prEN ISO 12625-4

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)

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'absorption d'énergie à la rupture par traction (ISO/DIS 12625-4:2021)

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)

General Information

• Status: Not Published
• ICS: 85.080.20 - Tissue paper
• Technical Committee: CEN/TC 172 - Pulp, paper and board
• Drafting Committee: CEN/TC 172/WG 8 - Test methods for soft tissue papers
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 03-Mar-2022
• Completion Date: 03-Mar-2022
• Ref Project: oSIST prEN ISO 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)

RELATIONS

• Revised: EN ISO 12625-4:2016 - Tissue paper and tissue products - Part 4: Determination of tensile strength, stretch at maximum force and tensile energy absorption (ISO 12625-4:2016)
• Effective Date: 15-Jan-2020

Standards Content (sample)

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.

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oSIST prEN ISO 12625-4:2021
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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
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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

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ii © ISO 2021 – All rights reserved
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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
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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

...