SIST EN ISO 21301-2:2019 PDF

Overview

EN ISO 21301-2:2019 - Plastics - Ethylene‑vinyl acetate (EVAC) moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties (CEN/ISO) - specifies how to prepare and condition test specimens and which test methods to use to determine the properties of EVAC moulding and extrusion materials. The standard defines specimen preparation by compression moulding, handling and conditioning requirements, and lists the material properties and test methods selected primarily from ISO 10350-1 and related test methods to ensure reproducible and comparable results.

Key topics and requirements

• Specimen preparation: Test specimens shall be produced by compression moulding in accordance with ISO 293; sheets are machined (ISO 2818) or stamped to specimen dimensions.
• Consistent processing: It is essential that specimens are always prepared using the same procedure and processing conditions to ensure comparability.
• Material handling: Raw EVAC material must be stored in moisture‑proof containers until use; moisture content for filled/reinforced materials is expressed as a percentage of total compound mass.
• Pre‑moulding treatment: Generally, no pretreatment of material is required before processing.
• Mould types and parameters: Frame (type 1) and positive (type 2) moulds are addressed; positive moulds (4–6 mm sheets) may need 5–15 min preheating and pressures around 5–10 MPa to avoid defects.
• Conditioning of specimens: Specimens shall be conditioned per ISO 291 for at least 16 hours at 23 °C ± 2 °C (no specific RH requirement).
• Property selection and testing: Properties suitable to characterize EVAC are drawn from ISO 10350-1; the document also references specific test standards (tensile, flexural, impact, MFR, density, DSC, TMA, electrical and flammability tests).
• Reproducibility caveat: Results are reproducible if methods are followed; values may differ when using other specimen dimensions or procedures.

Applications and users

This standard is practical for:

• Quality control and materials testing laboratories performing EVAC characterization
• EVAC material manufacturers and compounders specifying test methods for product datasheets
• Product designers and specification writers who need reliable property data for component design
• Certification bodies and regulatory entities assessing material performance for electrical, packaging or consumer applications

Related standards

Important referenced documents include:

• ISO 10350-1 (data presentation for moulding materials)
• ISO 21301-1 (designation system and basis for EVAC specifications)
• ISO 293 (compression moulding)
• ISO 2818 (machining of specimens)
• ISO 291 (conditioning)
• ISO 1133-1, ISO 1183-1, ISO 527, ISO 178, ISO 179-1 (typical test methods)

Keywords: EN ISO 21301-2:2019, ethylene‑vinyl acetate, EVAC, test specimens, compression moulding, conditioning, ISO 10350-1, material properties, plastics testing.