Bundesmann Water Repellency Tester

Product Instruction

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.
RF4468 consists of 4 specimen holders of 100mm diameter cups. Rain is produced by spraying nozzles and falls down from 1500mm height from the fabrics.

Applications

Outdoor sportswear, coated fabrics, raincoats, diving suits, etc.

Standards

Product Specifications

Bundesmann Water Repellency Tester

Centrifuge

-Rotation speed: 700 rpm
-Time required to attain speed of 700 rpm from 0 and vice versa: 1-2s Mounting surface diameter: 175±0.1mm
-Number of ribs on disc: 50
-Height of ribs: 1±0.1mm
-Length of four steel pins: 6±0.5mm

Spraying Nozzles:
Distance from center of disc to steel pin: 60mm Total mass of disc and shaft: 410±2g

Nozzles distributed area: 1300 ± 6.5 cm² (Dia. 406±2mm), 300 nozzles equally distributed over a circular horizontal surface.

Number of nozzles: 300pcs
Water drop diameter: approximately 4mm
Vertical distance between the drop former and the center of the specimen surface: 1500mm ± 7.5mm

Testing Device:

Number of test cups: 4 units
Test cup carrier rotation speed: 6rpm ± 0.5rpm Wiper assembly rotation speed: 20rpm ± 0.5rpm Wiper assembly rotation angle: 100º ± 1.0 º
Force the wiper assembly pressed against the underside of the specimen: approximately 250cN length of the wiper arm: 48mm Width of the wiper arm: 5mm
Outer diameter of the test cup: 100 ± 0.05mm Exposed area of the clamped specimen: 80cm2 Air vent diameter of the test cup: 7 ± 1mm
Angle the centerline of test cup is Inclined from the vertical: 15 ± 1.0°
The flow rate of the water drop (each test cup receive water within a specified time): (200ml ± 10ml)/2.5min.

Order Information

RF4468N  Bundesmann Water Repellency Tester

RF4468N/1  Test Cup Set

RF4468C  Centrifuge