Pulps -- Determination of drainability -- Part 1: Schopper-Riegler method

Pâtes -- Détermination de l'égouttabilité -- Partie 1: Méthode Schopper-Riegler

Vlaknine - Določanje odvodnjavanja - 1. del: Schopper-Rieglerjeva metoda

General Information

Status
Withdrawn
Publication Date
31-May-1995
Withdrawal Date
31-Mar-2000
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
01-Apr-2000
Due Date
01-Apr-2000
Completion Date
01-Apr-2000

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International Standard @ 526711
~~
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEWYHAPOAHAR OPTAHH3ALWlR no CTAHAAPTH3ALlHHWRGANlSATlON INTERNATIONALE DE fiORMALISATION
Pulps - Determination of drainability -
Part 1 : Schopper-Riegler method
Pâtes - Détermination de l'égouttabilité - Partie 1 : Méthode Schopper-Riegler
First edition - 1979-07-15
L-
________~
UDC 676.1 : 620.168.3 Ref. No. IS0 5267/1-1979 (E)
m
E
Descriptors : paper pulps, tests, drainability tests, test equipment.
O
Price based on 5 pages
E

---------------------- Page: 1 ----------------------
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Internatio-
nal Standards is carried out through IS0 technical committees. Every member body
interested in a subject for which a technical committee has been set up has the right to
U
be represented on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical Committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 5267/1 was developed by Technical Committee ISO/TC 6,
Paper, board and pulps, and was circulated to the member bodies in February 1978.
It has been approved by the member bodies of the following countries
Austria India South Africa, Rep. of
Belgium Iran Spain
Brazil Ireland Sweden
Switzerland
Canada Italy
Chile Kenya Turkey
United Kingdom
Egypt, Arab Rep. of Mexico
Finland Netherlands USA
France Norway USSR
Poland
Germany, F. R.
Hungary Romania
The member body of the following country expressed disapproval of the document on
technical grounds :
Bulgaria
O International Organization for Standardization, 1979 0
Printed in Switzerland

---------------------- Page: 2 ----------------------
DRAFT INTERNATIONAL STANDARD
IS0 5267/1-1979 (E)
Pulps - Determination of drainability -
Part 1 : Schopper-Riegler method
1 Scope 5 Definition
This International Standard specifies a method for determina- For the purposes of this International Standard, the following
definition applies :
tion of the drainability of a pulp suspension in water in terms of
the Schopper-Riegler (SR) number.
Schopper-Riegler number scale : A scale on which a
-
The Schopper-Riegler test is designed to provide a measure of discharge of 1 O00 ml corresponds to a SR number of zero and
the rate at which a dilute suspension of pulp may be zero discharge to a SR number of 100.
dewatered. It has been shown that the drainability is related to
the surface conditions and swelling of the fibres, and con-
6 Apparatus
stitutes a useful index of the amount of mechanical treatment
to which the pulp has been subjected.
Ordinary laboratory apparatus and
Results of this test do not necessarily correlate with the
drainage behaviour of a pulp material on a commercial paper
6.1 Schopper-Riegler apparatus, as described in annex A.
machine.
Instructions for maintenance of the apparatus are given in an-
A method for the determination of drainability in terms of the
nex B.
"Canadian Standard" freeness number is specified in
IS0 !267/2.1)
7 Preparation of sample
Take a sample of aqueous suspension of disintegrated pulp. If
2 Field of application
the concentration is not known exactly, dilute the suspension
to approximate 0,22 % (m/m) with distilled or deionized water
In principle, this method is applicable to all kinds of pulp in
(see note 31, and determine the stock concentration in accor-
aqueous suspension.
dance with IS0 4119. Then dilute the suspension to a stock
concentration of 0,2 I 0,002 % (m/m) and adjust the
NOTE - However, in practice, the Schopper-Riegler test provides ac-
ceptable results only if a sufficiently dense mat of fibres is formed on temperature to 20,O I 0,5 OC (see note 4). Throughout the
the wire screen. For this reason, the test is not recommended for some
preparation of the sample, take care to avoid the formation of
as those from well-beaten hard-
extremely short-fibred pulps, such
air bubbles in the suspension.
woods, as most of the fibres will pass through the wire screen,
resulting in anomalous reduction in the SR number. The most reliable
NOTES
results are obtained within the range of 10 to 90 SR number.
1 With time, an aqueous pulp suspension, withdrawn from the stock
preparation system or laboratory pulp evaluation equipment, can
undergo a change in Schopper-Riegler number. To avoid the effect of
3 Reference
this reversion phenomenon, pulp suspensions subjected to testing
more than 30 min after sampling should first be treated in the
IS0 4119, Pulps - Determination of stock concentration.
disintegration apparatus for 6 O00 revolutions of the propellor, at or
near the stock concentration specified for the SR test.
2 The test result is sensitive to the quantity of pulp fines, or "criII'', in
4 Principle
the suspension. Thickened pulp samples may lose some of this fibre
fraction. To avoid such losses during the course of thickening, the
Draining, through a fibre mat formed during the test on a wire
filtrate should be recirculated through the pulp pad until the filtrate is
screen, of a given volume of pulp in aqueous suspension into a
clear, and the pulp redispersed by disintegrating as described in note 1.
funnel provided with a bottom and a side orifice. Collection of
This procedure should be used to concentrate dilute pulp suspension
the discharge from the side orifice in a measuring cylinder,
Part II stock concentration required for the Schopper-Riegler
to the
graduated in Schopper-Riegler numbers. test.
1) At present at the stage of draft.
1

