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