ISO-9073-4-1997.pdf
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1、INTERNATIONAL STANDARD IS0 9073-4 Second edition 1997-07- 15 Textiles - Test methods for nonwovens - Part 4: Determination of tear resistance Textiles - Mkthodes d essai pour nontissks - Parfie 4: Dgtermination de la ksistance 2 la dkhirure Reference number IS0 9073-4: 1997(E) Copyright Internationa
2、l Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 23:55:29 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 9073-4: 1997(E) Foreword IS0 (the international Organization for
3、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 r
4、ight to be represented on that committee. International organizations, governmental 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 Inte
5、rnational 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. International Standard IS0 9073-4 was prepared by Technical Committee ISOmC 38, Tex
6、tiles. This second edition replaces and cancels the first edition (IS0 9073-4:1989), clause 3, figure 1, subclause 6.2, subclause 7.2 and clause 8 of which have been technically revised. IS0 9073 consists of the following parts, under the general title Textiles - Test methods for nonwovens: Part 1:
7、Determination of mass per unit area - Part 2: Determination of thickness - Part 3: Determination of tensile strength and elongation - Part 4: Determination of tear resistance 0 IS0 1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any
8、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 Internet central iso.ch x.400 c=ch; a=400net; p=iso; o=isocs; s=cen
9、tral Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 23:55:29 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 IS0 9073-4:
10、1997(E) Introduction Although nonwovens are classified within the textile industry, it should be recognized that nonwovens technologically share characteristics not only with textile products but also with paper and/or plastic products. There is no current International Standard for determination of
11、 tear strength of textiles, but work is proceeding on determination of tear resistance (falling pendulum method, IS0 92903990, TexMes - Woven fabrics - Deter- mination of tear resistance by falling pendulum method) and determination of tear resistance (tongue-tear method). This method, which uses a
12、trapezoidal tear, is a tension test in which the strength is determined primarily by the fibres of the composite structure and their bonding or interlocking. It is useful for estimating relative ease of tearing of nonwovens. In nonwovens, the mechanism of failure is affected by interfibre frictional
13、 forces and differs from that found for woven fabrics, where failure is essentially that of sequential rupture of yarns in tension. There is evidence that this test may not be applicable to nonwovens above a certain mass per unit area and stiffness. Additional work on this problem is in progress. Co
14、pyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 23:55:29 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright Inte
15、rnational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 23:55:29 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 IS0 9073-4: 1997(E) Textiles - Tes
16、t methods for nonwovens - Part 4: Determination of tear resistance 1 Scope This part of IS0 9073 specifies a method for the determination of tear resistance of nonwovens by the trapezoid method. 2 Normative references The following standards contain provisions which, through reference in this text,
17、constitute provisions of this part of IS0 9073. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 9073 are encouraged to investigate the possibility of applying the most recent editions of the sta
18、ndards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 139: 1973, Texti/es - Standard atmospheres for conditioning and testing. IS0 186:1994, Paper and board - Sampling to determine average quality. 3 Principle Marking of a trapezoid on a te
19、st piece. Clamping of the non-parallel sides of the trapezoid in the jaws of a tensile testing machine. Application of a continuously increasing extension to the test piece in such a way that a tear propagates across its width. Determination of the average maximum tear resistance in newtons. 4 Appar
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