This document specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of poly(phenylene sulfide) (PPS) moulding and extrusion materials.
Requirements for handling test material and for conditioning both the test material before moulding and the specimens befo…
2Expert Interpretation
This article details the ISO 20558-2 standard for specimen preparation and performance determination of polyphenylene sulfide (PPS) injection molding and extrusion materials. It covers professional and technical content such as specimen handling conditions, test parameter selection, and comparison of key performance indicators. It is suitable for reference by polymer materials engineers and quality inspectors.
Analysis of the core content of the standard
ISO 20558-2:2018, as the international specification for polyphenylene sulfide (PPS) material testing, focuses on three technical modules:
Standardized process for specimen preparation (moisture content ≤ 0.05%)
Test environment control system (23±2℃/50±5%RH)
Performance test method cluster (covering mechanical/thermal/electrical properties)
Typical case: An automotive connector manufacturer reduced the shrinkage rate of PPS products from 1.2% to 0.8% by optimizing the holding time parameters.
Standard Evolution Analysis
Main technical updates of this version of the standard (2018) that replaces ISO 28078-2:2009:
Added a new melt viscosity test method (ISO 11443)
Refined the temperature control for ash content test (600±25℃ vs 750±50℃)
Improved the electrode configuration requirements for electrical performance test
Implementation Recommendations
A dehumidifying dryer (dew point ≤-40℃) must be used for material pretreatment
ISO 20753 A1 type multi-purpose specimen is recommended for mechanical testing
For reinforced grade PPS, special attention should be paid to the selection of ash content test temperature
Electrical performance test should be carried out after 48 hours of temperature and humidity equilibrium
ISO 20558-2:2018 — Plastics - Poly(phenylene sulfide) (PPS) moulding and extrusion materials - Part 2: Preparation of test specimen and determination of properties is an international standard developed by International Organization for Standardization (ISO). This document specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of poly(phenylene sulfide) (PPS) moulding and extrusion materials. Requirements for handling test material and for...
What does ISO 20558-2:2018 cover?
This standard covers: This document specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of poly(phenylene sulfide) (PPS) moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding...
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of ISO 20558-2:2018?
The current published version is ISO 20558-2:2018, published on 2018-04-01. Always check for amendments or pending revisions.
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