EN ISO 5269-2:2000
(Main)Pulps - Preparation of laboratory sheets for physical testing - Part 2: Rapid-Köthen method (ISO 5269-2:1998)
Pulps - Preparation of laboratory sheets for physical testing - Part 2: Rapid-Köthen method (ISO 5269-2:1998)
This part of ISO 5269 specifies a method, using a Rapid-Ko~then sheet former, for the preparation of laboratory sheets of pulp for the purpose of carrying out subsequent physical tests on these sheets in order to assess the relevant properties of the pulp itself. This part of ISO 5269 is applicable to most kinds of pulp. It is not suitable for some pulps with very long fibres, such as those made from unshortened cotton, flax and similar materials. This method is not suitable for the preparation of laboratory sheets for the determination of diffuse blue reflectance factor (ISO brightness) in accordance with ISO 3688.
Faserstoffe - Laborblattbildung für physikalische Prüfungen - Teil 2: Rapid- Köthen-Verfahren (ISO 5269-2:1998)
Dieser Teil der ISO 5269 legt ein Verfahren für die Blattbildung zur Herstellung von Laborblättern auf einer Rapid-Köthen-Blattbildungseinrichtung fest. Die so hergestellten Laborblätter können anschließend physikalischen Prüfungen unterzogen werden, um die relevanten Eigenschaften des Faserstoffes zu bestimmen. Dieser Teil der ISO 5269 ist auf die Mehrzahl aller Faserstoffe anwendbar, eignet sich jedoch nicht für besonders langfaserige Faserstoffe, wie sie beispielsweise aus ungekürzter Baumwolle, Flachs und ähnlichen Rohstoffen hergestellt werden. Ferner ist dieses Verfahren nicht für die Herstellung von Laborblättern zur Bestimmung des diffusen blauen Reflexionsfaktors (ISO-Weißgrad) nach ISO 3688 [1] geeignet.
Pâtes- Préparation des feuilles de laboratoire pour essais physiques - Partie 2: Méthode Rapid-Köthen (ISO 5269-2:1998)
IEC 61935-2:2022 spécifie les méthodes d’essai applicables aux cordons à paires symétriques et aux cordons coaxiaux utilisés comme cordons d’équipements, cordons de brassage et cordons CP dans des systèmes de câblage, conformément à l’ISO/IEC 11801‑1. Les méthodes d’essai et leurs exigences associées permettent de démontrer les performances et la fiabilité et de garantir la compatibilité de ces cordons à paires symétriques et cordons coaxiaux au cours de leur durée de vie opérationnelle. Le présent document peut également être utilisé en vue de fournir une méthodologie d'essai pour l'évaluation des performances d'autres cordons.
Cette quatrième édition annule et remplace la troisième édition parue en 2010. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a. inclusion des cordons des catégories 8.1 et 8.2 tels qu'ils sont définis dans l’ISO/IEC 11801‑1.
