EN ISO 12086-2:1999

SLOVENSKI STANDARD
SIST EN ISO 12086-2:2000
01-maj-2000
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Plastics - Fluoropolymer dispersions and moulding and extrusion materials - Part 2:
Preparation of test specimens and determination of properties (ISO 12086-2:1995)
Plastiques - Polymeres fluorés: dispersions et matériaux pour moulage et extrusion -
Partie 2: Préparation des éprouvettes et détermination des propriétés (ISO 12086-
2:1995)
Ta slovenski standard je istoveten z: EN ISO 12086-2:1999
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 12086-2:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 12086-2:2000

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SIST EN ISO 12086-2:2000

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SIST EN ISO 12086-2:2000

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SIST EN ISO 12086-2:2000
INTERNATIONAL IS0
STANDARD 12086-Z
First edition
1995-12-15
Plastics - Fluoropolymer dispersions and
moulding and extrusion materials -
Part 2:
Preparation of test specimens and
determination of properties
P/as tiques - Polymh-es fluor&: dispersions et matbiaux pour moulage
et extrusion -
Partie 2: Pbpara tion des kprouve ttes et dhtermina tion des propriMs
Reference number
IS0 12086-2:1995(E)

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SIST EN ISO 12086-2:2000
ISO 12086-2:1995(E)
Contents
Page
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Scope
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Normative references
3
3 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
4 Symbols and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Sampling
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Preparation of test specimens
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7 Conditioning and test conditions
4
8 General testing of fluoropolymers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
8.1 Electrical properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.2 Mechanical properties
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .a. 6
8.3 Thermal-transition temperatures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.4 Density
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.5 Flammability by oxygen index
8.6 Particle size and size distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
9 Testing of fluoropolymer dispersions
13
9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.2 Preparation of test samples
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.3 Isolation of PTFE from dispersion
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
9.4 Coagulum in dispersions
9.5 Percentage polymer and surfactant in aqueous dispersions 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9.6 PTFE solids content by hydrometer
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9.7 pH of dispersions
. . . . . . . . . . . . . . . . . . . . . . 16
10 Testing of PTFE and closely related materials
16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .~.
10.1 General
. . . . . . . . . . . . . . . . . . . . . . 16
10.2 Preparation of test specimens by moulding
0 IS0 1995
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 Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland

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SIST EN ISO 12086-2:2000
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
10.3 Bulk density
10.4 Extrusion pressure .*.*. 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.5 Powder-flow time 27
10.6 Standard specific gravity (SSG), extended specific gravity (ESG),
and thermal-instability index (TII) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.7 Stretching-void index (SVI) . . 30
11 Testing of conventionally melt-processible fluoropolymers . . 32
11.1 Preparation of test specimens by moulding . . . . . . . . . . . . . . . . . . . . . . 32
11.2’ Melt mass-flow rate (MFR) and melt volume-flow rate (MVR) 33
12 Other test methods used with fluoropolymers . . . . . . . . . . . . . . . . . . . . 35
12.1 B.rittleness temperature of plastics and elastomers by impact 35
12.2 Coefficients of static and kinetic friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
12.3 Zero-strength time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Annexes
A Listing of test methods (alphabetical order) . . . . . . . . . . .a. 36
B Designator-y properties for common fluoropolymer types with
cross-reference listing to the tables for codes in IS0 12086-I and the
test methods in IS0 12086-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C Bibliography 40

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SIST EN ISO 12086-2:2000
Q IS0
IS0 12086-2:1995(E)
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, 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 12086-2 was prepared by Technical Committee
lSO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials.
IS0 12086 consists of the following parts, under the general title
P/as tics - Fluoropolymer dispersions and moulding and extrusion ma-
terials:
- Part 7: Designation system and basis for specifications
- Part 2: Preparation of test specimens and determination of proper-
ties
Annexes A, B and C of this part of IS0 12086 are for information only.

