oSIST prEN ISO 5270:2021

Pulps - Laboratory sheets - Determination of physical properties (ISO/DIS 5270:2021)

Faserstoff - Laborblätter - Bestimmung der physikalischen Eigenschaften (ISO/DIS 5270:2021)

Pâtes - Feuilles de laboratoire - Détermination des propriétés physiques (ISO/DIS 5270:2021)

Vlaknine - Laboratorijski listi - Ugotavljanje fizikalnih lastnosti (ISO/DIS 5270:2021)

General Information

• Status: Not Published
• Public Enquiry End Date: 07-Nov-2021
• ICS: 85.040 - Pulps
• Technical Committee: VPK - Pulp, paper, board and products
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 29-Sep-2021
• Due Date: 16-Feb-2022
• Ref Project: prEN ISO 5270 - Pulps - Laboratory sheets - Determination of physical properties (ISO/DIS 5270:2021)

RELATIONS

• Revised: SIST EN ISO 5270:2012 - Pulps - Laboratory sheets - Determination of physical properties (ISO 5270:2012)
• Effective Date: 16-Dec-2020

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 5270:2021
01-november-2021

Vlaknine - Laboratorijski listi - Ugotavljanje fizikalnih lastnosti (ISO/DIS 5270:2021)

Pulps - Laboratory sheets - Determination of physical properties (ISO/DIS 5270:2021)

Faserstoff - Laborblätter - Bestimmung der physikalischen Eigenschaften (ISO/DIS
5270:2021)

Pâtes - Feuilles de laboratoire - Détermination des propriétés physiques (ISO/DIS

5270:2021)
Ta slovenski standard je istoveten z: prEN ISO 5270
ICS:
85.040 Vlaknine Pulps
oSIST prEN ISO 5270:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 5270:2021
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oSIST prEN ISO 5270:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 5270.2
ISO/TC 6 Secretariat: SCC
Voting begins on: Voting terminates on:
2021-09-13 2021-11-08
Pulps — Laboratory sheets — Determination of physical
properties
Pâtes — Feuilles de laboratoire — Détermination des propriétés physiques
ICS: 85.040
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 5270.2:2021(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2021
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oSIST prEN ISO 5270:2021
ISO/DIS 5270.2:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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
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Phone: [phone]
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Published in Switzerland
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 5270:2021
ISO/DIS 5270.2:2021(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 .................................................................................................................................................................................................... 6

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 ............................................................................................................................................................... 7

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

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 5270:2021
ISO/DIS 5270.2:2021(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.

This fourth edition cancels and replaces the third edition (ISO 5270:2012), which has been editorially

and technically revised.
The main changes compared to the previous edition are as follows:
• The option to determine air permeance using the Oken method (ISO 5636-6)’
• Rewriting of the section on Conditioning;
• Introduction of a minimum area for grammage determination;

• Permitting optical tests on sheets formed using the Rapid-Köthen method if the sheets are dried at

room temperature;

• Inclusion of the option to report strain at break following determination of tensile properties.

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 2021 – All rights reserved
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oSIST prEN ISO 5270:2021
ISO/DIS 5270.2:2021(E)
Introduction

The International Organization for Standardization (ISO) [and/or] International Electrotechnical

Commission (IEC) draw[s] attention to the fact that it is claimed that compliance with this document

may involve the use of a patent.

ISO [and/or] IEC take[s] no position concerning the evidence, validity and scope of this patent right.

The holder of this patent right has ensured ISO [and/or] IEC that he/she is willing to negotiate licences

under reasonable and non-discriminatory terms and conditions with applicants throughout the world.

In this respect, the statement of the holder of this patent right is registered with ISO [and/or] IEC.

Information may be obtained from the patent database available at www .iso .org/ patents.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights other than those in the patent database. ISO [and/or] IEC shall not be held responsible for

identifying any or all such patent rights.

This document includes the determination of physical properties of both “low grammage” sheets and

“high grammage” sheets, prepared in accordance with ISO 5269-1, ISO 5269-2 or ISO 5269-3. The oven-

dry grammage of the “low grammage” sheets is (60 ± 2) g/m using the conventional sheet former,

as described in ISO 5269-1 and ISO 5269-3, or (75 ± 2) g/m using the Rapid-Köthen sheet former, as

described in ISO 5269-2 and ISO 5269-3. The oven-dry grammage of the “high grammage” sheets is

140 g/m , with a tolerance of 3 % using the conventional and the Rapid Köthen sheet formers, except

for the z-directional tensile strength where the grammage is ≥ 90 g/m .

