EN ISO 1833-29:2020 PDF

Name: EN ISO 1833-29:2020 — Textiles - Quantitative chemical analysis - Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid) (ISO 1833-29:2020)
SKU: EN ISO 1833-29:2020
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Textiles - Quantitative chemical analysis - Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid) (ISO 1833-29:2020)

Название (английский):

EN ISO 1833-29:2020

Textiles - Quantitative chemical analysis - Part 29: Mixtures of polyamide with polypropylene/polyamide bicomponent (method using sulfuric acid) (ISO 1833-29:2020)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 10 июня 2020 г.
Издание:: CEN EN 1833 edition 1 version 1
ICS:: 59.060.01

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Описание (английский):

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.

Abstract

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Стандарты, упомянутые в описании

Overview

EN ISO 1833-29:2020 specifies a quantitative chemical analysis method using sulfuric acid to determine the mass percentage of polyamide (after removal of non-fibrous matter) in textiles that are binary mixtures of polyamide with polypropylene/polyamide bicomponent. Adopted by CEN, this part of the ISO 1833 series is intended for laboratory and quality-control use where accurate, standardised content determination is required - notably in carpet and technical textile applications where bicomponent yarns are common.

Key Topics

Scope: Applicable to mixtures of polyamide with polypropylene/polyamide bicomponent. The bicomponent typically contains 10 % to 25 % by mass of polyamide fibrils within a polypropylene matrix.

Principle: Dissolve polyamide from a known dry mass of the specimen using 75 % (mass fraction) sulfuric acid; collect, wash, dry and weigh the remaining residue. The difference yields the polyamide/polypropylene bicomponent percentage.

Reagents: Uses 75 % (approx. 73–77 % acceptable range) sulfuric acid, plus specified diluted sulfuric acid and diluted ammonia rinses as described in ISO 1833-29.

Procedure summary: Add sulfuric acid (100 ml per gram of specimen), shake and stand periods at room temperature (three cycles including 30 min rests), filter through a weighed crucible, wash sequentially with diluted acid, water and diluted ammonia, rinse, dry and weigh the residue. Calculation follows ISO 1833-1 general instructions; the document specifies a correction factor d = 1.005 where required.

Precision: On homogeneous mixtures, confidence limits are within ±1 percentage point at the 95 % confidence level.

Applications

Quality control and composition verification for carpets and textile products containing polypropylene/polyamide bicomponent yarns.

Laboratory testing for material declarations, procurement specifications and regulatory compliance.

Comparative testing in research and development where accurate quantification of polyamide content is needed.

Practical benefits: a standardised, repeatable test method; compatibility with existing ISO 1833 test series procedures; clear precision parameters for interpreting results in QC workflows.

Related Standards

ISO 1833-1 - General principles and calculation methods used across ISO 1833 parts.

ISO 1833-7 - Method using formic acid for other polyamide mixtures (not suitable here because formic acid dissolves all polyamide components).

ISO 1833-18 - Sulfuric acid based method used as reference for adapting operating conditions.

ISO 2076 - Definitions for man-made fibre generic names (source for bicomponent definition).

This part of ISO 1833 is endorsed as EN ISO 1833-29:2020 by CEN and is intended as the harmonised test method for determination of polyamide in polyamide/ polypropylene-polyamide bicomponent textile mixtures.

EN ISO 1833-29:2020 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

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