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SIST EN ISO 12086-2:2000
IS0 12086-2:1995(E)
INTERNATIONAL STANDARD 0 ISO
Plastics - Fluoropolymer dkpersions and moulding
and extrusion materials -
Part 2:
Preparation of test specimens and determination of
properties
WARNING - This part of IS0 12086 may involve hazardous materials, operations and equipment.
It does not purport to address all of the safety problems associated with its use. It is the
responsibility of the user of this part of IS0 12086 to establish appropriate safety and health
practices and determine the applicability of regulatory limitations prior to use. The warnings in
subclauses 8.6.1 .I, 9.7 and 10.6.1.3 point out specific hazards.
1.3 Agreements between vendor and purchaser
1 Scope
should preferably be based on properties measured
using the specimens and test conditions described in
this part of IS0 12086.
1.1 This part of IS0 12086 describes the prepara-
tion of test specimens and provides test methods to
define characteristics of thermoplastic fluoropolymer
resins. Results from the testing may be used as the
2 Normative references
basis for designation, material specifications, or both.
This part of IS0 12086 describes the conditions of
The following standards contain provisions which,
test for determining both designator-y and other prop-
through reference in this text, constitute provisions
erties of the homopolymers and various copolymers
of this part of IS0 12086. At the time of publication,
of fluoromonomers, as dispersions or powders for
the editions indicated were valid. All standards are
moulding, extrusion, and other uses. The test pro-
subject to revision, and parties to agreements based
cedures included are appropriate for, but are not re-
on this part of IS0 12086 are encouraged to investi-
stricted to, the fluoropolymers listed in clause 4 and
gate the possibility of applying the most recent edi-
for which designatory properties are specified in
tions of the standards indicated below. Members of
IS0 12086-I.
IEC and IS0 maintain registers of currently valid
International Standards.
1.2 The properties of semi-finished and finished
IS0 75-2: 1993, Plastics - Determination of tempera-
products made from fluoropolymer resins depend on
ture of deflection under load - Part 2: Plastics and
the material used, the shape of the product, the
ebonite.
physical and morphological state of the material re-
sulting from the processing operations, and on the
IS0 178:1993, Plastics - Determination of flexural
test conditions. Therefore, to obtain reproducible test properties.
results, the defined methods of preparation of test
IS0 179: 1993, Plastics - Determination of Charpy
specimens and defined test conditions given in this
impact strength.
part of IS0 12086 must be applied.

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SIST EN ISO 12086-2:2000
0 IS0
IS0 12086-2:1995(E)
IS0 12086-I : 1995, Plastics - Fluoropolymer disper-
IS0 180:1993, Piastics - Determination of lzod im-
sions and moulding and extrusion materials -
pact strength.
Part 1: Designation system and basis for specifica-
Standard atmospheres for
IS0 291:1977, Plastics - tions.
conditioning and testing.
IEC 93:1980, Methods of test for volume resistivity
IS0 293:1986, Plastics - Compression moulding test and surface resistivity of solid electrical insulating
specimens of thermoplastic materials. materials.
IEC 243-l : 1988, Methods of test for electric strength
IS0 47211988, Plastics - Vocabulary.
of solid insulating materials - Part 7: Tests at power
IS0 527-l :I 993, Plastics - Determination of tensile frequencies.
properties - Part I: General principles.
IEC 250: 1969, Recommended methods for the deter-
IS0 527-2:1993, Plastics - Determination of tensile
mination of the permittivity and dielectric dissipation
properties - Part 2: Test conditions for moulding and
factor of electrical insulating materials at power, audio
extrusion p/as tics.
and radio frequencies including metre wavelengths.
IS0 527-3:1995, Plastics - Determination of tensile
ASTM D 746-79(1987), Test method for brittleness
properties - Part 3: Test conditions for films and
temperature of plastics and elastomers by impact.
sheets.
ASTM D 1430-91 a, Specification for polychloro-
IS0 565:1990, Test sieves - Metal wire cloth, per-
trifluoroe thylene (PCTFE) p/as tics.
forated metal plate and electroformed sheet - Nom-
inal sizes of openings. ASTM D 1457-91 a, Specification for PTFE molding
and extrusion materials.
IS0 842:1984, Raw materials for paints and varnishes
- Sampling. ASTM D 1894-93, Test method for static and kinetic
coefficients of friction of plastic film and sheeting.
IS0 1043-I :I 987, Plastics - Symbols - Part I:
Basic polymers and their special characteristics. ASTM D 3418-83( 1988), Test method for transition
temperatures of polymers by thermal analysis.
IS0 1043-2:1988, Plastics - Symbols - Part 2: Fill-
ers and reinforcing materials. ASTM D 4052-91, Test method for density and rela-
tive density of liquids by digital density meter.
IS0 1133:1991, Plastics - Determination of the melt
mass-flow rate (MFR) and the melt volume-flow rate ASTM D 4591-93a, Test method for determining
(Ml/t?) of thermoplastics. temperatures and heats of transitions of fluoro-
polymers by differential scanning calorimetry.
IS0 1148:1980, Plastics - Aqueous dispersions of
polymers and copolymers - Determination of pH. ASTM D 4894-91 a, Specification for polytetrafluoro-
ethylene (PTFE) granular molding and ram extrusion
- Methods for determining
IS0 1183:1987, Plastics
materials.
the density and relative density of non-cellular
plastics. ASTM D 4895-91 a, Specification for polytetrafluoro-
ethylene (PTFE) resins produced from dispersion.
Determination of
IS0 4589: 1984, P/as tics -
flammability by oxygen index. BS 3406:Part 5:1983, Methods for determination of
particle size distribution - Part 5: Recommendations
IS0 8962:1987, Plastics - Polymer dispersions -
for electrical sensing zone method (the Coulter prin-
Determination of density.
ciple).
IS0 12000:-1), Plastics/rubber - Polymer disper-
BS 4641: 1986, Method for specifying electroplated
sions and rubber latices (natural and synthetic) -
coatings of chromium for engineering purposes.
Definitions and review of test methods.
1) To be published.
2

