ISO 5079:2020 PDF
Textile fibres — Determination of breaking force and elongation at break of individual fibres
Textile fibres — Determination of breaking force and elongation at break of individual fibres
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 12
- Дата публикации:
- 14 октября 2020 г.
- Издание:
- ISO IS 5079 edition 3 version 1
- ICS:
- 59.060.01
This document specifies the method and conditions of test for the determination of the breaking force and elongation at break of individual fibres in the conditioned or wet state. The determination of these fibre properties, when carried out on different kinds of testing equipment, will not generally give identical results. To avoid such differences, this document is restricted to the use of constant-rate-of-extension testing machine. It is applicable to all fibres, including crimped fibres, provided that the length of fibre available enables the gauge length specified in this document. NOTE For natural fibres (especially wool and cotton), the breaking test most commonly performed is that of bundles of fibres (see ISO 3060 and IWTO 32‑82).
Abstract
Overview
ISO 5079:2020 - Textile fibres: Determination of breaking force and elongation at break of individual fibres specifies a laboratory method to measure the breaking force and elongation at break of single textile fibres in the conditioned or wet state. The standard restricts testing to a constant‑rate‑of‑extension (CRE) testing machine to ensure comparable results across laboratories. It applies to all fibres (including crimped fibres) provided the specimen length allows the specified gauge length.
Key topics and technical requirements
- Test principle: Individual fibres are extended at constant rate of extension until rupture; record maximum force and elongation at break.
- Equipment: CRE tensile testing machine with suitable clamps, capability for 5–40 mm/min extension rates, and data recording for force/elongation curves.
- Metrological requirements: Machine accuracy to at least ISO 7500‑1 class 1 and ISO 10012 measurement confirmation. Specific limits include:
- force error ≤ ±1%
- extension error ≤ ±0.1 mm
- gauge length accuracy ≤ ±0.2 mm
- clamp displacement rate accuracy ≤ ±5%
- Rates of extension: Select based on expected elongation at break:
- 50% gauge length/min for mean elongation
Технические детали
- Технический комитет
- ISO/TC 38/SC 23 - Fibres and yarns
- SKU
- ISO 5079:2020
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