EN ISO 24026-2:2020 PDF

Overview

EN ISO 24026-2:2020 - Plastics: Poly(methyl methacrylate) (PMMA) moulding and extrusion materials - Part 2 - specifies how to prepare test specimens and determine material properties for PMMA moulding and extrusion grades. The standard defines handling, conditioning and injection‑moulding procedures to obtain reproducible, comparable test results and lists the suitable test methods needed to characterise PMMA materials.

Key topics and technical requirements

• Scope: Methods for specimen preparation and property measurement for PMMA moulding and extrusion materials; requirements for handling and conditioning of test material and specimens.
• Specimen preparation: Specimens shall be prepared by injection moulding in accordance with ISO 294-1 and using the processing conditions given in Clause 4.3 (melt temperature, mould temperature, melt velocity, hold pressure, cooling time).
• Material treatment: Moisture in the material before processing shall not exceed 0.05 % by mass; if higher, the sample must be dried per manufacturer instructions.
• Melt temperature control: Melt temperature must be held to within ±3 °C when moulding test specimens. Melt temperature can be determined from the material designation code (MFR code-number, or VST and VN code-numbers when provided).
• MFR-based melt temperatures (examples):
  • MFR code 005 → 270 °C
  • MFR code 015 → 260 °C
  • MFR code 030 → 250 °C
  • MFR code 060 → 240 °C
  • MFR code 120 → 230 °C
  • MFR code 240 → 220 °C
• Reproducibility emphasis: The standard stresses using the same preparation procedure (injection moulding) and processing conditions for all specimens to ensure comparable values.
• Property selection: Properties are selected mainly from ISO 10350‑1; other widely used or significant test methods for these materials and designatory properties in ISO 24026‑1 are included.

Applications and users

• Who uses it: Materials scientists, quality control laboratories, R&D teams, polymer suppliers, moulding and extrusion manufacturers, and specifiers who need standardised property data for PMMA.
• Practical uses: Establishing material specifications, comparing grades for optical or mechanical applications, verifying supplier claims, performing QC on incoming PMMA batches, and generating data for product datasheets and regulatory dossiers.

Related standards

• ISO 24026‑1 (designation system and basis for specifications)
• ISO 10350‑1 (single‑point data acquisition)
• ISO 294‑1 (injection moulding of test specimens)
• Other referenced test methods (e.g., ISO 527‑2, ISO 1133‑1, ISO 62, ISO 175)

Keywords: EN ISO 24026-2:2020, PMMA, poly(methyl methacrylate), test specimens, injection moulding, melt temperature, conditioning, MFR, VST, VN, material properties.