EN ISO 2078:2022

SLOVENSKI STANDARD
01-maj-2022
Nadomešča:
SIST EN ISO 2078:1999
SIST EN ISO 2078:1999/A1:2016
Steklena vlakna - Preja - Označevanje (ISO 2078:2022)
Textile glass - Yarns - Designation (ISO 2078:2022)
Textilglas - Garne - Bezeichnung (ISO 2078:2022)
Verre textile - Fils - Désignation (ISO 2078:2022)
Ta slovenski standard je istoveten z: EN ISO 2078:2022
ICS:
59.100.10 Materiali iz steklenih vlaken Textile glass materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 2078
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2022
EUROPÄISCHE NORM
ICS 59.100.10 Supersedes EN ISO 2078:1994, EN ISO
2078:1994/A1:2015
English Version
Textile glass - Yarns - Designation (ISO 2078:2022)
Verre textile - Fils - Désignation (ISO 2078:2022) Textilglas - Garne - Bezeichnung (ISO 2078:2022)
This European Standard was approved by CEN on 4 January 2022.

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-CENELEC 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-CENELEC 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2078:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 2078:2022) 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 September 2022, and conflicting national standards
shall be withdrawn at the latest by September 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 2078:1994.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 2078:2022 has been approved by CEN as EN ISO 2078:2022 without any modification.

INTERNATIONAL ISO
STANDARD 2078
Sixth edition
2022-03
Textile glass — Yarns — Designation
Verre textile — Fils — Désignation
Reference number
ISO 2078:2022(E)
ISO 2078:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 2078:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Designation of a yarn . 1
4.1 Elements of the designation . 1
4.1.1 General . 1
4.1.2 Glass used . 1
4.1.3 Type of yarn . 2
4.1.4 Nominal diameter of fibre . 2
4.1.5 Linear density, direction and amount of twist and number of components . 2
4.1.6 Manufacturer's code . 3
4.2 Designation of different types of textile glass yarn . 3
4.2.1 Strands . 3
4.2.2 Slivers . 3
4.2.3 Single yarns . 3
4.2.4 Folded (plied) (doubled) yarns . 4
4.2.5 Cabled yarns . 5
4.2.6 Multiple wound yarns . 5
4.2.7 Rovings. 6
4.2.8 Chopped strands . . 6
iii
ISO 2078:2022(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,
Composites and reinforcement fibres, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This sixth edition cancels and replaces the fifth edition (ISO 2078:1993), which has been technically
revised. It also incorporates the Amendment ISO 2078:1993/Amd.1:2015. The main changes are as
follows:
— three type of glass used in Table 1 have been added;
— one type of yarn in 4.1.2 has been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 2078:2022(E)
Textile glass — Yarns — Designation
1 Scope
This document specifies a system of designating textile glass yarns (including single, multiple-wound,
folded (plied), cabled and textured yarns, strands, slivers and rovings) based on their linear density
expressed in the tex system.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 472, Plastics — Vocabulary
ISO 1139, Textiles — Designation of yarns
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2 and ISO 472 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Designation of a yarn
4.1 Elements of the designation
4.1.1 General
This document shall be in accordance with the rules of the single-to-fold designation given in ISO 1139
to these textile glass products.
According to the specification given in ISO 1139, the designation of a yarn (single yarn, strand, sliver,
roving) is a condensed technical description containing the following elements.
4.1.2 Glass used
One or several letters, to specify the glass used by the manufacturer (see Table 1).
ISO 2078:2022(E)
Table 1 — Type of glass
Type General indications
E Composition with electrical properties, strength and durability suitable for most applications
D Composition with a low dielectric constant
High alkali content composition typically with lower electrical resistivity, strength and
A
durability than E-glass
C Composition resistant to corrosion by most acids
Composition in the system SiO -Al O -MgO with high tensile strength and high elastic
2 2 3
S
modulus
R Composition in the system SiO -Al O -MgO-
...