EN ISO 7965-2:1996

SLOVENSKI STANDARD
01-oktober-1998
9UHþH3UHVNXVVSURVWLPSDGRPGHO9UHþHL]WHUPRSODVWLþQHIROLMH,62

Sacks - Drop test - Part 2: Sacks made from thermoplastic flexible film (ISO 7965-
2:1993)
Säcke - Stoßprüfung im freien Fall - Teil 2: Säcke aus thermoplastischen Kunststoff-
Folien (ISO 7965-2:1993)
Essais de chute - Partie 2: Sacs faits d'un film thermoplastique flexible (ISO 7965-
2:1993)
Ta slovenski standard je istoveten z: EN ISO 7965-2:1996
ICS:
55.080 9UHþH9UHþNH Sacks. Bags
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL
ISO
STANDARD
7965-2
First edition
1993-12-15
- Drop test -
Sacks
Part 2:
Sacks made from thermoplastic flexible film
Essais de chute -
Partie 2: Sacs faits d’un film thermoplastique flexible
Reference number
ISO 7965-2:1993(E)
ISO 7965=2:1993(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch 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. ISO
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 ISO 7965-2 was prepared by Technical Committee
lSO/TC 122, Packaging, Subcommittee SC 2, Sacks.
ISO 7965 consists of the following Parts, under the general title
Sacks - Drop test:
- Part 1: Paper Sacks
- Part 2: Sacks made from thermoplastic flexible film
Annexes A, B and C of this patt of ISO 7965 are for information only.
0 ISO 1993
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l Zl 1 Geneve 20 l Switzerland
Printed in Switzerland
l ii
ISO 7965-2: 1993(E)
INTERNATIONAL STANDARD 0 ISO
Sacks - Drop test -
Part 2:
Sacks made from thermoplastic flexible filtm
3 Principle
1 Scope
This part of ISO 7965 specifies a method of vertical
The filled sack is raised above a rigid surface and re-
impact testing on a filled sack made from thermo-
leased to Strike this surface after a free fall, the at-
plastic flexible film by dropping. lt may be performed
mospheric conditions, the height of the drop and the
either as a Single test to investigate the effects of
Position of the package being set in advance.
vertical impact or as a part of a sequence of tests
designed to measure the ability of a sack to withstand
4 Apparatus
a distribution System that includes a vertical impact
hazard.
The apparatus necessary to carry out the dro.p test
shall include the following (examples are shown in
This part of ISO 7965 specifies the testing procedure
annex A):
and how the results of tests should be presented. lt
is based on ISO 2248’1, but is specifically related to
Sacks made from thermoplastic flexible film.
4.1 Lifting arrangement, which will not darnage
the sack during either lifting or release.
2 Normative references
4.2 Means of holding the sack Prior to release in
The following Standards contain provisions which,
its predetermined Position.
through reference in this text, constitute provisions
of this part of ISO 7965. At the time of publication, the
The differente in behaviour of a sack suspended from
editions indicated were valid. All Standards are subject
the top or supported underneath in a butt drop tan
to revision, and Parties to agreements based on this
be significant, and the method of holding the sack
part of ISO 7965 are encouraged to investigate the
before dropping shall be included in the test report.
possibility of applying the most recent editions of the
Standards indicated below. Members of IEC and ISO
4.3 Release mechanism, to release the sack in
maintain registers of currently valid International
such a way that its fall is not obstructed by any part
Standards.
of the apparatus before striking the impact surface
(4.4).
ISO 2233:1986, Packaging - Complete, filled trans-
port packages -
Conditioning for testing.
4.4 Impact surface, horizontal and flat, massive
enough to be immovable and rigid enough to be
ISO 7023:1983, Packaging - Sacks - Method of
nondeformable under test conditions.
sampling empty Sacks for testing.
1) ISO 2248:1985, Packaging - Complete, filled transport packages - Vertical impact test by dropping.
Q ISO
ISO 7965-2: 19&3( E)
In normal circumstances the impact surface provided + 2 % of the predetermined drop height, defined as
the distance between the lowest Point of the sack at
should be:
the time of release and the nearest Point of the im-
- of one piece, with a mass at least 50 times that
patt surface.
of the heaviest sack to be tested;
The sack shall be released from its predetermined
Position within the following tolerantes:
- flat, such that no two Points on its sutface differ
in level by more than 2 mm;
a) for drops on any side, the impacting surface of the
sack shall be parallel, to within 2”, to the impact
- rigid, such that it will not be deformed by more
surface;
than 0,l mm when an area of 100 mm* is loaded
statically with 10 kg anywhere on the surface;
b) the velocity of the sack at impact shall be within
& 1 % of that which would be achieved by a free
- sufficiently large to ensure that the sack falls en-
fall .
tirely upon the surface.
A plastic film may be used on the impact surface un-
7.2.2 Dropping procedure
der the sack in Order not to darnage the sack while
moving it.
NOTE 1 The designation of the various surfaces of a filled
sack is given in annex B.
5 Sampling
7.2.2.1 Flat dropping
Sampling shall be carried out in accordance with
Drop successive Sacks alternately on the face side (1)
ISO 7023.
and on the back side (3), so that the first sack is
dropped on the face side until it breaks and the sec-
6 Conditioning
ond on the back side until it breaks, and so on.
The filled and closed Sacks shall be conditioned in
7.2.2.2 Side dropping
accordance with ISO 2233, using one of the desig-
nated conditioning atmospheres.
Drop successive Sacks alternately on the right side (2)
and on the left side (4), so that the first sack is
dropped on the right side (2) until it breaks and the
7 Procedure
second on the left side (4) until it breaks, and so on.
The tests shall be carried out in the same atmospheric
7.2.2.3 Butt dropping
conditions as used for conditioning (see clause
...