EN ISO 9073-4:1997

SLOVENSKI STANDARD
01-marec-1999
Tekstilije - Metode preskušanja vlaknovin - 4. del: Ugotavljanje nadaljnje trgalne
trdnosti (ISO 9073-4:1997)
Textiles - Test methods for nonwovens - Part 4: Determination of tear resistance (ISO
9073-4:1997)
Textilien - Prüfverfahren für Vliesstoffe - Teil 4: Bestimmung der Weiterreißfestigkeit (ISO
9073-4:1997)
Textiles - Méthodes d'essai pour non-tissés - Partie 4: Détermination de la résistance a
la déchirure (ISO 9073-4:1997)
Ta slovenski standard je istoveten z: EN ISO 9073-4:1997
ICS:
59.080.30 Tkanine Textile fabrics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
IS0
STANDARD
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)
IS0 9073-4: 1997(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, 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 International 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, Textiles.
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: 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
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ii
@ IS0
IS0 9073-4: 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 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 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 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.
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INTERNATIONAL STANDARD @ IS0 IS0 9073-4: 1997(E)
Textiles - Test 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, 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 standards indicated below. Members of IEC and IS0 maintain registers of curren
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