EN ISO 5263-3:2023

Pulps - Laboratory wet disintegration - Part 3: Disintegration of mechanical pulps at ≥ 85°C (ISO 5263-3:2023)

This document specifies an apparatus and the procedures for the laboratory wet disintegration of mechanical pulps that exhibit latency except when brightness is measured. This apparatus and procedure can be used for preparation of the test portion in other International Standards dealing with pulps.
This document is applicable to all kind of mechanical pulps (i.e. mechanical, semi-chemical and chemi-mechanical pulps) exhibiting latency.

Faserstoffe - Nassaufschlagen im Labor - Teil 3: Aufschlagen von Holzstoff bei ≥ 85 °C (ISO 5263-3:2023)

Dieses Dokument legt eine Prüfeinrichtung und die Verfahren zum Nassaufschlagen von Holzstoffen mit Latenz im Labor fest, außer wenn der Weißgrad gemessen wird. Die Prüfeinrichtung und das Verfahren kann auch zur Vorbereitung von Prüfmengen in anderen Internationalen Normen zum Thema Faserstoffe verwendet werden.
Dieses Dokument ist für alle Holzstoffarten (d. h. Holzstoffe, Halbzellstoffe und chemische Holzstoffe) mit Latenz anwendbar.

Pâtes - Désintégration humide en laboratoire - Partie 3: Désintégration des pâtes mécaniques à une température supérieure ou égale à 85 °C (ISO 5263-3:2023)

Le présent document spécifie un appareillage et les modes opératoires pour la désintégration humide en laboratoire des pâtes mécaniques qui présentent une latence, excepté lorsque le degré de blancheur est mesuré. Cet appareillage et ce mode opératoire peuvent être utilisés pour la préparation de la prise d’essai dans d’autres Normes internationales portant sur les pâtes.
Le présent document est applicable à tous les types de pâtes mécaniques (à savoir pâtes mécaniques, mi-chimiques et chimico-mécaniques) présentant une latence.

Vlaknine - Laboratorijsko razvlaknjevanje v mokrem - 3. del: Razvlaknjevanje mehanskih vlaknin pri ≥ 85°C (ISO 5263-3:2023)

Ta dokument določa napravo in postopke za laboratorijsko mokro razvlaknjevanje mehanske celuloze, ki kaže zgubanost, razen če je izmerjena svetlost. Ta naprava in postopek se lahko uporabljata za pripravo testnih količin v drugih mednarodnih standardih, ki obravnavajo celulozo.
Dokument se uporablja za vse vrste mehanske celuloze (tj. mehanska, polkemična in kemično-mehanska celuloza), ki izkazuje zgubanost.

General Information

• Status: Published
• Publication Date: 21-Feb-2023
• ICS: 85.040 - Pulps
• Technical Committee: CEN/TC 172 - Pulp, paper and board
• Drafting Committee: CEN/TC 172 - Pulp, paper and board
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 22-Feb-2023
• Completion Date: 22-Feb-2023
• Ref Project: SIST EN ISO 5263-3:2023 - Pulps - Laboratory wet disintegration - Part 3: Disintegration of mechanical pulps at ≥ 85°C (ISO 5263-3:2023)

Relations

• Replaces: EN ISO 5263-3:2004 - Pulps - Laboratory wet disintegration - Part 3: Disintegration of mechanical pulps at > 85 degrees C (ISO 5263-3:2004)
• Effective Date: 19-Jan-2023

Overview

EN ISO 5263-3:2023 - "Pulps - Laboratory wet disintegration - Part 3: Disintegration of mechanical pulps at ≥ 85 °C" is a CEN-endorsed ISO standard that specifies the apparatus and procedures for laboratory wet disintegration of mechanical pulps exhibiting latency (except when brightness is measured). The method is intended for preparing test portions used in other pulp and paper test standards and applies to all types of mechanical pulps (mechanical, semi‑chemical and chemi‑mechanical) that require latency removal at elevated temperature.