---------------------- Page: 3 ----------------------
IS0 5267/1-1979 (E)
3 As the drainage of a pulp suspension is affected considerably by been added. Read the SR number to the nearest unit when no
dissolved solids and the pH of the water, either distilled or deionized more water drips from the side orifice.
water of equivalent quality should be used throughout the test.
4 Where necessary for climatic reasons, a temperature of 25 f 5 OC
may be applied, provided that this is noted in the test report. In any
9 Expression of results
case, during the test the basic temperature chosen should be kept con-
stant within f 0,5 OC.
Carry out two determinations on each sample. Duplicate deter-
minations which differ by more than 4 YO shall be repeated.
8 Procedure
Clean the funnel and drainage chamber of the Schopper-
Riegler apparatus (6.1 i thoroughly and finally rinse with water. 10 Test report
Place the drainage chamber in the seat of the funnel. Adjust the
The test report shall give the following particulars :
temperature of the apparatus by rinsing it with water at
20,O + 0.5 OC (see note 4 in clause 7).
a) reference to this International Standard;
Place the sealing cone in the closed position and set the SR
b) all indications necessary for complete identification of
measuring cylinder beneath the side orifice.
the sample; e
Whilst stirring, transfer 1 O00 k 5 ml of homogeneous
...

SLOVENSKI STANDARD
SIST ISO 5267-1:
01-DSULO
9ODNQLQH'RORþDQMHRGYRGQMDYDQMDGHO6FKRSSHU5LHJOHUMHYDPHWRGD
Pulps -- Determination of drainability -- Part 1: Schopper-Riegler method
Pâtes -- Détermination de l'égouttabilité -- Partie 1: Méthode Schopper-Riegler
Ta slovenski standard je istoveten z: ISO 5267-1:19
ICS:
85.040 Vlaknine Pulps
SIST ISO 5267-1: en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 5267-1:1995

---------------------- Page: 2 ----------------------

SIST ISO 5267-1:1995

---------------------- Page: 3 ----------------------

SIST IS
...

SLOVENSKI STANDARD
SIST ISO 5267-1:1995
01-junij-1995
9ODNQLQH'RORþDQMHRGYRGQMDYDQMDGHO6FKRSSHU5LHJOHUMHYDPHWRGD
Pulps -- Determination of drainability -- Part 1: Schopper-Riegler method
Pâtes -- Détermination de l'égouttabilité -- Partie 1: Méthode Schopper-Riegler
Ta slovenski standard je istoveten z: ISO 5267-1:1979
ICS:
85.040 Vlaknine Pulps
SIST ISO 5267-1:1995 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 5267-1:1995

---------------------- Page: 2 ----------------------

SIST ISO 5267-1:1995
International Standard @ 526711
~~
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEWYHAPOAHAR OPTAHH3ALWlR no CTAHAAPTH3ALlHHWRGANlSATlON INTERNATIONALE DE fiORMALISATION
Pulps - Determination of drainability -
Part 1 : Schopper-Riegler method
Pâtes - Détermination de l'égouttabilité - Partie 1 : Méthode Schopper-Riegler
First edition - 1979-07-15
L-
________~
UDC 676.1 : 620.168.3 Ref. No. IS0 5267/1-1979 (E)
m
E
Descriptors : paper pulps, tests, drainability tests, test equipment.
O
Price based on 5 pages
E

