ISO/DIS 20568-1-2015 pdf free.Plastics一Fluoropolymer dispersions and moulding and extrusion materials – Part 1: Designation system and basis for specifications.
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 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 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 For CPT, ECTFE, EFEP, ETFE, FEP, PFA, PVDF. PVF.
a) melting-peak temperature
b) Melt mass-flow rate For PCTFE
a) zero-strength time (ZST) For TFE/PDD
Glass transition temperature (TQ) For aqueous dispersion of melt pi-ocessable resins ( ETFE, FEP, PFA, PVDF, PVF.
a) Polymer percentage in dispersion
b) Surfactant percentage in dispersion
C) Surf actant 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 tluoropolymers 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 arid 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 therm op lastics — 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.ISO/DIS 20568-1 pdf free download.