Vlaknine - Izdelava laboratorijskih listov za preskušanje fizikalnih lastnost - 2. del: Metoda na Rapid-Köthenovem aparatu (ISO 5269-2:1998)
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vlaknine - Izdelava laboratorijskih listov za preskušanje fizikalnih lastnost - 2. del: Metoda na Rapid-Köthenovem aparatu (ISO 5269-2:1998)Faserstoffe - Laborblattbildung für physikalische Prüfungen - Teil 2: Rapid- Köthen-Verfahren (ISO 5269-2:1998)Pâtes- Préparation des feuilles de laboratoire pour essais physiques - Partie 2: Méthode Rapid-Köthen (ISO 5269-2:1998)Pulps - Preparation of laboratory sheets for physical testing - Part 2: Rapid-Köthen method (ISO 5269-2:1998)85.040VlakninePulpsICS:Ta slovenski standard je istoveten z:EN ISO 5269-2:2000SIST EN ISO 5269-2:2000en01-december-2000SIST EN ISO 5269-2:2000SLOVENSKI
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SIST EN ISO 5269-2:2000
SIST EN ISO 5269-2:2000
SIST EN ISO 5269-2:2000
SIST EN ISO 5269-2:2000
SIST EN ISO 5269-2:2000
AReference numberISO 5269-2:1998(E)INTERNATIONALSTANDARDISO5269-2Second edition1998-08-01Pulps — Preparation of laboratory sheetsfor physical testing —Part 2:Rapid-Köthen methodPâtes — Préparation des feuilles de laboratoire pour essais physiques —Partie 2: Méthode Rapid-KöthenSIST EN ISO 5269-2:2000
ISO 5269-2:1998(E)©
ISO 1998All rights reserved. Unless otherwise specified, no part of this publication may be reproducedor utilized in any form or by any means, electronic or mechanical, including photocopying andmicrofilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 · CH-1211 Genève 20 · SwitzerlandInternetiso@iso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwidefederation of national standards bodies (ISO member bodies). The work ofpreparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for whicha technical committee has been established has the right to be representedon that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISOcollaborates closely with the International Electrotechnical Commission(IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technical committees arecirculated to the member bodies for voting. Publication as an InternationalStandard requires approval by at least 75 % of the member bodies castinga vote.International Standard ISO 5269-2 was prepared by Technical CommitteeISO/TC 6, Paper, board and pulps, Subcommittee SC 5, Test methods andquality specifications for pulp.This second edition cancels and replaces the first edition (ISO 5269-2:1980),of which it constitutes a technical revision.ISO 5269 consists of the following parts, under the general title Pulps —Preparation of laboratory sheets for physical testing:—Part 1: Conventional sheet-former method—Part 2: Rapid-Köthen methodAnnex A of this part of ISO 5269 is for information only.SIST EN ISO 5269-2:2000
© ISOISO 5269-2:1998(E)iiiIntroductionIt has been agreed that the ultimate aim of standardization of thepreparation of laboratory sheets should be to develop one method which isinternationally acceptable and which, if possible, permits the use ofdifferent types of sheet-making apparatus.For practical reasons, it has not proved possible to achieve this at present.Therefore, as an interim measure, in view of the widespread use ofequipment described in this part of ISO 5269, it has been decided toprovide agreed guidance on the use of different types of equipment in orderto achieve consistency of results with each method.To avoid creating too many levels of results, the method specified in thispart of ISO 5269 should preferably be used with the PFI mill or Jokro millmethods of laboratory beating according to ISO 5264-2 and ISO 5264-3,respectively. The method specified in ISO 5269-1 (Conventional sheet-former method) should preferably be used with the Valley beater or PFI millmethods of laboratory beating according to ISO 5264-1 [2] and 5264-2,respectively.SIST EN ISO 5269-2:2000
SIST EN ISO 5269-2:2000
INTERNATIONAL STANDARD
© ISOISO 5269-2:1998(E)1Pulps — Preparation of laboratory sheets for physical testing —Part 2:Rapid-Köthen method1
ScopeThis part of ISO 5269 specifies a method, using a Rapid-Köthen sheet former, for the preparation of laboratorysheets of pulp for the purpose of carrying out subsequent physical tests on these sheets in order to assess therelevant properties of the pulp itself.This part of ISO 5269 is applicable to most kinds of pulp. It is not suitable for some pulps with very long fibres, suchas those made from unshortened cotton, flax and similar materials.This method is not suitable for the preparation of laboratory sheets for the determination of diffuse blue reflectancefactor (ISO brightness) in accordance with ISO 3688 [1].2
