ISO 14526-2:1999

Overview

ISO 14526-2:1999 specifies how to prepare test specimens and determine the properties of phenolic powder moulding compounds (PF‑PMCs). It defines required handling, conditioning and specimen‑preparation procedures (injection or compression moulding), and lists the test methods suitable to characterize PF‑PMCs. The standard is intended to ensure reproducible, comparable test results for material selection, quality control and specification of phenolic moulding powders.

Key topics and technical requirements

• Specimen preparation methods
  • Injection moulding: follow ISO 10724‑1/2; typical melt and mould temperature ranges are specified and fixed values must be recorded for each test series.
  • Compression moulding: follow ISO 295; mould temperature, pressure and cure time ranges are given by compound type (fine/coarse filler).
  • Use the same processing method and parameters for all specimens of a given material to ensure comparability.
• Pretreatment and storage
  • Keep PF‑PMC material in moisture‑proof containers; express moisture as % of total mass for filled/reinforced materials.
  • Pretreatment (drying, preforming, preplastification) allowed per ISO 295 or manufacturer instructions.
• Conditioning
  • Method 1 (general): condition specimens per ISO 291 for at least 16 h at (23 ± 2) °C and (50 ± 5) % RH.
  • Method 2 (water‑conditioning): 24 h in distilled water at ambient temperature, then ISO 291 for 2 h.
• Properties and test methods
  • Properties are drawn from ISO 10350‑1 and other relevant methods and include: rheological/processing (moulding shrinkage, thermal flow), mechanical (tensile, flexural, creep, Charpy impact, tensile‑impact), thermal (HDT, coefficient of linear thermal expansion, glass transition), flammability/oxygen index, puncture impact and electrical characteristics where applicable.
  • Test specimen dimensions and specific test conditions are prescribed to obtain reproducible data; results may vary if different specimen sizes or procedures are used.
• Reporting
  • Record processing conditions (temperatures, pressures, cure time) and conditioning method used alongside the measured properties.

Applications and users

ISO 14526‑2 is used by:

• Materials and product engineers selecting PF‑PMCs for electrical, mechanical or high‑temperature applications
• Laboratory technicians and third‑party test labs performing certification and quality control testing
• Manufacturers specifying processing and testing requirements for product datasheets
• R&D teams comparing phenolic moulding compounds and optimizing formulations

Typical applications include technical components in electrical insulation, switches, high‑temperature structural parts and flame‑resistant housings where PF‑PMC mechanical, thermal and flammability performance must be verified.

Related standards

• ISO 14526‑1 (designation system and basis for specifications)
• ISO 14526‑3 (requirements for selected moulding compounds)
• ISO 10350‑1 (data acquisition and presentation)
• ISO 10724‑1/2, ISO 295 (moulding methods), ISO 291 (conditioning), ISO 2818 (machining specimens), relevant IEC fire/electrical test methods

Keywords: ISO 14526‑2, PF‑PMC, phenolic powder moulding compounds, test specimens, specimen preparation, injection moulding, compression moulding, conditioning, mechanical properties, thermal properties, moulding shrinkage.