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SIST EN ISO 12086-2:2000
IS0 12086=2:1995(E)
0 IS0
NOTE 2 With PTFE, “moulding” and “compaction” are
3 Definitions
terms used interchangeably with “preforming”.
3.1 The terminology given in IS0 472 is applicable
3.2.9 sintering (as it applies to PTFE): A thermal
to this part of IS0 12086, except for terms defined in
treatment during which the material is melted and
3.2. The terms listed in 3.1 .I to 3.1.3 are repeated
recrystallized by cooling, with coalescence occurring
from IS0 472 to be sure there is no misunderstand-
during the treatment.
ing.
3.2.10 standard specific gravity (SSG): The spe-
3.1.1 dispersion: A heterogeneous system in which
cific gravity of a specimen of PTFE material pre-
a finely divided material is distributed in another ma-
formed, sintered, and cooled through the
terial.
crystallization point at a rate of 1 “C per minute in ac-
cordance with the appropriate sintering schedule as
3.1.2 fluoroplastic: A plastic based on polymers
described in this part of IS0 12086.
made with monomers containing one or more atoms
of fluorine, or copolymers of such monomers with
NOTE 3 The SSG of unmodified PTFE is inversely related
other monomers, the fluoromonomer(s) being in the
to its molecular mass.
greatest amount by mass.
3.2.11 suspension polymer: A polymer isolated
3.1.3 latex: A colloidal aqueous dispersion of a
from its liquid polymerization medium as a solid hav-
polymeric material.
ing a particle size well above colloidal dimensions.
3.2.12 zero-strength tim,e (ET): A measure of the
3.2 For the purposes of this part of IS0 12086, the
relative molecular mass of PCTFE.
following additional definitions apply.
3.2.1 amorphous: Noncrystalline, or devoid of reg-
ular structure.
4 Symbols and abbreviations
3.2.2 bulk density: The mass (in grams) per litre of
material, measured under the conditions of the test.
4.1 The abbreviated terms given in IS0 1043-I and
IS0 1043-2 are applicable to this part of IS0 12086.
3.2.3 copolymer: A polymer formed from two or
more types of monomer.
4.2 This part of IS0 12086 is particularly concerned
3.2.4 emulsion polymer (as it applies to fluoro-
with, but is not limited to, test methods for the ma-
Material isolated from its
polymer materials):
terials listed below:
polymerization medium as a colloidal aqueous disper-
polytetrafluoroethylene
PTFE
sion of the polymer solids.
PFA perfluoro(alkoxy alkane)
NOTE 1 This definition, used in the fluoropolymer indus-
try, is similar to that for “latex” in IS0 472 and is quite dif-
FEP perfluoro(ethylene-propene)
ferent from the definition for “emulsion” in IS0 472.
copolymer
3.2.5 fluorocarbon plastic: A plastic based on
EFEP ethylene-tetrafluoroethylene-
polymers made from perfluoromonomers only.
hexafluoropropene copolymer
3.2.6 fluoropolymer: Synonymous with fluoro-
TFE/PDD tetrafluoroethylene-perfluoro(dioxole)
plastic (see 3.1.2).
copolymer
3.2.7 melt-processible: Capable of being processed
VDF/HFP vinylidene fluoride-
by, for example, injection moulding, screw extrusion,
hexafluoropropene copolymer
and other operations typically used with thermo-
plastics.
VDF/TFE vinylidene fluoride-
tetrafluoroethylene copolymer
3.2.8 preforming: Compacting powdered PTFE ma-
VDF/TFE/HFP vinylidene fluoride-
terial under pressure in a mould to produce a solid
tetrafluoroethylene-
object, called a preform, that is capable of being han-
hexafluoropropene copolymer
dled.
3