For determination of physical properties, ISO 5270 refers to the relevant International Standards for

paper and board for the description and calibration of the required equipment, and for the calculation

and reporting of results. This document, however, specifies the procedures for testing laboratory sheets

where the amount of material is limited, compared to testing of paper and board to which the relevant

International Standards referred to are applicable, and for that reason there may be a discrepancy in

the procedures.
© ISO 2021 – All rights reserved v
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oSIST prEN ISO 5270:2021
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oSIST prEN ISO 5270:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 5270.2:2021(E)
Pulps — Laboratory sheets — Determination of physical
properties
1 Scope

This document specifies the relevant International Standards to be used for the determination of

physical properties of laboratory sheets made of all kind of pulps. It is applicable to laboratory sheets

prepared in accordance with ISO 5269-1, ISO 5269-2 or ISO 5269-3.

In this document, it is left to the pulp producer and the pulp user to agree upon which properties are

relevant to be tested. The results are, if applicable, reported in index form.
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 187:1990, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure

for monitoring the atmosphere and conditioning of samples

ISO 534, Paper and board — Determination of thickness, density and specific volume

ISO 536, Paper and board — Determination of grammage

ISO 1924-2, Paper and board — Determination of tensile properties — Part 2: Constant rate of elongation

method (20 mm/min)

ISO 1924-3, Paper and board — Determination of tensile properties — Part 3: Constant rate of elongation

method (100 mm/min)
ISO 1974, Paper — Determination of tearing resistance — Elmendorf method

ISO 2493-1, Paper and board — Determination of bending resistance — Part 1: Constant rate of deflection

ISO 2493-2, Paper and board — Determination of resistance to bending — Part 2: Taber-type tester

ISO 2758, Paper — Determination of bursting strength

ISO 5269-1, Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-

former method

ISO 5269-2, Pulps — Preparation of laboratory sheets for physical testing — Part 2: Rapid-Köthen method

ISO 5269-3, Pulps — Preparation of laboratory sheets for physical testing — Part 3: Conventional and

Rapid-Köthen sheet formers using a closed water system
ISO 5626, Paper — Determination of folding endurance

ISO 5636-3, Paper and board — Determination of air permeance (medium range) — Part 3: Bendtsen

method

ISO 5636-4, Paper and board — Determination of air permeance (medium range) — Part 4: Sheffield

method

ISO 5636-5, Paper and board — Determination of air permeance (medium range) — Part 5: Gurley method

© ISO 2021 – All rights reserved 1
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oSIST prEN ISO 5270:2021
ISO/DIS 5270.2:2021(E)

ISO 5636-6, Paper and board — Determination of air permeance (medium range) — Part 6: Oken method

ISO 7263, Corrugating medium — Determination of the flat crush resistance after laboratory fluting

ISO 9895, Paper and board — Compressive strength — Short-span test

ISO 12192, Paper and board — Determination of compressive strength — Ring crush method

ISO 15754, Paper and board — Determination of z-directional tensile strength

NOTE A separate International Standard, ISO 153610, has been published for pulps describing the

determination of zero-span tensile strength, wet or dry.
3 Terms and definitions
No terms and definitions are listed in this document.
4 Principle

Determination of physical properties of laboratory sheets using the procedure and equipment described

in the relevant International Standards given in Tables 1 and 2. The results are, if applicable, reported

in index form.

NOTE The properties to be measured are jointly determined by the pulp producer and the pulp user.

5 Apparatus

The equipment is specified in the respective International Standards given in Tables 1 and 2 to

which this International Standard refers. The equipment shall be calibrated in accordance with the

instructions in the relevant International Standards given in Tables 1 and 2.
6 Trimmed Laboratory Sheets
6.1 Selection of Laboratory Sheets

Depending on the properties to be tested, determine the number of laboratory sheets required (see

Table 1 and/or Table 2). The specification of the number of test pieces needed for each property defines

the area required for testing and thus the number of sheets.
Each sheet shall be free of visible defects.
6.2 Conditioning of Laboratory Sheets

Condition the laboratory sheets in the standard atmosphere (23 ± 1) °C and (50 ± 2) % relative humidity,

or in the atmosphere allowed in tropical countries, according to ISO 187.

ISO 187 states in its Introduction that “Unless otherwise specified, the equilibrium condition should

be attained by the sorptive process”. For tests in which the hysteresis of the equilibrium moisture

content may lead to errors that are significant, ISO 187 requires the sample to be pre-conditioned

before conditioning (see 7.1) unless it is known that conditioning will result in an equilibrium moisture

content equivalent to that achieved by sorption or the samples have been
...