SIST EN ISO 2061:2010

Textiles - Determination of twist in yarns - Direct counting method (ISO 2061:2010)

This International Standard specifies a method for the determination of the direction of twist in yarns, the amount of twist, in terms of turns per unit length, and the change in length on untwisting, by the direct counting method. This International Standard is applicable to a) single yarns (spun and filament), b) plied yarns, and c) cabled yarns. Separate procedures are given for each type of yarn. The method is designed primarily for yarns in packages, but, with special precautions, the procedures can be used for yarns taken from fabrics. It is not suitable for theThis International Standard covers the determination of twist in plied and cabled yarns as follows: a) in plied yarns: the final twist of the plied yarns and the original twist of the single yarn before plying; b) in cabled yarns: - the final cabling twist of the yarn; - the original twist of the plied yarn after plying, but prior to the last stage of processing; - the twist of the single yarn before plying. If desired, the twist of single and plied yarn components as they lie in the final structure can be determined by the special procedrue given in 10.5.7. This International Standard is not applicable, except by agreement, to yarns which stretch more than 0,5 % when the tension increases from 0,5 cN to 1,0 cN per unit linear density of the yarn expressed in tex. Such yarns can be tested under special conditions of tension which are accepted by all parties interested in the test results. This International Standard is not suitable for products of open-end spinning and intermingled (interlaced) multifilament yarns. This International Standard is not applicable to yarns which are too large to permit their being placed in the clamps of the testing apparatus without crushing or distortion severe enough to affect the test results.

Textilien - Bestimmung der Drehung von Garnen - Direktes Zählverfahren (ISO 2061:2010)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Drehungsrichtung, der Anzahl der
Drehungen je Längeneinheit und der relativen Längenänderung beim Aufdrehen von Garnen und Zwirnen
durch ein direktes Zählverfahren fest.
1.2 Diese Internationale Norm ist anwendbar auf:
a) Einfachgarne (Spinnfasergarn und Filamentgarn);
b) zweifache und mehrfache Zwirne;
c) mehrstufige Zwirne.
Es werden für jede der oben genannten Garn- bzw. Zwirnart getrennte Verfahren angegeben. Die Verfahren
sind in erster Linie für Garne und Zwirne in Aufmachungseinheiten ausgelegt, aber mit besonderen Vorsichtsmaßnahmen
können die Verfahren auch für Garne und Zwirne verwendet werden, die aus Geweben
und Maschenwaren entnommen wurden. Es ist nicht geeignet für die Bestimmung der Drehung eines
Monofils.
ANMERKUNG Siehe auch ISO 1890 [1], die besonders für die Erfordernisse der Glasgewebetechnologie erarbeitet
wurde, und ISO 7211-4 [2].
1.3 Diese Internationale Norm ist anwendbar für die Bestimmung der Drehung von zwei- und mehrfachen
Zwirnen sowie von mehrstufigen Zwirnen.
a) Bei zwei- und mehrfachen Zwirnen: die Enddrehung des zwei- oder mehrfachen Zwirnes und die
Ausgangsdrehung des Einfachgarnes.
b) Bei mehrstufigen Zwirnen:
⎯ die Enddrehung des mehrstufigen Zwirnes;
⎯ die Ausgangsdrehung des zwei- oder mehrfachen Zwirnes, aber vor der letzten Bearbeitungsstufe;
⎯ die Drehung des Einfachgarnes vor dem Zwirnen.
1.4 Wenn gewünscht, kann für die Bestimmung der Drehung des Einfachgarnes und der Komponenten des
zwei- oder mehrfachen Zwirnes, wie sie im Endaufbau vorliegen, das Sonderverfahren nach 10.5.7 verwendet
werden.

Textiles - Détermination de la torsion des fils - Méthode par comptage direct (ISO 2061:2010)

L'ISO 2061:2010 spécifie une méthode de détermination du sens de torsion des fils, de la valeur de cette torsion, exprimée en tours par unité de longueur, et de la variation de longueur après détorsion par la méthode par comptage direct.
L'ISO 2061:2010 est applicable:
aux fils simples (filés et filaments);
aux fils retors;
aux fils câblés.
Des modes opératoires distincts sont donnés pour chaque type de fil. La méthode est destinée tout d'abord aux fils sur enroulements, mais avec quelques précautions elle est aussi applicable aux fils prélevés sur les étoffes. Elle ne convient pas à la détermination de la torsion d'un monofilament.
L'ISO 2061:2010 est applicable à la détermination des torsions suivantes des retors et des câblés.
Pour les fils retors: torsion finale des fils retors et torsion d'origine des fils simples avant retordage.
Pour les fils câblés:
torsion finale du fil câblé;
torsion du fil retors après retordage mais avant câblage;
torsion du fil simple avant retordage.