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SIST EN ISO 12086-2:2000
0 IS0
IS0 12086-2:1995(E)
ethylene-tetrafluoroethylene
ETFE
7 Conditioning and test conditions
copolymer
7.1 For tests of specific gravity, tensile properties,
poly(vinylidene fluoride)
PVDF
and electrical properties, condition the moulded test
specimens in atmosphere 23 of IS0 291 for a period
vinylidene fluoride-
VDF/CTFE
of at least 4 h prior to testing. The other tests require
chlorotrifluoroethylene copolymer
no conditioning.
PCTFE polychlorotrifluoroethylene
NOTE 4 For PVDF, some producers recommend waiting
PVF poly(vinyl fluoride)
one week after moulding before testing in order to minimize
the effects of post crystallization.
ethylene-chlorotrifluoroethylene
ECTFE
copolymer
7.2 Conduct tests at a laboratory temperature of
23 “C + 2 “C for determining specific gravity, tensile
properfies, and electrical properties only. (See note 5
for comments related to PTFE.) Since the fluoro-
4.3 For the purposes of this part of IS0 12086, the
polymer resins do not absorb water, the maintenance
following abbreviated terms apply in addition to those
of constant humidity during testing is not necessary.
given in 3.2 and 4.2.
Conduct tests for melt flow rate and melting-peak
AF amorphous fluoropolymer
temperature under ordinary laboratory conditions.
ESG extended specific gravity (see 10.6)
NOTE 5 A minimum temperature of 22 “C should prefer-
ably be maintained with PTFE due to its first-order transition
MFR melt mass-flow rate (see 11.2)
just below 22 “C that affects properties determined at
slightly lower temperatures. This effect of temperature is
MVR melt volume-flow rate (see 11.2)
especially important during the determination of
density/specific gravity.
SSG standard specific gravity (see 10.6)
stretching-void index (see 10.7)
SVI
8 General testing of fluoropolymers
thermal-instability index (see 10.6)
TII
Properties required for designation or specification,
ZST zero-strength time (see 12.3)
or both, shall be determined in accordance with the
international or national standards listed in clause 2
or the procedures given in this part of IS0 12086.
Tables of values of the designatory properties and
corresponding codes are included in IS0 12086-I.
5 Sampling
Tables of values and codes are also included in this
part of IS0 12086 for many of the other properties
The materials should preferably be sampled in ac-
that are needed to supplement the designatory prop-
cordance with IS0 842. Adequate statistical sampling
erties for specification and other purposes.
shall be considered an acceptable alternative. Special
considerations are included in the pertinent clause.
8.1 Electrical properties
8.1 .I Dielectric constant and dissipation factor
Determine these properties on three specimens, each
6 Preparation of test specimens
100 mm in diameter, in accordance with IEC 250.
Where applicable, IS0 standards shall be followed for Typical frequencies used for testing are 100 Hz,
the preparation of test specimens. In some instances, 1 kHz, 1 MHz and 100 MHz. For some applications,
it is important to know the values at subambient and
special procedures are required that are described ei-
elevated temperatures. Codes for test frequencies
ther in the general discussion or in the method.
and values of the properties are given in tables 1 and
2 .

