EN ISO 9163:1998

SLOVENSKI STANDARD
SIST EN ISO 9163:2000
01-maj-2000
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Textile glass - Rovings - Manufacture of test specimens and determination of tensile
strength of impregnated rovings (ISO 9163:1996)
Textilglas - Rovings - Herstellung von Probekörpern und Bestimmung der Zugfestigkeit
von imprägnierten Rovings (ISO 9163:1996)
Verre textile - Stratifils - Fabrication d'éprouvettes et essai de traction sur stratifil
imprégné (ISO 9163:1996)
Ta slovenski standard je istoveten z: EN ISO 9163:1998
ICS:
59.100.10 Materiali iz steklenih vlaken Textile glass materials
SIST EN ISO 9163:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9163:2000

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SIST EN ISO 9163:2000

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SIST EN ISO 9163:2000

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SIST EN ISO 9163:2000

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SIST EN ISO 9163:2000

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SIST EN ISO 9163:2000
IS0
INTERNATIONAL
9163
STANDARD
First edition
1996-I O-15
Textile glass - Rovings - Manufacture of
test specimens and determination of
tensile strength of impregnated rovings
- Fabrication d’@rouvettes et essai de traction
Verre textile - Stratifils
s ur s tra tifil imp&gn&
Reference number
IS0 9163:1996(E)

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SIST EN ISO 9163:2000
IS0 9163:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide fed-
eration 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 9163 was prepared by Technical Committee
lSO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement
fibres.
Annex A forms an integral part of this International Standard.
0 IS0 1996
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 Orga nization for Standardi zation
Case Postale 56. CH-121 l Switzerland
IG eneve 20
Printed in Switzerland
II

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SIST EN ISO 9163:2000
@ IS0 IS0 9163:1996(E)
Introduction
There are several methods of measuring the tensile strength of rovings,
using as a specimen either an unimpregnated roving or a roving impreg-
nated with polyester or epoxy resin or with rosin/beeswax mixture.
The results obtained with these different methods are not equivalent.
The test carried out on rovings impregnated with cured resin is considered
the reference method. It allows both the tensile stress at break and the
modulus of elasticity to be measured. This method is the only one which
gives results having a direct correlation with the tensile properties of rein-
forced plastics made from the continuous roving.
The test results obtained with rovings impregnated with rosin/beeswax
are generally IO % to 20 % lower than those obtained with the reference
method. Moreover, the method using rovings impregnated with
rosin/beeswax does not give the tensile modulus of elasticity. On the
other hand, it is simpler than the reference method.
The measurement of the tensile strength using unimpregnated rovings is
even simpler, but the results are lower than those obtained with rovings
impregnated with rosin/beeswax mixture. They also show a greater varia-
tion. On the other hand, this method is a useful one for the user of the
roving to check the quality of the product. This method is not covered by
this International Standard but is described in IS0 3341.
. . .
III

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SIST EN ISO 9163:2000
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SIST EN ISO 9163:2000
INTERNATIONAL STANDARD @ IS0 IS0 9163:1996(E)
Textile glass - Rovings - Manufacture of test specimens and
determination of tensile strength of impregnated rovings
IS0 1172:~*I,
Textile-glass-reinforced p/as tics -
1 Scope
Prepegs, moulding compounds and laminates - De-
termination of the textile-glass and mineral-filter con-
This International Standard specifies two methods for
tent - Calculation method.
the determination of the tensile stress at break of an
impregnated roving:
IS0 1886: 1990, Reinforcement fibres - Sampling
plans applicable to received batches.
- the reference method (roving impregnated with
thermosetting resin);
IS0 1887:1995, Textile glass - Determination of
combustible-matter con tent.
- a rapid method (roving impregnated with
rosin/beeswax).
IS0 1889:
-3), Reinforcement yarns - Determination
of linear density.
The reference method is used to determine, in ad-
dition, the tensile modulus of elasticity of the glass.
IS0 2078:1993, Textile glass - Yarns - Designation.
The methods are applicable to both assembled
IS0 2602:1980, Statistical interpretation of test re-
(multistrand) and direct (multifilament) rovings.
sults - Estimation of the mean - Confidence inter-
val.
IS0 3341: 1984, Textile glass - Yarns - Determi-
nation of breaking force and breaking elongation.
2 Normative references
IS0 7822:1990, Textile glass reinforced plastics -
The following standards contains provisions which,
Determination of void content - Loss on ignition,
through reference in this text, constitute provisions of
mechanical disintegration and statistical counting
this International Standard. At the time of publication,
methods.
the editions indicated were valid. All standards are
subject to revision, and parties to agreements based
on this International Standard are encouraged to in-
3 Definitions
vestigate the possibility of applying the most recent
editions of the standards indicated below. Members
For the purposes of this International Standard, the
of IEC and IS0 maintain registers of currently valid In-
following definitions apply.
ternational Standards.
3.1 breaking force: The maximum tensile force
IS0 291:- 1 1, Plastics - Standard atmospheres for
(expressed in newtons) required to break a test
conditioning and testing.
specimen in a tensile test.
1) To be published. (Revision of IS0 291:1977)
2) To be published. (Revision of IS0 1172:1975)
3) To be published. (Revision of IS0 1889:1987 and IS0 10120:1991)

