Leather Unsealing Fatigue Tester

Applicable Standards

The tester complies with global standards for leather and textile durability testing, including:

• ISO 5402 (Leather – Physical and mechanical tests – Flex tester method)
• SATRA TM55 (Standard method for seam fatigue testing in footwear)
• ASTM D6193 (Standard practice for loops in leather)
• GB/T 3903.32 (China’s national standard for footwear seam fatigue)
• EN 13520 (Flexometer testing for coated fabrics)

These standards ensure consistent evaluation of seam strength, adhesion, and fatigue resistance.

Main Parameters

Working Principle

The machine operates by cyclic mechanical flexing:

1. Sample Clamping: Leather specimens with seams or bonded joints are secured in the test stations.
2. Fatigue Simulation: A motorized arm repeatedly bends, folds, or stretches the sample at a preset angle and frequency (e.g., 200 cycles/min at 45°).
3. Cycle Execution: The test runs until seam failure (e.g., stitch breakage, coating delamination) or a predefined cycle count (e.g., 50,000 cycles).
4. Failure Analysis: Post-test, samples are inspected for crack propagation, stitch integrity, or adhesion loss.

Test Principle & Applications

• Seam Fatigue Testing (SATRA TM55/ISO 5402):
  • Seams are subjected to 10,000–50,000 cycles to simulate years of wear.
  • Pass/fail criteria: No stitch breakage or seam separation (e.g., <1 mm gap for automotive upholstery).
• Key Industries:
  • Footwear: Validating shoe upper seams and stitching durability.
  • Automotive: Testing seat cover stitching and dashboard panel bonding.
  • Fashion: Assessing bag handles and accessory strap integrity.

The Leather Unsealing Fatigue Testing Machine is indispensable for manufacturers seeking to optimize product lifespan, reduce warranty claims, and meet stringent quality benchmarks. Its precision and adherence to global standards make it a cornerstone of leather goods testing laboratories.