ISO 1924:1976
(Main)Paper and board — Determination of tensile strength
Paper and board — Determination of tensile strength
Papiers et cartons — Détermination de la résistance à la traction
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Standards Content (Sample)
INTERNATIONAL STANDARD 1924
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INTERNATIONAL ORGANIZATION FOR STANDARDIZATION *MEXi3YHAPOllHAI OPrAHH3AUHR no CTAHlIAPTH3AUHH .ORGANISATION INTERNATIONALE DE NORMALISATION
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Paper and board - Determination of tensile strength
Papier et carton - Determination de la résistance a la traction
Second edition - 1976-06-1 5
UDC 676.017.42 : 539.412 Ref. No. IS0 1924-1976 (E)
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Descriptors : papers, paperboards, mechanical tests, tension tests, determination, tensile strength
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Price based on 3 pages
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FOREWORD
is0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 Member Bodies). The work of developing
is carried out through IS0 Technical Committees. Every
International Standards
Member Body interested in a subject for which a Technical Committee has been set
up 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.
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.
Prior to 1972, the results of the work of the Technical Committees were published
as IS0 Recommendations; those documents have subsequently been transformed
into International Standards. As part of that process, in 1974 Technical Committee
ISO/TC 6, Paper board and pulps, reviewed IS0 Recommendation R 1924-1 971
and found it suitable for transformation. International Standard IS0 1924-1974
therefore replaced IS0 Recommendation R 1924-1971.
IS0 Recommendation R 1924-1971 had been approved by the member Bodies of
the following countries :
Greece Sweden
Australia
India Switzerland
Belgium
Israel Thailand
Canada
Netherlands Turkey
Czechoslovakia
Norway United Kingdom
Egypt, Arab Rep. of
Portugal U.S.S. R.
Finland
Romania
France
Germany South Africa, Rep. of
The Member Body of the following country had expressed disapproval of the
Recommendation on technical grounds :
U.S.A.
The Member Body of the following country had disapproved the transformation of
ISO/R 1924 into an International Standard :
Sweden
IS0 1924-1976, the second edition of this International Standard, contains the
modifications which were circulated in the form of an amendement, to the Member
Bodies in March 1975.
This amendment has been approved by the Member Bodies of the following
countries :
Australia India Romania
Belgium I ran South Africa, Rep. of
Canada Ireland Sweden
Czechoslovakia Italy Switzerland
Finland Mexico Turkey
France Netherlands United Kingdom
Germany New Zealand U.S.A.
Hungary Norway
The Member Body of the following country expressed disapproval of the
amendment :
Bulgaria
This second edition cancels and replaces IS0 1924-1974.
O International Organization for Standardization, 1976 0
Printed in Switzerland
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INTERNATIONAL STANDARD
IS0 1924-1976 (E)
Paper and board - Determination of tensile strength
1 SCOPE AND FIELD OF APPLICATION 5 APPARATUS
This International Standard specifies a method for Any system may be used which is capable of acting on the
test piece at the defined rate and of permitting the tensile
measuring the tensile strength of paper and board.
force at the moment of failure to be read to an accuracy
is
The procedure described in this International Standard
of 1 %.
applicable, within the limitation of the instruments used, to
The rate of loading should be so adjustable that failure of
all types of paper and board generally up to a grammage
the test piece can be obtained in a mean time of 20 I5 s2).
(basis weight) of 400 g/m2.
When a substantially inextensible material is gripped
It does not apply to combined corrugated board.
between the clamps and a full scale reading is obtained in
20 s, the rate of loading at any time shall not differ by
This International Standard has been prepared in a form
more than 5 % from the rate of loading 1 s later.
which has a general application and is not limited to any
particular type of tensile testing apparatus.
The centre line of the clamps and of the test piece shall lie
along the same axis, which shall also be parallel to the
direction of the applied force. The clamping surfaces of the
2 REFERENCES
two clamps (flat clamps) or lines of contact (line contact
clamps) shall be in the same plane and so aligned that they
ISO/R 186, Method of sampling paper and board for
hold the test piece in that plane throughout the test.
testing.
The clamps shall grip the test piece firmly along its full
IS0 187, Paper and board - Conditioning of test
width, without slipping, throughout the test.
samples. 1 )
At the start of the test the lines of contact (if line contact
IS0 536, Paper and board - Determination of grammage.
clamps are used) or the inner edges of the contact areas
shall be 180 2 mm apart and shall be perpendicular to the
3 DEFINITIONS
direction of application of the force throughout the test.
L For the purposes of this International Standard, the
following definitions apply :
6 PREPARATION OF THE TEST PIECE
3.1 tensile strength : The limiting resistance of a test piece
of paper or board submitted to a breaking force applied to 6.1 Sampling
each of its ends under the conditions defined in this
Sampling shall be carried out in accordance with
International Standard.
ISO/R 186. The samples shall be conditioned in accordance
with IS0 187, and an equal number of tost pieces for
3.2 breaking length : The calculated limiting length of a
machine direction and cross direction tests shall then be
strip of paper or board of any uniform width, beyond
cut. No creases, obvious flaws or watermarks shall be
which, if such a strip were suspended by one end, it would
included in the test area and test pieces shall not include
break under its own weight.
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