Bundesmann Water Repellency Tester determines the water resistance of fabrics to the simulated rain under the moving condition.
Fabric is held on the test cup under which there is rain wipers which is rotating and rub the fabric underside. The amount of the water penetrates the fabric into the test cup can be measured. And the amount of water absorbed by the fabric can be weighed and determined.
Testing Scopes:
Outdoor sportswear, coated fabrics, raincoats, diving suits, etc.
Testing Standards：
ISO 9865, DIN EN 29865, GB/T 14577, BS EN 29865, JIS L1092
Specification:
1. Touchscreen operation.
2. Flow rate, specimen rack rotation speed, wipe rotation speed can be set in the touchscreen.
3. Nozzles distributed area: 1300 ± 6.5 cm2 (Dia. 406±2mm), 300 nozzles equally distributed over a circular horizontal surface.
4. Number of Nozzles: 300pcs
5. Water Drop Diameter: Approximately 4mm
6. The vertical distance between the drop former and the center of the specimen surface: 1500mm ± 7.5mm
7. Number of Test Cups: 4 units
8. Test Cup Carrier Rotation Speed: 6rpm ± 0.5rpm
9. Wiper Assembly Rotation Speed: 20rpm ± 0.5rpm
10. Wiper Assembly Rotation Angle: 100º ± 1.0 º
11. The Force the Wiper Assembly Pressed Against the Underside of the Specimen: Approximately 250cN
12. The length of the Wiper Arm: 48mm
13. The Width of the Wiper Arm: 5mm
14. The Outer Diameter of the Test Cup: 100 ± 0.05mm
15. The Exposed Area of the Clamped Specimen: 80cm2
16. The Air Vent Diameter of the Test Cup: 7 ± 1mm
17. The Angle the Centerline of Test Cup is Inclined from the Vertical: 15 ± 1.0°
18. The Flow Rate of the Water Drop (each test cup receive water within a specified time): (200ml ± 10ml)/2.5min.
19. Flow rate automatic control, no need manual adjusted.
20. Pump control, the water tank pressure is stable.
21. Precision test heads, provides accurate and even water drops.
22. Water level automatic controlled in the water tank.
23. Testing water internal recycling, saving a lot of water resources.
24. Testing cup can be lifted individually, much more convenient for replacing specimens.
25. An external temperature-controlled water supply device can be connected, to enable the RF4468N to test specimens under different water temperatures.
26. Dimensions of the Main Machine: 750(L)×750(W)×2100(H)mm
27. Weight of the Main Machine: Approximately 235kg
28. Power: AC 220V，50/60Hz
The Specification of the Centrifuge:
1. Rotation Speed: 700rpm
2. The Time Required to Attain the Speed of 700rpm from 0 and Vice Versa: Between 1s and 2s
3. Mounting Surface Diameter: 175 ± 0.1mm
4. The Number of the Ribs on the Surface of the Disc: 50 ribs
5. The Height of the Ribs: 1 ± 0.1 mm
6. The Length of the Four Steel Pins: 6 ± 0.5mm
7. The Distance from the Center of the Disc to the Steel Pin: 60mm;
8. The Total Mass of the Disc and Shaft: 410 ± 2g
9. Dimensions of the Main Machine: 300(L)×420(W)×460(H)mm
10. Weight of the Main Machine: Approximately 23kg
11. Power: AC 220V，50/60Hz
Ordering Information：
RF4468NP Bundesmann Water Repellency Tester
RF4468NP/1 Test Cup Set
RF4468C Centrifuge