EN ISO 3035:2011

SLOVENSKI STANDARD
01-maj-2012
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SIST EN 23035:2000
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Corrugated fibreboard - Determination of flat crush resistance (ISO 3035:2011)
Wellpappe - Bestimmung des Flachstauchwiderstandes (ISO 3035:2011)
Carton ondulé - Détermination de la résistance à la compression à plat (ISO 3035:2011)
Ta slovenski standard je istoveten z: EN ISO 3035:2011
ICS:
85.060 Papir, karton in lepenka Paper and board
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 3035
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2011
ICS 85.060 Supersedes EN 23035:1994
English Version
Corrugated fibreboard - Determination of flat crush resistance
(ISO 3035:2011)
Carton ondulé - Détermination de la résistance à la Wellpappe - Bestimmung des Flachstauchwiderstandes
compression à plat (ISO 3035:2011) (ISO 3035:2011)
This European Standard was approved by CEN on 31 October 2011.

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, 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
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3035:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 3035:2011) 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 May 2012, and conflicting national standards shall be withdrawn at the
latest by May 2012.
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.
This document supersedes EN 23035:1994.
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.
Endorsement notice
The text of ISO 3035:2011 has been approved by CEN as a EN ISO 3035:2011 without any modification.

INTERNATIONAL ISO
STANDARD 3035
Third edition
2011-11-01
Corrugated fibreboard — Determination
of flat crush resistance
Carton ondulé — Détermination de la résistance à la compression à plat
Reference number
ISO 3035:2011(E)
©
ISO 2011
ISO 3035:2011(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing 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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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
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Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 3035:2011(E)
Contents Page
Foreword . v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Sampling . 2
7 Conditioning . 2
8 Preparation of test pieces . 2
9 Procedure . 2
10 Expression of results . 4
11 Test report . 4
Annex A (informative) Precision . 6
Bibliography . 8
ISO 3035:2011(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 3035 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test
methods and quality specifications for paper and board.
This third edition cancels and replaces the second edition (ISO 3035:1982), which has been technically revised.
In this revision, the instrument is clarified according to ISO 13820, relevant terms are defined, a precision
statement is added, and other minor text corrections have been made.
iv © ISO 2011 – All rights reserved

ISO 3035:2011(E)
Introduction
Fibreboard shipping containers can be subjected to compressive forces in the thickness direction as part of the
manufacturing process, as well as during shipment or storage. These forces can compress the flute structure
and reduce the structural integrity (stacking strength) of the corrugated material. Resistance to this type of
crushing is an important measure of the performance characteristics of the container.
INTERNATIONAL STANDARD ISO 3035:2011(E)
Corrugated fibreboard — Determination of flat crush resistance
1 Scope
This International Standard specifies a method for the determination of the flat crush resistance of corrugated
fibreboard used in the manufacture of shipping containers.
This International Standard is applicable to single-faced and single-wall (double-faced) corrugated fibreboard.
This International Standard is not applicable to double-wall (double-double-faced) corrugated fibreboard and to
microflute corrugated fibreboard, since the end-point of the test is not clearly defined or observable.
2 Normative references
The following referenced documents are indispensable for the application 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 13820, Paper, board and corrugated fibreboard — Description and calibration of compression-testing
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
flat crush
maximum crushing force, applied perpendicular to the surface of the fluting structure, sustained before
complete collapse of the structure
3.2
collapse
point where the sidewalls of the flutes are no longer able to support load because they have suffered
compression damage
NOTE At this point, the fluting profile appears similar to that of a mushroom (see Figure 2).
3.3
flat crush resistance
flat crush divided by the area of the test piece under the condition of test
NOTE The flat crush resistance is expressed in kilopascals.
4 Principle
A test piece of corrugated fibreboard is subjected to an increasing force applied perpendicularly to the surface
by a compression tester having two flat and parallel platens, until the fluting collapses.
The maximum force sustained by the test piece is divided by the test piece area.
ISO 3035:2011(E)
5 Apparatus
5.1 Flat crush tester, a motor-driven, platen-type compression testing machine in accordance with
ISO 13820, and also calibrated in accordance with ISO 13820.
NOTE The results can be significantly lower when a beam-deflection compression tester is used in comparison with
testing using a platen-type compression tester, particularly in the case where flutes might lean due to lateral movement. In
fixed platen equipment, the platens are restrained against horizontal movement with the sample faces, leading to possible
differences in the failure dynamics picked up by the crush tester.
5.2 Cutting instrument, with a circularly guided knife to cut test pieces with the cut edges clean
and perpendicular to the facings of the corrugated fibreboard. Commonly used test piece areas include
2 2 2
5 000 mm (79,8 mm ± 0,5 mm in diameter), 6 450 mm (90,6 mm ± 0,5 mm in diameter) and 10 000 mm
(112,8 mm ± 0,5 mm in diameter). When the flat crush resistance is expected to exceed the capacity of the crush
2 2
tester on a 5 000 mm sample, a smaller test piece area (commonly 3 220 mm , 64,0 mm ± 0,5 mm in diameter)
may be used.
Test pieces of other uniform shapes may be used, as long as the test area specifications are complied with,
crushing of the edges is avoided when the samples are cut, and fractional flute counts are avoided.
6 Sampling
Sampling shall be carried out in accordance with ISO 186. If the test specimens are to be taken from corrugated
shipping containers, they should be taken from areas away from score lines, joints and closures, but may
include printed areas that reflect the overall state of the samples.
If the tests are made on another type of sample, make sure that the test specimens taken are representative
of the sample received.
7 Conditioning
The sample shall be conditioned in accordance with ISO 187.
8 Preparation of test pieces
Using the cutting instrument (5.2), in the same standard atmospher
...