EN ISO 12625-12:2010

SLOVENSKI STANDARD
01-marec-2010
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Tissue paper and tissue products - Part 12: Determination of tensile strength of
perforated lines - Calculation of perforation efficiency (ISO 12625-12:2010)
Tissue-Papier und Tissue-Produkte - Teil 12: Bestimmung der breitenbezogenen
Bruchkraft an Perforationen - Berechnung der Perforations-Effizienz (ISO 12625-
12:2010)
Papier tissue et produits tissues - Partie 12: Détermination de la résistance à la rupture
par traction de perforations - Calcul de l'efficacité des perforations (ISO 12625-12:2010)
Ta slovenski standard je istoveten z: EN ISO 12625-12:2010
ICS:
85.080.20 Tissue papir Tissue paper
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 12625-12
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2010
ICS 85.080.20
English Version
Tissue paper and tissue products - Part 12: Determination of
tensile strength of perforated lines - Calculation of perforation
efficiency (ISO 12625-12:2010)
Papier tissue et produits tissues - Partie 12: Détermination Tissue-Papier und Tissue-Produkte - Teil 12: Bestimmung
de la résistance à la rupture par traction des lignes de der breitenbezogenen Bruchkraft an Perforationen -
prédécoupe - Calcul de l'efficacité des perforations (ISO Berechnung der Perforations-Effizienz (ISO 12625-
12625-12:2010) 12:2010)
This European Standard was approved by CEN on 9 January 2010.

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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12625-12:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 12625-12:2010) has been prepared by Technical Committee CEN/TC 172 “Pulp,
paper and board”, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 6
“Paper, board and pulps”.
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 July 2010, and conflicting national standards shall be withdrawn at the
latest by July 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

INTERNATIONAL ISO
STANDARD 12625-12
First edition
2010-01-15
Tissue paper and tissue products —
Part 12:
Determination of tensile strength
of perforated lines — Calculation
of perforation efficiency
Papier tissue et produits tissues —
Partie 12: Détermination de la résistance à la rupture par traction
des lignes de prédécoupe — Calcul de l'efficacité des perforations

Reference number
ISO 12625-12:2010(E)
©
ISO 2010
ISO 12625-12:2010(E)
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ii © ISO 2010 – All rights reserved

ISO 12625-12:2010(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
5.1 Tensile-testing apparatus.2
5.2 Tensile-tester clamps.2
5.3 Cutting device.3
6 Sampling.3
7 Conditioning .3
8 Preparation of test pieces.3
8.1 Dimensions .3
8.2 Number of test pieces.4
9 Procedure.4
9.1 General .4
9.2 Non-perforated test pieces.4
9.3 Perforated test pieces.4
10 Calculation .6
10.1 Tensile strength.6
10.2 Calculation of perforation efficiency .6
11 Test report.6
12 Precision.7
12.1 General .7
12.2 Tensile strength of non-perforated and perforated products.8
12.3 Perforation efficiency.9
Annex A (informative) Influence of a pre-cut in the perforation line .10
Annex B (informative) Influence of paper ageing .12
Bibliography.14

ISO 12625-12:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 12625-12 was prepared by the European Committee for Standardization (CEN) Technical Committee
CEN/TC 172, Pulp, paper and board, in collaboration with Technical Committee ISO/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).
ISO 12625 consists of the following parts, under the general title Tissue paper and tissue products:
⎯ Part 1: General principles for the use of terms
⎯ Part 3: Determination of thickness, bulking thickness and apparent bulk density
⎯ Part 4: Determination of tensile strength, stretch at break and tensile energy absorption
⎯ Part 5: Determination of wet tensile strength
⎯ Part 6: Determination of grammage
⎯ Part 7: Determination of optical properties
⎯ Part 8: Water-absorption time and water-absorption capacity, basket-immersion test method
⎯ Part 9: Determination of ball burst strength
⎯ Part 12: Determination of tensile strength of perforated lines — Calculation of perforation efficiency
The following part is under preparation:
⎯ Part 13: Determination of the spectral reflectance factor (brightness) at the wavelength R 457 nm with
and without UV stimulus and opacity

iv © ISO 2010 – All rights reserved

ISO 12625-12:2010(E)
Introduction
Tissue papers such as toilet paper and kitchen towel are often pre-cut. They are used after separation of two
consecutive sheets.
It is important to know the efficiency of the pre-cut perforations.
The perforation strength should be enough to ensure the product cohesion, but not too high, so that sheets
can be easily separated. Depending on the type of tissue product, forces can b
...