EN ISO 5270:2022

SLOVENSKI STANDARD
01-november-2022
Nadomešča:
SIST EN ISO 5270:2012
Vlaknine - Laboratorijski listi - Ugotavljanje fizikalnih lastnosti (ISO 5270:2022)
Pulps - Laboratory sheets - Determination of physical properties (ISO 5270:2022)
Faserstoff - Laborblätter - Bestimmung der physikalischen Eigenschaften (ISO
5270:2022)
Pâtes - Feuilles de laboratoire - Détermination des propriétés physiques (ISO
5270:2022)
Ta slovenski standard je istoveten z: EN ISO 5270:2022
ICS:
85.040 Vlaknine Pulps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5270
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 85.040 Supersedes EN ISO 5270:2012
English Version
Pulps - Laboratory sheets - Determination of physical
properties (ISO 5270:2022)
Pâtes - Feuilles de laboratoire - Détermination des Faserstoff - Laborblätter - Bestimmung der
propriétés physiques (ISO 5270:2022) physikalischen Eigenschaften (ISO 5270:2022)
This European Standard was approved by CEN on 14 July 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, Türkiye 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 5270:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 5270:2022) has been prepared by Technical Committee ISO/TC 6 "Paper, board
and pulps" in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the
secretariat of which is held by DIN.
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 March 2023, and conflicting national standards shall
be withdrawn at the latest by March 2023.
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 5270:2012.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 5270:2022 has been approved by CEN as EN ISO 5270:2022 without any modification.

INTERNATIONAL ISO
STANDARD 5270
Fourth edition
2022-08
Pulps — Laboratory sheets —
Determination of physical properties
Pâtes — Feuilles de laboratoire — Détermination des propriétés
physiques
Reference number
ISO 5270:2022(E)
ISO 5270:2022(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 5270:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Apparatus . 2
6 Trimmed laboratory sheets .2
6.1 Selection of laboratory sheets . 2
6.2 Conditioning of laboratory sheets . 2
6.3 Optical properties . 3
6.4 Determination of grammage, bulking thickness and apparent bulk density . 3
6.5 Preparation of test pieces . 4
7 Procedures for physical properties (low-grammage sheets) . 5
7.1 General . 5
7.2 Tensile properties . 5
7.3 Tear index . 5
7.4 Burst index . 6
7.5 Air permeance . 6
7.6 Folding endurance . 6
8 Procedures for physical properties (high-grammage sheets) . 6
8.1 General . 6
8.2 Bending resistance index . 6
8.3 Flat crush resistance index after laboratory fluting . 7
8.4 Ring crush resistance index. 7
8.5 Short span compression index. 7
8.6 Z-directional tensile strength . 7
9 Test report . 7
Bibliography . 9
iii
ISO 5270:2022(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 6, Paper, board and pulps, in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 172, Pulp, paper
and board, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This fourth edition cancels and replaces the third edition (ISO 5270:2012), which has been technically
revised.
The main changes are as follows:
— 6.2: rewriting of the subclause;
— 6.3: permission to perform optical tests on sheets formed using the Rapid-Köthen method if the
sheets are dried at room temperature;
— 6.4: introduction of a minimum area for grammage determination;
— 7.2 inclusion of the option to report strain at break following determination of tensile properties;
— 7.5: inclusion of the option to determine air permeance using the Oken method.
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
ISO 5270:2022(E)
Introduction
This document provides the determination o
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