---------------------- Page: 3 ----------------------

SIST ISO 5267-1:1995
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards institutes (IS0 member bodies). The work of developing Internatio-
nal Standards is carried out through IS0 technical committees. Every member body
interested in a subject for which a technical committee has been set up has the right to
U
be represented on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical Committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council.
International Standard IS0 5267/1 was developed by Technical Committee ISO/TC 6,
Paper, board and pulps, and was circulated to the member bodies in February 1978.
It has been approved by the member bodies of the following countries
Austria India South Africa, Rep. of
Belgium Iran Spain
Brazil Ireland Sweden
Switzerland
Canada Italy
Chile Kenya Turkey
United Kingdom
Egypt, Arab Rep. of Mexico
Finland Netherlands USA
France Norway USSR
Poland
Germany, F. R.
Hungary Romania
The member body of the following country expressed disapproval of the document on
technical grounds :
Bulgaria
O International Organization for Standardization, 1979 0
Printed in Switzerland

---------------------- Page: 4 ----------------------

SIST ISO 5267-1:1995
DRAFT INTERNATIONAL STANDARD
IS0 5267/1-1979 (E)
Pulps - Determination of drainability -
Part 1 : Schopper-Riegler method
1 Scope 5 Definition
This International Standard specifies a method for determina- For the purposes of this International Standard, the following
definition applies :
tion of the drainability of a pulp suspension in water in terms of
the Schopper-Riegler (SR) number.
Schopper-Riegler number scale : A scale on which a
-
The Schopper-Riegler test is designed to provide a measure of discharge of 1 O00 ml corresponds to a SR number of zero and
the rate at which a dilute suspension of pulp may be zero discharge to a SR number of 100.
dewatered. It has been shown that the drainability is related to
the surface conditions and swelling of the fibres, and con-
6 Apparatus
stitutes a useful index of the amount of mechanical treatment
to which the pulp has been subjected.
Ordinary laboratory apparatus and
Results of this test do not necessarily correlate with the
drainage behaviour of a pulp material on a commercial paper
6.1 Schopper-Riegler apparatus, as described in annex A.
machine.
Instructions for maintenance of the apparatus are given in an-
A method for the determination of drainability in terms of the
nex B.
"Canadian Standard" freeness number is specified in
IS0 !267/2.1)
7 Preparation of sample
Take a sample of aqueous suspension of disintegrated pulp. If
2 Field of application
the concentration is not known exactly, dilute the suspension
to approximate 0,22 % (m/m) with distilled or deionized water
In principle, this method is applicable to all kinds of pulp in
(see note 31, and determine the stock concentration in accor-
aqueous suspension.
dance with IS0 4119. Then dilute the suspension to a stock
concentration of 0,2 I 0,002 % (m/m) and adjust the
NOTE - However, in practice, the Schopper-Riegler test provides ac-
ceptable results only if a sufficiently dense mat of fibres is formed on temperature to 20,O I 0,5 OC (see note 4). Throughout the
the wire screen. For this reason, the test is not recommended for some
preparation of the sample, take care to avoid the formation of
as those from well-beaten hard-
extremely short-fibred pulps, such
air bubbles in the suspension.
woods, as most of the fibres will pass through the wire screen,
resulting in anomalous reduction in the SR number. The most reliable
NOTES
results are obtained within the range of 10 to 90 SR number.
1 With time, an aqueous pulp suspension, withdrawn from the stock
preparation system or laboratory pulp evaluation equipment, can
undergo a change in Schopper-Riegler number. To avoid the effect of
3 Reference
this reversion phenomenon, pulp suspensions subjected to testing
more than 30 min after sampling should first be treated in the
IS0 4119, Pulps - Determination of stock concentration.
disintegration apparatus for 6 O00 revolutions of the propellor, at or
near the stock concentration specified for the SR test.
2 The test result is sensitive to the quantity of pulp fines, or "criII'', in
4 Principle
the suspension. Thickened pulp samples may lose some of this fibre
fraction. To avoid such losses during the course of thickening, the
Draining, through a fibre mat formed during the test on a wire
filtrate should be recirculated through the pulp pad until the filtrate is
screen, of a given volume of pulp in aqueous suspension into a
clear, and the pulp redispersed by disintegrating as described in note 1.
funnel provided with a bottom and a side orifice. Collection of
This procedure should be used to concentrate dilute pulp suspension
the discharge from the side orifice in a measuring cylinder,
Part II stock concentration required for the Schopper-Riegler
to the
graduated in Schopper-Riegler numbers. test.
1) At present at the stage of draft.
1

