ISO 13934-2-2014 PDF

Full title and description

Textiles — Tensile properties of fabrics — Part 2: Determination of maximum force using the grab method (ISO 13934-2:2014). This International Standard specifies a reproducible laboratory procedure (the grab test) for measuring the maximum tensile force (peak load) of fabric specimens using a constant‑rate‑of‑extension (CRE) tensile testing machine; it is principally intended for woven textile fabrics and certain stretch fabrics.

Abstract

ISO 13934-2:2014 defines the grab (grip) test for determination of the maximum force of textile fabrics. It covers specimen selection and preparation, clamping arrangements for the grab method, test speeds (CRE), conditioning and wet‑state testing, required instrumentation accuracy and reporting of results. The method is not normally applicable to geotextiles, many nonwovens, coated fabrics, textile‑glass fabrics or fabrics made from carbon fibres or polyolefin tape yarns.

General information

• Status: Published (International Standard).
• Publication date: February 2014 (Edition 2).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.30 — Textile fabrics.
• Edition / version: Edition 2 (2014).
• Number of pages: 9 (ISO published document length).

Scope

This part of ISO 13934 specifies a constant‑rate‑of‑extension (CRE) grab testing procedure for determination of the maximum force of fabric specimens in the dry (standard atmosphere) and wet states. The procedure is mainly applicable to woven fabrics (including those with elastomeric components or mechanical/chemical stretch finishes) and may be applied to other fabric types where appropriate; it explicitly excludes or is not normally applicable to geotextiles, many nonwovens, coated fabrics, textile‑glass woven fabrics, carbon‑fibre fabrics and polyolefin tape‑yarn fabrics. The method is restricted to CRE testing machines and defines specimen mounting, clamping (grab) dimensions and test conditions.

Key topics and requirements

• Test principle: central portion of a specimen is gripped (grabbed) and extended at a constant rate until rupture; record maximum force (peak load).
• Specimen dimensions and cutting: standard specimen width (typically 100 mm ± 2 mm), specified gauge length options (commonly 100 mm or 75 mm by agreement) and instructions to avoid selvedges or biased areas.
• Clamping (grab) arrangement: defined effective grip area and jaw/packing options to ensure reproducible clamping of the central portion of the specimen.
• Rate of extension: fixed CRE rates specified according to expected elongation (typical grab test linear rate ≈ 50 mm/min, with alternatives depending on elongation category and gauge length).
• Conditioning and atmosphere: tests on specimens conditioned to the standard atmosphere for testing (referenced ISO conditioning standards) and procedure for wet testing (immersion and wetting agents when applicable).
• Number of specimens and sampling: minimum specimen counts and procedures for taking warp and weft (or course/wale) sets to obtain representative results.
• Instrumentation and accuracy: use of CRE tensile testing machines with adequate force measuring accuracy (metrological confirmation and recommended class of force measurement); minimum data acquisition rate guidance.
• Calculation and reporting: expression of maximum force results, rounding, units (force in newtons), and required test report content (method variant, specimen orientation, conditioning, wet/dry state, number of specimens, instrument details, and results summary).

Typical use and users

Used by textile and fabric manufacturers for quality control and product specification, by independent test houses and certification bodies for compliance and reporting, by garment and technical textile developers for material selection and R&D, and by purchasers and specifiers who require standardized tensile data for contracts and performance evaluation. Laboratories performing the test typically follow ISO 13934‑2 alongside general textile conditioning and testing standards.

Related standards

ISO 13934-2 is part of the ISO 13934 series on tensile properties of fabrics. Closely related documents include ISO 13934-1:2013 (strip method — determination of maximum force and elongation at maximum force) and national/adopted versions such as EN ISO 13934-2:2014. Normative references within the standard commonly include ISO 139 (conditioning), ISO 3696 (water for wet testing), ISO 10012/ISO 7500 series (measurement and machine accuracy) and other metrology/test reporting standards.

Keywords

grab test, grab method, tensile properties, tensile strength, maximum force, CRE (constant‑rate‑of‑extension), fabric testing, woven fabrics, wet testing, conditioning, specimen preparation.

FAQ

Q: What is this standard?

A: ISO 13934-2:2014 is an International Standard that defines the grab (grip) tensile test procedure to determine the maximum force of fabrics using a constant‑rate‑of‑extension (CRE) tensile testing machine.

Q: What does it cover?

A: It covers specimen preparation and selection, grab clamping arrangements, test speeds (CRE), conditioning (dry and wet testing procedures), instrumentation accuracy requirements, test execution and reporting of maximum force (peak load) results for primarily woven fabrics. It also states which fabric types the method is not normally applicable to.

Q: Who typically uses it?

A: Fabric manufacturers, textile testing laboratories, R&D groups, garment and technical textile designers, procurement/specification teams and conformity assessment bodies use this standard for quality control, specification and comparative testing.

Q: Is it current or superseded?

A: ISO 13934-2:2014 is the current published edition (Edition 2, 2014). ISO standards are subject to periodic review (typically every five years); users should check national or ISO catalogues for any later confirmation, amendment or withdrawal.

Q: Is it part of a series?

A: Yes — it is Part 2 of the ISO 13934 series (Part 1 is the strip method ISO 13934-1:2013). The two parts cover alternative tensile testing methods (strip and grab) used for different applications and specimen preparations.

Q: What are the key keywords?

A: Key keywords include: grab test, tensile strength, maximum force, CRE, specimen preparation, fabric tensile properties, woven fabrics, wet testing and conditioning.