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Your location: Home > Related Articles > Experimental Operation of Hydrostatic Pressure Tester for Medical Clothing

Experimental Operation of Hydrostatic Pressure Tester for Medical Clothing

Author:QINSUN Released in:2023-08 Click:108

The hydrostatic pressure resistance tester for medical clothing is used to measure the liquid permeability and blood permeability of protective materials such as medical clothing, outdoor sports clothing, umbrellas, fabrics raincoats and jackets. It is independently developed and produced by our company qisnun Precision Electromechanical Technology Co., Ltd. Test equipment, comprehensive and cost-effective after-sales service.

Applicable standards:

GB/T 4744, AATCC 127, ERT 120-1 160-0, BS EN20811/3321/3424, AFNOR G07-057, ISO 811, JIS L1092A , JIS L1092.B-a, JIS L1092 B-b, ASTM F903C, ASTM F1670, ASTM F1671, EN 1734, ISO 1420, FZ/T 01004.

Main Parameters:

1. Test pressure: 0-5000mbar (5000cmW.G);

2. Pressure accuracy: 0.1 mbar resolution;

3. Test area: 100 cm2 (optional 10 cm2, 19.63 cm2 , 26cm2, 28cm2);

4. Sample thickness: noover 40mm;

5. Compressed air: 6-8 bar (clean and dry air);

6. Alarm duration: 0-9999 min (adjustable according to pressure or time).

Test principle:

The sample is fixed on the test area of ​​the standard area, and The air compressor 0 Air at -5 bar is added to a water tank filled with distilled water, and a certain water pressure acts on the sample. Tests can be performed by dynamic or static methods.

(1) Dynamic method: determine the hydrostatic pressure resistance of the sample by testing the pressure when a fixed number of water droplets ooze from the side of the sample that is not in contact with water at a certain rate of pressure increase.

(2) Static method: The hydrostatic pressure resistance of the material is determined by testing the water infiltration of the sample after holding the pressure pend for a certain time under a certain hydrostatic pressure.

Experimental operation:

1. Cut the test fabric into a sample of 100 mm × 100 mm;

2. Place the sample in the apparatus and tighten it The device is fixed;

3. Press the up button and the metal container with 700ml of water begins to rise at a constant speed driven by the motor, which increases the water pressure on the sample in the device;

4. Measure the water penetration by observing the change in color of the indicator paper coated on the filter paper sample through the plastic window of the device;

5. When the initial color change (from blue to pink) of the indicator paper Upon the appearance of the signal, immediately read the scale The height of the level of water is expressed in Pa (mmH20);

6. Press the up button again to prevent the metal container from rising and save the reading.re as filter paper water resistance test data;

7. Open the device, take out the sample and indicator paper, dry the loading window of the device with a soft cloth and check the water level in the device;

8 If necessary, fill with water and use another sample Indicator d The paper is again placed on the template and the above test steps are repeated for the test.