ISO 2411:2024

Overview

ISO 2411:2024 - Rubber- or plastics-coated fabrics - specifies a standardized laboratory method for determining the coating adhesion strength of rubber- or plastics‑coated fabrics. The fifth edition (2024) updates procedures for specimen preparation, testing atmospheres and result interpretation to help ensure reproducible, comparable measurements of coating-to-textile bonding and delamination behaviour.

Key topics and technical requirements

• Scope and purpose: Measures the adhesion strength between coating and textile substrate to detect potential delamination failures.
• Specimen quantity and orientation: Ten specimens total - five cut parallel to the fabric longitudinal direction and five parallel to the transverse direction. Each specimen must have at least 200 mm length and ≥20% extra width before trimming.
• Specimen dimensions: Trimmed width to (50 ± 0.5) mm or (20 ± 0.5) mm while avoiding damage to substrate threads.
• Preparation methods: Two methods depending on coating strength:
  • Method 1: mechanically separate coating from substrate where coating strength exceeds adhesive bond.
  • Method 2: bond or weld two specimens face-to-face (or use a rubber sheet for PU coatings) when coating is not strip-able.
• Conditioning and testing atmosphere: Conditioning per ISO 2231 (method 1); minimum exposure 16 h for one-sided coatings, 24 h for two‑sided coatings. Select testing atmospheres A–C from ISO 2231 (commonly 23 °C or 27 °C depending on climate).
• Time interval constraints: Minimum 16 h after manufacture; non-product tests typically ≤4 weeks, product tests normally ≤3 months unless otherwise agreed.
• Wet adhesion option: Procedure for testing while wet - immersion in a non‑ionic wetting agent (≤0.1% v/v) for (1 ± 0.1) h (or 6 h / 24 h if equilibrium suspected) with ~20:1 liquor ratio, then immediate testing.
• Apparatus and calibration: Uses tensile testing equipment conforming to ISO 5893 and force calibration per ISO 7500-1.
• Results and reporting: Procedures for calculation of midpoint, mean results, adhesion strength and failure type (delamination classification in Clause 9.5).

Applications and users

ISO 2411:2024 is used by:

• Textile and coated-fabric manufacturers for quality control and product development.
• R&D labs evaluating new coating formulations and adhesion promoters.
• Third‑party testing and certification bodies assessing conformance to customer or regulatory requirements.
• End-users in technical textiles (e.g., inflatable products, outdoor and marine fabrics, protective coverings) who need assurance against delamination.

Practical benefits include consistent, reproducible coating adhesion data to support material selection, process control and warranty claims.

Related standards

• ISO 2231:1989 - Standard atmospheres for conditioning and testing
• ISO 2286-1 - Determination of roll characteristics (length, width, net mass)
• ISO 5893 - Specifications for tensile test equipment
• ISO 7500-1 - Calibration and verification of force-measuring systems

Keywords: ISO 2411:2024, coating adhesion test, rubber- or plastics-coated fabrics, adhesion strength, coated fabrics testing, specimen preparation, wet adhesion.