Tekstilije - Določanje zavojev preje - Metoda neposrednega štetja (ISO 2061:2010)

Ta mednarodni standard določa metodo za določevanje smeri zavojev preje, velikosti zavojev, v izrazih obratov na dolžino enote, in spremembo dolžine odvijanja z metodo direktnega štetja. Ta mednarodni standard velja za:
a) enojne preje (predene ali vlaknene),
b) večnitne preje in
c) pramenske preje.
Za vsako vrsto preje so podani ločeni postopki. Metoda je predvsem načrtovana za preje v paketih, vendar se s posebnimi previdnostnimi ukrepi lahko uporabi za preje, vzete it tkanin. Ni primerna za določanje zavoja v monofilamentu.
OPOMBA Glej tudi ISO 1890[1], ki je bil pripravljen posebej za potrebe tehnologije steklenih tkanin, in ISO 7211-4[2].
Ta mednarodni standarda zajema določanje zavojev v večnitnih in pramenskih prejah, kot sledi:
a) v večnitnih prejah: zadnji zavoj večnitnih prej in prvotni zavoj enojne preje pred večnitenjem;
b) v pramenskih prejah:
- zadnji pramenski zavoj preje;
- prvotni zavoj večnitne preje, po večnitenju, vendar pred zadnjo stopnjo obdelave;
- zavoj enojne preje pred večnitenjem.
Če je zaželeno, je lahko zavoj komponent enojne in večnitne preje, ko ležijo v končni sestavi, določen s posebnim postopkom, podanim v točki 10.5.7. Ta mednarodni standard ne velja, razen po dogovoru za preje, ki se raztegnejo več kot 0,5 %, ko se napetost poveča na enoto iz 0,5 cN na 1,0 cN linearne gostote preje, izražene v tex. Takšne preje se lahko preskuša pod posebnimi pogoji napetosti, na katere pristajajo vse stranke, zainteresirane za rezultate preskusa. Ta mednarodni standard ni primeren za proizvode predenja z odprtim koncem in pomešanimi (prepletenimi) večnitnimi prejami. Ta mednarodni standard ne velja za prediva, ki so prevelika, da bi jih bilo mogoče postaviti v spone preskusnega aparata, brez dovolj velikega mečkanja ali dovolj resne popačitve, kar bi vplivalo na končne rezultate.

General Information

• Status: Withdrawn
• Public Enquiry End Date: 19-Jul-2010
• Publication Date: 14-Sep-2010
• Withdrawal Date: 30-Aug-2015
• ICS: 59.080.20 - Yarns
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 24-Aug-2015
• Due Date: 16-Sep-2015
• Completion Date: 31-Aug-2015
• Ref Project: EN ISO 2061:2010 - Textiles - Determination of twist in yarns - Direct counting method (ISO 2061:2010)

Relations

• Replaced By: SIST EN ISO 2061:2015 - Textiles - Determination of twist in yarns - Direct counting method (ISO 2061:2015)
• Effective Date: 01-Oct-2015
• Replaces: SIST EN ISO 2061:1996 - Textiles - Determination of twist in yarns - Direct counting method (ISO 2061:1995)
• Effective Date: 01-Oct-2010

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 2061:2010
01-oktober-2010
1DGRPHãþD
SIST EN ISO 2061:1996
7HNVWLOLMH'RORþDQMH]DYRMHYSUHMH0HWRGDQHSRVUHGQHJDãWHWMD,62
Textiles - Determination of twist in yarns - Direct counting method (ISO 2061:2010)
Textilien - Bestimmung der Drehung von Garnen - Direktes Zählverfahren (ISO
2061:2010)
Textiles - Détermination de la torsion des fils - Méthode par comptage direct (ISO
2061:2010)
Ta slovenski standard je istoveten z: EN ISO 2061:2010
ICS:
59.080.20 Preje Yarns
SIST EN ISO 2061:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 2061:2010

---------------------- Page: 2 ----------------------

SIST EN ISO 2061:2010


EUROPEAN STANDARD
EN ISO 2061

NORME EUROPÉENNE

EUROPÄISCHE NORM
August 2010
ICS 59.080.20 Supersedes EN ISO 2061:1995
English Version
Textiles - Determination of twist in yarns - Direct counting
method (ISO 2061:2010)
Textiles - Détermination de la torsion des fils - Méthode par Textilien - Bestimmung der Drehung von Garnen - Direktes
comptage direct (ISO 2061:2010) Zählverfahren (ISO 2061:2010)
This European Standard was approved by CEN on 31 July 2010.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.






EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2061:2010: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO 2061:2010
EN ISO 2061:2010 (E)
Contents Page
Foreword .3

2

---------------------- Page: 4 ----------------------

SIST EN ISO 2061:2010
EN ISO 2061:2010 (E)
Foreword
This document (EN ISO 2061:2010) has been prepared by Technical Committee ISO/TC 38 "Textiles" in
collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is
held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2011, and conflicting national standards shall be withdrawn
at the latest by February 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 2061:1995.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 2061:2010 has been approved by CEN as a EN ISO 2061:2010 without any modification.
3

---------------------- Page: 5 ----------------------

SIST EN ISO 2061:2010

---------------------- Page: 6 ----------------------

SIST EN ISO 2061:2010

INTERNATIONAL ISO
STANDARD 2061
Third edition
2010-08-01

Textiles — Determination of twist in
yarns — Direct counting method
Textiles — Détermination de la torsion des fils — Méthode par
comptage direct




Reference number
ISO 2061:2010(E)
©
ISO 2010

---------------------- Page: 7 ----------------------

SIST EN ISO 2061:2010
ISO 2061:2010(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


COPYRIGHT PROTECTED DOCUMENT


©  ISO 2010
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland

ii © ISO 2010 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO 2061:2010
ISO 2061:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.2
3 Terms and definitions .2
4 Principle.3
5 Apparatus.3
6 Standard atmosphere.3
7 Sampling.3
8 Test specimens.4
8.1 Length.4
8.1.1 Single spun yarns.4
8.1.2 Single multifilament, plied and cabled yarns .4
8.2 Selection.4
8.3 Number of test specimens.4
9 Procedure 1 — Determination of the direction of twist.5
10 Procedure 2 — Determination of the amount of twist .6
10.1 Preliminary procedure .6
10.2 Single, spun yarn.6
10.3 Single, multifilament yarns.6
10.4 Plied yarns .7
10.5 Cabled yarns .7
11 Calculation of results.7
11.1 Average twist per specimen.7
11.2 Average twist per sample .8
11.3 Variation of observations .8
11.4 Change in length on untwisting.8
11.5 Twist factor (α).8
12 Expression of results.9
13 Test report.9
13.1 Single yarns .9
13.2 Plied yarns .10
13.3 Cabled yarns .10
Annex A (informative) Suggested procedure for sampling .11
Bibliography.12

© ISO 2010 – All rights reserved iii

---------------------- Page: 9 ----------------------

SIST EN ISO 2061:2010
ISO 2061:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 2061 was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and yarns.
This third edition cancels and replaces the second edition (ISO 2061:1995), of which it constitutes a minor
revision by replacing the use of the outdated term folded with plied.
The principal additional modifications consist of the following:
⎯ editing Clause 3, Terms and definitions, in accordance with the ISO/IEC Directives, Part 2:2004;
⎯ deleting publication dates from normative references;
⎯ a Bibliography has been added.

iv © ISO 2010 – All rights reserved

---------------------- Page: 10 ----------------------

SIST EN ISO 2061:2010
INTERNATIONAL STANDARD ISO 2061:2010(E)

Textiles — Determination of twist in yarns — Direct counting
method
1 Scope
1.1 This International Standard specifies a method for the determination of the direction of twist in yarns,
the amount of twist, in terms of turns per unit length, and the change in length on untwisting, by the direct
counting method.
1.2 This International Standard is applicable to
a) single yarns (spun and filament),
b) plied yarns, and
c) cabled yarns.
Separate procedures are given for each type of yarn. The method is designed primarily for yarns in packages,
but, with special precautions, the procedures can be used for yarns taken from fabrics. It is not suitable for the
determination of twist in a monofilament.
[1]
NOTE See also ISO 1890 , which was prepared especially for the needs of glass textile technology, and
[2]
ISO 7211-4 .
1.3 This International Standard covers the determination of twist in plied and cabled yarns as follows:
a) in plied yarns: the final twist of the plied yarns and the original twist of the single yarn before plying;
b) in cabled yarns:
⎯ the final cabling twist of the yarn;
⎯ the original twist of the plied yarn after plying, but prior to the last stage of processing;
⎯ the twist of the single yarn before plying.
1.4 If desired, the twist of single and plied yarn components as they lie in the final structure can be
determined by the special procedrue given in 10.5.7.
1.5 This International Standard is not applicable, except by agreement, to yarns which stretch more than
0,5 % when the tension increases from 0,5 cN to 1,0 cN per unit linear density of the yarn expressed in tex.
Such yarns can be tested under special conditions of tension which are accepted by all parties interested in
the test results.
1.6 This International Standard is not suitable for products of open-end spinning and intermingled
(interlaced) multifilament yarns.
1.7 This International Standard is not applicable to yarns which are too large to permit their being placed in
the clamps of the testing apparatus without crushing or distortion severe enough to affect the test results.
© ISO 2010 – All rights reserved 1

