EN ISO 20568-1:2017

SLOVENSKI STANDARD
01-september-2017
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SIST EN ISO 12086-1:2006
SIST EN ISO 12086-1:2006/AC:2008
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Plastics - Fluoropolymer dispersions and moulding and extrusion materials - Part 1:
Designation system and basis for specifications (ISO 20568-1:2017)
Kunststoffe - Fluorpolymerdispersionen, Formmassen und Extrusionsmaterialien - Teil 1:
Bezeichnungssystem und Basis für Spezifikationen (ISO 20568-1:2017)
Plastiques - Polymère fluoré: dispersions et matériaux pour moulage et extrusion - Partie
1 : Système de désignation et base de spécification (ISO 20568-1:2017)
Ta slovenski standard je istoveten z: EN ISO 20568-1:2017
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 20568-1
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 12086-1:2006
English Version
Plastics - Fluoropolymer dispersions and moulding and
extrusion materials - Part 1: Designation system and basis
for specifications (ISO 20568-1:2017)
Plastiques - Polymères fluorés: dispersions et Kunststoffe - Fluorpolymerdispersionen, Formmassen
matériaux pour moulage et extrusion - Partie 1: und Extrusionsmaterialien - Teil 1:
Système de désignation et base de spécification (ISO Bezeichnungssystem und Basis für Spezifikationen
20568-1:2017) (ISO 20568-1:2017)
This European Standard was approved by CEN on 29 April 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20568-1:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 20568-1:2017) has been prepared by Technical Committee ISO/TC 61 “Plastics”
in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by
NBN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2017, and conflicting national standards
shall be withdrawn at the latest by December 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 12086-1:2006.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 20568-1:2017 has been approved by CEN as EN ISO 20568-1:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 20568-1
First edition
2017-05
Plastics — Fluoropolymer dispersions
and moulding and extrusion
materials —
Part 1:
Designation system and basis for
specifications
Plastiques — Polymères fluorés: dispersions et matériaux pour
moulage et extrusion —
Partie 1: Système de désignation et base de spécification
Reference number
ISO 20568-1:2017(E)
©
ISO 2017
ISO 20568-1:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 20568-1:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Designation and specification system . 3
4.1 General . 3
4.2 Data block 1 . 4
4.3 Data block 2 . 5
4.4 Data block 3 . 6
4.5 Data block 4 . 7
4.6 Data block 5 .12
5 Examples of designations .13
ISO 20568-1:2017(E)
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9,
Thermoplastic materials.
This first edition of ISO 20568-1 cancels and replaces ISO 12086-1:2006, which has been technically
revised to introduce a new designation system.
A list of all the parts in the ISO 20568 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved

INTERNATIONAL STANDARD ISO 20568-1:2017(E)
Plastics — Fluoropolymer dispersions and moulding and
extrusion materials —
Part 1:
Designation system and basis for specifications
1 Scope
This document establishes a system of designation for fluoropolymer materials, which may be used as
the basis for specifications.
The various types of fluoropolymer are differentiated from each other by a classification system based
on appropriate levels of the designatory properties and on information about the intended application
and/or method of processing, important properties, additives, colorants, fillers and reinforcing
materials.
For polytetrafluoroethylene (PTFE)
For PTFE granular moulding and ram extrusion materials, and for PTFE resin produced from
coagulation of dispersion:
— standard specific gravity (SSG)
— bulk density
— particle size
For aqueous dispersion of PTFE
— PTFE percentage in dispersion
— surfactant percentage in dispersion
— surfactant tolerance level
For melt processable resins
For CPT, ECTFE, EFEP, ETFE, FEP, PFA, PVDF, PVF, VDF/CTFE, VDF/HFP, VDF/TFE, VDF/TFE/HFP
— melting-peak temperature
— melt mass-flow rate
For PCTFE
— zero-strength time (ZST)
For TFE/PDD
— glass transition temperature (T )
g
For aqueous dispersion of melt processable resins (ETFE, FEP, PFA, PVDF, PVF, VDF/CTFE,
VDF/HFP, VDF/TFE, VDF/TFE/HFP)
— polymer percentage in dispersion
— surfactant percentage in dispersion
ISO 20568-1:2017(E)
— surfactant tolerance level
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.
It is not intended to imply that materials having the same designation give necessarily the same
performance. This document 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
are intended to be determined in accordance with the test methods specified in ISO 20568-2, if suitable.
In order to specify a thermoplastic material for a particular specification, the requirements are to be
given in data block 5 (see 4.1).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR)
of thermoplastics — Part 1: Standard method
ISO 11357-2, Plastics — Differential scanning calorimetry (DSC) — Part 2: Determination of glass transition
temperature and glass transition step height
ISO 11357-3, Plastics — Differential scanning calorimetry (DSC) — Part 3: Determination of temperature
and enthalpy of melting and crystallization
ISO 20568-2, Plastics — Fluoropolymer dispersions and moulding and extrusion materials — Part 2:
Preparation of test specimens and determination of properties
ASTM D1430, Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
ASTM D2116, Standard Specification for FEP-Fluorocarbon Molding and Extrusion Materials
ASTM D4441, Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene
ASTM D4591, Standard Test Method for Determining Temperatures and Heats of Transitions of
Fluoropolymers by Differential Scanning Calorimetry
ASTM D4894, Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram
Extrusion Materials
ASTM D4895, Standard Specification for Polytetrafluoroethylene (PTFE) Resins Produced From Dispersion
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
2 © ISO 2017 – All rights reserved

ISO 20568-1:2017(E)
3.1
melt-processable
capable of being processed by, for example, injection molding, screw extrusion and other operations
typically used with thermoplastics
3.2
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
3.3
reprocessed plastic
material from the manufacture of semifinished forms of fluoropolymers that has been converted to a
form suitable for further use
3.4
sintering
thermal treatment during which the material is melted and recrystallized by cooling, with
coalescence occurring during the treatment
3.5
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 1 to entry: The SSG of unmodified PTFE is inversely related to its molecular mass.
3.6
zero-strength time
ZST
measure of the relative molecular mass of PCTFE
Note 1 to entry: The ZST of PCTFE is proportionally related to its molecular mass.
4 Designation and specification system
4.1 General
The designation system for thermoplastics is based on the following standard pattern:
Designation
Identity block
Individual-item block
International
Description block
Standard
Data Data Data Data Data
(optional)
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 4.3).
ISO 20568-1:2017(E)
— Data block 3: Position 1: Intended application and/or method of processing (see 4.4).
Positions 2 to 8: Important properties, additives and supplementary information (see 4.4).
— Data block 4: Designatory properties (see 4.5).
— Data block 5: For the purpose of specifications, the fifth data block contains appropriate information
(see 4.6).
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.
4.2 Data block 1
In this data block, fluoropolymers are identified by the abbreviated term in accordance with ISO 1043-1
(supplemented by the abbreviated term listed in Table 1) and, after a hyphen, a symbol indicating the
additional information as specified in Table 2.
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
4 © ISO 2017 – All rights reserved

ISO 20568-1:2017(E)
Table 2 (continued)
Code-letter Meaning of co
...