Appareil de mesure des effets des basses températures sur la rigidité des polymères
- Ray-Ran - RR/CFT
BS2782: Part 1: Method 104B, ISO458/1 & 458/2 ASTM D1043
Determines how low temperatures affect the torsional stiffness properties of flexible materials
Designed and built by Ray-Ran the Cold Flex Tester determines how low temperatures affect the torsional stiffness properties of flexible materials including polyvinyl chloride extrusion compounds by measuring the temperature at which a test specimen is twisted through a known angular displacement using a pulley system by a specified torque.
The apparatus complies with BS2782: Part 1: Method 104B, ISO458/1, 458/2 and ASTM D1043 International Test Standards.
The apparatus consists of a low temperature bath with electronic PID temperature controller, heater and a PT100 platinum resistance thermometer accurate to 0.1°C which accurately controls the heating cycle of the test. To ensure temperature stability within the bath during the cooling and heating cycle a stirrer motor system is also fitted to the apparatus. Suitable means should be used to ensure the liquid medium can be lowered to the test temperatures required such as adding solid carbon dioxide (dry ice).
The specimen clamping mechanism is manufactured from stainless steel and has one fixed side with the other side mounted in low friction bearings which is allowed to rotate. The torque is applied to the test sample by placing known weights to the pulley system which causes the clamped test specimen to rotate or twist about its vertical axis. Angular deflection measurements (in degrees) are then taken from the integrated radial dial indicator.
The actual test is very simple to conduct. The temperature of the bath is lowered to a temperature that will cause the sample to approximately twist a known angle of deflection. Heat or increased torque is then applied to the sample to increase its twist to a given angle of deflection subject to the international Test Standard you are working too. From the temperature and the angle of deflection readings taken the apparent torsional modulus of elasticity can be determined.
Simple and unique this apparatus has become a valuable addition to the Ray-Ran product range of materials testing equipment.
- Apparent torsional modulus of elasticity
- Integrated low temperature bath
- PID electronic temperature control
- Resolution 0.1°C
- PT100 PRT sensor accurate to 0.1°C
- Integrated stirrer motor
- Stainless steel clamping mechanism
- Low friction bearing assembly
- Integrated radial dial indicator (degrees)
- Torque load weights supplied
- Product user manual
- CE declaration certificate
- 1 year return to base warranty
- 110v 60Hz – 240v 50Hz 10 amp
Complies with BS2782: Part 1: Method 104B, ISO458/1 & 458/2 ASTM D1043
Heat transfer medium (silicone oil) 10 ltrs
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