SIST EN ISO 5270:2000
(Main)Pulps - Laboratory sheets - Determination of physical properties (ISO 5270:1998)
Pulps - Laboratory sheets - Determination of physical properties (ISO 5270:1998)
Halbstoffe - Laborblätter - Bestimmung von physikalischen Eigenschaften (ISO 5270:1998)
Diese Internationale Norm legt Prüfverfahren zur Bestimmung einiger physikalischer Eigenschaften von Laborblättern, hergestellt aus Zellstoff, fest. Sie ist für Laborblätter anzuwenden, die nach ISO 5269-1 oder 5269-2 hergestellt wurden. Sie muß mit den relevanten internationalen Prüfverfahren für Papier in Verbindung gebracht werden, auf die hingewiesen wird. Die in dieser Internationalen Norm festgelegten Prüfverfahren weichen in bestimmten Fällen von denjenigen ab, die in relevanten Internationalen Normen für Papier festgelegt wurden. Dies ist auf die begrenzte Menge von Prüfmaterial zurückzuführen.
Pâtes - Feuilles de laboratoire - Détermination des propriétés physiques (ISO 5270:1998)
La présente Norme internationale spécifie des méthodes d'essai pour la détermination des propriétés physiques de feuilles de laboratoire faites à partir de pâte. Elle est destinée à des feuilles de laboratoire préparées conformément à l'ISO 5269-1 et à l'ISO 5269-2 et doit être utilisée en conjonction avec les Normes internationales correspondant aux méthodes d'essai du papier auxquelles il est fait référence.Les méthodes spécifiées dans la présente Norme internationale diffèrent, en certains points, de celles spécifiées dans les Normes internationales applicables au papier, en raison de la quantité limitée de matériau d'essai disponible.NOTE - La préparation des feuilles de laboratoire pour la détermination du facteur de réflectance diffuse dans le bleu (blancheur ISO) des pâtes est spécifiée dans l'ISO 3688. Le mesurage du degré de blancheur ISO des pâtes, papier et carton est décrit dans l'ISO 2470.
Vlaknine - Laboratorijski listi - Določevanje fizikalnih lastnosti (ISO 5270:1998)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 5270:2000
01-december-2000
9ODNQLQH/DERUDWRULMVNLOLVWL'RORþHYDQMHIL]LNDOQLKODVWQRVWL ,62
Pulps - Laboratory sheets - Determination of physical properties (ISO 5270:1998)
Halbstoffe - Laborblätter - Bestimmung von physikalischen Eigenschaften (ISO
5270:1998)
Pâtes - Feuilles de laboratoire - Détermination des propriétés physiques (ISO
5270:1998)
Ta slovenski standard je istoveten z: EN ISO 5270:1999
ICS:
85.040 Vlaknine Pulps
SIST EN ISO 5270:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 5270:2000
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SIST EN ISO 5270:2000
INTERNATIONAL ISO
STANDARD 5270
Second edition
1998-04-01
Pulps — Laboratory sheets —
Determination of physical properties
Pâtes — Feuilles de laboratoire — Détermination des propriétés physiques
A
Reference number
ISO 5270:1998(E)
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SIST EN ISO 5270:2000
ISO 5270:1998(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.
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.
International Standard ISO 5270 was prepared by Technical Committee
ISO/TC 6, Paper, board and pulps, Subcommittee SC 5, Test methods and
quality specifications for pulps.
This second edition cancels and replaces the first edition (ISO 5270:1979),
of which it constitutes a technical revision.
Annex A of this International Standard is for information only.
© ISO 1998
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 the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
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SIST EN ISO 5270:2000
©
INTERNATIONAL STANDARD ISO ISO 5270:1998(E)
Pulps — Laboratory sheets — Determination of physical properties
1 Scope
This International Standard specifies test methods for the determination of some physical properties of laboratory
sheets made of pulp. It is intended for laboratory sheets prepared in accordance with ISO 5269-1 or ISO 5269-2
and shall be used in conjunction with the relevant International Standards for the corresponding test methods for
paper to which reference is made.
The methods specified in this International Standard deviate, in certain instances, from those specified in the
relevant International Standards for paper due to the limited amount of test material available.
NOTE — The preparation of laboratory sheets for the determination of the diffuse blue reflectance factor (ISO brightness) of
pulp is specified in ISO 3688. The measurement of ISO brightness of paper, board and pulps is described in ISO 2470.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 187:1990, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for
monitoring the atmosphere and conditioning of samples.
ISO 534:1988, Paper and board — Determination of thickness and apparent bulk density or apparent sheet density.
ISO 1924-2:1994, Paper and board — Determination of tensile properties — Part 2: Constant rate of elongation
method.
ISO 1974:1990, Paper — Determination of tearing resistance (Elmendorf method).
