Overview
EN ISO 9073-5:2025 - "Nonwovens - Test methods - Part 5: Determination of resistance to mechanical penetration (ball burst procedure)" is a CEN-endorsed ISO test method (published April 2025) for measuring the mechanical penetration resistance of nonwoven fabrics using a ball-burst procedure. The method is primarily intended for nonwoven fabrics with some elasticity where a conventional burst test is unsuitable. It defines the test principle, apparatus, sampling, conditioning and reporting requirements for consistent, repeatable results.
Key topics and technical requirements
- Test principle: A specimen is clamped horizontally under tension between grooved ring plates and loaded vertically by a polished steel ball until rupture (ball burst). The required equipment conversion uses a CRT tensile-testing machine in compression mode.
- Apparatus specifics:
- Polished steel ball: diameter (25,400 ± 0,005) mm (unless otherwise agreed).
- Ring clamp: internal diameter (44,500 ± 0,025) mm (unless otherwise agreed).
- Constant-rate-of-traverse (CRT) tensile-testing machine converted for compression mode and fitted with a ball burst attachment.
- Sampling and lot handling: Sampling references ISO 186; three samples are recommended as a baseline. The standard provides guidance and example sampling tables for attribute and variable inspection (AQL methods and the “s” method) and recommends agreement between purchaser and supplier on sampling plans.
- Conditioning: Specimens must be conditioned to moisture equilibrium per ISO 139 before testing; equilibrium is met when successive weighings (≥2 h apart) differ by ≤0.25% of specimen mass.
- Normative references: ISO 139, ISO 186, ISO 9092 (vocabulary), ISO 10012, ISO 2859-1, ISO 3951-1 and others are cited for complete test implementation and traceability.
- Reporting: The standard defines required test-report elements including ball and ring sizes (if non‑standard), test conditions and results.
Applications and who uses it
- Textile and nonwoven manufacturers: quality control and product development for elastic nonwovens (medical, hygiene, filtration, geotextiles, protective clothing).
- Independent testing laboratories: standardized method for customer specifications, certification and comparative performance data.
- Procurement and compliance teams: verify supplier claims about mechanical resistance and ensure product suitability for intended mechanical stresses.
- R&D and product engineers: evaluate material formulations, bonding methods and process changes that affect puncture/penetration resistance.
Keywords: EN ISO 9073-5:2025, ball burst, nonwovens test methods, resistance to mechanical penetration, CRT tensile-testing machine, ring clamp, polished steel ball, conditioning (ISO 139), sampling (ISO 186).
Related standards
This standard supersedes EN ISO 9073-5:2008 and should be used where reproducible ball-burst performance data are required for elastic nonwoven materials.