---------------------- Page: 11 ----------------------

SIST EN ISO 2061:2010
ISO 2061:2010(E)
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 2, Textiles — Designation of the direction of twist in yarns and related products
ISO 139, Textiles — Standard atmospheres for conditioning and testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
twist
number of turns about the axis of a yarn based on its nominal gauge length before untwisting
NOTE Twist should preferably be expressed as turns per metre (turns/m), but it may be expressed as turns per
centimetre (turns/cm).
3.2
gauge length
distance between two effective clamping points of the test specimen mounted in the testing equipment
3.3
initial length
length of a test specimen under a specified pretension at the beginning of a test
3.4
change in length on untwisting
increase or decrease in initial length observed when the specimen is untwisted, expressed as the percentage
extension, or contraction, based on the specimen initial length
3.5
moisture equilibrium for testing
that state reached when the rate of increase in mass of a sample or specimen in a specified (test) atmosphere
does not exceed that prescribed for the material being tested
NOTE 1 See ISO 139.
NOTE 2 A textile material is in moisture equilibrium with the ambient atmosphere when it does not exchange water with
this atmosphere; its mass then remains constant as long as the experiment is carried out in an unchanged atmosphere.
For test purposes, moisture equilibrium is reached by absorption, starting from a relatively low moisture content.
3.6
yarn package
length or lengths of yarn in a form suitable for use, handling, storing or shipping
NOTE Packages may be comprised of unsupported yarn, such as balls, or supported yarn, such as skeins, cakes,
bobbins, cops, cones, pirns, spools, tubes or beams.
3.7
twist factor
measure of the spiralling orientation of the fibres in a spun yarn or of the filaments in a filament yarn
NOTE The twist factor is related to the angle which fibres on the surface of the yarn make with the axis of the yarn,
and is a measure of the hardness of the resulting yarn due to twist.
2 © ISO 2010 – All rights reserved

---------------------- Page: 12 ----------------------

SIST EN ISO 2061:2010
ISO 2061:2010(E)
4 Principle
The twist in a known length of yarn is removed by rotating one end of the specimen with respect to the other
until the components of the yarn being tested are parallel. The exact number of turns required to remove the
twist is reported in terms of turns per unit length of yarn.
5 Apparatus
5.1 Twist counter, consisting of a pair of clamps, one of which is rotatable in either direction and postively
connected to a revolution counter. The position of one or both clamps shall be adjustable to permit testing
yarn lengths from 10 mm to 500 mm. There shall be no play in the clamp which might affect the gauge length.
5.1.1 Means shall be provided for applying tension to the specimen and for rapidly determining the
specimen length with an accuracy of ±0,5 mm or ±2 %, whichever is smaller.
NOTE The limit of 2 % is consistent with the highest accuracy required in counting the number of turns in the
specimen.
5.1.2 The counting device shall be capable of recording the number of revolutions of the rotatable clamp.
5.1.3 If the contraction or extension of the untwisted specimen is to be measured, the movable but
nonr
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Textiles - Détermination de la torsion des fils - Méthode par comptage direct (ISO/FDIS 2061:2010)Textiles - Determination of twist in yarns - Direct counting method (ISO/FDIS 2061:2010)59.080.20PrejeYarnsICS:Ta slovenski standard je istoveten z:FprEN ISO 2061kSIST FprEN ISO 2061:2010en01-junij-2010kSIST FprEN ISO 2061:2010SLOVENSKI
STANDARD



kSIST FprEN ISO 2061:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN ISO 2061
April 2010 ICS 59.080.20 Will supersede EN ISO 2061:1995English Version
Textiles - Determination of twist in yarns - Direct counting method (ISO/FDIS 2061:2010)
Textiles - Détermination de la torsion des fils - Méthode par comptage direct (ISO/FDIS 2061:2010)
This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 248.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN ISO 2061:2010: EkSIST FprEN ISO 2061:2010