Key topics and technical requirements

• Scope & applicability: Applies to mechanical pulps exhibiting latency; brightness testing uses ISO 5263‑2 instead.
• Temperature requirement: Disintegration and latency removal are carried out at ≥ 85 °C. The standard explicitly requires reducing the suspension temperature immediately after disintegration.
• Disintegrator types:
  • Standard disintegrator (Annex A) - may be electrically heated or supplied with hot water. Procedure for checking the standard disintegrator is provided (Annex B).
  • Circulation disintegrator (Domtar type) (Annex C) - requires water supply at 90–95 °C and controlled pump operation.
  • The disintegrator type used must be reported because they affect fibre treatment differently.
• Test portion and preparation:
  • Standard disintegrator: test portion = (50 ± 5) g oven‑dry pulp.
  • Circulation disintegrator: test portion = (56 ± 1) g oven‑dry pulp.
  • Use standard water (ISO 14487), distilled or tap water as required by downstream tests.
  • Soaking recommendations:
    • < 20% dry matter - 0 min
    • 20–60% - 30 min

    • 60% - 4 h

    • Flash‑dried pulp - minimum 10 min
• Safety: Procedures involve high temperatures (≥85 °C); appropriate safety precautions are required.
• Reporting: Test report shall include apparatus type, temperatures, soaking and disintegration conditions, and any deviations.

Applications and who uses this standard

• Pulp and paper laboratories performing quality control (QC), acceptance testing and inter-lab comparisons.
• Mill process control teams needing reproducible latency removal for mechanical pulp characterization.
• R&D groups evaluating fibre properties, drainage, strength and other pulp properties that depend on fully disintegrated samples.
• Standards bodies and test method developers using the disintegration procedure as a sample-preparation step for other standardized tests.

Related standards

• ISO 5263‑2 - Hot disintegration for brightness measurements (see note: brightness testing uses part 2).
• ISO 638‑1 - Determination of dry matter (oven-drying).
• ISO 4119 - Determination of stock concentration.
• ISO 14487 - Standard water for physical testing.

