Everything you need to know about cast vs. blown film, gauge, pre-stretch, machine film, hand film, and how to reduce packaging costs while improving load security.
What Is Stretch Film?
Stretch film, sometimes called pallet wrap or stretch wrap, is a highly stretchable polyethylene plastic film designed to secure products together on a pallet during transportation and storage.
Unlike shrink wrap, stretch film does not require heat. Instead, it relies on elastic recovery to tightly contain a load.
When properly applied, stretch film helps prevent products from shifting during transit, protect loads from dirt and dust, reduce product damage, improve warehouse safety, and lower shipping costs.
Why Stretch Film Matters
A poorly wrapped pallet can cost far more than the film itself. Hidden costs include damaged products, customer complaints, rejected shipments, additional labor, insurance claims, and lost productivity. Using the proper stretch film significantly reduces these issues while lowering film consumption.
How Stretch Film Works
Stretch film works through two important characteristics:
Stretch: Premium machine films can stretch more than 250%, allowing one foot of film to cover more than three feet of pallet.
Elastic Recovery: After stretching, the film attempts to return to its original length, creating holding force and compression that keeps products secure.
Types of Stretch Film
Cast Stretch Film
Advantages:
• Crystal clear appearance
• Quiet unwinding
• Excellent cling
• Lower cost
• Consistent thickness
• Easy barcode scanning
Best for warehouse distribution, retail shipments, high-volume pallet wrapping, and automated equipment.
Blown Stretch Film
Advantages:
• Superior puncture resistance
• Strong tear resistance
Tradeoffs include more noise during application, and reduced clarity.
Cast vs. Blown Stretch Film
Cast film offers the best combination of cost, clarity, and consistency for most applications. Blown film is ideal for sharp or irregular loads where puncture resistance is critical.
Hand Stretch Film vs. Machine Stretch Film
Hand film is ideal for food service applications with experienced wrappers. Machine film provides consistent wrapping, reduces labor costs, and improves load stability by securely wrapping the load to the pallet.
Understanding Stretch Film Gauge
Choosing the correct gauge depends on load weight, product shape, shipping distance, storage conditions, and wrapping equipment.
Typical recommendations:
47-60 gauge: Light loads
70-80 gauge: Standard pallets
90-120+ gauge: Heavy or sharp-edged loads
Understanding Pre-Stretch Film
Pre-stretch film is mechanically stretched during manufacturing. Many facilities reduce film consumption by 20 to 40 percent after switching to pre-stretch products while making wrapping easier for operators.
Common Stretch Film Mistakes
- Using too much film
- Choosing film that is thicker than necessary
- Using an incorrect wrap pattern
- Ignoring load shape and sharp corners
How Stretch Film Can Reduce Packaging Costs
Instead of focusing on the cost per roll, evaluate cost per wrapped pallet. Premium films often reduce labor, material usage, and shipping damage, resulting in lower total packaging costs.
Best Practices
- Anchor the film securely at the base.
- Wrap the bottom multiple times.
- Maintain consistent tension.
- Overlap each layer by about 50%.
- Reinforce the top of the load.
- Inspect every pallet before shipping.
Choosing the Right Stretch Film
Consider load weight, shape, shipping conditions, storage environment, equipment, budget, and performance expectations. The right film protects products while minimizing material and labor costs.
Why JohnPac?
Choosing the right stretch film is more than selecting a roll of plastic. It’s about improving load stability, reducing material waste, increasing operational efficiency, and ensuring your products arrive safely at their destination. At JohnPac, we take the time to understand each customer’s unique packaging needs and recommend stretch film solutions based on load type, application method, shipping conditions, and budget. Whether you’re wrapping a few pallets by hand each day or operating a high-volume automated packaging line, our knowledgeable team can help you identify the right product to maximize performance while minimizing costs. With decades of experience supplying quality packaging materials to businesses across a wide range of industries, JohnPac is committed to providing reliable products, expert guidance, and personalized services that help customers optimize their packaging operations and build a stronger, more efficient supply chain.
Let the packaging experts at JohnPac help you find the right stretch film solution for your operation. Our team can evaluate your current application, identify opportunities to improve load containment, and even determine if you can downgauge your film to reduce material costs without sacrificing performance. Contact us today to see how the right film can improve efficiency and lower your overall packaging costs.