EN ISO 24022-1:2020 PDF

Overview

EN ISO 24022-1:2020 (CEN adoption of ISO 24022-1:2020) establishes a standardized designation system for polystyrene (PS) moulding and extrusion materials. It defines how to describe amorphous polystyrene homopolymers for use in specifications by classifying materials according to key designatory properties and supplementary information (intended application, processing method, additives, fillers, colourants). The document applies to PS materials ready for normal use (unmodified or modified by additives, colourants, fillers), and explicitly excludes expanded polystyrene, styrene copolymers, substituted styrene homopolymers and PS modified with other polymers (e.g., elastomers).

Key topics and requirements

• Designation structure: a standardized pattern divided into an identity block and an individual-item block with five data blocks:
  • Data block 1: identification by abbreviated term PS (ISO 1043-1)
  • Data block 2: fillers/reinforcements and nominal content (codes per ISO 1043-2)
  • Data block 3: intended application / processing method and supplementary attributes
  • Data block 4: designatory properties - specifically Vicat softening temperature (VST) and melt mass-flow rate (MFR)
  • Data block 5: optional additional requirements or alternative specifications
• Classification basis: materials are differentiated primarily by Vicat softening temperature and melt mass‑flow rate, plus information about additives, fillers and intended use.
• Limits and disclaimers: the standard does not provide engineering performance data or processing conditions and does not guarantee identical performance for materials sharing the same designation.
• Reference test methods: where additional properties are needed, determination is by the test methods in ISO 24022-2 (preparation of test specimens and determination of properties).

Applications and users

Who uses this standard:

• Material suppliers and compounders - to label and communicate PS grades consistently.
• Product designers and engineers - to identify candidate PS grades by VST and MFR for moulding or extrusion processes.
• Procurement and quality managers - to create clear material specifications and acceptance criteria.
• Testing laboratories and certification bodies - for standardized identification and cross-referencing of PS materials.

Practical uses:

• Creating unambiguous material designations for contracts and specifications
• Communicating filler/content and processing-intent information between manufacturers and OEMs
• Establishing a basis to request specific test data (via ISO 24022-2) when mechanical, thermal or processing performance must be specified

Related standards

• ISO 24022-2 - Preparation of test specimens and determination of properties
• ISO 1043-1 - Symbols and abbreviated terms (basic polymers)
• ISO 1043-2 - Symbols for fillers and reinforcing materials
• Supersedes ISO 1622-1:2012

Keywords: polystyrene designation system, EN ISO 24022-1:2020, PS moulding materials, melt mass-flow rate, Vicat softening temperature, thermoplastic specification.