Stretch wrap is a highly stretchable plastic film, typically made from Linear Low-Density Polyethylene (LLDPE), designed to tightly bind items together using elastic recovery. It is commonly used to secure products on pallets, preventing product loss, discouraging tampering, and reducing worker injuries. Stretch film is available in various widths, thicknesses, and types to suit different applications. For more details on its uses, visit our blog.
Usually, a stretch film holds boxes and products together on a pallet for transportation. It is also used to hold other objects together and protect objects during transport and storage. Stretch film can come in a variety of specialty films. Some examples are UV stretch film, vented pallet wrap, anti-static stretch film, colored stretch film, etc.
Stretch film is manufactured using different extrusion processes, which are also used for other flexible plastic products. Below are the two most common processes for producing stretch film:
Cast stretch wrap is produced using the cast extrusion process. This method involves melting thermoplastic material, extruding it through a flat die, and cooling it on a chill roll to solidify. Cast stretch film offers:
- Excellent clarity for visibility of wrapped products.
- Ease of stretch with less force required.
- Increased tear resistance and a quiet unwind from rolls.
- Superior cling for secure packaging.
Available in both machine-grade and hand-grade options, cast stretch film is a popular and cost-effective choice.
Advantages of Cast Stretch Film:
- Lower manufacturing costs make it more affordable than blown stretch film.
- High clarity allows easy product identification.
- Quiet unwinding minimizes noise during application.
- Two-sided cling ensures secure wrapping.
Disadvantages of Cast Stretch Film:
- Lower load-holding power compared to blown stretch film.
- Reduced memory and tear resistance.
Blown stretch wrap is made using the blown extrusion process, where molten plastic is extruded through an annular slit die to form a tube. Air is then introduced to inflate the tube, followed by cooling via an air ring. This method results in a stretch film that is stronger and more durable than cast film, with superior load-holding capacity.
Advantages of Blown Stretch Wrap:
- Higher load and stretch capacity for securing heavier loads.
- Premium quality with excellent memory, maintaining load security after stretching.
- Superior tear resistance, making it ideal for loads with sharp edges.
Disadvantages of Blown Stretch Wrap:
- Higher manufacturing costs make it more expensive.
- Reduced clarity due to crystallization during production.
- Noisier unwinding compared to cast stretch wrap.
Stretch wrap is a versatile, reliable, and durable solution for the safe transportation and storage of goods. Its benefits include:
Stretch wrap undergoes rigorous testing under the D549 Standard Test Method, ensuring its elastic recovery under stress. This durability protects goods even under significant pressure. When used on pallets, stretch wrap tightly secures products, preventing movement, reducing vibrations, and minimizing impact-related damage during transportation.
Stretch wrap creates a moisture-proof barrier, essential for safeguarding items in storage. It keeps goods dry and clean by blocking dust, dirt, and moisture, ensuring that items remain in pristine condition throughout transit unless the film is compromised.
Stretch wrap aids efficient stock management by bundling similar items together for easier organization. Clear stretch wrap allows RFID scanners to read barcodes without unwrapping pallets, simplifying inventory checks. Alternatively, printed stretch wrap offers visual cues for quick identification during stock assessments.
Stretch wrap minimizes material waste compared to rigid packaging like boxes or containers. Its tight wrapping reduces packaging costs and transportation expenses by optimizing space usage.
Stretch films can be used for everything from irregularly shaped objects to uniform pallet loads. You can secure fragile items during transportation or safeguard perishables in the food industry. Stretch films are also available in various gauges and types, including machine and hand wrap. They are also available in a selection of colours to suit your preference and you can even personalise the wrap with your company's logo.
Stretch wrap is 100% recyclable and typically free of contamination since it is not primary packaging. Companies can choose to recycle or dispose of it responsibly, contributing to eco-friendly practices.
Stretch wrap makes tampering noticeably evident, as it cannot be easily resealed like boxes. Black stretch wrap adds an extra layer of security by concealing the contents, deterring theft or unauthorized access.
Proper storage ensures that stretch wrap maintains its quality and usability for future needs. Here's how to store it effectively:
- Keep the area dry, cool, clean, and preferably indoors to protect the film from environmental factors.
Storage Tips
1. Use Original Packaging: Keep the stretch wrap in its original packaging or a sealed plastic container to shield it from contaminants.
2. Store Vertically: Position rolls vertically to prevent warping or bending. Use racks or shelves for organized storage and easy access.
3. Label Clearly: Label storage containers or designated areas, especially if you have multiple types of stretch film, for quick identification.
With proper handling and storage, stretch wrap will remain in excellent condition, ready for efficient and reliable use whenever needed.
For further details on the extrusion processes and their applications, visit our website.
