Overview
ISO/TS 23483:2022 specifies a non-contact method for measuring the heat transfer parameter of polyacrylonitrile-based (PAN-based) carbon fibre tow using a thermal imaging camera. The technical specification is focused on 12 K carbon fibre tow (≈12 000 filaments) with a filament diameter of about 7 µm, and applies to both sized and unsized fibres. The method quantifies heat transfer using thermography and Fourier’s thermal conductivity relation to provide reproducible thermal-characterization data for carbon fibre tows.
Key Topics and Requirements
- Scope: Measurement of PAN-based 12 K carbon fibre tow heat transfer parameter using a thermal imaging camera.
- Measurement principle: Thermographic recording of temperature difference (ΔT = T1 − T2) between two electrode positions across a 15 mm active tow length; apply Fourier’s law K = L·Q / (ΔT·A).
- Typical test parameters:
- Active length between electrodes: 15 mm (mounted within a total tow length of 100 mm).
- Cross-sectional area (document example): A = 4.89 × 10⁻⁷ m².
- Thermal imaging camera resolution: minimum 640 × 480.
- Emissivity: graphite/carbon emissivity at 298 K ≈ 0.97 (camera correction values for emissivity, distance, area required).
- Camera-sample distance: 200–300 mm.
- Power supply: DC, 50 V, 20 A, 1 000 W (constant).
- Environmental conditions: 296 ±2 K and 50 ±10 % RH; use an adiabatic black box chamber to avoid convection.
- Sampling & repeatability: Minimum five specimens, at least 15 measurement points per specimen; stop after 30 consecutive points and allow 30 s rest if needed.
- Calibration & traceability: Annual calibration of thermal camera per manufacturer and national metrology institute procedures.
- Reporting: Include test equipment, sample description, conditions, measured heat transfer parameter, date/time and other relevant influences.
Applications and Users
ISO/TS 23483:2022 is practical for:
- Materials laboratories and accredited test houses performing thermal characterization of carbon fibres.
- Composite manufacturers (aerospace, automotive, electronics, sporting goods) needing tow-level thermal data for thermal management, simulation, and process control.
- R&D teams optimizing fibre sizing, tow architecture, or thermal conductivity models.
- Quality control and incoming inspection processes where reproducible tow thermal properties are required.
Keywords: ISO/TS 23483:2022, carbon fibres, PAN-based, heat transfer parameter, thermal imaging camera, 12K tow, carbon fibre tow thermal measurement.
Related Standards
- ASTM D5470 - Thermal transmission properties (referenced).
- ASTM E1461 - Thermal diffusivity by the flash method (referenced).
These provide complementary methods for thermal-property measurement and context for selecting a suitable test approach.