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SIST EN ISO 9163:2000
@ IS0
IS0 9163:1996(E)
3.2 gauge length: The nominal length (expressed in
4 Principle
millimetres) between the spines of contact of an ex-
tensometer, by reference to which the length increase
A specimen of impregnated roving is subjected, using
due to a tensile force is determined.
suitable apparatus, to a tensile rupture test and the
breaking stress determined. In the case of the refer-
3.3 relative elongation: The ratio of the increase in
ence method only, the tensile modulus of elasticity of
length (expressed in millimetres) between the spines
the glass is also calculated.
of contact of an extensometer, resulting from appli-
cation of a tensile force, to the gauge length of the ex-
tensometer (also expressed in millimetres).
3.4 breaking stress: The ratio (expressed in mega-
5 Reference method
pascals) of the breaking force (expressed in newtons)
to the cross-sectional area41 of a roving (expressed in
5.1 Apparatus
square millimetres).
Ordinary laboratory apparatus, plus the following:
The force experienced by the resin can be neglected.
5.1.1 Impregnation apparatus (see figure I), includ-
3.5 loading stress: The ratio (expressed in mega-
ing the elements specified in 5.1 .I .I to 5.1 .I .4.
pascals) of the tensile force applied to a roving during
a tensile test (expressed in newtons) to the cross-
5.1.1.1 Reel, equipped with a tension-regul ating sys-
sectional area41 of the roving (expressed in square
tern capable of maintaining the roving under a tension
millimetres).
between 0,2 N and 20 N.
The force experienced by the resin can be neglected.
5.1.1.2 Impregnation vat (see figure 2), equipped
with yarn guides and capable of maintainir
lg a tem-
3.6 tensile modulus of elasticity of glass: The
perature of up to 130 OC with a precision of + 5 OC (the
megapascals) of the stress
ratio (expressed in
temperature is dependent on the resin system).
(expressed in megapascals) to the corresponding
strain, when the stress is below the proportionality
The use of a double-walled vat, with heating fluid cir-
limit or can be determined by extrapolation beyond
culating between the walls, is recommended. If a vat
this limit.
of this kind is not available, a hotplate may be used.
3.7 proportionality limit: The greatest stress
(expressed in megapascals) for which the relative
elongation is proportional to the applied force.
Dimensions in metres
Impregnation vat Winding system
Roving Die
/-- Ree1 i- \
7
Former
Tension-regulating
system
- General layout of impregnation apparatus
Figure 1
4) The cross-sectional area S of the roving, expressed in square millimetres, is given by the formula
pj x 1 o-3
P
where
pr is the exact linear density, in tex, of the unsized roving;
p is the density, in grams per cubic centimetre, of the glass constituting the roving.
2

