ISO 3605:1987

IS0
INTERNATIONAL STANDARD
3605
Second edition
1987-05-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION
ORGANISATION INTERNATIONALE DE NORMALISATION
MEXaYHAPOAHAR OPrAHMSAI#lR fl0 CTAHflAPTMSAL(i4M
Textile glass - Rovings - Determination of
compressive strength of rod composites
Verre textile - Stratifils - Détermination de la résistance à la Compression sur joncs
Reference number
IS0 3605 : 1987 (E)

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Foreword
IS0 (the international Organization fôr 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.
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 3605 was prepared by Technical Committee ISO/TC 61,
Plastics.
This second edition cancels and replaces the first edition (IS0 3605 : 19781, clauses 1,
3, 4 and 5 of which have been technically revised.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organization for Standardization, 1987 O
Printed in Switzerland

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INTERNATIONAL STANDARD IS0 3605 : 1987 (E)
Textile glass - Rovings - Determination of
compressive strength of rod composites
1 Scope and field of application 3.2 Resin.
This International Standard specifies a method foi' determining
Not all resin systems are necessarily suitable and the system to
the compressive strength of composite rods of circular cross- be used shall be at the discretion of the roving supplier. In the
section made from rovings.
event of dispute, the system used shall be declared and shall
form the basis for the test, subject to an agreement between
This test may be made on rods as moulded, or on rods that
the interested parties. The selected resin system shall be mixed
have been in boiling water for a specified time. in accordance with the resin manufacturer's detailed instruc-
tions. (See the annex.)
This test is intended for inspection testing and quality control of
rovings and the results obtained shall not be used for the
3.3 Metal wire, for pulling the roving through the mould
generation of design data.
(3.1).
3.4 impregnating equipment (figure I).
2 References
This equipment may include one or two impregnating baths. It
IS0 291, Plastics - Standard atmospheres for conditioning
is recommended that a device for removing air bubbles by
and testing.
means of rollers be included. It is also recommended that for
pultrusion of the rods, the machine be adjustable to a constant
IS0 1172, Textile glass reinforced plastics - Determination of
speed in the range of 1 to 12 mm/s.
the loss on ignition.
Oven with air circulation, for curing and/or postcuring
3.5
3 Apparatus and material the resin at the recommended temperature.
3.1 Mould, in the form of a straight rigid cylinder having a
3.6 Diamond-tipped saw.
minimum length of 400 mm and a standard internal diameter of
6 f 0,l mm; if other diameters are chosen, these shall be
selected by agreement between the interested parties from the
3.7 Micrometer.
range of 4 to 10 mm (with tolerances of _+ 0,l mm).
The mould may be constructed of glass or polytetra-
3.8 Heating plate and glassware, if test after boiling-water
fluoroethylene. treatment is required.
_.
1

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IS0 3605 : 1987 (E)
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IS0 3605 : 1987 (E)
5 Procedure
3.9 Compression testing machine, capable of maintaining
a constant speed of 1 mm/min.
5.1 Preparation of the rovings
3.10 Two test jigs, as shown, for example, in figure 2, each Take a parallel assembly of rovings, 1 m long (or more
consisting of
according to mould length) and of the correct mass (approxi-
mately 15 g for the rods of 6 mm diameter) to give a glass
a) a base plate X;
content in the moulded rod of 65 I 3 % (mim).
b) an elastic compressive pad Y (for example of
polyamide);
5.2 Preparation of reinforced rods
c) a support ring Z.
Fold the roving assembly about its midpoint and secure the
hank at this point to a length of the wire (3.3). Condition for at
least 16 h in one of the standard laboratory atmospheres
defined in IS0 291. Take care to minimize contamination of the
roving during handling.
Dimensions in millimetres
Impregnate the roving by immersion in a bath containing the
catalysed resin (3.2) or by any other suitable means. In order to
Test specimen
obtain a good impregnation, it is desirable to eliminate air
bubbles within the filaments. A good way to do this is to pull
di
the impregnated rovings under metallic rollers. Another
method is to pull the specimen vertically. When the roving is
completely impregnated, draw it into the mould (3.1) by means
of the wire. This drawing shall be done at a constant speed,
preferably using an adjustable-speed motor capable of pulling
the wire at a speed in the range of 1 to 10 mm/s.
2
Draw the lower end of the roving a few millimetres into the
inside of the mould and prevent flow-out of resin by sealing the
I
opening of the mould with a cork or plastic stopper, or by a
cellophane bag sealed over the opening of the mould with
. CI
cellulose tape.
Y (polyamide)
Prepare in this way a number of rods sufficient to run at least
15 compressive strength tests (or 30 if the compressive
strength is also to be determined after treatment with boiling
water).
QS a
lil-
5.3 Curing of the rods
Cu
...