BS ISO 20558-1:2018 pdf free.Plastics一Poly(phenylene sulfide) (PPS] moulding and extrusion materials Part 1: Designation system and basis for specifications. In this data block, the range of melt mass-flow rate or melt viscosity is represented by a composite designation comprising a code-letter/code-number pair indicating the test conditions followed by a sign and a two-figure code-number indicating the range itself (see i52). the whole being placed between parentheses. This designation is followed by a two-figure code-number representing the density (see 4S3) and a two-figure code-number representing the tensile modulus (see 4.5.4). The composite designation representing the melt mass-flow rate or melt viscosity, the code-number representing the density and the code-number representing the tensile modulus are separated from each other by hyphens. EXAMPLE The ranges of values of the designatory properties of PPS having a melt mass-flow rate, measured under the conditions 315 °C/5,00 kg (A5), of 8 g/10 mm (09), a density of 1 600 kg/rn3 (16) and a tensile modulus of 14000 MPa (14) would be indicated by (A5 + 09)16-14. If a property value falls on or near a range limit, the manufacturer shall state which range will designate the material. If subsequent individual test values lie on, or on…