SIST EN ISO 20568-1:2017

SLOVENSKI STANDARD
oSIST prEN ISO 20568-1:2015
01-julij-2015
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Plastics - Fluoropolymer dispersions and moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO/DIS 20568-1:2015)
Kunststoffe - Fluorpolymerdispersionen, Formmassen und Extrusionsmaterialien - Teil 1:
Bezeichnungssystem und Basis für Spezifikationen (ISO/DIS 20568-1:2015)
Plastiques - Polymère fluoré: dispersions et matériaux pour moulage et extrusion - Partie
1 : Système de désignation et base de spécification (ISO/DIS 20568-1:2015)
Ta slovenski standard je istoveten z: prEN ISO 20568-1
ICS:
83.080.20 Plastomeri Thermoplastic materials
oSIST prEN ISO 20568-1:2015 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 20568-1:2015

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oSIST prEN ISO 20568-1:2015
DRAFT INTERNATIONAL STANDARD
ISO/DIS 20568-1
ISO/TC 61/SC 9 Secretariat: KATS
Voting begins on: Voting terminates on:
2015-05-21 2015-08-21
Plastics — Fluoropolymer dispersion and moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
Plastiques — Polymère fluoré: dispersions et matériaux pour moulage et extrusion —
Partie 1: Système de désignation et base de spécification
ICS: 83.080.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the European Committee for Standardization
(CEN), and processed under the CEN lead mode of collaboration as defined in the
Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND composition will be undertaken at publication stage.
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 20568-1:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

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oSIST prEN ISO 20568-1:2015
ISO/DIS 20568-1:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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Published in Switzerland
ii © ISO 2015 – All rights reserved

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oSIST prEN ISO 20568-1:2015
ISO DIS 20568-1
Contents                                                  Page
Foreword ………………………………………………………………………………………………………… iv
1   Scope ………………………………………………………………………………………………………. 1

2   Normative reference ……………………………………………………………………………………… 2

3   Designation and specification system ………………………………………………………………. 3
3.1  General ……………………………………………………………………………………………………. 3
3.2  Data block 1 ………………………………………………………………………………………………… 4
3.3  Data block 2 ………………………………………………………………………………………………… 6
3.4  Data block 3 ………………………………………………………………………………………………… 6
3.5 Data block 4 ………………………………………………………………………………………………… 8
3.6  Data block 5 …………………………………………………………………………………………………14
4   Example of a designation …………………………………………………………………………………14









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oSIST prEN ISO 20568-1:2015
ISO DIS 20568-1
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 20568-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic
materials.
ISO 20568 consists of the following parts, under the general title Plastics — Fluoropolymer dispersions and
moulding and extrusion materials:
 Part 1: Designation system and basis for specifications
 Part 2: Preparation of test specimens and determination of properties

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oSIST prEN ISO 20568-1:2015
DRAFT INTERNATIONAL STANDARD ISO DIS 20568-1

Plastics — Fluoropolymer dispersions and moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
1 Scope
1.1 This part of ISO 20568 establishes a system of designation for fluoropolymer materials, which
may be used as the basis for specifications.
1.2 The various types of fluoropolymer are differentiated from each other by a classification system
based on appropriate levels of the designatory properties.

1.2.1 For PTFE
1.2.1.1 For polytetrafluoroethylene (PTFE) granular moulding and ram extrusion materials, and for
polytetrafluoroethylene (PTFE) resin produced from coagulation of dispersion
a) Standard specific gravity (SSG)
b) Bulk density
c) Particle size
1.2.1.2 For aqueous dispersion of polytetrafluoroethylene (PTFE)
a) PTFE percentage in dispersion
b) Surfactant percentage in dispersion
c) Surfactant tolerance level
1.2.2 For melt processable resins
1.2.2.1 For CPT, ECTFE, EFEP, ETFE, FEP, PFA, PVDF, PVF,
VDF/CTFE, VDF/HFP, VDF/TFE, VDF/TFE/HFP

a) melting-peak temperature

b) Melt mass-flow rate
1.2.2.2 For PCTFE

a) zero-strength time (ZST)

1.2.2.3 For TFE/PDD

a) Glass transition temperature (T )
g
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oSIST prEN ISO 20568-1:2015
ISO DIS 20568-1

1.2.2.4 For aqueous dispersion of melt processable resins ( ETFE, FEP, PFA, PVDF, PVF,
      VDF/CTFE, VDF/HFP, VDF/TFE, VDF/TFE/HFP)

      a) Polymer percentage in dispersion
      b) Surfactant percentage in dispersion
      c) Surfactant tolerance level
and on information about the intended application and/or method of processing, important
properties additives, colorants, fillers and reinforcing materials.