FprEN ISO 2061:2010 (E) 2 Contents Page Foreword .3 kSIST FprEN ISO 2061:2010



FprEN ISO 2061:2010 (E) 3 Foreword This document (FprEN ISO 2061:2010) has been prepared by Technical Committee ISO/TC 38 "Textiles" in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the secretariat of which is held by BSI. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN ISO 2061:1995. Endorsement notice The text of ISO/FDIS 2061:2010 has been approved by CEN as a FprEN ISO 2061:2010 without any modification.
kSIST FprEN ISO 2061:2010



kSIST FprEN ISO 2061:2010



Please see the administrative notes on page iii
RECIPIENTS OF THIS DRAFT ARE INVITED TOSUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICHTHEY ARE AWARE AND TO PROVIDE SUPPORT-ING DOCUMENTATION. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-LOGICAL, COMMERCIAL AND USER PURPOSES,DRAFT INTERNATIONAL STANDARDS MAY ONOCCASION HAVE TO BE CONSIDERED IN THELIGHT OF THEIR POTENTIAL TO BECOME STAN-DARDS TO WHICH REFERENCE MAY BE MADE INNATIONAL REGULATIONS.
Reference numberISO/FDIS 2061:2010(E)© ISO 2010 FINAL DRAFT ISO/TC 38/SC 23 Secretariat: ANSI Voting begins on: 2010-04-15 Voting terminates on: 2010-06-15
INTERNATIONAL STANDARD ISO/FDIS2061Textiles — Determination of twist in yarns — Direct counting method Textiles — Détermination de la torsion des fils — Méthode par comptage direct
kSIST FprEN ISO 2061:2010



ISO/FDIS 2061:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Copyright notice This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permission being secured. Requests for permission to reproduce should be addressed to either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
+ 41 22 749 01 11 Fax
+ 41 22 749 09 47 E-mail
[e-mail] Web
www.iso.org Reproduction may be subject to royalty payments or a licensing agreement. Violators may be prosecuted.
ii © ISO 2010 – All rights reserved
kSIST FprEN ISO 2061:2010



ISO/FDIS 2061:2010(E) © ISO 2010 – All rights reserved iii ISO/CEN PARALLEL PROCESSING This final draft has been developed within the International Organization for Standardization (ISO), and processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement. The final draft was established on the basis of comments received during a parallel enquiry on the draft. This final draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel two-month approval vote in ISO and formal vote in CEN. Positive votes shall not be accompanied by comments. Negative votes shall be accompanied by the relevant technical reasons.
kSIST FprEN ISO 2061:2010



ISO/FDIS 2061:2010(E) iv © ISO 2010 – All rights reserved Contents Page Foreword.v 1 Scope.1 2 Normative references.2 3 Terms and definitions.2 4 Principle.3 5 Apparatus.3 6 Standard atmosphere.3 7 Sampling.3 8 Test specimens.4 8.1 Length.4 8.1.1 Single spun yarns.4 8.1.2 Single multifilament, plied and cabled yarns.4 8.2 Selection.4 8.3 Number of test specimens.4 9 Procedure 1 — Determination of the direction of twist.5 10 Procedure 2 — Determination of the amount of twist.6 10.1 Preliminary procedure.6 10.2 Single, spun yarn.6 10.3 Single, multifilament yarns.6 10.4 Plied yarns.7 10.5 Cabled yarns.7 11 Calculation of results.7 11.1 Average twist per specimen.7 11.2 Average twist per sample.8 11.3 Variation of observations.8 11.4 Change in length on untwisting.8 11.5 Twist factor (α).8 12 Expression of results.9 13 Test report.9 13.1 Single yarns.9 13.2 Plied yarns.10 13.3 Cabled yarns.10 Annex A (informative)
Suggested procedure for sampling.11 Bibliography.12
kSIST FprEN ISO 2061:2010