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SIST EN ISO 12086-2:2000
IS0 12086=2:1995(E)
0 IS0
NOTE 6 Electrical properties, like many other properties,
vary with temperature.
Table 3 - Codes and ranges for dielectric
strength
Code Dielectric strength (kV/mm)
A <5
Table 1 - Codes for test frequencies
B 5to<10
Test frequency
Code
C 10to<15
D 15to<20
100 Hz
E 20 to < 25
1 kHz
F 25 to < 30
1 MHz
100 MHz G 30 to < 35
35 to < 40
H
I 40 to < 45
J 45 to < 50
K 50 to < 55
L 55 to < 60
Table 2 - Codes and ranges for dielectric
M 60 to < 65
constant and dissipation factor
N 65 to < 70
0 70 to < 75
Dielectric
Code Code Dissipation factor
P 75 to < 80
constant
Q 80 to < 85
< I,6 A < 0,000 1
A
R 85 to < 90
B 0,000 1 to < 0,000 2
B I,6 to < I,8
S 90 to < 95
I,8 to < 2,0 C 0,000 2 to < 0,000 4
C
T 95 to < 100
D 2,0 to < 2,2 D 0,000 4 to < 0,000 6
U 3 100
E 2,2 to < 2,4 E 0,000 6 to < 0,000 8
F 2,4 to < 2,6 F 0,000 8 to < 0,001 0
G 2,6 to < 2,8 G 0,001 0 to < 0,001 2
H 2,8 to < 3,0 H 0,001 2 to < 0,001 4
I
I 3,0 to < 3,2 0,001 4 to < 0,001 6
8.1.3 Surface resistivity
J 0,001 6 to < 0,001 8
J 3,2 to < 3,4
K 0,001 8 to < 0,002 0
K 3,4 to < 3,6
Determine this property in accordance with IEC 93.
L 0,002 0 to < 0,002 2
L 3,6 to < 4,0
Codes and ranges are listed in table4.
M 4,0 to < 4,5 M 0,002 2 to < 0,002 4
N 4,5 to < 5,0 N 0,002 4 to < 0,002 6
0 5,0 to < 5,5 0 0,002 6 to < 0,002 8
Table 4 - Codes and ranges for surface
P 5,5 to < 6,0 P 0,002 8 to < 0,003 0
resistivity
Q 6,0 to < 6,5 R 0,003 0 to < 0,003 5
S 6,5 to < 7,0 S 0,003 5 to < 0,004 0
Code Surface resistivity (a)
I I
I
T 7,0 to < 8,0 T 0,004 0 to < 0,006 0
U 8,0 to < 9,0 U 0,006 0 to < 0,008 0 A < IO3
V 9,0 to < IO,0 V 0,008 0 to < 0,010 B IO3 to lo'*
W
W IO,0 to < 11 ,o 0,010 to < 0,030 C > lo'*
X 11 ,o to < 12,0 X 0,030 to < 0,lO
Y
Y 12,o to < 14,0
> Ql
Z 3 14,0
8.2 Mechanical properties
8.1.2 Dielectric strength (electric strength)
8.2.1 Impact properties
Determine this property in accordance with the pro- Determine impact properties using the procedures of
cedures of IEC 243-l. Codes for values of the prop- IS0 180 for lzod impact strength and IS0 179 for
erty are given in table3. Charpy impact strength. Codes and ranges are given
in table 5. The test used, the size of the test speci-
NOTE 7 Dielectric strength, which is expressed in kilo-
men, and the type of notch shall be reported in addi-
volts per millimetre, varies with the thickness of the test
tion to the code for impact strength.
specimen.
5

