Differences Between PVC, Polyolefin & Polyethylene Shrink ...

31 July

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Polyvinyl chloride (PVC), polyolefin (POF), and polyethylene (PE) shrink films are robust and dependable materials utilized for both product packaging and to secure palletized goods during shipping. These films are favored for their affordability, user-friendliness, and their ability to offer exceptional protection during transit and while displayed on retail shelves.

Each material is characterized by distinct qualities, making the choice of the appropriate shrink film crucial to ensure that products reach their destination in optimal condition. But how can you determine which type is best suited for your applications?

This article delves into the pros and cons of polyolefin, PVC, and polyethylene shrink films, providing insights to help you select the most suitable option for your requirements. (For newcomers in the sector who wish to educate themselves about shrink films, refer to our Complete Guide to Shrink Wrap article.)

Polythene Shrink Film

Polythene shrink film is made from a plastic that shrinks upon heating, allowing it to closely wrap around the products being packaged. It is commonly used for the distribution of beverage bottles, soaps, and cans thanks to its strength and versatility. Polythene shrink film (PE) can be found in various forms, including Low-Density Polyethylene (LDPE), Linear Low-Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE), and High-Density Polyethylene (HDPE).

The differences among these types mainly lie in their molecular structures and the unique properties they boast:

LDPE is the most widely used form, known for its flexibility, transparency, and durability. It is typically utilized in plastic bags, frozen food packaging, and consumer-use items. Its density ranges from 0.917g/cm3 to 0.93g/cm3 and has a thickness between 0.4 mil to 40 mil.

LLDPE, characterized by its linear structure, displays enhanced malleability and protects against tearing and punctures. It serves diverse applications, such as heavy-duty bags and cable covers, and typically has a density of 0.965g/cm3 or more, with a thickness from 0.4 mil to 40 mil.

MDPE is less commonly found and is often used in pond liners, either alone or blended with LLDPE or LDPE to strike a balance between strength and flexibility.

HDPE stands out for being lightweight yet exceptionally robust and resilient. Like LDPE and LLDPE, it boasts strong impact resistance, making it suitable for various applications from construction materials to consumer products like shampoo bottles. It typically has a density ranging from 0.93g/cm3 to 0.97g/cm3 and a thickness that spans between 12 mil to 100 mil.

Polythene Shrink Film Pros and Cons

Identifying the right wrapping material for your products necessitates understanding the advantages and disadvantages of PE.

PE Benefits:

• Protection: Provides robust protection against damage, dirt, and moisture.
• Flexibility: Conforms effectively to various product shapes.
• Transparency: Allows visibility for consumers to inspect products.
• Affordability: Commonly used and cost-effective compared to other wrapping materials.

PE Drawbacks:

• Heat Sensitivity: Not suitable for heat-sensitive items as it may cause damage.
• Environmental Concerns: Limited recycling options can lead to environmental waste.

Another variant of polyethylene shrink film is Polyethylene Terephthalate (PET), a versatile thermoplastic polymer suitable for producing bottles, containers, and various consumer items that require sterilization. While being more expensive, PET is known for its high performance and ability to withstand UV exposure.

Polyolefin Shrink Film

Constructed from thermoplastic polyolefins, polyolefin shrink film (POF) serves as an economical and multipurpose wrap commonly utilized for food-related products. Its glossy finish enhances product visibility while preserving moisture, making it an attractive option for supermarkets.

POF Benefits:

• Strength: Highly resistant to tears and punctures.
• Versatility: Adaptable to various product shapes and sizes.
• Aesthetic Appeal: Glossy finish enhances product presentation.

POF Drawbacks:

• Cost: Stronger properties make it more expensive than alternative films.
• Temperature Limitations: Has a lower shrinkage value, which may lead to issues with certain products.

PVC Shrink Film

Polyvinyl Chloride (PVC) is a thinner plastic film that is especially popular for wrapping items like DVDs and CDs. Upon heating, the film tightly adheres to the product, offering tamper-evident packaging.

PVC Benefits:

• Multi-purpose: Suitable for various products of different shapes and sizes.
• Presentation: Offers clear and attractive packaging.
• Usability: The thinner design facilitates easy consumer access to the product.

PVC Drawbacks:

• Temperature Sensitivity: Can become brittle if exposed to unsuitable temperatures.
• Single Product Use: Not designed for bundling multiple items.

Conclusion: Choosing the Right Shrink Film

When it comes to selecting between PE, POF, and PVC shrink films, each has attributes that cater to specific packaging needs. By understanding their distinct properties, businesses can choose the right film for their products, ensuring effective packaging solutions.

Whether you need PVC, Polyolefin, or Polyethylene shrink film, contact us today for a free quote.