INTERNATIONAL IS0

STANDARD 9073-I
First edition
1989-07-01

Textiles - Test methods for nonwovens -

Part I :
Determination of mass per unit area

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Textiles - M&odes d essal’ pour nontissks -

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Partie 7 : De’termina tion de la masse sutiacique

ISO 9073-1:1989
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9ad7c19255d2/iso-9073-1-1989

Reference number
IS0 9073-l : 1989 (El
lSO9073-1 :1989 (El

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
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the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.

International Standard
(standards.iteh.ai)
IS0 9073-l was prepared by Technical Committee ISO/TC 38,
Texties.
ISO 9073-1:1989
IS0 9073 consists of the https://standards.iteh.ai/catalog/standards/sist/93d564d8-4adf-4409-9187-
following w-6 under the general title Textiles - Test
methods for nonwovens : 9ad7c19255d2/iso-9073-1-1989
- Part 1: 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 1989
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
 IS0 9073-l A989 (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 an existing international textile test,
IS0 3801. However, in order to meet the specific needs of nonwovens, alternative
requirements to those listed in IS0 3801 are specified in this part of IS0 9073. These
are

a) a different sampling procedure;

b) an alternative specification for dimensions of test piece;

cl a greater accuracy for the balance.

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INTERNATIONAL STANDARD IS0 9073-I : 1989 (E)

Textiles - Test methods for nonwovens -

Part 1 I
Determination of mass per unit area

1 Scope iTeh STANDARD 000 PREVIEW

mm*.
which cuts a test
4.1.1
50
Die, piece of an area of at least

of mass per unit area of nonwovens.

(standards.iteh.ai)
This part of IS0 9073 specifies a method for the determination
4.1.2 Template, with an area of at least 50 000 mm* (e.g.
250
ISO 9073-1:1989 mm x 200 mm) and a razor blade.

2 Normative references
https://standards.iteh.ai/catalog/standards/sist/93d564d8-4adf-4409-9187-
4.1.3 Steel rule, accurately graduated
9ad7c19255d2/iso-9073-1-1989 in millimetres, and a
razor blade.
The following standards contain provisions which, through
reference in this text, constitute provisions of this part of
IS0 9073. At the time of publication, the editions indicated 4.2 Balance, capable of determining the mass of a test piece
were valid. All standards are subject to revision, and parties to to an accuracy of + 0,l % of the determined mass.
agreements based on this part of IS0 9073 are encouraged to
investigate the possibility of applying the most recent editions
of the standards listed below. Members of IEC and IS0 main- 5 Sampling
tain registers of currently valid International Standards.
Carry out sampling in accordance with IS0 186.
IS0 139 : 1973, Textiles - Standard atmospheres for con-
ditioning and testing. NOTES

1 The optimum sample size will vary with different nonwovens and
IS0 186 : 1985, Paper and board - Sampling to determine should be agreed between purchaser and vendor. The size should
average quality. preferably not be smaller than the size specified in 4.1 due to
anisotropy of various nonwovens.
IS0 3801 : 1977, Textiles - Woven fabrics - Determination of
2 Attention is drawn to the fact that with nonwovens, sampling error
mass per unit length and mass per unit area. may be greater than the testing error.

3 This method of sampling recognizes and makes provisions for

“anisotropy” (differences in properties along various directions, prin-
3 Principle cipally machine and cross direction) in the final specimens. However,
these specimens are random representatives of the material and in some
Measurement of the area and mass of a test piece and calcu- cases it may be desirable to investigate systematic variations of proper-
lation of its mass per unit area in grams per square metre. ties (including anisotropy), for example across the width, or in certain
positions along the length of a given reel. In all such cases, special pro-
visions should be agreed between purchaser and vendor and recorded in
the test report. A procedure for more detailed examination of variability
4 Apparatus
within a given batch of material is available in TAPPI T 1I-05-74 and may
be found helpful. This publication may be obtained from : The Technical
4.1 Apparatus for cutting the test pieces, chosen from Association of Pulp and Paper Industries, 1 Dunwoody Park, Atlanta,
among the following. Georgia 30338, USA.

1
IS0 9073-l : 1989 (E)

6 Preparation and conditioning of test pieces 8 Expression of results

Calculate the mass per unit area of each test piece, the mean
6.1 From each sample, cut at least three test pieces, each of
value in grams per square metre and, if required, the coefficient
an area of at least 50 000 mm2, using either the die, or the
of variation, as a percentage.
template and a sharp razor blade.

If there is insufficient material to cut test pieces of the specified

size, cut the largest rectangle possible and measure its area
9 Test report
using the steel rule.
The test report shall include the following information :
NOTE - Although it is not recommended, the interested parties may
a) a reference to this part of IS0 9073;
agree on the use of a smaller test area, and this fact should be men-
tioned in the test report [clause 9 g)].
b) all necessary for the identification of the
material
If the coefficient of variation is required, use a minimum of five
test pieces. c) the test results;

6.2 Condition the test pieces as specified in IS0 139. d) the mean value in grams per square metre;

e) if required, the coefficient of variation, as a percentage;

7 Procedure f) the conditioning atmosphere used;

Determine the mass of each piece in the standard atmosphere g) any unusual features noted during the testing, or devi-
for testing (see IS0 139) using the balance (4.2). ations from the standard procedure.

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ISO 9073-1:1989
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IS0 9073-l : 1989 (E)

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ISO 9073-1:1989
https://standards.iteh.ai/catalog/standards/sist/93d564d8-4adf-4409-9187-
9ad7c19255d2/iso-9073-1-1989

UDC 677.076.4 : 677.01725 : 531.751

Descriptors : textiles, fabrics, nonwoven fabrics, tests, density measurement.

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