ISO 2493:1992, Paper and board — Determination of resistance to bending.
ISO 2758:1983, Paper — Determination of bursting strength.
1)
ISO 5269-1:— , Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-former
method.
2)
ISO 5269-2:— , Pulps — Preparation of laboratory sheets for physical testing — Part 2: Rapid-Köthen method.
ISO 5626:1993, Paper — Determination of folding endurance.
ISO 5636-5:1986, Paper and board — Determination of air permanence (medium range) — Part 5: Gurley method.
ISO 7263:1994, Corrugating medium — Determination of the flat crush resistance after laboratory fluting.
____________
1) To be published. (Revision of ISO 5269-1:1979)
2) To be published. (Revision of ISO 5269-2:1980)
1
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SIST EN ISO 5270:2000
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ISO
ISO 5270:1998(E)
ISO 9895:1989, Paper and board — Compressive strength — Short span test.
3)
ISO 12192:— , Paper and board — Compressive strength — Ring crush method.
3 Principle
Determination of physical properties of pulp, such as apparent bulk density, tensile index, tear index, burst index, air
permeance, folding endurance, resistance to bending, and compressive strength, using laboratory sheets prepared
from suspensions of unbeaten or beaten pulp and in equilibrium with the standard atmosphere for conditioning.
4 Apparatus
The equipment is specified in the respective International Standards referred to.
5 Trimmed laboratory sheets
5.1 Selection of laboratory sheets
Select the number of sheets required according to the properties tested. However, a minimum of four laboratory
sheets shall be selected. Each sheet shall be free of visible defects and shall be prepared so as to have a
2 2 2 2
grammage (oven-dry basis) of 60 g/m – 2 g/m as specified in ISO 5269-1 or 75 g/m – 2 g/m , as specified in
ISO 5269-2. For unspecified grammages (see table 1 in 5.4) a tolerance of 3 % is applied. The sheets form a set
2
which shall have a total area of not less than 0,1 m . For sheets prepared in accordance with ISO 5269-2, it is
recommended that a set of 10 sheets, which are without visible imperfections, be used. The sheets should not be
preconditioned.
2
NOTE — Sheet grammage on a conditioned basis would be approximately 65 g/m for sheets according to ISO 5269-1, and
2
81 g/m for ISO 5269-2. For sheets intended for determination of bending resistance and compressive strength properties, the
grammage on a conditioned basis will not be specified.
5.2 Conditioning of laboratory sheets
Condition the laboratory sheets at 23 °C – 1 °C and 50 % – 2 % relative humidity as specified in ISO 187 and keep
them in the conditioning atmosphere until testing is completed.
5.3 Determination of grammage, thickness and apparent bulk density
Trim the sheets to obtain a well-defined size, and determine the area to an accuracy of 0,5 %. Consult table 1 in 5.4
to establish a suitable size for the trimmed sheets that allows them to be used for cutting test pieces.
Before cutting test pieces, determine the grammage of the conditioned trimmed sheets in accordance with the
following procedure.
Determine the mass of the trimmed sheets by weighing to an accuracy of 0,2 %. Calculate the grammage g, in
grams per square metre, from the formula
m
g=
An×
where
m is the mass, in grams, of the conditioned trimmed sheets;
A is the area, in square metres, of one sheet;
n is the number of sheets.
____________
3) To be published.
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SIST EN ISO 5270:2000
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ISO
ISO 5270:1998(E)
Record the result to the first decimal place.
With the precision micrometer described in ISO 534, measure the thickness of a pile consisting of four trimmed
sheets with their non-glossy sides up. (Rapid-Köthen sheets have no glossy sides.) Take measurements at five
different places in the pile, taking care that the sheets are not displaced when changing the position of the pile for
each measurement. Calculate the mean thickness of a single sheet.
Calculate the apparent bulk density r, in kilograms per cubic metre, from the formula
g × 1000
ρ =
δ
where
g is the grammage, in grams per square metre, of the conditioned trimmed sheet;
δ is the mean thickness, in micrometres, of a single sheet as calculated in the previous paragraph.
Calculate the mean apparent bulk density and report the result to two significant figures.
5.4 Preparation of test pieces
Cut a sufficient number of test pieces from the conditioned trimmed sheets. The minimum requirements are given in
table 1.
NOTE — If a circular sheet of diameter 158 mm is used, only two test pieces for the determination of flat crush resistance or
ring crush resistance can be cut from each such sheet. These test pieces may be used for the determination of grammage.
Table 1
International Target Test piece dimensions Minimum number
Property
Standard grammage of test pieces
g mm
Length Width
02,
Tensile index ISO 1924-2 60 or 75 At least 100 – 2 mm between 8 from at least 4 sheets
15 ±
01,
clamps + extra length for
complete clam
...
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