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SIST EN ISO 12086-2:2000
0 IS0
IS0 12086=2:1995(E)
(078) 15.10.77, Fax: (078) 41.05.45, and Accurate Steel Rule
Die Co., 22 West 21st Street, New York, NY 10010, USA,
Table 5 - Codes and ranges for impact
Tel.: (212) 242-3606. This information is given for the con-
properties
venience of users of this part of IS0 12086 and does not
constitute an endorsement by IS0 of these products. Other
Code Impact strength (J/m)
sources may be available or a die may be constructed from
A < 100
details in figure 1.
I3 120 to < 140
C 140 to < 160
Calculate the percentage elongation using the follow-
D 160 to < 180
ing equation:
180 to E
F 200 to < 300
1 OOd
% elongation = p
G 300 to < 400
22,0m
H 400 to < 500
I 500 to < 600
where
J 600 to < 700
K 700 to < 800
is the distance, in millimetres, on the chart;
d
L 800 to < 900
M > 900
m is the chart-speed magnification
[= chart speed/crosshead speed (both in
same units)];
8.2.2 Tensile properties
22,0 is a factor allowing for the fact that d is in
8.2.2.1 Fluoropolymers for which tensile
millimetres.
modulus is not to be determined
8.2.2.1.3 ASTM D 1457 includes a summary of the
8.2.2.1.1 PTFE skived film with a thickness equal to
precision for tensile strength and percentage elon-
or less than 0,125 mm shall be tested in accordance
gation at break for PTFE, FEP, and PFA. Additional
with the procedure described in IS0 527-3:1995, us-
round-robin testing on use of the microtensile die is
ing test specimen type 2.
in progress within ASTM Committee D-20.
8.2.2.1.2 For test specimens other than the skived
Bias is a systematic error that contributes to the dif-
film referred to in 8.2.2.1 .I (equal to or less than
ference between a test result and a true (or reference)
0,125 mm in thickness), prepare five specimens using
value. There are no recognized standards on which to
the microtensile die described in figure 1. The die shall
base an estimate of bias for this test procedure.
be of the steel-rule type with a curvature of
5 mm + 0,5 mm (see note 8). Determine the tensile
8.2.2.2 Fluoropolymers for which tensile
proper&s in accordance with the procedures de-
modulus is to be determined
scribed in IS0 527-l except that the specimens used
shall be as detailed above, the initial jaw separation
Determine tensile properties in accordance with
shall be 22,0 mm + 0,13 mm, and the speed of test-
IS0 527-2:1993 using test specimen 5A and a cross-
ing shall be 50 mm/min & 5 mm/min. Clamp the
head speed of 50 mm/min + 5 mm/min. For deter-
-
specimens with an essentially equal length in each
mination of tensile modulus, use a crosshead speed
jaw. Determine the elongation from the recorder
of 1 mm/min.
chart, expressing it as a percentage of the initial jaw
separation. In determining elongation from the chart,
8.2.3 Modulus in flexure
draw a perpendicular line from the break point to the
time axis. Measure the distance along the time axis
Determine this property in accordance with the pro-
from the foot of this perpendicular line to the begin-
cedures of IS0 178.
Optionally, an
of the load-time curve.
ning
extensiometer may be used to determine the elon-
8.3 Thermal-transition temperatures
gation.
8.3.1 Deformation temperature under load
NOTE 8 The steel-rule type of die has been found satis-
factory for this purpose. Two sources for these steel-rule
Determine this temperature in accordance with the
dies are: Stansvormenfabriek Vervloet B.V., Postbus 220,
procedures of IS0 75-2.
Gantelweg 15, 3350 AE Papendrecht, Netherlands, Tel.:
6

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SIST EN ISO 12086-2:2000
IS0 12086=2:1995(E)
Dimensions in millimetres
Rockwell C hardness 45to 50
Steel-rule die
(Inside dimensions for die are the same astestspecimen)
Die to be sharpened on outside edge only (as shown in A-A)
r8 22~0,25 =8
- t *
138
I I
- -
Possible thicknesses: I,5 ?0,3
I I
+O,lS
03
1 +O,l
OS
0,125 ?0,03
Test specimen
Figure 1 - Microtensile die
8.3.2 Glass-transition temperature(s) 8.3.3.1 Test samples/specimens for melting-peak
temperature determination may be powder as re-
ceived, dried polymer isolated from a dispersion, or
Determine these temperatures in accordance with the
the required amount cut from a pellet or fabricated
procedures of ASTM D 3418.
-piece of the resin as sold or received. The test shall
be determined on a IO mg + 2 mg specimen of dry
polymer. It is desirable, but not essential, to test two
specimens, each being run twice, using both a heat-
8.3.3 Melting-peak temperature
ing and a cooling cycle.
Melting-peak temperature characteristics are specific Some fluoropolymers such as PTFE show different
for fluoropolymers and help identify a particu
...