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Full Notch Creep Test (FNCT)
The OCS Full Notch Creep Test (FNCT) is a widely used method of classifying polyethylene materials
in terms of their slow crack growth behaviour under accelerated conditions. A circumferentially
notched body is loaded in a tempered wetting agent with a defined tensile stress, and the time until
a break occurs is measured.
Testable Raw Materials: Polyethylene materials
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- 15 sample stations with independent tensile stress adjustment and data acquisition
- Load application through easily adjustable lever weight system
- Precise adjustment of tensile stress through electronic force sensor
- Uniform bath temperature control through extensive bath insulation
- Exhaust air connections for targeted vapour extraction
- Continuous pH value measurement with adjustable warning and alarm thresholds
- No time limit on test times, time resolution: 1 second (real time)
- Operation via touch panel with data trend as well as optical and acoustic alarm functions
- High chemical resistance of the material used (stainless steel)
| Tensile force range (infinitely variable pull arm system with 115–315 N) | 2.5–6.5 MPa for samples 10 × 10 × 100 mm with notch depth of 1.6 mm |
| 15–40 MPa for samples 6 × 6 × 90 mm with notch depth of 1.6 mm | |
| Force measurement | Electronic force sensor with a resolution of 0.01 N |
| Fluid volume | Approx. 55 l |
| Level control | Stainless steel float sensors and magnetic valves |
| Inlet pressure range for the supply of demineralised water | 0.2–8 bar (3–116 psi) |
| Communication protocol | MODBUS (RTU, TCP/IP), PROFIBUS, PROFINET, OPC (Server/Client), CSV file, customer-specific |