SIST EN ISO 9073-6:2025 PDF

Overview

SIST EN ISO 9073-6:2025: Nonwovens - Test methods - Part 6: Absorption sets out standardized laboratory methods for evaluating the behavior of nonwoven fabrics when exposed to liquids. Developed jointly by CEN and ISO, this standard specifies procedures for testing three key aspects: liquid absorbency time, liquid absorptive capacity, and liquid wicking rate (capillarity). These performance characteristics are essential for nonwovens used in absorbent products across various industries. Importantly, the test methods described do not apply to fabrics that contain super absorbent materials.

Key Topics

SIST EN ISO 9073-6:2025 addresses the following core areas in the testing of nonwoven textiles:

• Liquid Absorbency Time: Measurement of the time required for a fabric sample to become fully wetted by a test liquid under specified conditions.
• Liquid Absorptive Capacity: Assessment of the amount of liquid a sample can retain, expressed as a percentage of the mass of the dry fabric.
• Liquid Wicking Rate (Capillarity): Evaluation of the speed at which liquid is transported vertically into a nonwoven sample by capillary action.

Test procedures are standardized to ensure consistency and repeatability, referencing important conditioning and sampling guidelines from standards such as ISO 139 and ISO 186.

Applications

This standard is highly relevant to industries where the absorbency of nonwovens directly influences product performance and quality. It is commonly applied in:

• Personal hygiene products: Such as diapers, sanitary napkins, and adult incontinence pads, where rapid liquid uptake and high absorptive capacity are vital.
• Medical and healthcare textiles: Including dressings, surgical drapes, and wipes, which require efficient absorption and fluid management.
• Cleaning products: Nonwoven wipes and cloths, where fast wicking and sustained absorbency improve cleaning effectiveness.
• Filtration and technical applications: Where capillary action and fluid handling are important for operational performance.

Consistent testing ensures product reliability, safety, and effectiveness in end-use. Manufacturers, quality assurance professionals, and laboratories benefit from harmonized testing methods, supporting regulatory compliance and facilitating comparison across the industry.

Related Standards

Organizations may also reference the following standards for comprehensive evaluation of nonwoven textiles:

• ISO 9073 Series: Other parts of ISO 9073 cover different test methods for nonwovens, such as mechanical properties, thickness determination, and more.
• ISO 139: Standard atmospheres for conditioning and testing of textiles, essential for reproducible results in absorbency tests.
• ISO 186: Procedures for sampling paper and board, adopted here for fabric sampling methodologies.
• ISO 565: Specification of test sieves, relevant for apparatus construction detailed in absorbency testing.

By adhering to SIST EN ISO 9073-6:2025, organizations ensure internationally recognized, comparable results in the testing of absorbent properties for nonwovens, driving advances in both product development and regulatory acceptance.

Keywords: SIST EN ISO 9073-6:2025, nonwovens absorption testing, textile absorbency, liquid absorptive capacity, liquid wicking rate, CEN standards, ISO 9073-6, nonwoven test method, textile quality control, absorbent fabrics, capillarity in nonwovens.