oSIST prEN ISO 12625-5:2023

SLOVENSKI STANDARD
oSIST prEN ISO 12625-5:2023
01-april-2023
Nadomešča:
SIST EN ISO 12625-5:2017
Tissue papir in proizvodi iz tissue papirja - 5. del: Ugotavljanje mokre natezne
trdnosti (ISO/DIS 12625-5:2023)
Tissue paper and tissue products - Part 5: Determination of wet tensile strength (ISO/DIS
12625-5:2023)
Tissue-Papier und Tissue-Produkte - Teil 5: Bestimmung der breitenbezogenen
Nassbruchkraft (ISO/DIS 12625-5:2023)
Papier tissue et produits tissue - Partie 5: Détermination de la résistance à la rupture par
traction à l'état humide (ISO/DIS 12625-5:2023)
Ta slovenski standard je istoveten z: prEN ISO 12625-5
ICS:
85.080.20 Tissue papir Tissue paper
oSIST prEN ISO 12625-5:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 12625-5:2023

---------------------- Page: 2 ----------------------
oSIST prEN ISO 12625-5:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12625-5
ISO/TC 6/SC 2 Secretariat: SIS
Voting begins on: Voting terminates on:
2023-01-24 2023-04-18
Tissue paper and tissue products —
Part 5:
Determination of wet tensile strength
Papier tissue et produits tissue —
Partie 5: Détermination de la résistance à la rupture par traction à l'état humide
ICS: 85.080.20
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
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 12625-5:2023(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 2023

---------------------- Page: 3 ----------------------
oSIST prEN ISO 12625-5:2023
ISO/DIS 12625-5:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 12625-5
ISO/TC 6/SC 2 Secretariat: SIS
Voting begins on: Voting terminates on:

Tissue paper and tissue products —
Part 5:
Determination of wet tensile strength
Papier tissue et produits tissue —
Partie 5: Détermination de la résistance à la rupture par traction à l'état humide
ICS: 85.080.20
This document is circulated as received from the committee secretariat.
COPYRIGHT PROTECTED DOCUMENT
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: +41 22 749 01 11
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: copyright@iso.org
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 12625-5:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
  © ISO 2023 – All rights reserved
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

---------------------- Page: 4 ----------------------
oSIST prEN ISO 12625-5:2023
ISO/DIS 12625-5:2022(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 Vertical tensile-strength-testing apparatus . 2
5.1.1 Tensile-strength-testing apparatus . 2
5.1.2 Tensile-testing apparatus clamps . 2
5.1.3 Finch Cup soaking device. 3
5.2 Horizontal tensile-strength-testing apparatus . 4
5.2.1 Tensile-strength-testing apparatus . 4
5.2.2 Tensile-testing apparatus clamps . 4
5.2.3 Soaking device . 5
5.3 Cutting device . 5
6 Conditioning . 5
7 Preparation . 5
7.1 General . 5
7.2 Accelerated ageing (curing) . 5
7.3 Dimensions . 6
7.3.1 Vertical testing apparatus . 6
7.3.2 Horizontal testing apparatus . 6
7.4 Number of test pieces . 6
8 Procedure .6
8.1 Calibration and adjustment of the testing apparatus . 6
8.2 Vertical test method . 7
8.2.1 Mounting the Finch Cup soaking device . 7
8.2.2 Measurement . 7
8.3 Horizontal test method . 8
8.3.1 Measurement . 8
9 Calculation . 9
9.1 General . 9
9.2 Wet tensile strength . 10
9.3 Wet tensile strength retention . 10
10 Test report .10
Annex A (informative) Precision .12
Bibliography .16
iii
© ISO 2022 – All rights reserved

---------------------- Page: 5 ----------------------
oSIST prEN ISO 12625-5:2023
ISO/DIS 12625-5:2022(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 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 the European Committee for Standardization (CEN) Technical
Committee CEN/TC 172, Pulp, paper and board, in collaboration with ISO Technical Committee TC 6,
Paper, board and pulps, Subcommittee SC 2, Test methods and quality specifications for 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 12625-5:2016), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— Updated force measurement requirements (5.1.1 and 5.2.1) and added clarification to 7.2.1
(“accelerated” and “rapid” have the same meaning in this standard)
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

---------------------- Page: 6 ----------------------
oSIST prEN ISO 12625-5:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 12625-5:2022(E)
Tissue paper and tissue products —
Part 5:
Determination of wet tensile strength
1 Scope
This document specifies a test method for the determination of the wet tensile strength of tissue paper
and tissue products after soaking with water, using a tensile-strength-testing apparatus operating with
a constant rate of elongation.
Currently, two types of tensile-strength-testing apparatus are commercially available, one where
the test piece is positioned vertically and, for the other, horizontally. This document applies for both.
For vertical tensile-strength-testing apparatus, a device which is held in the lower grip of the tensile-
strength-testing apparatus, called a Finch Cup, is used to achieve the wetting. For horizontal tensile-
strength-testing apparatus, the soaking device is placed between the clamps.
[6]
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
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
wet tensile strength
maximum tensile force per unit width that a test piece soaked with water will withstand before
breaking
Note 1 to entry: The wet tensile strength is expressed in newtons per metre (N/m).
1
© ISO 2022 – All rights reserved

