SIST EN ISO 12625-4:2022
(Main)Tissue paper and tissue products - Part 4: Determination of tensile strength, stretch at maximum force and tensile energy absorption (ISO 12625-4:2022)
Tissue paper and tissue products - Part 4: Determination of tensile strength, stretch at maximum force and tensile energy absorption (ISO 12625-4:2022)
This document specifies a test method for the determination of the tensile strength, stretch at
maximum force and tensile energy absorption of tissue paper and tissue products. It uses a tensiletesting apparatus operating with a constant rate of elongation.
It also specifies the method of calculating the tensile index and the tensile energy absorption index.
Tissue-Papier und Tissue-Produkte - Teil 4: Bestimmung der breitenbezogenen Bruchkraft, der Dehnung bei maximaler Kraft und des Arbeitsaufnahmevermögens (ISO 12625-4:2021)
Dieses Dokument legt ein Prüfverfahren zur Bestimmung der breitenbezogenen Bruchkraft, der Dehnung bei maximaler Kraft und des Arbeitsaufnahmevermögens von Tissue-Papier und Tissue-Produkten fest. Hierfür wird ein Zugprüfgerät eingesetzt, das mit konstanter Dehnungsgeschwindigkeit arbeitet.
Es wird zudem ein Verfahren zur Berechnung des Bruchkraftindexes und des Arbeitsaufnahmevermögen-Indexes festgelegt.
In Fällen, in denen Unreinheiten und Verunreinigungen zu bestimmen sind, erfolgt deren Erkennung in Tissue-Papier und Tissue-Produkten nach ISO 15755 [1].
Papier tissue et produits tissue - Partie 4: Détermination de la résistance à la rupture par traction, de l’allongement à la force maximale et de l’énergie absorbée à la rupture par traction (ISO 12625-4:2022)
Le présent document spécifie une méthode d’essai pour la détermination de la résistance à la rupture par traction, de l’allongement à la force maximale et de l’énergie absorbée à la rupture par traction du papier tissue et des produits tissue. Il utilise un appareil d’essai de traction fonctionnant à un gradient d’allongement constant.
Il spécifie également la méthode de calcul de l’indice de rupture par traction et de l’indice d’énergie absorbée à la rupture par traction.
Tissue papir in proizvodi iz tissue papirja - 4. del: Ugotavljanje natezne trdnosti, raztezanja pri največji sili in absorpcijske natezne energije (ISO 12625-4:2022)
Ta dokument določa preskusno metodo za ugotavljanje natezne trdnosti, raztezanja pri največji sili in absorpcijske natezne energije tissue papirja in proizvodov iz tissue papirja. Uporablja napravo za preskušanje natega, ki deluje s stalno hitrostjo raztezanja. Določa tudi način izračuna nateznega indeksa in indeksa absorpcijske natezne energije.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12625-4:2022
01-november-2022
Nadomešča:
SIST EN ISO 12625-4:2017
Tissue papir in proizvodi iz tissue papirja - 4. del: Ugotavljanje natezne trdnosti,
raztezanja pri največji sili in absorpcijske natezne energije (ISO 12625-4:2022)
Tissue paper and tissue products - Part 4: Determination of tensile strength, stretch at
maximum force and tensile energy absorption (ISO 12625-4:2022)
Tissue-Papier und Tissue-Produkte - Teil 4: Bestimmung der breitenbezogenen
Bruchkraft, der Dehnung bei maximaler Kraft und des Arbeitsaufnahmevermögens (ISO
12625-4:2021)
Papier tissue et produits tissue - Partie 4: Détermination de la résistance à la rupture par
traction, de l’allongement à la force maximale et de l’énergie absorbée à la rupture par
traction (ISO 12625-4:2022)
Ta slovenski standard je istoveten z: EN ISO 12625-4:2022
ICS:
85.080.20 Tissue papir Tissue paper
SIST EN ISO 12625-4:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12625-4:2022
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SIST EN ISO 12625-4:2022
EN ISO 12625-4
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 85.080.20 Supersedes EN ISO 12625-4:2016
English Version
Tissue paper and tissue products - Part 4: Determination
of tensile strength, stretch at maximum force and tensile
energy absorption (ISO 12625-4:2022)
Papier tissue et produits tissue - Partie 4: Tissue-Papier und Tissue-Produkte - Teil 4:
Détermination de la résistance à la rupture par Bestimmung der breitenbezogenen Bruchkraft, der
traction, de l'allongement à la force maximale et de Dehnung bei maximaler Kraft und des
l'énergie absorbée à la rupture par traction (ISO Arbeitsaufnahmevermögens (ISO 12625-4:2021)
12625-4:2022)
This European Standard was approved by CEN on 9 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 12625-4:2022 E
worldwide for CEN national Members.
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SIST EN ISO 12625-4:2022
EN ISO 12625-4:2022 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 12625-4:2022
EN ISO 12625-4:2022 (E)
European foreword
This document (EN ISO 12625-4:2022) 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 12625-4:2016.
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 12625-4:2022 has been approved by CEN as EN ISO 12625-4:2022 without any
modification.
