SIST EN ISO 20932-3:2020/A1:2026

Full title: Textiles – Determination of the elasticity of fabrics – Part 3: Narrow fabrics – Amendment 1 (ISO 20932-3:2018/AMD 1:2025)

Published by: Slovenian Institute for Standardization (SIST)

ICS Classification:

59.080.01 – Textiles in general

59.080.30 – Textile fabrics

Purpose:

SIST EN ISO 20932-3:2020/A1:2026 is an amendment to ISO 20932-3:2020 that updates definitions, test procedures, and calculation methods for determining the elasticity of narrow fabrics (e.g., webbings, braids, elastic tapes, narrow trim). It clarifies key terms, provides explicit calculation steps for elongation, force decay, permanent deformation, and elastic recovery, and ensures standardized reporting across laboratories and industries.

Scope

Applies to narrow elastic fabrics such as webbings, straps, ribbons, and elastic tapes

Measures elasticity, elongation, force decay, permanent deformation, and recovery behaviour

Supports quality control, product development, compliance, and R&D

Key Updates in Amendment 1

Topic	Amendment Highlights
Definitions	Revised recovered extension/recovered elongation as a percentage complement to permanent deformation
Test Speed	Extension/retraction rate specified at 300% of initial length per minute (e.g., 100 mm → 300 mm/min)
Calculation Procedures	Explicit formulas for: - Elongation (S) at maximum force - Force decay due to time (A) and exercising (B) - Permanent deformation (C) - Recovered extension/elongation (D) - Elastic recovery (R)
Reporting	Indicate method used (A or B), number of cycles, initial length, pretension, holding periods, and all measurement conditions
Pretension Option	Procedures include testing with or without pretension; defines clamp distance and reference mark usage

Test Principle

Specimen clamping: Narrow fabric held under defined tension

Cyclic extension and retraction: Apply repeated cycles at specified speed

Measurements: Record elongation, force decay, permanent deformation, and recovery after repeated loading

Calculations: Use standardized formulas to determine elasticity, deformation, and recovery percentages

Required Testing Instruments

Core Testing Instruments:

Tensile/Elasticity Tester for Narrow Fabrics – capable of precise elongation and retraction at 300% initial length per minute

Clamps / Specimen Holders – accommodate narrow fabrics and allow pretension or no-pretension testing

Force Sensors / Load Cells – measure maximum force and force decay

Cycle Control / Motorized Drive – programmable for repeated cycles with consistent speed

Timer / Data Logger – record elongation, cycle count, and hold times

Auxiliary / Safety Equipment:

Conditioning Chamber – maintain standard temperature and humidity before testing

Protective Gloves and Lab Coat – operator safety

Using these instruments ensures accurate, repeatable, and standardized elasticity measurements in narrow fabrics.

Applications

Quality Control: Ensure consistent elasticity for webbings, elastic tapes, ribbons, and straps

Product Development & R&D: Evaluate deformation, recovery, and durability under repeated loading

Compliance & Specifications: Verify narrow fabrics meet performance requirements in garments, medical elastic bands, automotive components, or consumer products

Independent Testing: For certification and laboratory verification of elastic properties

Users of SIST EN ISO 20932-3:2020/A1:2026

Textile manufacturers and converters producing narrow elastic components

Quality control and independent testing laboratories

Product designers and R&D teams evaluating mechanical performance

Procurement, compliance, and standards officers specifying performance metrics

Related Standards

Standard	Relevance
ISO 20932 series	Determination of fabric elasticity
ISO 20932-3:2020	Original Part 3: Narrow fabrics
ISO/EN textile testing standards	Ensures alignment with CEN adoption and Vienna Agreement

Professional Testing instruments

Qinsun Instruments specializes in textile testing instruments and provides complete solutions for SIST EN ISO 20932-3:2020/A1:2026. Our equipment enables precise, reliable, and repeatable measurement of elasticity, recovery, and deformation in narrow fabrics such as webbings, elastic tapes, and technical ribbons.

2026-01-04 16:41