The Coefficient of Friction Tester (COF Tester) accurately determines the static (μs) and kinetic (μk) friction values of materials such as films, paper, and laminates. These measurements are essential for understanding slip properties, blocking behavior, machinability, and printability.
With a motorized sliding sled, high-precision load cell, and digital data acquisition system, the tester ensures stable, repeatable, and standard-compliant results.
⭐ Key Features
- Measures both static & kinetic COF
- High-precision load cell for accuracy
- Constant-speed motorized sliding platform
- Quick-change sled system
- Digital display or touchscreen interface
- Real-time force curve graph (advanced models)
- USB/RS232 data output or optional printer
- Wide test speed range
- Complies with ISO, ASTM, TAPPI standards
- Durable steel structure with anti-vibration base
🧪 Applications
- Plastic films & sheets
- Laminated packaging
- Flexible packaging materials
- Paper & paperboard
- Adhesive coatings
- Label materials
- Printed surfaces
- Foils & metallic films
📦 Materials Tested
- PE, PP, PET, PVC films
- Coated paper and board
- Aluminum foil
- Composite laminates
- Packaging pouches
- Printing materials
📏 Test Standards
- ASTM D1894 – Static & Kinetic COF of Plastics
- ISO 8295 – Film & Sheet COF
- TAPPI T816 – COF of Paperboard
- GB/T 10006 – Plastic Film COF
⚙️ Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range | 0 – 5N |
| Load Cell Accuracy | ±1% |
| Test Speed | 100 mm/min, 150 mm/min (adjustable) |
| Sled Weight | 200 g ± 2 g (standard) |
| Display | Digital LCD or touchscreen |
| Test Modes | Static COF, Kinetic COF |
| Stroke Length | 100–150 mm |
| Data Output | USB / RS232 / Printer (optional) |
| Power Supply | AC 220V / 50–60Hz |
🎁 What’s Included
- COF tester main unit
- Standard sled (200 g)
- Test weight set (if applicable)
- Sample cutter (optional)
- Power cable
- User manual
🔧 Options & Accessories
- Additional sled weights (500 g, custom sizes)
- Advanced software with force-time graph
- Thermal printer
- Precision sample cutter
- Calibration weights
- Anti-slip base mats
📄 Sample Requirements
- Flat sheets or film cut to required size
- Clean, wrinkle-free, and free of contamination
- Film thickness typically 20–200 microns
- Conditioned samples as per ISO/ASTM standards
❓ FAQs
1. What is the difference between static and kinetic COF?
• Static COF: Force required to start movement
• Kinetic COF: Force required to maintain movement
2. Why is COF important?
It determines slip properties, machinability, packing line performance, and product handling behavior.
3. Can the COF tester test printed surfaces?
Yes—printing ink and coatings often affect friction.
4. What industries rely on COF testing?
Flexible packaging, plastics, food packaging, labels, printing, and film manufacturing.