---------------------- Page: 7 ----------------------
oSIST prEN ISO 12625-5:2023
ISO/DIS 12625-5:2022(E)
3.2
wet-tensile-strength retention
ratio, expressed as a percentage, of the tensile strength of the wet test piece to the tensile strength of a
different test piece from the same sample in the dry, conditioned state
Note 1 to entry: According to ISO 187.
4 Principle
A test piece of tissue paper or tissue product of given dimensions, soaked in water for a given period of
time under specified conditions, is stretched (elongated) to break at a constant rate of elongation, using
a tensile-strength-testing apparatus that measures and records the tensile force as a function of the
elongation of the test piece.
The test can be carried out by a vertical or a horizontal tensile-strength-testing apparatus.
In order to wet the test pieces for a vertical tensile-strength-testing apparatus, a device called a Finch
Cup, which is held to the lower clamp, is used. For a horizontal tensile-strength-testing apparatus, a
soaking cup is inserted between the clamps.
From the wet tensile strength and the tensile strength of the same sample in the dry conditioned state,
the wet-tensile-strength retention can be calculated.
Precision data are available in Annex A.
5 Apparatus
5.1 Vertical tensile-strength-testing apparatus
5.1.1 Tensile-strength-testing apparatus
The tensile-strength-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 ± 2) mm/min, and recording the tensile force as a function of elongation on a strip chart recorder or
any equivalent device.
The force-measuring system (normally a load cell) shall measure loads with an accuracy of ±1 % of
the reading or ±0,025 N, whichever is greater, and shall be calibrated and verified to conform to the
requirements of ISO 7500-1.
5.1.2 Tensile-testing apparatus clamps
The tensile-strength-testing apparatus (5.1.1) shall have an upper clamp with a minimum of 50 mm
width, for holding both ends of the test piece firmly and without slippage. To avoid damaging the test
pieces, the clamp surfaces that touch the pieces should be smooth and have rounded edges, i.e. free
from burrs. The lower clamp shall be designed to grip the Finch Cup soaking device (5.1.3) firmly. The
clamps shall have means for adjusting the clamping force.
During the test, the upper clamping line and the Finch Cup soaking device (5.1.3) rod shall be parallel
to each other. They shall also be perpendicular to the direction of the applied tensile force and to the
length axis of the test piece.
The distance between A and B is the total span length and shall be (100 ± 1) mm. The distance between
A and B divided by two is the test span length and shall be (50 ± 1) mm.
2
  © ISO 2022 – All rights reserved

---------------------- Page: 8 ----------------------
oSIST prEN ISO 12625-5:2023
ISO/DIS 12625-5:2022(E)
Dimensions in millimetres
Key
A clamping line on one end of the test piece
B clamping line on the other end of the test piece
Figure 1 — Positioning of a test piece
5.1.3 Finch Cup soaking device
A Finch Cup soaking device (see Figure 2) consists of a support system that holds a horizontal cylindrical
rod of (5,0 ± 0,1) mm diameter, and approximately 60 mm length, and a water container.
The water container shall be constructed such that it can be moved vertically and locked in a raised
position. In the locked raised position, the water in the container shall completely surround the
cylindrical rod which is thereby immersed in the liquid to a depth of (20 ± 1) mm, as indicated in
Figure 2.
Projecting downwards, from the bottom of the device, is a rigid metal tongue by means of which the
device can be held in the lower clamp of the tensile-strength-testing apparatus.
3
© ISO 2022 – All rights reserved

---------------------- Page: 9 ----------------------
oSIST prEN ISO 12625-5:2023
ISO/DIS 12625-5:2022(E)
Dimensions in millimetres
Key
1 liquid level mark
2 positioning groove
3 rod, d (5,0 ± 0,1) mm
4 water container (movable)
5 tongue
Figure 2 — Finch Cup soaking device (example)
5.2 Horizontal tensile-strength-testing apparatus
5.2.1 Tensile-strength-testing apparatus
The tensile-strength-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 ± 2) mm/min, and recording the tensile force as a function of elongation on a strip chart or any
equivalent device.
The force-measuring system (normally a load cell) shall measure loads with an accuracy of ±1 % of
the reading or ±0,025 N, whichever is greater, and shall be calibrated and verified to conform to the
requirements of ISO 7500-1.
5.2.2 Tensile-testing apparatus clamps
The tensile-strength-testing apparatus shall have two clamps for holding the test piece. Each clamp
shall be designed to grip the test piece firmly along a straight li
...