1. Product Function and Application
The Greuel Cold Fold Stiffness Tester is designed to evaluate the cold fold stiffness of soft trim materials, including fabrics and leather, by simulating repeated folding at low temperatures.
The tester is used inside a cold chamber, allowing samples and the fixture to be pre-conditioned at the test temperature. After soaking, the ambient temperature drive motor is attached, and samples are folded through knurled rollers. The propensity of materials to resist cracking or stiffness is then visually assessed.
2. Applicable Test Standards
ASTM D1912 – Standard test method for cold fold stiffness of textiles and flexible materials.
3. Technical Specifications
| Feature | Specification |
|---|---|
| Fixture Construction | Aluminum with knurled internal floating rollers |
| Drive Motor | Detachable, ambient temperature gear-motor |
| Weight Application | Appropriate weights included for standardized testing |
| Cold Chamber Compatibility | Yes, test fixture designed for immersion in cold chambers |
| Sample Handling | Folded and passed through rollers manually |
| Evaluation Method | Visual assessment of cold fold stiffness |
| Power Supply | Varies; specified at time of purchase |
| Dimensions / Footprint | Compact design for cold chamber use |
4. Product Advantages and Features
Simple, robust design – Minimal mechanical complexity, easy to operate.
Cold chamber compatible – Allows pre-conditioning of both fixture and samples for accurate cold testing.
Detachable drive motor – Motor stays at ambient temperature, preventing motor performance issues in cold environments.
Knurled floating rollers – Ensure consistent sample folding and reliable stiffness measurement.
Visual evaluation – Enables direct observation of material performance and stiffness.
Low maintenance – Durable aluminum construction and simple mechanism reduce upkeep requirements.
Quick test setup – Fixture and samples can be prepared and tested efficiently.
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