Overview
ISO 22652:2002 - Footwear - Test methods for insoles, lining and insocks - Perspiration resistance specifies a laboratory method to determine the ageing effects of human sweat (perspiration resistance) on insoles, linings and insocks. Developed from EN 12801:2000, the standard defines specimen preparation, an artificial sweat formulation, temperature cycles, measurement points and result expression to quantify dimensional change (shrinkage) and optional mechanical property changes after exposure.
Key topics and requirements
- Scope: Determines ageing due to sweat on footwear components (insoles, lining, insocks).
- Specimens: Minimum two specimens, nominal size (60 mm ± 20 mm) square; sampled per prEN 13400 if cut from components. Condition specimens per EN 12222 for at least 24 h before testing.
- Artificial sweat solution (per litre):
- l-histidine monohydrochloride monohydrate: 5.00 g
- Sodium chloride (NaCl): 5.00 g
- Disodium hydrogen orthophosphate (dehydrated): 2.50 g
- Adjust to pH 8 using 0.1 M sodium hydroxide.
- Apparatus: Oven(s) capable of 35 °C ±1 °C and 40 °C ±1 °C; vernier caliper with 0.1 mm accuracy; flat-bottom containers; small weight to raise liquid level across specimen.
- Test cycle:
- Mark parallel lines 5 mm from each edge and measure four distances (A–B, C–D, E–F, G–H).
- Immerse specimen so solution reaches top edge; hold at 35 °C for 24 h.
- Rinse with distilled water, dry at 40 °C for 24 h.
- Condition 24 h in standard atmosphere.
- Repeat immersion/dry/condition steps five times.
- Results: Measure distances after cycles and calculate linear shrinkage (%) in length and width using the specified formulas; express to 0.5% accuracy. Optional tensile/tear resistance may be measured before and after exposure (expressed in Pa or N/m²).
- Test report must include results, detailed sample ID, sampling method, method reference, deviations and test date.
Applications and users
- Practical for footwear manufacturers, material suppliers, quality control laboratories and test houses assessing insole/lining durability against perspiration.
- Helps in material selection, product development, specification compliance and failure analysis for comfort and hygiene-critical footwear (sports, safety, medical).
- Useful for comparing treatments, coatings or alternative materials for improved perspiration resistance and dimensional stability.
Related standards
- EN 12801:2000 (original European text adopted into ISO 22652)
- EN 12222 / ISO 18454:2001 - conditioning and normal atmospheres for footwear testing
- prEN 13400 / ISO 17709 - sampling locations for footwear components
Keywords: ISO 22652:2002, perspiration resistance, footwear test method, insoles, lining, insocks, artificial sweat, ageing test, dimensional stability.
