SIST EN ISO 9073-7:1999
(Main)Textiles - Test methods for nonwovens - Part 7: Determination of bending length (ISO 9073-7:1995)
Textiles - Test methods for nonwovens - Part 7: Determination of bending length (ISO 9073-7:1995)
Specifies a method for the determination of the bending length of nonwovens. Gives an equation for calculating the flexural rigity of the fabric from the bending length. Does not apply to composites and laminates.
Textilien - Prüfverfahren für Vliesstoffe - Teil 7: Bestimmung der Biegelänge (ISO 9073-7:1995)
Dieser Teil von ISO 9073 legt ein Verfahren für die Bestimmung der Biegelänge eines Flächengebildes aus Vliesstoff fest. Für die Berechnung der Biegesteifigkeit des Vliesstoffes aus der Biegelänge wird eine Gleichung angegeben. Das Verfahren ist nicht anwendbar auf zusammengesetzte Materialien (Composites oder Laminate), in denen ein Naturdrall/Naturtwist auftreten kann. Anmerkung 1: Diese Internationale Norm beschreibt ein Prüfverfahren speziell für Vliesstoffe.
Textiles - Méthodes d'essai pour nontissés - Partie 7: Détermination de la longueur de flexion (ISO 9073-7:1995)
La CEI 60684-3-282:2010 donne les exigences relatives à deux types de gaines thermorétractables, en polyoléfine, à contrôle de fatigue, non ignifugées, de rapport de rétreint nominal jusqu'à 3:1. Ces gaines se sont révélées être adaptées à une utilisation à des températures jusqu'à 100 °C.
- Type A: Paroi moyenne - Diamètre intérieur type jusqu'à 65,0 mm
- Type B: Paroi épaisse - Diamètre intérieur type jusqu'à 95,0 mm
Tekstilije - Metode za preskušanje vlaknovin - 7. del: Ugotavljanje upogibne dolžine (ISO 9073-7:1995)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-1999
Tekstilije - Metode za preskušanje vlaknovin - 7. del: Ugotavljanje upogibne
dolžine (ISO 9073-7:1995)
Textiles - Test methods for nonwovens - Part 7: Determination of bending length (ISO
9073-7:1995)
Textilien - Prüfverfahren für Vliesstoffe - Teil 7: Bestimmung der Biegelänge (ISO 9073-
7:1995)
Textiles - Méthodes d'essai pour nontissés - Partie 7: Détermination de la longueur de
flexion (ISO 9073-7:1995)
Ta slovenski standard je istoveten z: EN ISO 9073-7:1998
ICS:
59.080.30 Tkanine Textile fabrics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
Is0
INTERNATIONAL
9073-7
STANDARD
First edition
1995-12-15
Textiles - Test methods for
nonwovens -
Part 7:
Determination of bending length
Textiles - Mkthodes d’essai pour nontissb -
Partie 7: Dktermina tion de la longueur de flexion
Reference number
IS0 9073-7: 1995(E)
IS0 9073-7: 1995(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
(I EC) 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 9073-7 was prepared by Technical Committee
lSO/TC 38, Textiles.
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
- Part 7: Determination of bending length
- Part 8: Determination of liquid strike-through time (simulated urine)
- Part 9: Determination of drape coefficient
Annex A of this part of IS0 9073 is for information only.
0 IS0 1995
All rights reserved. Unless otherwise specified, 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
IS0 9073-7:1995(E)
INTERNATIONAL STANDARD 0 ISO
Textiles - Test methods for nonwovens -
Part 7:
Determination of bending length
IS0 9073-I :I 989, Textiles - Test methods for non-
1 Scope
Part 1: Determination of mass per unit
wovens -
area.
This part of IS0 9073 specifies a method for deter-
mining the bending length of a nonwoven fabric. An
equation is given for calculating the flexural rigidity of 3 Definitions
the fabric from the bending length.
For the purposes of this part of IS0 9073, the follow-
The method is not applicable to combination-type ing definitions apply.
materials (composites or laminates) in which there
can be a natural twist. 3.1 bending length: Length of a rectangular strip
of fabric, fixed at one end and free at the other, that
NOTE 1 This International Standard describes a test
will bend under its own weight to an angle of 7,l'.
method specific to nonwovens. Other International Stan-
dards applicable to textile, paper, plastics, rubber or other
3.2 flexural rigidity: Ratio of small changes in
materials can also be applied to test certain nonwoven
bending moment per unit width of the material to
characteristics.
corresponding small changes in curvature.
NOTE 2 Flexural rigidity can be calculated from the
bending length.
2 Normative references
4 Principle
The following standards contain provisions which,
through reference in this text, constitute provisions A rectangular strip of fabric is supported on a hori-
of this part of IS0 9073. At the time of publication, the
zontal platform with the long axis of the strip parallel
editions indicated were valid. All standards are subject
to the long axis of the platform. The strip is advanced
to revision, and parties to agreements based on this in the direction of its length so that an increasing part
part of IS0 9073 are encouraged to investigate the overhangs the platform and bends down under its
possibility of applying the most recent editions of the own weight. The overhang is free at one end, and
standards indicated below. Members of IEC and IS0 fixed at the other from the pressure applied by a slide
maintain registers of currently valid International
on the part of the test piece still on the platform.
Standards.
When the leading edge of the test piece has reached
a plane passing through the edge of the platform and
IS0 139: 1973, Textiles - Standard atmospheres for
inclined at an angle of 41,5” below the horizontal, the
conditioning and testing.
overhanging length will equal twice the bending
length of the test piece (see annex A), and thus the
IS0 186: 1994, Paper and board - Sampling to deter-
bending length can be calculated.
mine average quality.
IS0 9073-7: 1995(E)
0 IS0
5.3 Steel rule, (25 + 1) mm, length (350 + 1) mm
5 Apparatus
of width and mass (250 + 10) g, accurately gradu-
ated in millimetres, and with a rubber-covered under-
A suitable apparatus is shown in figure 1.
side.
NOTE 4 A rule made of steel plate 3,5 mm thick will have
the correct mass.
5.1 Level table.
6 Sampling
Carry out sampling in accordance with IS0 186.
5.2 Platform, of width (40 + 2) mm and length
-
(200 + 2) mm, supported at a height of at least
150 mm above the surface of the table (5.1). Each
...
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