ISO 5263-2:2004
(Main)Pulps — Laboratory wet disintegration — Part 2: Disintegration of mechanical pulps at 20 degrees C
Pulps — Laboratory wet disintegration — Part 2: Disintegration of mechanical pulps at 20 degrees C
ISO 5263-2:2004 specifies an apparatus and the procedures for the laboratory-wet disintegration of mechanical pulps that do not exhibit latency or pulps where latency has already been removed. This apparatus and procedure are required for preparation of the test portion in a number of other International Standards dealing with pulps. In principle, this method is applicable to all kind of mechanical pulps (i.e. mechanical, semi-chemical and chemo-mechanical pulps) that do not exhibit latency, including recovered fibres from mechanical pulps. It is not suitable for mechanical pulps exhibiting latency for which the disintegration procedure described in ISO 5263-3 shall be used. The procedure specified by ISO 5263-2:2004 should also be used to disintegrate all mechanical pulps to be measured for brightness.
Pâtes — Désintégration humide en laboratoire — Partie 2: Désintégration des pâtes mécaniques à 20 degrés C
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 5263-2
First edition
2004-09-01
Pulps — Laboratory wet disintegration —
Part 2:
Disintegration of mechanical pulps at
20 °C
Pâtes — Désintégration humide en laboratoire —
Partie 2: Désintégration des pâtes mécaniques à 20 °C
Reference number
ISO 5263-2:2004(E)
©
ISO 2004
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ISO 5263-2:2004(E)
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ii © ISO 2004 – All rights reserved
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ISO 5263-2:2004(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references . 1
3 Definition. 1
4 Apparatus. 2
5 Preparation of test portion. 2
6 Procedure. 3
7 Test report. 3
Annex A (normative) Construction of the Standard disintegration . 4
Annex B (normative) Checking the Standard disintegrator. 6
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ISO 5263-2:2004(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 5263-2 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 5,
Test methods and quality specifications for pulps.
This first edition cancels and partially replaces ISO 5263:1995 which has been technically revised. In the
revision, ISO 5263 has been divided into three parts; Part 1 which is applicable to chemical pulps, Part 2
which is applicable to mechanical pulps without latency and Part 3 which is applicable to mechanical pulps
exhibiting latency. In Part 3, an informative Annex has been inserted describing the effect of latency in
mechanical pulps.
ISO 5263 consists of the following parts, under the general title Pulps — Laboratory wet disintegration:
— Part 1: Disintegration of chemical pulps
— Part 2: Disintegration of mechanical pulps at 20 °C
— Part 3: Disintegration of mechanical pulps at W 85 °C
iv © ISO 2004 – All rights reserved
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INTERNATIONAL STANDARD ISO 5263-2:2004(E)
Pulps — Laboratory wet disintegration —
Part 2:
Disintegration of mechanical pulps at 20 °C
1 Scope
This part of ISO 5263 specifies an apparatus and the procedures for the laboratory-wet disintegration of
mechanical pulps that do not exhibit latency or mechanical pulps where latency has already been removed.
This apparatus and procedure are required for preparation of the test portion in a number of other
International Standards dealing with pulps.
In principle, this method is applicable to all kind of mechanical pulps (i.e. mechanical, semi-chemical and
chemi-mechanical pulps) that do not exhibit latency, including recovered fibres from mechanical pulps. It is not
suitable for mechanical pulps exhibiting latency for which the disintegration procedure described in ISO 5263-
3 shall be used.
The procedure specified by ISO 5263-2 should also be used to disintegrate all mechanical pulps to be
measured for brightness.
NOTE Brightness is not significantly altered by the presence of latency; however, hot disintegration of mechanical
pulps can lead to significant loss of brightness.
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 638, Pulps — Determination of dry matter content
ISO 4119, Pulps — Determination of stock concentration
ISO 14487, Pulps — Standard water for physical testing
3 Definition
For the purposes of this part of ISO 5263, the following definitions apply.
3.1
disintegration of mechanical pulp
mechanical treatment in water so that interlaced fibres, which were free in the pulp stock, are again separated
from one another without appreciably changing their structural properties
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ISO 5263-2:2004(E)
3.2
latency
condition of a mechanical pulp in which some of its properties are inhibited and require disintegration of the
pulp at elevated temperature to be developed
NOTE 1 Latency is due to the distorted form of the fibres, acquired in mechanical processing, especially at high
consistency, and subsequently preserved upon cooling at high consistency. It is assumed that it
...
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