【Scope of application】
The water resistance measuring instrument is mainly used for the determination of the water resistance of contact wound dressings (500mm hydrostatic pressure 300S capacity).
【Relevant Standards】
【Scope of application】:
The water resistance measuring instrument is mainly used for the determination of the water resistance of contact wound dressings (500mm hydrostatic pressure 300S capacity).
[Meet the standard]:
YY/T 0471.3-2004
【Technical Parameters】:
1. Liquid level scale: 500mm
2. Inner diameter of the fixture: 50mm
3. Fixture depth: 40mm
4. Fixture outer diameter: 80mm
5. Water pipe inner diameter: 10mm
6. Water pipe height: 550mm
【Test Steps】:
1. The prepared sample should be free of wrinkles;
2. Fill the pool with purified water at (21±2)°C;
3. Place the sample on the lower ring in a horizontal sliding manner to avoid air between the surface of water and the lower surface of the sample;
4. Cover the upper surface of the sample with dry filter paper larger than the test area, put the upper ring, and clamp it with a threaded device;
5. Inject water into the tube until it reaches the required water level above the sample surface;
6. Maintain the water pressure (300±10)S;
7. Check whether there is water seepage through the sample on the filter paper and record the results;
【Evaluation of test results】:
Check whether the filter paper has passed the water seepage and record the results, if any of the 3 samples have water seepage test failed.
