Overview
ISO 2411:2017 - "Rubber- or plastics-coated fabrics - Determination of coating adhesion" - specifies a standardized laboratory method to measure the adhesion strength between a coating (rubber or plastic) and its textile substrate. The fourth edition updates specimen preparation options, conditioning atmospheres and reporting requirements. The standard is intended to help assess delamination, peel failure and overall coating-to-fabric bond integrity.
Key Topics and Requirements
- Scope: Method for determining coating adhesion strength of coated fabrics.
- Specimen sampling: Ten test specimens per sample - five cut parallel to the longitudinal direction and five transverse (special rules for pile substrates).
- Specimen dimensions: Trimmed widths of (50 ± 0.5) mm or (20 ± 0.5) mm; original samples must exceed trimmed width by at least 20% and be ≥ 200 mm long.
- Preparation methods:
- Method 1: Physically cut and separate coating where the coating film strength exceeds the adhesive bond.
- Method 2: Bond or weld two specimens face-to-face (adhesive or welding methods allowed) when the coating cannot be stripped continuously.
- Conditioning and atmosphere: Follow ISO 2231 standard atmospheres. Minimum conditioning time is specified (typically 16–24 h depending on single/double-sided coating). Testing atmospheres A–C may be used; 23 °C (temperate) or 27 °C (tropical) are cited as typical.
- Timing: Minimum 16 h between manufacture and testing; for product testing, the time between manufacture and test normally should not exceed 3 months.
- Wet adhesion: Procedures for determining adhesion when specimens are wet - immersion in a non-ionic wetting agent for (1 ± 0.1) h is specified.
- Terminology: Defines delamination types (coating-to-fabric peel, partial film tear, fabric failure, inseparable, etc.).
- Test equipment & reporting: References ISO 5893 and ISO 7500-1 for test machine specifications and calibration; results are calculated (mid‑point, mean, expressed as coating adhesion strength) and reported per Clause 10. Annex A offers guidance on interpreting autographic traces.
Applications
- Quality control and acceptance testing for coated textile products (awnings, tarpaulins, inflatable structures, protective clothing, technical textiles).
- Comparative evaluation of coating formulations, surface treatments and bonding processes.
- Failure analysis where delamination or peel is suspected.
- R&D for new coating/substrate systems to optimize adhesion.
Who Uses This Standard
- Textile and coating manufacturers
- Third‑party testing laboratories and certification bodies
- Product designers, R&D engineers and quality assurance teams
- Procurement/specification authors requiring reproducible adhesion data
Related Standards
- ISO 2231 - standard atmospheres for conditioning/testing
- ISO 2286-1 - roll characteristics (length, width, mass)
- ISO 5893 - test equipment (tensile/flexural machines)
- ISO 7500-1 - calibration/verification of force-measuring systems
Note: ISO 2411:2017 contains a safety warning; users should follow normal laboratory practice and applicable health and safety regulations.