3
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SIST EN ISO 12625-4:2022
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SIST EN ISO 12625-4:2022
INTERNATIONAL ISO
STANDARD 12625-4
Third edition
2022-08
Tissue paper and tissue products —
Part 4:
Determination of tensile strength,
stretch at maximum force and tensile
energy absorption
Papier tissue et produits tissue —
Partie 4: Détermination de la résistance à la rupture par traction,
de l’allongement à la force maximale et de l’énergie absorbée à la
rupture par traction
Reference number
ISO 12625-4:2022(E)
© ISO 2022
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SIST EN ISO 12625-4:2022
ISO 12625-4:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© 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 2022 – All rights reserved
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SIST EN ISO 12625-4:2022
ISO 12625-4:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Tensile-testing apparatus . 2
5.1.1 General . 2
5.1.2 Means for measuring the area of the force-elongation curve . 3
5.1.3 Clamps . 3
5.2 Cutting device . 3
6 Conditioning . 3
7 Preparation of test pieces .3
7.1 General . 3
7.2 Dimensions . 4
7.3 Number of test pieces . 4
8 Procedure .4
9 Calculation . 5
9.1 General . 5
9.2 Tensile strength . 5
9.3 Tensile index . 5
9.4 Stretch at maximum force . 5
9.5 Tensile energy absorption . 6
9.6 Tensile energy absorption index . . 6
10 Test report . 6
Annex A (informative) Precision . 8
Annex B (informative) Tensile modulus determination .10
Bibliography .12
iii
© ISO 2022 – All rights reserved
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SIST EN ISO 12625-4:2022
ISO 12625-4:2022(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, Subcommittee
SC 2, Test methods and quality specifications for paper and board, 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 third edition cancels and replaces the second edition (ISO 12625-4:2016), which has been
technically revised.
The main changes are as follows:
— inclusion of Annex B, which describes a method of determining the tensile modulus.
A list of all parts in the ISO 12625 series can be found on the ISO website.
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 2022 – All rights reserved
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SIST EN ISO 12625-4:2022
INTERNATIONAL STANDARD ISO 12625-4:2022(E)
Tissue paper and tissue products —
Part 4:
Determination of tensile strength, stretch at maximum
force and tensile energy absorption
1 Scope
This document specifies a test method for the determination of the tensile strength, stretch at
maximum force and tensile energy absorption of tissue paper and tissue products. It uses a tensile-
testing apparatus operating with a constant rate of elongation.
It also specifies the method of calculating the tensile index and the tensile energy absorption index.
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 186, Paper and board — Sampling to determine average quality
ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for
monitoring the atmosphere and conditioning of samples
ISO 1924-2, Paper and board — Determination of tensile properties — Part 2: Constant rate of elongation
method (20 mm/min)
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 12625-1, Tissue paper and tissue products — Part 1: Vocabulary
ISO 12625-6, Tissue paper and tissue products — Part 6: Determination of grammage
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12625-1 and the following
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/
3.1
tensile strength
maximum tensile force per unit width that a test piece will withstand before breaking
3.2
tensile index
I
tensile strength (3.1) divided by grammage
1
© ISO 2022 – All rights reserved
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SIST EN ISO 12625-4:2022
ISO 12625-4:2022(E)
3.3
stretch at maximum force
ratio of the elongation of a test piece, over its initial length, at the moment when the maximum tensile
force is reached during a tensile test
Note 1 to entry: Stretch at maximum force is expressed as a percentage of the initial test span length.
Note 2 to entry: This procedure uses slack correction and does not start to measure elongation until a force of
(0,25 ± 0,05) N.
3.4
tensile energy absorption
TEA
amount of energy absorbed per unit surface area of a test piece while being stretched under application
of tensile force, until the onset of break (the m
...