Keywords: EN ISO 5263-3:2023, laboratory wet disintegration, mechanical pulps, latency removal, disintegrator, ≥85°C, pulp testing, standard water.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2023
Nadomešča:
SIST EN ISO 5263-3:2005
Vlaknine - Laboratorijsko razvlaknjevanje v mokrem - 3. del: Razvlaknjevanje
mehanskih vlaknin pri ≥ 85°C (ISO 5263-3:2023)
Pulps - Laboratory wet disintegration - Part 3: Disintegration of mechanical pulps at ≥
85°C (ISO 5263-3:2023)
Faserstoffe - Nassaufschlagen im Labor - Teil 3: Aufschlagen von Holzstoff bei ≥ 85 °C
(ISO 5263-3:2023)
Pâtes - Désintégration humide en laboratoire - Partie 3: Désintégration des pâtes
mécaniques à une température supérieure ou égale à 85 °C (ISO 5263-3:2023)
Ta slovenski standard je istoveten z: EN ISO 5263-3:2023
ICS:
85.040 Vlaknine Pulps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5263-3
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 85.040 Supersedes EN ISO 5263-3:2004
English Version
Pulps - Laboratory wet disintegration - Part 3:
Disintegration of mechanical pulps at  85°C (ISO 5263-
3:2023)
Pâtes - Désintégration humide en laboratoire - Partie 3: Faserstoffe - Nassaufschlagen im Labor - Teil 3:
Désintégration des pâtes mécaniques à une Aufschlagen von Holzstoff bei  85 °C (ISO 5263-
température supérieure ou égale à 85 °C (ISO 5263-
3:2023)
3:2023)
This European Standard was approved by CEN on 11 February 2023.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5263-3:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 5263-3:2023) 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 August 2023, and conflicting national standards shall
be withdrawn at the latest by August 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 5263-3:2004.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 5263-3:2023 has been approved by CEN as EN ISO 5263-3:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 5263-3
Second edition
2023-02
Pulps — Laboratory wet
disintegration —
Part 3:
Disintegration of mechanical pulps at
≥85°C
Pâtes — Désintégration humide en laboratoire —
Partie 3: Désintégration des pâtes mécaniques à une température
supérieure ou égale à 85 °C
Reference number
ISO 5263-3:2023(E)
ISO 5263-3:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 5263-3:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
5 Preparation of test portion . 2
6 Procedure .3
6.1 General . 3
6.2 Disintegration and latency removal . 3
6.3 Standard disintegrator . . 3
6.4 Circulation disintegrator . . 4
7 Test report . 4
Annex A (normative) Construction of the standard disintegrator . 6
Annex B (normative) Checking the standard disintegrator . 9
Annex C (normative) Circulation disintegrator .10
Annex D (informative) The effect of latency in mechanical pulps .11
Bibliography .13
iii
ISO 5263-3:2023(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 of the voluntary nature of standards, 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/TC 172, Pulp, paper
and board, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This second edition cancels and replaces the first edition (ISO 5263-3:2004), which has been technically
revised.
The main changes are as follows:
— the requirement to reduce the temperature of the suspension immediately following disintegration
has been made explicit.
A list of all parts in the ISO 5263 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
INTERNATIONAL STANDARD ISO 5263-3:2023(E)
Pulps — Laboratory wet disintegration —
Part 3:
Disintegration of mechanical pulps at ≥85°C
1 Scope
This document specifies an apparatus and the procedures for the laboratory wet disintegration
of mechanical pulps that exhibit latency except when brightness is measured. This apparatus and
procedure can be used for preparation of the test portion in other International Standards dealing with
pulps.
This document is applicable to all kind of mechanical pulps (i.e. mechanical, semi-chemical and chemi-
mechanical pulps) exhibiting latency.
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 638-1, Paper, board, pulps and cellulosic nanomaterials — Determination of dry matter content by
oven-drying method — Part 1: Materials in solid form
ISO 4119, Pulps — Determination of stock concentration
ISO 14487, Pulps — Standard water for physical testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
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
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 to entry: 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 its preservation
is caused by the hardening of the lignin.
Note 2 to entry: The degree of latency in a pulp is generally related to the consistency and energy applied during
the mechanical processing.
ISO 5263-3:2023(E)
3.3
latency removal
procedure using a combination of mechanical treatment, i.e. disintegration, and heat treatment using a
temperature exceeding the softening temperature of lignin
Note 1 to entry: In this document, the temperature for latency removal is stated to be not less than 85 °C.
4 Apparatus
The usual laboratory apparatus and, in particular, the following shall be used.
4.1 Disintegrator with heat supply or hot-water supply capable of maintaining a temperature
of ≥85 °C in the suspension during the entire disintegration procedure. Use either the standard
disintegrator (4.1.1) or the circulation disintegrator (4.1.2).
Since the two types of disintegrator do not treat the fibres in the same way (see Reference [5]), the
disintegrator used shall be reported.
4.1.1 Standard disintegrator, in accordance with Annex A. For latency removal, the standard
disintegrator shall be equipped with an electrically heated container or shall have a supply of hot water,
capable of keeping the temperature of the fibre-water suspension at the temperature stated in 4.1.
The procedure for checking the standard disintegrator is given in Annex B.
For safety reasons, it is not recommended to use a standard disintegrator intended for disintegration at
20 °C and an electric hot plate for boiling water.
4.1.2 Circulation disintegrator, of Domtar type, in accordance with Annex C. The disintegrator shall
have a supply of water of a temperature of between 90 °C and 95 °C.
There shall be a means of running the pump for short intervals of time. To prevent damage to the pump,
the pump shall not be run dry for more than 3 s.
4.2 Balance, capable of weighing with an accuracy of 0,2 g.
4.3 Water, standard water, as specified in ISO 14487, distilled water or tap water, depending on the
requirement in the procedure for which the disintegrated pulp will be used.
5 Preparation of test portion
If the pulp is wet or air-dry, determine the dry matter content in accordance with ISO 638-1. If the pulp
is in slush form, determine the dry matter content in accordance with ISO 4119.
If the concentration of a slush pulp sample is less than 1,5 % by mass, thicken it to the appropriate
volume, carefully avoiding the loss
...