---------------------- Page: 5 ----------------------

SIST ISO 5267-1:1995
IS0 5267/1-1979 (E)
3 As the drainage of a pulp suspension is affected considerably by been added. Read the SR number to the nearest unit when no
dissolved solids and the pH of the water, either distilled or deionized more water drips from the side orifice.
water of equivalent quality should be used throughout the test.
4 Where necessary for climatic reasons, a temperature of 25 f 5 OC
may be applied, provided that this is noted in the test report. In any
9 Expression of results
case, during the test the basic temperature chosen should be kept con-
stant within f 0,5 OC.
Carry out two determinations on each sample. Duplicate deter-
minations which differ by more than 4 YO shall be repeated.
8 Procedure
Clean the funnel and drainage chamber of the Schopper-
Riegler apparatus (6.1 i thoroughly and finally rinse with water. 10 Test report
Place the drainage chamber in the seat of the funnel. Adjust the
The test report shall give the following particulars :
temperature of the appar
...

Norme internationale 52671 1
INTERNATIONAL ORGANIZATION FOR ÇTANOAROIZATION~ME)YHAPO/lHAR OPïAHH3AUHR no CTAHAAlTH3A~HH«)RGANlSATlON INTERNATIONAL DE NORMALISATION
Pâtes - Détermination de I'égouttabilité -
Partie 1 : Méthode Schopper-Riegler
Pulps - Determination of drainability - Part 1 : Schopper-Riegler method
Première édition - 1979-07-15
L-
I
U'
1
Réf. no : IS0 5267/1-1979 (FI
CDU 676.1 : 620.168.3
R
E
Descripteurs : pâte à papier, essai, essai d'égouttage, matériel d'essai.
c
.
6
M
Prix basé sur 5 pages
s
-4,

---------------------- Page: 1 ----------------------
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d‘organismes nationaux de normalisation (comités membres de I’ISO). L‘élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec 1’1S0, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale IS0 526711 a été élaborée par le comité technique ISO/TC 6,
Papiers, cartons etpâtes, et a été soumise aux comités membres en février 1978.
Les comités membres des pays suivants l‘ont approuvée :
Afrique du Sud, Rép. d‘ France
Pologne
Allemagne, R. F. Hongrie Roumanie
Autriche Inde Royaume-Uni
Belgique Iran Suède
Brésil Irlande Suisse
Canada Italie Turquie
Chili Kenya URSS
Egypte, Rép. arabe d’ Mexique USA
Espagne Norvège
Finlande Pays-Bas
Le comité membre du pays suivant l’a désapprouvée pour des raisons techniques :
Bulgarie
0 Organisation internationale de normalisation, 1979 O
Imprimé en Suisse
c _-

