EN ISO 1890:2009

SLOVENSKI STANDARD
01-oktober-2009
1DGRPHãþD
SIST EN ISO 1890:1999
3UHMH]D]DRMDþHQMH'RORþHYDQMHVXþQRVWL,62
Reinforcement yarns - Determination of twist (ISO 1890:2009)
Verstärkungsgarne - Bestimmung der Drehungszahl (ISO 1890:2009)
Fils de renfort - Détermination de la torsion (ISO 1890:2009)
Ta slovenski standard je istoveten z: EN ISO 1890:2009
ICS:
59.100.01 0DWHULDOL]DRMDþLWHY Materials for the
NRPSR]LWRYQDVSORãQR reinforcement of composites
in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 1890
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 59.100.01 Supersedes EN ISO 1890:1997
English Version
Reinforcement yarns - Determination of twist (ISO 1890:2009)
Fils de renfort - Détermination de la torsion (ISO Verstärkungsgarne - Bestimmung der Drehungszahl (ISO
1890:2009) 1890:2009)
This European Standard was approved by CEN on 30 May 2009.
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, 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
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© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1890:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 1890:2009) has been prepared by Technical Committee ISO/TC 61 " Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by NBN.
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 December 2009, and conflicting national standards shall be withdrawn
at the latest by December 2009.
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 1890:1997.
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, 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 1890:2009 has been approved by CEN as a EN ISO 1890:2009 without any modification.

INTERNATIONAL ISO
STANDARD 1890
Fourth edition
2009-06-01
Reinforcement yarns — Determination of
twist
Fils de renfort — Détermination de la torsion

Reference number
ISO 1890:2009(E)
©
ISO 2009
ISO 1890:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 1890:2009(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 1890 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and
reinforcement fibres.
This fourth edition cancels and replaces the third edition (ISO 1890:1997), of which it constitutes a minor
revision. The main changes are as follows:
⎯ the scope has been broadened to include all reinforcement-fibre yarns;
⎯ the normative references have been updated;
⎯ the reference to ISO 1886 which was in the first footnote on page 3 has been removed (ISO 1886 has
been withdrawn without replacement).

INTERNATIONAL STANDARD ISO 1890:2009(E)

Reinforcement yarns — Determination of twist
1 Scope
This International Standard specifies a method for the determination of twist in yarns made from textile glass,
carbon, aramid or any other reinforcement fibres.
The method applies to single yarns (one twist) and to folded or cabled yarns (two or more twists). For folded
and cabled yarns, the method is generally applied only to the final twist step.
This International Standard is applicable to package-wound yarns. If the measurement is carried out on yarns
taken from a beam (or warp) or from a fabric, the result is of an indicative nature only.
The method is not applicable to products made from staple fibres.
2 Normative references
T
...