Ultimate Guide to Stretch Wrap & Film: Your Complete Resource for Canadian Warehouses
Ultimate Guide to Stretch Wrap & Film: Your Complete Resource for Canadian Warehouses
Stretch wrap, also known as stretch film, is an essential product for packaging and shipping industries in Canada. Made from Linear Low-Density Polyethylene (LLDPE), this highly stretchable plastic film is designed to secure items, offering both load stability and protection. Whether used in industrial settings or for transportation purposes, stretch film plays a critical role in keeping products safe and secure. This guide provides a comprehensive overview of stretch wrap types, applications, and benefits.
What is Stretch Wrap?
Stretch wrap is a flexible plastic film wrapped around items or pallets, leveraging its elasticity to hold products tightly together. This added security minimizes product loss, deters tampering, and reduces the risk of worker injury. Available in various widths, thicknesses, and forms, stretch wrap is versatile enough to meet a wide range of packaging needs.
Common Types of Stretch Film
Two primary manufacturing processes—cast and blown extrusion—create different types of stretch film with distinct properties and uses.
1. Cast Stretch Wrap
Cast Stretch Wrap is produced using a cast extrusion process, where thermoplastic material is melted and extruded through a flat die, then solidified on a chill roll. This process gives cast stretch wrap exceptional clarity and superior cling. Cast stretch film is available in both machine-grade and hand-grade varieties.
Advantages:
- More affordable than blown stretch film
- Transparent, making products visible
- Unwinds quietly
- Two-sided cling ensures secure wrapping
Disadvantages:
- Lower load-holding capacity than blown film
- Less memory, meaning it may stretch out more over time
- Reduced tear resistance compared to blown stretch film
2. Blown Stretch Wrap
Blown Stretch Wrap is created using the blown extrusion process, where plastic melt is forced through a die, forming a tube that’s inflated with air. This technique makes blown film stronger and more puncture-resistant, offering enhanced load stability.
Advantages:
- Greater load-holding strength and stretch capacity
- Stronger memory, helping loads stay secured
- Higher tear resistance, ideal for loads with sharp edges
Disadvantages:
- Higher cost due to manufacturing complexity
- Reduced clarity, making it harder to see wrapped items
- Noisy when unwound
Specialty Stretch Films for Unique Applications
In addition to cast and blown films, specialty films are available to meet specific needs:
- Hybrid Stretch Film: A lightweight, multi-layered film that uses less material while maintaining strength.
- Micron Stretch Film: Thicker than hybrid film, with excellent stretch and cling, ideal for load security.
- Opaque Stretch Film: Blocks UV rays, deters theft by hiding products, and is ideal for outdoor storage.
Choosing the Right Stretch Film for Your Application
Choosing the correct film thickness and width depends on the load weight and shape. Here’s a quick guide:
| Gauge | Hand Wrap (12"-20") | Machine Wrap (20") |
|---|---|---|
| 37 Gauge | Light loads < 800 lbs | Excellent for light loads |
| 47 Gauge | Boxes up to 1800 lbs | Great for lighter boxes |
| 63 Gauge | Loads up to 2200 lbs | Popular for standard pallets |
| 80 Gauge | Common, versatile | Suitable for heavy applications |
Frequently Asked Questions (FAQs) about Stretch Wrap
1. When should I use stretch wrap?
Stretch wrap is essential for holding items together on a pallet for transport and storage. Specialty films, like UV or anti-static, are also available for specific needs.
2. How do I choose the right size of stretch film?
Consider load weight, size, and shipping conditions. Refer to the thickness guide above or contact a packaging expert for recommendations.
3. What is the difference between cast and blown stretch film?
Cast film is clear and quiet, while blown film offers higher strength and tear resistance. Cast film is suitable for lighter loads, whereas blown film handles heavier, more irregularly shaped items.
4. Can stretch film be recycled?
Yes, stretch film is recyclable. Verify with local recycling centers that they accept soft plastics.
5. Do I need a stretch wrap machine?
For businesses wrapping more than 15 loads per day, a stretch wrap machine can enhance efficiency and reduce film waste.
6. What is pre-stretch film?
Pre-stretch film is a standard film that has been stretched to its maximum elasticity, making it easier to apply with minimal additional stretching.
7. Is UV stretch film necessary for outdoor storage?
If products are stored outside for extended periods, a UV-protected stretch film can protect against sun damage and prolong the life of the film and contents.
8. What’s the difference between stretch wrap and shrink wrap?
Stretch wrap is applied by stretching around a load, while shrink wrap requires heat to conform to a product's shape. Stretch wrap is ideal for pallets, whereas shrink wrap is often used for retail packaging.