Normative referencesThe following standards contain provisions which, through reference in this text, constitute provisions of this part ofISO 5269. At the time of publication, the editions indicated were valid. All standards are subject to revision, andparties to agreements based on this part of ISO 5269 are encouraged to investigate the possibility of applying themost recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently validInternational Standards.ISO 187:1990, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure formonitoring the atmosphere and conditioning of samples.ISO 4119:1995, Pulps — Determination of stock concentration.ISO 5263:1995, Pulps — Laboratory wet disintegration.ISO 5264-2:1979, Pulps — Laboratory beating — Part 2: PFI mill method.ISO 5264-3:1979, Pulps — Laboratory beating — Part 3: Jokro mill method.ISO 5269-1:1998, Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-former method.3
PrincipleA circular sheet is formed from a pulp suspension on a wire screen under suction. The sheet is subjected topressure and dried in a dryer, with almost complete prevention of shrinkage, in a specified way with respect to thepressure applied, the suction and the temperature.SIST EN ISO 5269-2:2000
ISO 5269-2:1998(E)© ISO24
Equipment4.1
Rapid-Köthen apparatus, consisting of a sheet former, transfer equipment, one or more dryers andaccessories (see figure 1). The parts of the instrument which come into contact with stock or water shall becorrosion resistant.4.1.1
Sheet former, consisting of a stock container for preparing the pulp suspension, the screen section on whichwet fibre is forwarded, and the suction chamber for drawing off and holding the water after passing through thescreen. The lower part of the stock container, screen section and suction chamber may be sealed off.4.1.1.1
Stock container (see figure 1)The stock container consists of a transparent cylindrical tube (1) with an internal diameter of 200 mm ± 0,5 mm anda capacity of not less than 10 litres. The container is graduated in litres. Around the circumference of the lower partof the stock container are two rows of holes (2), 1,5 mm in diameter, one above the other, connecting radially to acircular cavity (3) round the outside of the cylinder. Each row contains 40 holes. The distance between the screensurface and the lower row of holes is 10 mm, and the space between the lower and upper rows is 7 mm. The lowerrow of holes is drilled horizontally and the upper row is inclined upwards at an angle of 30° towards the centre of thecylinder.The stock container is so constructed that it can be lifted off the screen section. The circular cavity can be filled withwater and compressed air.4.1.1.2
Screen sectionThe screen section, which separates the stock container and the suction chamber, consists of the sheet-formingscreen (4) and the supporting screen (5).The nickel sheet-forming screen gauze is evenly stretched over the ring and can be lifted off from the supportingscreen. The dimensions of the twilled sheet-forming screen gauze are as follows:Number of warp wires:60 wires/cmNumber of weft wires:55 wires/cmWire diameter:0,060 mm to 0,065 mmThe supporting screen gauze is evenly stretched over bars (6) having a width of 2 mm and a height of 30 mmarranged parallel to one another and spaced 10 mm ± 2 mm apart. The two upper edges of each bar are chamferedat an angle of 75° to the horizontal in such a way that a 0,5 mm wide ledge remains as a support for the supportingscreen. The supporting screen shall be exactly horizontally aligned.The dimensions of the supporting screen gauze in simple plain weave, made from phosphor bronze are as follows:Number of warp wires:8 wires/cmNumber of weft wires:7 wires/cmWire diameter:0,35 mm4.1.1.3
Suction chamberThe suction chamber has a capacity of more than 10 litres, and has a water outlet (7) that can be closed. Thesuction chamber can be connected to a vacuum pump by means of a suction tube (8) placed at its axis, andcovered so that it is protected against the infiltration of water. A regulating vent limits the maximum suction in thesuction chamber to 27 kPa.SIST EN ISO 5269-2:2000
© ISOISO 5269-2:1998(E)3Key
1Transparent cylindrical tube11Rubber membrane21Suction chamber
2Rows of holes12Perforated, flat plate22Hot water
3Circular cavity13Phosphor bronze screen gauzes23Dryer
4Sheet-forming screen14Cooling body24Heating chamber
5Supporting screen15Sheet former25Steam chamber
6Bars16Air26Tap water
7Water outlet17Water27Vacuum pump
8Suction tube18Stock container28Laboratory sheet
9Carrier boards19Water or air10Paper cover sheets20Screen sectionFigure 1 — Rapid-Köthen sheet-forming and drying instrumentSIST EN ISO 5269-2:2000
ISO 5269-2:1998(E)© ISO44.1.2
Transfer equipment for the wet fibre sheet, consisting of a couch roll, carrier boards and paper coversheets.4.1.2.1
Couch rollThe couch roll has a diameter of 120 mm to 130 mm, a length of 240 mm to 260 mm and a mass of 3,0 kg ± 0,2 kg.The outer surface shall be resilient and is preferably made of felt about 20 mm thick
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