Overview - ISO 22777:2004 (Footwear - Touch and close fasteners)
ISO 22777:2004 specifies a laboratory test method to determine the peel strength of touch-and-close fasteners (hook-and-loop) used in footwear accessories. The standard covers measurement of peel force per unit width both before and after repeated opening and closing cycles, providing a repeatable way to assess durability and bond performance of fastening tapes.
Key topics and technical requirements
- Test principle: Measure the average peel force (N) required to separate hook and loop tapes along their length, then express results as peel strength (N/mm) by dividing force by effective width.
- Specimen preparation:
- Cut and mark specified lengths from hook and loop tapes to produce multiple 100 mm specimens (detailed marking for “1” and “2” ends to create Type A and Type B assemblies).
- Produce twelve test results (three repeats per configuration) to compute mean values.
- Conditioning: Specimens and testing must be performed after conditioning in the standard atmosphere defined by EN 12222 for at least 24 h.
- Apparatus and settings:
- Tensile testing machine verified per EN ISO 7500‑1 (class 2 accuracy). Jaw separation rate: 100 mm/min ± 10 mm/min.
- Roller device to consolidate assemblies: 100 mm ± 5 mm diameter roller, applying 1.0 N ± 0.1 N per mm of specimen width.
- Cycling machine for repeated opening/closing: two drums (160 mm and 162.5 mm diameters), rotate smaller drum at 60 rev/min ± 5 for 5 000 revolutions, reversing direction every ~30 s. Inter-drum force: 1 N per mm of effective width.
- Calculation and reporting:
- Average peel force from force-vs-extension traces, converted to N/mm.
- Test report shall reference ISO 22777, identify fastener tapes (codes, colours, nature), give minimum mean peel strength, note deviations/incidents and date.
Applications - who uses ISO 22777:2004
- Footwear manufacturers and component suppliers validating accessory durability and quality.
- Materials and test laboratories performing compliance and R&D testing on hook-and-loop closures.
- Quality managers and product engineers comparing fastener constructions, selecting tapes for consumer, work, or protective footwear.
- Procurement and regulatory teams specifying performance criteria in supplier contracts and technical files.
Related standards
- EN 12222 - Standard atmospheres for conditioning and testing of footwear and components
- EN 12240 - Determination of overall and effective widths of touch-and-close tapes
- EN ISO 7500‑1 (ISO 7500‑1:2004) - Verification/calibration of tensile testing machines
Keywords: ISO 22777:2004, peel strength, touch and close fasteners, footwear testing, hook-and-loop, test methods, repeated opening and closing, tensile testing machine, conditioning.
Open preview (PDF)Footwear — Test methods for accessories: Touch and close fasteners — Peel strength before and after repeated closing