ISO/FDIS 2061:2010(E) © ISO 2010 – All rights reserved v 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 2061 was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and yarns. This third edition cancels and replaces the second edition (ISO 2061:1995), of which it constitutes a minor revision by replacing the use of the outdated term folded with plied. The principal additional modifications consist of the following: ⎯ editing Clause 3, Terms and definitions, in accordance with the ISO/IEC Directives, Part 2:2004;
⎯ deleting publication dates from normative references; ⎯ a Bibliography has been added.
kSIST FprEN ISO 2061:2010



kSIST FprEN ISO 2061:2010



FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 2061:2010(E) © ISO 2010 – All rights reserved 1 Textiles — Determination of twist in yarns — Direct counting method 1 Scope 1.1 This International Standard specifies a method for the determination of the direction of twist in yarns, the amount of twist, in terms of turns per unit length, and the change in length on untwisting, by the direct counting method. 1.2 This International Standard is applicable to a) single yarns (spun and filament), b) plied yarns, and c) cabled yarns. Separate procedures are given for each type of yarn. The method is designed primarily for yarns in packages, but, with special precautions, the procedures can be used for yarns taken from fabrics. It is not suitable for the determination of twist in a monofilament. NOTE See also ISO 1890[1], which was prepared especially for the needs of glass textile technology, and ISO 7211-4[2]. 1.3 This International Standard covers the determination of twist in plied and cabled yarns as follows: a) in plied yarns: the final twist of the plied yarns and the original twist of the single yarn before plying; b) in cabled yarns: ⎯ the final cabling twist of the yarn; ⎯ the original twist of the plied yarn after plying, but prior to the last stage of processing; ⎯ the twist of the single yarn before plying. 1.4 If desired, the twist of single and plied yarn components as they lie in the final structure can be determined by the special procedrue given in 10.5.7. 1.5 This International Standard is not applicable, except by agreement, to yarns which stretch more than 0,5 % when the tension increases from 0,5 cN to 1,0 cN per unit linear density of the yarn expressed in tex. Such yarns can be tested under special conditions of tension which are accepted by all parties interested in the test results. 1.6 This International Standard is not suitable for products of open-end spinning and intermingled (interlaced) multifilament yarns. 1.7 This International Standard is not applicable to yarns which are too large to permit their being placed in the clamps of the testing apparatus without crushing or distortion severe enough to affect the test results. kSIST FprEN ISO 2061:2010



ISO/FDIS 2061:2010(E) 2 © ISO 2010 – All rights reserved 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2, Textiles — Designation of the direction of twist in yarns and related products ISO 139, Textiles — Standard atmospheres for conditioning and testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 twist number of turns about the axis of a yarn based on its nominal gauge length before untwisting NOTE Twist should preferably be expressed as turns per metre (turns/m), but it may be expressed as turns per centimetre (turns/cm). 3.2 gauge length distance between two effective clamping points of the test specimen mounted in the testing equipment 3.3 initial length length of a test specimen under a specified pretension at the beginning of a test 3.4 change in length on untwisting increase or decrease in initial length observed when the specimen is untwisted, expressed as the percentage extension, or contraction, based on the specimen initial length 3.5 moisture equilibrium for testing that state reached when the rate of increase in mass of a sample or specimen in a specified (test) atmosphere does not exceed that prescribed for the material being tested NOTE 1 See ISO 139. NOTE 2 A textile material is in moisture equilibrium with the ambient atmosphere when it does not exchange water with this atmosphere; its mass then remains constant as long as the experiment is carried out in an unchanged atmosphere. For test purposes, moisture equilibrium is reached by absorption, starting from a relatively low moisture content. 3.6 yarn package length or lengths of yarn in a form suitable for use, handling, storing or shipping NOTE Packages may be comprised of unsupported yarn, such as balls, or supported yarn, such as skeins, cakes, bobbins, cops, cones, pirns, spools, tubes or beams. 3.7 twist factor measure of the spiralling orientation of the fibres in a spun yarn or of the filaments in a filament yarn NOTE The twist factor it is related to the angle which fibres on the surface of the yarn make with the axis of the yarn, and is a measure of the hardness of the resulting yarn due to twist. kSIST FprEN ISO 2061:2010



ISO/FDIS 2061:2010(E) © ISO 2010 – All rights reserved 3 4 Principle The twist in a known length of yarn is removed by rotating one end of the specimen with respect to the other until the components of the yarn being tested are parallel. The exact number of turns required to remove the twist is reported in terms of turns per unit length of yarn. 5 Apparatus 5.1 Twist counter, consisting of a pair of clamps, one of which is rotatable in either direction and postively connected to a revolution counter. The position of one or both clamps shall be adjustable to permit testing yarn lengths from 10 mm to 500 mm. There shall be no play in the clamp which might affect the gauge length. 5.1.1 Means shall be provided for applying tension to the specimen and for rapidly determining the specimen length with an accuracy of ±0,5 mm or ±2 %, whichever is smaller. NOTE
...