Roughness/friction tester
Category：Other
Introduction
The Roughness/Friction Tester is designed to quantitatively evaluate the tactile properties of fabrics and soft materials by simulating the hand movements used by craftsmen when assessing surface feel. By mechanizing the “stroking” motion of the human hand, the instrument provides objective numerical data on:
Friction coefficient (MIU) and its variation
Surface roughness (MMD)
This enables accurate assessment of smoothness, softness, and roughness of textiles, soft-touch surfaces, and hair-like materials.
Applications
Textile Industry: Evaluate fabrics, garments, and soft materials for tactile comfort.
Automotive & Interior Materials: Assess feel of upholstery, dashboard coatings, and decorative surfaces.
Material R&D: Correlate frictional and roughness data with perceived hand feel.
Technical Features
Simulates stroking movements of human fingers to replicate tactile evaluation.
Measures friction coefficient and surface roughness with high precision.
Calculates smoothness of contact based on changes in friction.
MIU (Coefficient of Friction) reflects how easily fingers slide over the surface. Higher MIU indicates less smoothness.
MMD (Roughness) reflects how rough the surface feels. Higher MMD indicates rougher texture.
Measures soft-touch conditions and hair surfaces.
Provides both single and simultaneous measurement modes.
Technical Parameters
| Parameter | Specification |
|---|---|
| Device Dimensions | Body: W320×D200×H390 mm; Electronic Amplifier: W180×D400×H400 mm |
| Weight | Body: 10 kg; Amplifier: 12 kg |
| Power Supply | AC 100V, 30W max |
| Operating Environment | Temp: 20–30°C; Humidity: 50–70% RH (no condensation) |
| Friction Force Measurement | Differential transformer (ring dynamometer) for single measurement; Strain gauge for simultaneous measurement |
| Load Range | 200 gf (standard), 1000 gf (low sensitivity) |
| Accuracy | ±0.5% full scale |
| Surface Roughness Measurement | Detector: differential transformer; Displacement: 0.4 mm full scale; Accuracy: ±1.0% |
Key Notes for Use
Maintain stable temperature and humidity during testing (standard: 20°C/65% RH).
Install in locations free from wind and vibration to ensure measurement accuracy.
Suitable for testing soft fabrics, coatings, and hair-like surfaces.
FAQ
1. What does MIU represent?
MIU measures the friction coefficient when fingers slide over a surface. A higher MIU value indicates less smoothness.
2. What is MMD?
MMD measures surface roughness felt by human touch. A higher MMD value indicates a rougher surface.
3. Can it test both fabrics and non-fabric materials?
Yes, it can measure textiles, soft-touch coatings, plastics, and hair-like materials.
4. How accurate are the measurements?
The friction and roughness measurements have an accuracy of ±0.5–1.0%, ensuring reliable tactile evaluation.
5. Can multiple measurements be taken simultaneously?
Yes, the tester supports simultaneous measurement of friction and surface roughness using different detectors.
