EN ISO 7765-1:2004

SLOVENSKI STANDARD
01-oktober-2004
Polimerni materiali – Filmi in folije – Ugotavljanje odpornosti proti udarcu z
metodo prostega pada žela - 1. del: Metoda stopnjevanja (ISO 7765-1:1998)
Plastics film and sheeting - Determination of impact resistance by the free-falling dart
method - Part 1: Staircase methods (ISO 7765-1:1988)
Kunststofffolien und -bahnen - Bestimmung der Schlagfestigkeit nach dem
Fallhammerverfahren - Teil 1: Eingrenzungsverfahren (ISO 7765-1:1988)
Film et feuille de plastiques - Détermination de la résistance au choc par la méthode par
chute libre de projectile - Partie 1: Méthodes dites de "l'escalier" (ISO 7765-1:1988)
Ta slovenski standard je istoveten z: EN ISO 7765-1:2004
ICS:
83.140.10 Filmi in folije Films and sheets
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 7765-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2004
ICS 83.140.10
English version
Plastics film and sheeting - Determination of impact resistance
by the free-falling dart method - Part 1: Staircase methods (ISO
7765-1:1988)
Film et feuille de plastiques - Détermination de la
résistance au choc par la méthode par chute libre de
projectile - Partie 1: Méthodes dites de “l'escalier” (ISO
7765-1:1988)
This European Standard was approved by CEN on 21 June 2004.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7765-1:2004: E
worldwide for CEN national Members.

Foreword
The text of ISO 7765-1:1988 has been prepared by Technical Committee ISO/TC 61 "Plastics”
of the International Organization for Standardization (ISO) and has been taken over as EN ISO
7765-1:2004 by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held by
IBN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by January 2005, and conflicting national
standards shall be withdrawn at the latest by January 2005.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 7765-1:1988 has been approved by CEN as EN ISO 7765-1:2004 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).

Annex ZA
(normative)
Normative references to international publications
with their relevant European publications

This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).

NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.

Publication Year Title EN Year

ISO 291 1997 Plastics - Standard atmospheres for EN ISO 291 1997
conditioning and testing
IS0
INTERNATIONAL STANDARD
7765-l
First edition
1988-12-15
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXAYHAPOfiHAfl OPTAHM3AqMfl IlO CTAH~APTM3A~MM
Plastics film and sheeting - Determination of impact
resistance by the free-falling dart method
Part 1:
Staircase methods
Film et feuille de plastiques - D&termination de la rkistance au choc par la m&hode
par chute libre de projectile
Partie 7 : Mkthodes dites de ol’escalier~~
Reference number
IS0 7765-l : 1988 (E)
IS077651 9988 (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
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 7765-l was prepared by Technical Committee ISO/TC 61,
Plastics.
IS0 7765 consists of the following parts, under the general title Plastics film and
free-falling dart method :
sheeting - Determina tion of impact resistance by the
-
Part 1: Staircase methods
-
Part 2: Instrumented puncture test
0 International Organization for Standardization, 1988
Printed in Switzerland
ISO7765-1 : 1988 (E)
INTERNATIONAL STANDARD
Plastics film and sheeting - Determination of impact
resistance by the free-falling dart method
Part 1 I
Staircase methods
IS0 4591 : I979, Plastics - Film and sheeting - Determination
1 Scope
of average thickness of a sample and average thickness
and yield of a roll by gravimetric techniques (gravimetric
1 .I This part of IS0 7765 specifies methods for the deter-
thicknessl.
mination of the energy that causes plastics film and sheet less
than I mm in thickness to fail under specified conditions of im-
IS0 4593 : I979, Plastics - Film and sheeting - Determination
pact of a free-falling dart from a specified height that would
of thickness by mechanical scanning.
result in failure of 50 % of the specimens tested.
3 Significance
1.2 Two methods of test are described.
3.1 Methods A and B are used to establish the mass of the
1.2.1 Method A employs a dart with a 38 mm + I mm
dart causing 50 % of the specimens to fail under the conditions
diameter hemispherical head dropped from a height of
specified. Data obtained by one method cannot be compared
066 m + 0,OI m. This method may be used for materials
directly with those from the other method, nor with those
whose impact resistance requires masses of about 0,05 kg to
obtained from tests employing different conditions of missile
about 2 kg to fracture them.
velocity, missile impinging surface diameter, effective speci-
men diameter, and specimen thickness. The results obtained
with particular values of these test variables are highly depen-
1.2.2 Method B employs a dart with a 50 mm + I mm
dent on the method of fabrication of the film or sheeting.
diameter hemispherical head dropped from a height of
I ,50 m + 0,OI m. Its range of applicability is from about 0,3 kg
3.2 The results obtained by methods A and B are greatly in-
to about 2 kg.
fluenced by the quality of the material under test. The con-
fidence limits of data obtained by this procedure can, therefore,
vary significantly, depending on the sample quality, uniformity
I.3 The measurement technique is the staircase method. A
of gauge, die marks, contaminants, etc.
uniform missile mass increment is employed during testing and
the missile weight is decreased or increased by the uniform in-
crement after test of each specimen, depending upon the result
3.3 Methods A and B have been found useful for specifi-
(failure or no failure) observed for the specimen.
cation purposes. Correlation between test results and field per-
formance can usually be established.
3.4 The impact resistance of film and sheeting, while partly
2 Normative references dependent on thickness, has no simple correlation with sample
thickness. Hence, impact values cannot be normalized over a
The following standards contain provisions which, through range of thicknesses without producing misleading data as to
the actual impact resistance of the material. Data from these
reference in this text, constitute provisions of this part of
IS0 7765. At the time of publication, the editions indicated methods are comparable only for sample sets that vary by no
were valid. All standards are subject to revision, and parties to more than + IO % from the nominal or average thickness of
agreements based on this part of IS0 7765 are encouraged to the specimens tested.
investigate the possibility of applying the most recent editions
of the standards listed below. Members of IEC and IS0 main-
tain registers of currently valid International Standards. 4 Definitions
For the purposes of this part of IS0 7765, the following defini-
IS0 291 : 1977, Plastics - Standard atmospheres for con-
ditioning and testing. tions apply.
IsO7765-1:1988 E)
5.5 Cushioning and shielding devices, to protect person-
4.1 impact failure mass: The missile mass, estimated
nel and to avoid damaging the impinging surface of the dart.
statistically, at which 50 % of the specimens would fail in the
specified test.
5.6 Collar, with inside diameter of approximately 7 mm and
4.2 missile mass: The total of the masses of the dart, the in- with set screw for securing collar to dart shaft.
cremental weights attached and the locking collar.
Darts, for methods A and B, with hemispherical heads,
5.7
each fitted with a 6,5 mm + 0,I mm diameter shaft at least
5 Apparatus
I I5 mm long to accommodate removable incremental weights.
The mass of each dart shall be known to an accuracy of
The apparatus shall be constructed essentially as shown in
+ 0,5 %. Dart head surfaces shall be free of nicks, scratches,
figure I, using the following components:
or other irregularities. The shaft shall be attached to the centre
of the flat surface of the head with its longitudinal axis perpen-
5.1 Specimen clamp, consisting of a two-piece annular
dicular to the surface. The shaft shall be made of material that
clamp having an inside diameter of I25 mm + 2 mm.
...