ISO 9073-18:2023

Overview

ISO 9073-18:2023 is an international standard developed by the International Organization for Standardization (ISO) under the textiles technical committee. Titled "Nonwovens - Test methods - Part 18: Determination of tensile strength and elongation at break using the grab tensile test," this document defines precise test procedures for determining the tensile strength and elongation at break of nonwoven materials using the grab tensile method. This standard is essential for quality assessment in the production and application of nonwoven fabrics, ensuring reliable performance and safety across a variety of sectors.

The method specified in ISO 9073-18:2023 employs constant rate of specimen extension (CRE) tensile testers. It applies to both dry (conditioned) and wet states, though it is not suitable for materials with a high percentage of stretch. Results from different types of tensile testing machines-particularly those that do not use the CRE principle-are not directly comparable.

Key Topics

• Scope of Application: The standard details how to determine breaking force and elongation at break for nonwovens, excluding highly stretchable materials.
• Testing Equipment: Specifies the use of constant rate of extension (CRE) tensile testers as the recommended apparatus. Other types, like constant rate of loading (CRL) instruments, are referenced only for informational purposes.
• Sample Preparation: Covers the methods for sampling, conditioning, and preparing test specimens from nonwoven rolls or swatches, including both machine and cross-machine directions.
• Testing Procedure: Outlines step-by-step how to mount test specimens, set gauge length and extension rate, and conduct the grab tensile test for accurate and repeatable results.
• Measurement and Calculation: Details how to measure maximum force and elongation at break, as well as how to calculate averages, coefficients of variation, and report results.
• Test Reporting: Requires comprehensive documentation, including test methodology, equipment used, sample identification, individual test outcomes, and relevant testing conditions.

Applications

ISO 9073-18:2023 plays a critical role in various industries utilizing nonwoven fabrics, such as:

• Textiles Manufacturing: Ensures product quality and performance for items such as filters, hygiene products, automotive components, and geotextiles.
• Quality Control Laboratories: Provides standardized methods for routine testing and research, contributing to batch consistency and product development.
• Procurement and Compliance: Helps buyers and suppliers establish and verify product strength and durability against recognized international benchmarks.
• Regulatory Assessment: Supports organizations in meeting legal and safety standards, especially in sectors where material strength under tension and elongation is critical.

Related Standards

Professionals working with nonwovens and tensile testing may also reference these related ISO standards:

• ISO 9073 Series: A comprehensive series covering various nonwoven test methods for physical and mechanical properties.
• ISO 139: Standard atmospheres for conditioning and testing textiles.
• ISO 7500-1: Calibration and verification requirements for tension/compression testing machines.
• ISO 3696: Specifications for water used in laboratory testing procedures.
• ISO 2859-1 / ISO 3951-1: Sampling procedures for inspection by attributes and variables, supporting effective product quality inspection practices.
• ISO 10012: Measurement management systems for equipment and processes.
• ISO 2062: Information on CRL apparatus, referenced for users with legacy testing machinery.

ISO 9073-18:2023 ensures the consistent, reliable measurement of tensile properties in nonwovens, supporting manufacturers, laboratories, and regulatory bodies in enhancing the safety, performance, and international acceptance of their products. Implementing this standard is key for organizations aiming to deliver quality nonwoven materials and maintain global competitiveness.