BS ISO 16549:2021

$102.76

Textiles. Unevenness of textile strands. Capacitance method

Published By	Publication Date	Number of Pages
BSI	2021	20

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Categories: 59.060.01 - Textile fibres in general, BSI

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Description

This document describes a method, using capacitance measuring equipment, for determining the unevenness of linear density along the length of textile strands.

The method is applicable to tops, slivers, rovings, spun yarns and continuous filament yarns, made from either natural or man-made fibres, in the range of 4 tex (g/km) to 80 ktex (kg/km) for staple-fibre strands and 1 tex(g/km) to 600 tex (g/km) for continuous-filament yarns. It is not applicable to fancy yarns or to strands composed fully or partly of conductive materials such as metals; the latter requires an optical sensor (see A.4), and to raw silk filaments which are tested according to a specific standard.

The method describes the preparation of a variance-length curve, as well as the determination of periodicities of linear density. It also covers the counting of imperfections in the yarn, namely of neps and of thick and thin places.

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PDF Pages	PDF Title
2	National foreword
6	Foreword
7	Introduction
9	1 Scope 2 Normative references 3 Terms and definitions
11	4 Principle
12	5 Apparatus 6 Atmosphere for conditioning and testing
13	7 Sampling 8 Procedure 8.1 Setting of the apparatus 8.2 Setting of the diagram scale
14	8.3 Condenser assembly 8.4 Selection of running speed 8.5 Guiding facilities 8.6 Twisting device 8.7 Plot representing the linear density along the strand 8.8 Preliminary run 8.9 Test run 9 Calculations and expression of results
15	10 Test report
16	Annex A (informative) Other methods for the determination of unevenness
18	Bibliography

Additional information

Status	Definitive
Pages	20
Publication Date	2021-02-04
ISBN	978 0 539 12176 6
Standard Number	BS ISO 16549:2021
Title	Textiles. Unevenness of textile strands. Capacitance method
Identical National Standard Of	ISO 16549
Replaces	BS ISO 16549:2004
Descriptors	Staple fibre, Textiles, Natural fibres, Capacitance measurement, Yarn linear density determination, Filament (textile fibre), Textile testing, Textile fibres, Man-made fibres, Linear density, Yarn testing
Publisher	BSI
Committee	TCI/100
ICS Codes	59.060.01 - Textile fibres in general

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BS ISO 16549:2021

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