ISO 1833-29:2020
(Main)Textiles - Quantitative chemical analysis - Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid)
Textiles - Quantitative chemical analysis - Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid)
This document specifies a method, using sulfuric acid, to determine the mass percentage of polyamide, after removal of non-fibrous matter, in textiles made of binary mixtures of - polyamide with -polypropylene/polyamide bicomponent.
Textiles — Analyse chimique quantitative — Partie 29: Mélanges de polyamide avec bicomposant polypropylène/polyamide (méthode à l’acide sulfurique)
Le présent document spécifie une méthode de détermination, à l'acide sulfurique, de la masse, exprimée en pourcentage, de polyamide, après élimination des matières non fibreuses, dans les textiles composés de mélanges binaires de: — polyamide; avec — bicomposant polypropylène/polyamide.
General Information
- Status
- Published
- Publication Date
- 26-May-2020
- Technical Committee
- ISO/TC 38 - Textiles
- Drafting Committee
- ISO/TC 38/WG 22 - Composition and chemical testing
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 21-Nov-2025
- Completion Date
- 13-Dec-2025
Overview
ISO 1833-29:2020 is an international standard published by the International Organization for Standardization (ISO) that specifies a precise chemical method for analyzing textiles. This part of the ISO 1833 series focuses on quantitative analysis of binary mixtures consisting of polyamide combined with polypropylene/polyamide bicomponent fibers. The method utilizes sulfuric acid to accurately determine the mass percentage of polyamide present in such textile materials after removing non-fibrous matter.
This analytical approach is critical in quality control and research for textile manufacturers and laboratories to ensure material composition meets product specifications, especially for complex bicomponent fibers often used in carpets and specialized textile products.
Key Topics
Scope and Purpose
The method targets textiles composed of two components: polyamide fibers and polypropylene/polyamide bicomponent fibers where polyamide fibrils are embedded within a polypropylene matrix.Chemical Principle
Polyamide is selectively dissolved using 75% sulfuric acid, allowing the residue of polypropylene/polyamide bicomponent to be separated, washed, dried, and weighed. The percentage mass of polyamide is then calculated based on the difference.Reagents and Apparatus
The process calls for a specific preparation of sulfuric acid diluted within a narrow concentration range (73% to 77%), diluted sulfuric acid, and diluted ammonia solutions. Equipment includes glass-stoppered conical flasks and filtration apparatus compliant with ISO 1833-1.Test Procedure
Textile samples are treated with sulfuric acid, shaken, and allowed to react at room temperature through specific timed intervals. Residues are filtered, washed sequentially with diluted acid, water, and ammonia solutions, then dried and weighed.Accuracy and Precision
The method achieves a confidence limit within ±1 percentage point at a 95% confidence level when applied to homogeneous textile mixtures, ensuring reliable and reproducible results.
Applications
Textile Industry Quality Control
Manufacturers can verify the exact composition of carpets and garments containing polyamide/polypropylene blends, meeting stringent quality and labeling regulations.Material Research and Development
R&D laboratories use this method to develop new textile blends and optimize fiber compositions, ensuring performance and durability of bicomponent textiles.Regulatory Compliance
Accurate chemical composition analysis supports compliance with international trade standards, labeling requirements, and environmental regulations.Component Differentiation in Complex Fibers
The method provides a clear distinction between polyamide in fiber mixtures and polyamide fibrils embedded within polypropylene matrices, critical for bicomponent textile evaluation.
Related Standards
ISO 1833-1: General Principles
Provides overarching testing principles and apparatus recommendations essential for correct implementation of chemical analysis methods.ISO 1833-7: Polyamide and Other Fibers (Formic Acid Method)
A related method for mixtures of polyamide with polypropylene, elastolefin, or aramid using formic acid, which is less suitable for bicomponent polyamide/polypropylene fibers.ISO 1833-18: Mixtures of Silk with Protein Fibers
Shares a similar sulfuric acid-based approach and operating conditions, serving as a reference point for ISO 1833-29 method development.ISO 2076:2013: Generic Names for Man-made Fibers
Defines terminology relevant to polyamide and bicomponent fibers used in this standard, ensuring clarity in material identification.
Keywords: ISO 1833-29, polyamide polypropylene bicomponent analysis, sulfuric acid textile testing, quantitative chemical analysis textiles, textile fiber composition, bicomponent fiber testing, textile quality control, polyamide mass percentage, ISO textile standards
ISO 1833-29:2020 - Textiles — Quantitative chemical analysis — Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid) Released:5/27/2020
ISO 1833-29:2020 - Textiles — Analyse chimique quantitative — Partie 29: Mélanges de polyamide avec bicomposant polypropylène/polyamide (méthode à l’acide sulfurique) Released:5/27/2020
Frequently Asked Questions
ISO 1833-29:2020 is a standard published by the International Organization for Standardization (ISO). Its full title is "Textiles - Quantitative chemical analysis - Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid)". This standard covers: This document specifies a method, using sulfuric acid, to determine the mass percentage of polyamide, after removal of non-fibrous matter, in textiles made of binary mixtures of - polyamide with -polypropylene/polyamide bicomponent.
This document specifies a method, using sulfuric acid, to determine the mass percentage of polyamide, after removal of non-fibrous matter, in textiles made of binary mixtures of - polyamide with -polypropylene/polyamide bicomponent.
ISO 1833-29:2020 is classified under the following ICS (International Classification for Standards) categories: 59.060.01 - Textile fibres in general. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 1833-29:2020 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 1833-29
First edition
2020-05
Textiles — Quantitative chemical
analysis —
Part 29:
Mixtures of polyamide with
polypropylene/polyamide
bicomponent (method using sulfuric
acid)
Textiles — Analyse chimique quantitative —
Partie 29: Mélanges de polyamide avec bicomposant polypropylène/
polyamide (méthode à l’acide sulfurique)
Reference number
©
ISO 2020
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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Published in Switzerland
ii © ISO 2020 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Test procedure . 2
8 Calculation and expression of results . 2
9 Precision . 3
Bibliography . 4
Foreword
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Agreement).
A list of all parts in the
...
NORME ISO
INTERNATIONALE 1833-29
Première édition
2020-05
Textiles — Analyse chimique
quantitative —
Partie 29:
Mélanges de polyamide avec
bicomposant polypropylène/
polyamide (méthode à l’acide
sulfurique)
Textiles — Quantitative chemical analysis —
Part 29: Mixtures of polyamide with polypropylene/polyamide
bicomponent (method using sulfuric acid)
Numéro de référence
©
ISO 2020
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2020
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
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Tél.: +41 22 749 01 11
Fax: +41 22 749 09 47
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Web: www.iso.org
Publié en Suisse
ii © ISO 2020 – Tous droits réservés
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe . 1
5 Réactifs . 2
6 Appareillage . 2
7 Mode opératoire d’essai. 2
8 Calcul et expression des résultats . 2
9 Fidélité . 3
Bibliographie . 4
Avant-propos
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