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SIST EN ISO 9163:2000
@ IS0 IS0 9163:1996(E)
Dimensions in millimetres
Entrance guide
Exit tensioning bar Die
Die support
Exit tensioning bar
7
Roving
lmpr egnatio
Rotating spindle of die, Q, 3 -(,,
Detail of die
Detail of vat exit
4 800
800 1 600 2 400
pl (tex)
i
I,4 2
d (mm) 018 I,15
3
(mm) 1 1, 5 2
h
d=0,0283fi (round up to the nearest 0,05 mm)
NOTE - Any equipment which is equivalent to the one illustrated above may be used, provided satisfactory impregnation is
obtained. Nevertheless, it is recommended that a die diameter given in the table be used, in order to obtain a reproducible
impregnation ratio.
Figure 2 - Vat and die
5.1.1.3 Stainless-steel die, designed to give the im- 5.1.1.4 Device (mechanical or manual) for collecting
the impregnated roving, ensuring that
pregnated roving a circular cross-section.
the roving is kept under tension;
The die shall be mounted on a spindle, so that it will -
align itself automatically with the roving during reeling
(see figure 2). - the impregnated strands are kept separate from
each other.
The glass content by mass, determined as specified in
IS0 1172, shall be approximately constant at
The collecting speed shall be as constant as possible.
75 % +4 %.
3

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SIST EN ISO 9163:2000
@ IS0
IS0 9163:1996(E)
minimize the number of elementary units (packages)
5.1.2 Test machine.
to be selected.
5.121 A tensioning machine with clamps fitted with
a pin designed to hold the test specimen centrally be-
5.2.2 Conditioning
tween the jaws of the clamps shall be used. The ma-
chine shall also be equipped with a load-indicating or
Condition the packages selected as specified in 5.2.1
recording device. It shall be of the constant-rate-of-
for 12 h to 24 h in one of the standard atmospheres
extension (CRE) type and shall be used between 20 %
specified in IS0 291.
and 80 % of the selected load scale.
5.2.3 Test atmosphere
The machine shall be accurate to within + 1 % of the
indicated load over the selected load scale.
Conduct the test in the same atmospheric conditions
as those under which the rovings were conditioned
The use of two jaws with a guiding device is recom-
(see 5.2.2).
mended in order to avoid the necessity to lock the up-
per jaw manually, which could result in damage to the
test specimen.
5.3 Test specimens
The jaws shall be wider than the test specimen, and
5.3.1 Type and dimensions
shall have a gripping length of at least 50 mm. Their
faces shall be plane and parallel, shall ensure uniform
Each test specimen shall consist of an impregnated
pressure over the whole width of the test specimen,
roving with moulded end tabs. Its dimensions shall as
and shall hold it firmly without slippage.
given in figure 3.
5.1.2.2 An extensometer shall be used with associ-
A method for the fabrication of end tabs is given in
ated equipment for the continuous recording of elon-
annex A.
gation as a function of the applied force.
The extensometer shall be attached to the test
5.3.2 Number
specimen in such a way that no slipping occurs and
the test specimen is not damaged in any way. It shall
For each of the packages selected as specified in
be sufficiently light to induce negligible stresses in the
5.2.1, at least 10 test specimens shall be prepared to
test specimen. The inertia of the moving parts shall be obtain at least 10 valid readings (five for the determi-
low enough to have no effect on the force/elongation
nation of the breaking stress and five for the determi-
curve.
nation of the tensile modulus of elasticity).
The use of an extensometer with a gauge length of
5.3.3 Impregnation procedure
50 mm is recommended.
Set up the impregnating apparatus (5.1 .I) as shown in
5.1.3 Conditioning apparatus (see 52.2). figure 1.
NOTE 1 Details of the apparatus may vary depending on
5.2 Sampling and conditioning the type of roving package (reel or ball) and the way in
which it is unwound (unravelled or unrolled).
5.2.1 Sampling
The tension-regulating system and the yarn guide in
front of the vat shall not cause any damage to the
Carry out sampling in accordance with IS0 1886. Use
roving.
the “inspection by variables” method in order to
Dimensions in millimetres
Figure 3 - Test specimen

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SIST EN ISO 9163:2000
@ IS0 IS0 9163:1996(E)
Adjust the unwinding tension to 3 mN/tex, i.e.
The impregnating system and the conditions of pass-
age of the roving through the vat sh
...