ISO 18066:2015

INTERNATIONAL ISO
STANDARD 18066
First edition
2015-04-01
Textiles — Manmade filament yarns
— Determination of shrinkage in
boiling water
Textiles — Fils de filaments synthétiques — Détermination du retrait
dans l’eau bouillante
Reference number
ISO 18066:2015(E)
©
ISO 2015

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ISO 18066:2015(E)

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ii © ISO 2015 – All rights reserved

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ISO 18066:2015(E)

Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Principle . 1
5  Apparatus and materials. 1
6  Test specimen . 3
6.1 Sampling . 3
6.2 Preparation of the test specimen . 3
6.3 Numbers of tests . 4
7  Test procedures . 4
7.1 Preconditioning and conditioning. 4
7.2 Measuring the initial length of the test specimens . 4
7.3 Boiling and drying treatment . 5
7.4 Measuring the length of the test specimens after treatment . 5
8  Calculation and expression of the results . 5
8.1 Calculation . 5
8.2 Precision . 5
9  Test report . 5
Annex A (informative) Precision experiment. 7
Bibliography . 8
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ISO 18066:2015(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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
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.
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INTERNATIONAL STANDARD ISO 18066:2015(E)
Textiles — Manmade filament yarns — Determination of
shrinkage in boiling water
1  Scope
This International Standard specifies a test method for the determination of the boiling water shrinkage
of non-textured and textured multifilament yarns (made of polyester, polyamide, polypropylene,
cellulose fibre, etc.)
Only automatic method is specified in this International Standard.
This International Standard is applicable to manmade 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 referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
shrinkage in boiling water
decrease in length of a specimen as a result of thermal treatment in boiling water, 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 boiling water. Shrinkage is calculated as variation
in length, measured before and after treatment.
5  Apparatus and materials
5.1  Skein winding reel
a) Reel with a circumference of (1 000 ± 2,5) mm, driven either automatically or manually.
b) A traversing mechanism to avert overlapping while a number of skeins being wound at the same time.
c) A tensioning device, to an accuracy of ±10 %, maintaining tension within the recommended limits.
d) A device to count the turns of the reel, preferably warning or stopping winding automatically, just
prior to the specified number of reel revolutions.
e) A mechanism to reduce the reel circumference is advisable for easy removal of the skein.
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ISO 18066:2015(E)

5.2  Automatic shrinkage tester (see Figure 1).
a) Automatically application of the specified tension, appliance to measure the length of the specimen
and to calculate the shrinkage based on the length values.
b) Resolution of the length measurement is 0,05 mm .
c) Fitted with a specimen holder, over 600 mm high, in which a number of skeins arranged and
tested in succession. Each skein is applied with a 2,5 cN load, which remains throughout the whole
testing procedure.
1
2
3
4
Key
1 specimen
...