Choosing the right stretch film is essential for packaging efficiency, transport safety, and cost optimization. To make an informed decision, it is important to understand how stretch film is measured and which properties affect its performance. In this article, we explore key technical parameters such as thickness, width, length, stretch capacity, tensile strength, roll weight, and film type, and explain how they influence packaging quality and cost-effectiveness.
Key Parameters for Measuring Stretch Film
1. Thickness (Micron / Gauge)
Definition: Thickness is measured in microns (µm) or gauge (American standard). Thicker films are stronger and more tear-resistant but heavier and more expensive, while thinner films are more economical but less suitable for heavy loads.
Conversions:
- 1 micron = 0.001 mm
- 1 gauge ≈ 0.254 micron
Typical thickness ranges and applications:
- 12–15 µm: light, stable pallets
- 17–20 µm: universal applications
- 23–30 µm: heavy or irregular loads
2. Width
Standard widths:
- Hand film: 450 mm / 500 mm
- Machine film: 500 mm
- Mini rolls: 100 mm / 125 mm
The width determines coverage per wrap and the number of layers needed. Wider film covers more surface with fewer rotations.
3. Roll Length
Length varies depending on film type and thickness:
- Hand film: 100–300 m
- Machine film: 300–3000 m
Important: distinguish between gross length (including core) and net length (actual film). Always check net length for accurate comparison.
4. Stretch Capacity (%)
Stretch capacity indicates how far the film can be elongated before breaking, affecting material efficiency.
- 100–150%: hand film
- 200–300%: pre-stretched machine film
- Up to 400%: power stretch for heavy loads
Higher stretch reduces material usage but requires suitable equipment and proper handling.
5. Roll Weight and Core
Net film weight is important when calculating cost per kilogram and total material use. The roll core typically weighs 0.9–1.4 kg for hand rolls.
6. Film Type: Cast vs. Blown
- Cast: quiet unwinding, transparent, low resistance during application, suitable for light to medium loads.
- Blown: stronger, puncture-resistant, matte finish, ideal for sharp edges and heavy loads.
Why Measuring These Parameters Matters
- Optimal choice = lower costs + improved load security
- Incorrect selection may cause film breakage, pallet instability, and material waste
Tips for Choosing the Right Stretch Film
- Analyze your load: weight, shape, sensitivity, packaging type.
- Select the right film type: hand or machine, depending on available equipment.
- Calculate real cost: cost per pallet, not just cost per roll.
- Test in advance: sample packaging can reveal the need for thinner or stronger film.
Useful Links
Check our selection of hand-stretch film and machine stretch film.
Conclusion
Understanding stretch film properties and accurate measurement is the foundation for optimized logistics. Correct selection saves money, enhances load stability, and ensures safer transport. For personalized advice on the ideal film type and thickness, contact our consultants.
Phone: 0800 40 007 (toll-free nationwide)
Email: info@mavaindustrial.com