Overview
EN ISO 10765:2010 / ISO 10765:2010 defines a tensile test method to characterize elastic materials used in footwear. The standard produces a strength/elongation (load vs. extension) graph from a tensile strength test and specifies how to extract typical parameters - modulus, elastic gradient, limit of useful extension, maximum extension resistance and extension at break - for any elastic tape, cord or fabric containing rubber used in shoe uppers, straps or similar components.
Key topics and requirements
- Scope: Applicable to any elastic material for footwear; adopted by CEN as EN ISO 10765:2010.
- Reference standard: ISO 18454 for conditioning (standard atmospheres).
- Sample preparation:
- Standard tested length typically 100 mm (reduced to 50 mm if material is limited).
- Test pieces are sewn between coated fabric rectangles to form grips; three specimens are tested.
- Conditioning: at least 24 h at (23 ± 2) °C and (50 ± 5) % RH.
- Apparatus:
- Tensile testing machine with autographic recording, crosshead speeds of (100 ± 20) mm/min (or (50 ± 10) mm/min for shorter samples).
- Steel ruler, sewing machine, coated PU fabric for grips.
- Measured parameters (from strength/elongation graph):
- 20% and 50% modulus - load at 20%/50% extension divided by sample width (N/cm).
- Elastic gradient (EG) - slope of the straight part of the curve normalized to width.
- Limit of useful extension (LUE) - point where slope becomes five times the initial average; expressed as % elongation.
- Maximum extension resistance and extension at break - percentage elongations at peak load and at rupture.
- Reporting: Test report must reference ISO 10765:2010 and include material description, averaged results for all parameters and any deviations from the method.
Applications and users
This standard is essential for:
- Footwear manufacturers and design engineers validating elastic components for fit, comfort and durability.
- Material and component suppliers verifying product specifications and consistency.
- Independent test laboratories performing quality control, incoming inspection or compliance testing.
- R&D teams comparing material formulations or construction methods during product development.
Practical uses include supplier acceptance tests, product performance comparisons, failure analysis of straps/uppers, and documenting material characteristics for technical specifications.
Related standards
Keywords: ISO 10765, EN ISO 10765:2010, footwear elastic materials, tensile performance, strength/elongation, modulus, elastic gradient, limit of useful extension, tensile testing.