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  • BSI
    BS EN ISO 20568-1:2017 Plastics. Fluoropolymer dispersions and moulding and extrusion materials - Designation system and basis for specifications
    Edition: 2018
    $435.35
    / user per year

Description of BS EN ISO 20568-1:2017 2018

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

  • 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).



Standard NumberBS EN ISO 20568-1:2017
TitlePlastics. Fluoropolymer dispersions and moulding and extrusion materials - Designation system and basis for specifications
StatusUnder Review
Publication Date2018-05-16
ReplacesBS EN ISO 12086-1:2006
Identical National Standard OfEN ISO 20568-1:2017, ISO 20568-1:2017
CorrectsBS EN ISO 20568-1:2017
DescriptorsExtruding, Dispersions (chemical), Thermoplastic polymers, Fillers, Moulding (process), Plastics, Physical properties of materials, Fluorocarbons, Polytetrafluoroethylene, Polymers, Designations
ICS83.080.20 Thermoplastic materials
CommitteePRI/82
ISBN978 0 539 00878 4
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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