1.3 The designation system is applicable to all fluoropolymers and blends. It applies to unmodified
materials ready for normal use and materials modified, for example, by colorants, additives, fillers,
reinforcing materials, and polymer modifiers
1.4 One should not assume that materials having the same designation give the same performance.
This part of ISO 20568 does not provide engineering data, performance data or data on processing
conditions which may be required to specify a material. If such additional properties are required, they
shall be determined in accordance with the test methods specified in part 2 of this International
Standard, if suitable.
1.5 In order to designate a thermoplastic material to meet particle specifications, the requirements are
to be given in data block 5 (see 3.1).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 472, Plastics — Vocabulary
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1043-2, Plastics — Symbols and abbreviated terms — Part 2: Fillers and reinforcing materials
ISO 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate
(MVR) of thermoplastics — Part 1: Standard method
ISO 20568-2, Plastics — Fluoropolymer dispersions and moulding and extrusion materials — Part 2:
Preparation of test specimens and determination of properties
ASTM D 1430, Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D 2116, Specification for FEP fluorocarbon molding and extrusion materials.
ASTM D 3418, Standard Test Method for Transition Temperatures of Polymers by Differential Scanning
Calorimetry
ASTM D 4441, Specification for aqueous dispersions of polytetrafluoroethylene.
ASTM D 4591, Standard Test Method for Determining Temperatures and Heats of Transitions of
Fluoropolymers by Differential Scanning Calorimetry
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oSIST prEN ISO 20568-1:2015
ISO DIS 20568-1
ASTM D 4894, Specification for polytetrafluoroethylene (PTFE) granular molding and ram extrusion
materials.
ASTM D 4895, Specification for polytetrafluoroethylene (PTFE) resins produced from dispersion.

2.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and the following terms
and definitions apply.
2.1.1
melt-processable
capable of being processed by, for example, injection moulding, screw extrusion and other operations
typically used with thermoplastics
2.1.2
presintered resin
resin that has been treated thermally at or above the melting point of the resin at atmospheric pressure
without having been previously preformed
2.1.3
reprocessed plastic
material from the manufacture of semifinished forms of fluoropolymers that has been converted to a
form suitable for further use
2.1.4
sintering
PTFEthermal treatment during which the material is melted and recrystallized by cooling, with
coalescence occurring during the treatment
2.1.5
standard specific gravity
SSG
specific gravity of a specimen of PTFE material preformed, sintered and cooled through the
crystallization point at a rate of 1 °C per minute in accordance with the appropriate sintering schedule
as described in ISO 20568-2
NOTE The SSG of unmodified PTFE is inversely related to its molecular mass.
2.1.6
zero-strength time
ZST
measure of the relative molecular mass of PCTFE.
NOTE The ZST of PCTFE is proportionally related to its molecular mass.
3 Designation and specification system
3.1 General
The designation system for thermoplastics is based on the following standard pattern:
Designation
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oSIST prEN ISO 20568-1:2015
ISO DIS 20568-1
Identity block
Individual-item block
International
Description block
Standard
(optional)
Data Data Data Data Data
number
block block block block block
block
1 2 3 4 5

The designation consists of an optional description block, reading “Thermoplastics”, and an identity
block comprising the International Standard number and an individual-item block. For unambiguous
designation, the individual-item block is subdivided into five data blocks comprising the following
information:
 Data block 1: Identification of the plastic by its abbreviated term for the fluoropolymer as listed in
Table 1 and information about the composition of the polymer (see Table 1 and
Table 2).
 Data block 2: Fillers or reinforcing materials and their nominal content (see 3.3).
 Data block 3: Position 1: Intended application and/or method of processing (see 3.4).
Positions 2 to 8: Important properties, additives and supplementary information (see
3.4).
 Data block 4: Designatory properties (see 3.5).
 Data block 5: For the purpose of specifications, the fifth data block contains appropriate
information (see 3.6)
The first character of the individual-item block shall be a hyphen. The data blocks shall be separated
from each other by a comma.
If a data block is not used, this shall be indicated by doubling the separation sign, i.e. by two commas
(,,).
NOTE: Data blocks 1 and 2 together form the part marking symbol.
3.2 Data block 1
In this data block, fluoropolymers are identified by the abbreviated term accordance with ISO 1043-1
(supplemented by the abbreviated term listed in Table1) and, after a hyphen , a symbol indicating the
additional information as specified in Table2.
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oSIST prEN ISO 20568-1:2015
ISO DIS 20568-1
Table 1 - Symbols indicating the chemical structure of fluoropolymers materials in Data Block 1
Meaning of code-letter
CPT
chlorotrifluoroethylene-perfluoroalkoxy-tetrafluoroethylene copolymer
ECTFE ethylene-chlorotrifluoroethylene copolymer
EFEP ethylene-tetrafluoroethylene-hexafluoropropene copolymer
ETFE ethylene-tetrafluoroethylene copolymer
FEP
perfluoro(ethylene-propene) copolymer
PCTFE polychlorotrifluoroethylene
PFA perfluoro(alkoxy alkane)
PTFE polytetrafluoroethylene
PVDF poly(vinylidene fluoride)
PVF poly(vinyl fluoride)
TFE/PDD Tetrafluoroethylene-perfluorodioxole copolymer
VDF/CTFE vinylidene fluoride-chlorotrifluoroethylene copolymer
VDF/HFP vinylidene fluoride-hexafluoropropene copolymer
VDF/TFE vinylidene fluoride-tetrafluoroethylene copolymer
VDF/TFE/HFP vinylidene fluoride-tetrafluoroethylene-hexafluoropropene copolymer

