Overview
SIST EN ISO 9073-11:2026, Nonwovens – Test methods – Part 11: Run-off (ISO 9073-11:2026) is an international standard that specifies methods for evaluating the run-off characteristics of nonwoven materials. Developed by CEN and based on ISO collaboration, this standard details procedures for measuring the amount of test liquid (simulated urine) that runs off a nonwoven specimen under controlled laboratory conditions. The testing methodology is designed primarily for comparing the run-off performance of different nonwoven fabrics rather than simulating real-life end-use scenarios.
The standard is essential for quality assurance and research within the nonwoven textiles industry, supporting the consistent performance evaluation of absorbent and repellent materials used in applications such as hygiene products and medical textiles.
Key Topics
SIST EN ISO 9073-11:2026 covers the following key areas:
- Standardized Run-Off Test Methods: Detailed procedures for assessing how much liquid runs off nonwoven fabrics, enabling repeatable comparisons across different samples.
- Three Test Variants:
- Option A: The basic method for hydrophilic (absorbent) nonwovens.
- Option B: A repeated test to evaluate performance consistency by subjecting the same sample to multiple liquid discharges.
- Option C: A modified test with a reduced table inclination, specially tailored for hydrophobic (liquid-repellent) nonwovens.
- Simulated Urine as Test Liquid: Using a standardized solution to mimic typical liquid challenges faced by absorbent products.
- Standard Absorbent Media: Use of specifically defined blotter paper as the absorbent backing to ensure test consistency.
- Sampling and Conditioning: Guidelines for specimen selection, conditioning to standard atmospheric conditions, and preparation to maintain reliability and traceability.
- Data Analysis and Reporting: Calculation of run-off mass and percentage, including requirements for comprehensive test reporting and recommendations for use of SI units.
Applications
SIST EN ISO 9073-11:2026 is widely applied in multiple sectors where nonwoven materials are used, including:
- Hygiene Products: Assessment of coverstock materials in diapers, sanitary napkins, and adult incontinence products to evaluate run-off and absorbency performance.
- Medical Textiles: Evaluation of nonwoven materials for bedding, drapes, surgical gowns, and wound dressings where liquid management is crucial for protection and comfort.
- Product Development and Quality Assurance: Manufacturers utilize this standard to benchmark material performance, compare different suppliers, and ensure compliance with industry expectations.
- Regulatory Compliance: Supports manufacturers in meeting European and international market requirements for test documentation and product claims.
- Research and Innovation: Facilitates R&D teams in optimizing fiber blends or fabric constructions for customized absorbency and repellency.
Related Standards
SIST EN ISO 9073-11:2026 is part of a broader framework of nonwoven test methods and textile standards. Related standards include:
- ISO 9073 Series:
- ISO 9073-6: Nonwovens - Test methods - Part 6: Absorption
- ISO 139: Textiles - Standard atmospheres for conditioning and testing
- NWSP 010.1: Three Standard Test Methods for Nonwoven Absorption
- NWSP 005.0: Nonwoven Sampling
- NWSP 70.3: Nonwoven Coverstock Liquid Strike‐Through Time Using Simulated Urine
- ISO 2859-1 & ISO 3951-1: General sampling procedures for inspection by attributes and variables
Practical Value
The adoption of SIST EN ISO 9073-11:2026 ensures that manufacturers, laboratories, and product developers in the nonwovens industry use a harmonized and reproducible approach when assessing liquid run-off properties. This drives higher product reliability, customer satisfaction, and regulatory alignment for nonwoven textiles in demanding liquid management applications. For best results, the standard should be implemented as part of a comprehensive quality management or R&D program aligned with other relevant nonwoven test methods.