EN 21974:1994

Paper - Determination of tearing resistance (Elmendorf method) (ISO 1974:1990)

It can also be used for light boards if the tearing resistance is within the range of the instrument, does not apply to corrugated fibreboard and is not suitable for determining the cross-direction tearing resistance of highly directional paper or board.

Papier - Durchreißversuch (Elmendorf Methode) (ISO 1974:1990)

Diese Internationale Norm beschreibt ein Verfahren für den Durchreissversuch von Papier. Sie kann auch für leichte Pappe angewandt werden, sofern die Durchreisssfestigkeit innerhalb des Messbereiches des Gerätes liegt. Diese Internationale Norm ist nicht anwendbar bei Wellpappe, aber sie kann bei den Komponenten dieser Pappe angewandt werden. Sie kann nicht zur Bestimmung der Durchreissfestigkeit in Querrichtung von hochrichtungsabhängigem Papier oder Pappe angewandt werden.

Papier - Détermination de la résistance au déchirement (Méthode Elmendorf) (ISO 1974:1990)

La présente Norme internationale prescrit une méthode pour la détermination de la résistance au déchirement du papier (résistance au déchirement amorcé). Elle peut aussi être utilisée pour le carton de faible grammage, si la résistance au déchirement se trouve dans le domaine d'utilisation de l'appareil. La présente Norme internationale n'est pas applicable aux cartons ondulés mais elle peut s'appliquer aux papiers pour ondulés. Elle ne convient pas pour déterminer la résistance au déchirement dans le sens travers des papiers (ou des cartons) à structure fortement orientée.

Papir - Določevanje raztržne odpornosti (Elmendorfova metoda) (ISO 1974:1990)

General Information

• Status: Withdrawn
• Publication Date: 29-Jun-1994
• Withdrawal Date: 30-Apr-2012
• ICS: 85.060 - Paper and board
• Technical Committee: CEN/TC 172 - Pulp, paper and board
• Drafting Committee: CEN/TC 172 - Pulp, paper and board
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-May-2012
• Completion Date: 01-May-2012
• Ref Project: SIST EN 21974:2000 - Paper - Determination of tearing resistance (Elmendorf method) (ISO 1974:1990)

Relations

• Replaced By: EN ISO 1974:2012 - Paper - Determination of tearing resistance - Elmendorf method (ISO 1974:2012)
• Effective Date: 16-May-2012

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Papier - Durchreißversuch (Elmendorf Methode) (ISO 1974:1990)Papier - Détermination de la résistance au déchirement (Méthode Elmendorf) (ISO 1974:1990)Paper - Determination of tearing resistance (Elmendorf method) (ISO 1974:1990)85.060Papir, karton in lepenkaPaper and boardICS:Ta slovenski standard je istoveten z:EN 21974:1994SIST EN 21974:2000en01-april-2000SIST EN 21974:2000SLOVENSKI
STANDARD



SIST EN 21974:2000



SIST EN 21974:2000



SIST EN 21974:2000



SIST EN 21974:2000



SIST EN 21974:2000



INTERNATIONAL STANDARD IS0 1974 Third edition 1990-02-O 1 ~- p-.-------- Paper - Determination of tearing resistance (Elmendorf method) Papier - D6termination de la rbsistance au dbchirement (MHhode Elmendorf) Reference number --- IS0 1974: 1990(E) SIST EN 21974:2000



IS0 1974:1990(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 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 approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 1974 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps. This third edition cancels and replaces the second edition (IS0 1974:1985), of which this constitutes a complete revision. In particular, this edition deals only with single tear testers, all references to double tear instruments having been deleted, and allows for the use of digital read-out variants. An alternative calibration procedure has been in- cluded. Annexes A and B provide details of the apparatus and calibration pro- cedures respectively. Annex C refers to units used with older apparatus. Annexes A and B Annex C is for info form an in rmation onl tegral part of this Y- International Standard. 0 IS0 1990 All rights reserved. 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 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii SIST EN 21974:2000



INTERNATIONAL STANDARD IS0 1974:1990(E) Paper - Determination of tearing resistance (Elmendorf met hod) 1 Scope This International Standard specifies a method for determining the tearing resistance of paper. It can also be used for light boards if the tearing resistance is within the range of the instrument. This International Standard does not apply to corru- gated fibreboard, but it may be applied to the com- ponents of such boards. It is not suitable for determining the cross-direction tearing resistance of highly directional paper (or board). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All stand- at-ds are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- dicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 186:1985, Paper and board - Sampling to deter- mine average quality. IS0 187:1977, Paper and board - Conditioning of samples. IS0 536:1976, Paper and board - Determination of grammage. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 tearing resistance: The mean force required to continue the tearing started by an initial cut in a single sheet of paper (or board). If the initial cut is in the machine direction, the result is given as machine-direction tearing resistance; similarly, if the initial cut is in the cross direction, the result is given as cross-direction tearing resistance. The result is expressed in millinewtons (mN). 3.2 tear index: The tearing resistance of the paper (or board) divided by its grammage. The result is expressed in millinewton square metres per gram (mN.mVg). 4 Principle A test piece of superimposed sheets (normally four), with a specified precut slit, is torn through a fixed di
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