ISO 18067:2015

INTERNATIONAL ISO
STANDARD 18067
First edition
2015-05-15
Textiles — Synthetic filament yarns —
Determination of shrinkage in dry-hot
air (after treatment)
Textiles - Fils de filaments synthétiques - Détermination du taux de
retrait dans l’air sec et chaud
Reference number
©
ISO 2015
ISO 18067:2015(E)
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ii © ISO 2015 – All rights reserved

ISO 18067:2015(E)
Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definition . 1
4  Principle . 1
5  Apparatus and materials. 1
6  Sampling and preparation of the test specimen . 2
6.1 Sampling . 2
6.2 Preconditioning and conditioning. 3
6.3 Preparation of the test specimen . 3
6.3.1 Skein method . 3
6.3.2 Single-end method . 4
6.4 Number of specimens . 4
7  Testing conditions . 4
7.1 Dry-hot air treatment conditions . 4
7.2 Tension for the test specimen . 4
7.3 Equilibrium time for test specimen after thermal treatment . 5
8  Testing procedure . 5
8.1 Skein method A (Manual measurement) . 5
8.1.1 Measuring the initial length of the test specimens . 5
8.1.2 Thermal treatment of the test specimens . 5
8.1.3 Equilibrium after thermal treatment . 5
8.1.4 Measuring the length of the test specimens after treatment. 6
8.2 Skein method B (Automatic measurement) . 6
8.2.1 Measuring the initial length of the test specimens . 6
8.2.2 Thermal treatment of the test specimens . 6
8.2.3 Equilibrium after thermal treatment . 6
8.2.4 Measuring the length of the test specimens after treatment. 6
8.3 Single-end method . 6
8.3.1 Measuring the initial length of the test specimens . 6
8.3.2 Thermal treatment of the test specimens . 6
8.3.3 Equilibrium after thermal treatment . 6
8.3.4 Measuring the length of the test specimens after treatment. 7
9  Calculation and expression of results . 7
9.1 Calculation . 7
9.2 Precision . 7
10  Test report . 7
Annex A (informative) Precision experiments . 8
Bibliography . 9
ISO 18067:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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to Trade (TBT), see the following URL: Foreword — Supplementary information.
The committee responsible for this document is ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and yarns.
iv © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD  ISO 18067:2015(E)
Textiles — Synthetic filament yarns — Determination of
shrinkage in dry-hot air (after treatment)
1  Scope
This International Standard specifies methods for the determination of dry-hot air shrinkage (after
treatment) of synthetic filament yarns, skein method and single-end method. The skein method provides
two forms of measurement which are of manual and automatic types. The single-end method gives the
result by manual measurement.
In case of dispute, manual measurement procedure is to be used.
If these methods are not applicable, the corresponding test methods may be agreed between
interested parties.
This International Standard is applicable to synthetic filament yarns of linear density less than 3 000 dtex.
This International Standard is not applicable to partially oriented yarns.
2  Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
3  Terms and definition
For the purposes of this document, the following terms and definitions apply.
3.1
shrinkage in dry-hot air (after treatment)
decrease in length of a specimen as a result of thermal treatment in dry-hot air, expressed as a percentage
of its original length, which measured under tension before and after treatment
4  Principle
Under specific condition, a test specimen is treated in dry-hot air. Shrinkage is calculated as variation in
length, measured before and after treatment.
5  Apparatus and materials
5.1  Skein winding reel, which meets the following requirements:
a) 1 000 ± 2,5 mm reel circumference, driven either automatically or manually;
b) a traversing mechanism to avert overlapping when several skeins are wound at the same time;
c) a tensioning device to maintain tension within the recommended limits, accurate to within ± 10 %;
d) a device to count reel revolutions, preferably capable to stop winding automatically and warn when
nearing the specified number of reel revolutions;
ISO 18067:2015(E)
e) a mechanism to reduce the reel circumference for easy removal of the skein.
5.2  Length-measuring stand, which meets the following requirements:
a) a stand for measuring specimen length of least 1 mm gauge length;
b) a millimetre scale to determine specimen length, accurate to within ±1 mm;
c) a steel hook or a clamp, where the top of the hook or the lower side of the clamp (where the specimen
hung from) is positioned in line with the zero index of the scale;
d) tensioning weights with hooks or clamps for applying tensile force to specimens, accurate to
within ±10 %.
5.3  Automatic shrinkage tester, which meets the following requirements:
a) automatically applies specified tension, measures specimen length, and calculates the shrinkage
based on length values;
b) 0,05 mm resolution of length measurement;.
c) a specimen holder for suspending specimens more than 600 mm high, which can consistently hold
2,5 cN load per skein for the duration of the testing procedure with several skeins arranged and
tested in succession.
NOTE Other mechanical devices may be used for the test provided that equivalent results are obtained.
5.4  Ventilated oven, which meets the following requirements:
a) a holder for suspending spec
...