SLOVENSKI STANDARD
oSIST prEN ISO 12625-4:2021
01-september-2021
Tissue papir in proizvodi iz tissue papirja - 4. del: Ugotavljanje natezne jakosti,
raztezanja pri največji sili in absorpcijske natezne energije (ISO/DIS 12625-4:2021)
Tissue paper and tissue products - Part 4: Determination of tensile strength, stretch at
maximum force and tensile energy absorption (ISO/DIS 12625-4:2021)
Tissue-Papier und Tissue-Produkte - Teil 4: Bestimmung der breitenbezogenen
Bruchkraft, der Dehnung bei maximaler Kraft und des Arbeitsaufnahmevermögens
(ISO/DIS 12625-4:2021)
Papier tissue et produits tissue - Partie 4: Détermination de la résistance à la rupture par
traction, de l'allongement à la force maximale et de l'absorption d'énergie à la rupture par
traction (ISO/DIS 12625-4:2021)
Ta slovenski standard je istoveten z: prEN ISO 12625-4
ICS:
85.080.20 Tissue papir Tissue paper
oSIST prEN ISO 12625-4:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 12625-4:2021
---------------------- Page: 2 ----------------------
oSIST prEN ISO 12625-4:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12625-4
ISO/TC 6/SC 2 Secretariat: SIS
Voting begins on: Voting terminates on:
2021-06-01 2021-08-24
Tissue paper and tissue products —
Part 4:
Determination of tensile strength, stretch at maximum
force and tensile energy absorption
Papier tissue et produits tissue —
Partie 4: Détermination de la résistance à la rupture par traction, de l'allongement à la force maximale et
de l'absorption d'énergie à la rupture par traction
ICS: 85.080.20
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 12625-4:2021(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
---------------------- Page: 3 ----------------------
oSIST prEN ISO 12625-4:2021
ISO/DIS 12625-4:2021(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
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 2021 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 12625-4:2021
ISO/DIS 12625-4:2021(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Tensile-testing apparatus . 2
5.1.1 General. 2
5.1.2 Means for measuring the area of the force-elongation curve . 3
5.1.3 Clamps . 3
5.2 Cutting device . 3
6 Conditioning . 3
7 Preparation of test pieces . 3
7.1 General . 3
7.2 Dimensions . 4
7.3 Number of test pieces . 4
8 Procedure. 4
9 Calculation . 4
9.1 General . 4
9.2 Tensile strength . 5
9.3 Tensile index . 5
9.4 Stretch at maximum force . 5
9.5 Tensile energy absorption . 6
9.6 Tensile energy absorption index . 6
10 Test report . 6
Annex A (informative) Precision . 8
Annex B (normative) Tensile modulus determination .10
Bibliography .12
© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 12625-4:2021
ISO/DIS 12625-4:2021(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 on 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 the following URL: www .iso .org/ iso/ foreword .html.
This document was prepared by ISO Technical Committee TC 6, Paper, board and pulps, Subcommittee
SC 2, Test methods and quality specifications for paper and board in collaboration with the European
Committee 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 third edition cancels and replaces the second edition (ISO 12625-4:2016), which has been
technically revised with the following changes:
— inclusion of a normative Annex B describing a method of determining the tensile modulus
iv © ISO 2021 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 12625-4:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 12625-4:2021(E)
Tissue paper and tissue products —
Part 4:
Determination of tensile strength, stretch at maximum
force and tensile energy absorption
1 Scope
This document specifies a test method for the determination of the tensile strength, stretch at
maximum force and tensile energy absorption of tissue paper and tissue products. It uses a tensile-
testing apparatus operating with a constant rate of elongation.
It also specifies the method of calculating the tensile index and the tensile energy absorption index.
[1]
In cases where impurities and contraries have to be determined, ISO 15755 applies for these
detections in tissue paper and tissue products.
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 186, Paper and board — Sampling to determine average quality
ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for
monitoring the atmosphere and conditioning of samples
ISO 1924-2, Paper and board — Determination of tensile properties — Part 2: Constant rate of elongation
method (20 mm/min)
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 12625-6, Tissue paper and tissue products — Part 6: Determination of grammage
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12625-1 and the following apply.
ISO and IEC maintain terminological 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/
3.1
tensile strength
maximum tensile force per unit width that a test piece will withstand before breaking in a tensile test
3.2
tensile index
tensile strength (3.1) divided by grammage
© ISO 2021 – All rights reserved 1
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oSIST prEN ISO 12625-4:2021
ISO/DIS 12625-4:2021(E)
3.3
stretch at maximum force
ratio of the elongation of a test piece, over its initial length, at the moment when the maximum tensile
force is reached during a tensile test
Note 1 to entry: Stretch at maximum force is expressed as a percentage of the initial test span length.
Note 2 to entry: This procedure uses slack correction and does not start to measure elongation until a force
of 5 mN/m.
3.4
tensile energy absorption
TEA
amount of energy absorbed per unit surface area of a test piece while being stretched, at the moment
when the maximum tensile force is reached during a tensile test
[SOURCE: ISO 12625-1:2011, 4.59]
3.5
tensile energy absorption index
tensile energy absorption (3.4) divided by grammage
[SOURCE: ISO 1924-2:2008, 3.7]
4 Principle
A test piece of tissue paper or tissue product, of given dimensions, is stretched to break at a constant
rate of elongation using a tensile-testing apparatus that measures and records the tensile force as a
function of the elongation of the test piece.
From the recorded data, the tensile strength, the corresponding stretch at maximum force and the
tensile energy absorption can be calculated.
The test can be carried out by a vertical or a horizontal tensile strength tester. Precision data are
available in Annex A.
5 Apparatus
5.1 Tensile-testing apparatus
5.1.1 General
The tensile-testing apparatus shall be in accordance with ISO 1924-2. It is capable of stretching a test
piece of tissue paper or tissue product of given dimensions, at a constant rate of elongation of 50 %
of the initial test span length per minute (%/min); i.e. 50 mm/min for a 100 mm test span length and
25 mm/min for a 50 mm test span length, and recording the tensile force as a function of elongation on
a strip chart recorder or any equivalent device.
The elongation shall be recorded to an accuracy of ± 0,1 mm. The measurement of the elongation shall
start at a tension of (5 ± 1) N/m.
The force-measuring system shall measure loads with an accuracy of ± 1 % of the reading or ± 0,01 N,
whichever is greater, and shall be calibrated and verified to conform to the requir
...
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