effect and maintain better product visibility.
Typical applications include refrigerated and fresh food packaging such as pizza, vegetables, chili, tomatoes, broccoli and cucumbers.
Typical thicknesses include 12 and 15 μm.
Main advantages:
Reduced fogging caused by condensation
Improved product visibility
Better package presentation
Suitable for refrigerated and fresh food
Helps maintain a clearer package appearance
For products that are stored or displayed under refrigerated conditions, Anti-Fog POF can provide a significant advantage over conventional shrink film.
Comparing Different Polyolefin (POF) Shrink Films
| POF Film Type | Main Feature | Typical Applications |
|---|---|---|
| Standard POF | Balanced performance and cost | General packaging, food, consumer products |
| Low Temperature POF | Effective shrinking at lower temperatures | Heat-sensitive food and consumer products |
| Cross Linked POF | Higher strength and puncture resistance | Demanding packaging applications |
| Anti-Fog POF | Better visibility under condensation | Refrigerated and fresh food |
The right POF shrink film depends on the product, packaging requirements, machine conditions and desired package appearance.
How to Choose the Right POF Shrink Film
When selecting Polyolefin (POF) shrink film, consider the following factors:
1. Product type
Different products may require different film characteristics. General consumer products may use Standard POF, while heat-sensitive or refrigerated products may benefit from specialized POF films.
2. Heat sensitivity
If the product is sensitive to heat, Low Temperature POF can help reduce heat exposure during the shrinking process.
3. Required film strength
For products with sharp edges or applications requiring higher mechanical strength, Cross Linked POF provides improved puncture and sealing performance.
4. Condensation
For refrigerated or fresh products, Anti-Fog POF can help maintain better package visibility.
5. Film thickness
Film thickness should be selected according to product size, weight, packaging method and required strength. POF shrink film is available in a wide range of thicknesses to meet different packaging needs.
6. Packaging equipment
POF shrink film can be used with a wide range of shrink packaging equipment. Sealing and shrink tunnel conditions should be adjusted according to the specific film type and actual machine conditions.
Why Choose Polyolefin (POF) Shrink Film?
Polyolefin (POF) shrink film provides a combination of clarity, shrinkability, sealing performance and product protection.
Compared with traditional PVC shrink film, POF is chlorine-free and is widely used for food and consumer product packaging.
Depending on the application, different POF structures can provide additional benefits such as lower-temperature shrinking, higher mechanical strength or anti-fog performance.
This makes Polyolefin (POF) shrink film a versatile packaging material for a wide range of products.
Conclusion
Polyolefin (POF) shrink film is available in different structures and performance grades to meet different packaging requirements.
Standard POF is suitable for general packaging applications, while Low Temperature POF is designed for products that require lower heat exposure. Cross Linked POF provides higher strength and puncture resistance, while Anti-Fog POF is designed for refrigerated and fresh food packaging where condensation can affect visibility.
Choosing the right type of POF shrink film can improve package appearance, product protection and overall packaging performance.