---------------------- Page: 2 ----------------------
NORM E INTER NATIONALE IS0 5267/1-1979 (FI
Pâtes - Détermination de I'égouttabilité -
Partie 1 : Méthode de Schopper-Riegler
1 Objet 5 Définition
La présente Norme internationale spécifie une méthode de Dans le cadre de la présente Norme internationale, la définition
détermination de I'égouttabilité, en termes d'indice Schopper-
suivante est applicable :
Riegler (SR), d'une suspension aqueuse de pâte.
échelle de l'indice Schopper-Riegler : Échelle sur laquelle
L'essai Schopper-Riegler est concu pour donner une mesure de 1 O00 ml correspond à un degré SR nul, tan-
un écoulement de
la vitesse à laquelle l'eau peut être extraite d'une suspension de dis qu'un écoulement nul correspond à un degré SR égal à 100.
pâte diluée. II a été démontré que I'égouttabilité est fonction de
l'état de surface et du gonflement des fibres, et qu'elle repré-
sente un indice utile de l'importance du traitement mécanique
6 Appareillage
subi par la pâte.
Équipement courant de laboratoire, et
Du point de vue égouttabilité, les valeurs de Schopper-Riegler
ne correspondent pas forcément au comportement de la pâte
sur une machine à papier industrielle. 6.1 Appareil de Schopper-Riegler, tel que défini dans
l'annexe A.
La méthode de détermination de I'égouttabilité en termes de
l'indice Canadian Standard est spécifiée dans 1'1S0 5267/2.1)
Les instructions pour l'entretien de l'appareil sont données
B.
dans l'annexe
2 Domaine d'application
7 Préparation de l'échantillon
En principe, cette méthode est applicable à tous les types de
pâtes en suspension aqueuse.
Prendre un échantillon de suspension aqueuse de pâte désinté-
grée. Si la concentration n'est pas connue de facon exacte,
-
NOTE - En pratique, cependant, l'essai Schopper-Riegler ne donne
diluer la suspension à 0.22 % (m/m) environ au moyen d'eau
des résultats acceptables que si un gâteau de fibres suffisamment
-
distillée ou désionisée (voir note 3), et déterminer la concentra-
dense est formé sur la toile. Pour cette raison, l'essai n'est pas recom-
tion en pâte conformément à I'ISO 41 19. Diluer ensuite la SUS-
mandé pour certaines pâtes à fibres extrêmement courtes telles que
celles de feuillus fortement raffinées, pour lesquelles la majeure partie
pension à une concentration de 0,2 ? 0,002 % (mlm) et ajus-
des fibres passe à travers la toile, donnant ainsi une réduction anormale
ter la température à 20,O f 0,5 OC (voir note 4). Tout au long
de l'indice SR. Les résultats les plus fiables sont obtenus pour des indi-
de la préparation de l'échantillon, prendre soin d'éviter la for-
ces Schopper-Riegler allant de 10 à 90.
mation de bulles d'air dans la suspension.
NOTES
3 Référence
1 Les suspensions aqueuses de pâtes prélevées dans les circuits de
préparation de pâte, ou dans l'appareillage de laboratoire pour essais
IS0 41 19, Prites - Détermination de la concentration en pâte.
sur pâtes, peuvent donner avec le temps un Changement d'indice de
Schopper-Riegler. Dans le but de remédier à ce phénomène, les SUS-
pensions de pâte qui sont soumises à l'essai plus de 30 min après prélè-
4 Principe
vement seront d'abord traitées dans l'appareil de désintégration à rai-
son de 6 O00 rotations de l'hélice et à une concentration égale ou pro-
Égouttage d'un volume connu de suspension aqueuse de pâte
che de celle requise pour l'essai SR.
à travers le matelas de fibres formé durant l'essai sur une toile
2 Le résultat de l'essai est affecté par la quantité de fines ou ((criIl)),
métallique dans un entonnoir muni d'un orifice axial et d'un ori-
dans la suspension. Les échantillons de pâte qui sont épaissis peuvent
fice latéral. Mesurage de la quantité de filtrat ayant passé par
perdre une partie de cette fraction de fibres. De facon à éviter de telles
l'orifice latéral dans une éprouvette spéciale graduée en unités
pertes au cours de I'épaississage, le filtrat devrait être refiltré à travers
Schopper-Riegler. le gâteau de pâte jusqu'à ce qu'il soit clair et la pâte mise en suspension
Actuellement au stade de projet.
1)
1

---------------------- Page: 3 ----------------------
IS0 5267/1-1979 (FI
de la facon décrite dans la note 1. Ce mode opératoire devrait être uti- Relever le cône d'étanchéité 5 s après que la totalité de la sus-
lisé pour concentrer les suspensions diluées de pâte jusqu'a la concen- pension de la pâte ait été versée. Lire l'indice SR à l'unité près
tration en pâte de 0,2 % (rn/rni requise par l'essai Schopper-Riegler.
quand l'eau a cessé de s'écouler de l'orifice latéral.
3 L'essai Schopper-Riegler étant considérablement affecté par les
matières dissoutes et par le pH de l'eau, on utilisera tout au long de
l'essai soit de l'eau distillée, soit de l'eau désionisée de qualité équiva-
lente.
4 Si nécessaire pour des raisons de conditions climatiques, une tem- 9 Expression des résultats
pérature de 25 f 5 OC peut être utilisée, à la condition que celle-ci soit
notée dans le procès-verbal d'essai. Dans tous les cas, la température
Faire deux déterminations sur chaque échantillon. La moyenne
de base choisie devrait être maintenue constante en cours de l'essai
de deux mesures à une unité SR près constitue l'indice
dans les limites i 0.5 OC.
Schopper-Riegler. Les mesures effectuées en double, différant
de plus de 4 %, doivent être refaites.
8 Mode opératoire
Nettoyer soigneusement l'entonnoir et la chambre d'égouttage
de l'appareil Schopper-Riegler (6.11, puis rincer avec de l'eau et
10 Procès-verbald'essai
placer la chambre d'égouttage dans son siège sur l'entonnoir.
U
Ajuster la température de l'appareil en le rincant avec de l'eau à
Le procès-verbal d'essai doit contenir les indications suivantes :
20,O I 0,5 OC (voir note 4 du chapitre 7).
référence de la présente Norme internationale;
Placer le cône d'étanchéité en position fermée et placer a)
SR e
...

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