Table 2 – Meaning of code letter, when used, for additional information in Data Block 1
Code-letter Meaning of code-letter
A Modified
D Dispersion
E Emulsion polymer
F
Filler resin (additive resin)
H Homopolymer
K Copolymer
S Suspension polymer
SS
Presintered suspension polymer
Z1 In-house-recovered material; out of specification/waste
Z2 Reprocessed; byproduct from processing
Z3
Postconsumer material

Blends
Blends can be made from materials mentioned in both tables and/or other polymers (ISO 1043). For
polymer blends or alloys use the abbreviated terms for the basic polymers, with the main component in
first place followed by the other components in descending order according to their mass fractions,
separated by a plus sign and no space before or after the plus sign.
EXAMPLE A blend of FEP and PFA is designated : FEP+PFA
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ISO DIS 20568-1
3.3 Data block 2
In this data block, the type of filler and/or reinforcing material is represented by a single code-letter in
position 1 and its physical form by a second code-letter in position 2, the code-letters being as specified
in Table 3. Subsequently (without a space), the actual content by mass percent shall be given by a two
figure number in position 3.
Table 3 - Symbols for fillers and reinforcing materials and form or structure in data block 2
a
Code-letter Material Code-letter Form or structure
B Boron B Bead, spheres, balls
C Carbon C Chips, cuttings
C1 Coke D Powder
C2 F
Partially graphitized carbon Fibre
C-G Graphite G Ground
E Clay H Whiskers
G Glass K Knitted fabric
K L
Calcium carbonate Layer
M Mineral, metal M Mat (thick)
M1 Aluminium oxide N Non-woven and thin
M2 Bronze P Paper
M3 S
Calcium fluoride Rovings
M4 Molybdenum disulfide T Scales, flakes
M5 Stainless steel V Cord
P Mica W Veneer
Q X
Silica Not specified
R Aramid Y Yarn
S Synthetic, organic Z Others
S-X X is the abbreviated term for a polymer used as the filler
T
Talcum
X Not specified
Z1 In-house-recovered material
Z2 Reprocessed material
X3
Postconsumer material
a
The materials may be further defined, for example by their chemical symbols or by additional symbols defined in the
relevant International Standard.

Mixtures of materials or forms may be indicated by combining the relevant codes using the sign “+” and
placing the whole between parentheses. For examples, a mixture of 25% glass fibres (GF) and 8%
mineral powder (MD) would be indicated by (GF25+MD8).

3.4 Data block 3
In this data block, information about intended application and/ or method of processing is given in
position 1 and Information about important properties, additives and colour in information in positions 2
to 8. The code-letters are specified in Table 4. If information is presented in positions 2 to 8 and no
specific information is given in position 1, the letter X (no indication) shall be inserted in position 1.
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oSIST prEN ISO 20568-1:2015
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Table 4 — Code-letters used in data block 3
Intended application or method of processing Essential properties, additives or other information
Code-letter Position 1 Code-letter Positions 2 to 8
A Adhesives C Coloured
B Blow moulding D Powder
B1 Extrusion blow moulding D1 Dry blend
B2 D2
Injection blow moulding Free-flowing
C Calendering D3 Not free-flowing
E Extrusion E Expandable
F Filled compounds F Special burning characteristics
G General use F1 Oxygen index  95 %
H Coating F2 Flame retarded
H1 F4
Powder coating Reduced smoke emission
H2 Dip coating G Granules
H3 Wet coating G1 Pellets
H4 Impregnation G2 Lentils
H5 G3
Spray coating Beads
K Cable and wire coating H1 Stabilized against radiation
L Monofilament extrusion L Light and weather stabilized
M Moulding M Nucleated
M1 M1
Injection moulding Modified by comonomer
M2 Transfer moulding N Natural (no colour added)
P Paste extrusion N1 Suitable for food contact
Q Compression moulding N2 High purity
Q1 P
Automatic moulding Impact modifiied
Q2 Isostatic moulding R Mould release agent
R Rotational moulding S Lubricated
S Sintering S1 External lubrication
T T
Tape manufacture Transparent
T1 Skived tape or film T1 Translucent
T2 Unsintered tape or film T2 Opaque
T3 Expanded t
...