Synthetic blood permeation tester for masks

Synthetic blood penetration tester for masks Purpose

Mask synthetic blood penetration tester is used to determine the performance of medical masks, disposable masks and other protective masks against synthetic blood spatter penetration and to assess the resistance of masks to synthetic blood penetration.

Mask synthetic blood penetration tester configuration.
1, equipment configuration pump, adjust the air pressure.
2, the tester configuration positive pressure sensor, used to collect test data pressure.
3, the pressure has an infinitely adjustable function, can set the pressure holding pressure pressure holding time and other technical parameters.

Mask synthetic blood permeation tester principle.
Through the vacuum pump to simulate breathing, and the detection of pressure difference

 

Mask synthetic blood permeation tester scope of application.
Surgical masks, disposable masks

Applicable standards.
GB/T 19083-2010 medical protective masks technical requirements 5.6 synthetic blood penetration barrier performance
YY/T 0469-2011 medical surgical mask 5.5 synthetic blood penetration test
YY/T 0691-2008 "infectious pathogens protection equipment medical mask anti-synthetic blood penetration test method

Mask synthetic blood penetration tester parameters.
Test pressure: 0-16KPa
Micropiezometer range: 0-0.1KPa
Resolution of pressure value: 0.1kPa
Time accuracy: 0.1s
Test medium: synthetic blood
Control mode: manual
Blood volume: 2ml

Testing process.
Fix the sample on the sample fixture of the instrument, 30.5cm from the sample center position will be 2ml of synthetic blood with a surface tension of 0.042 ± 0002n/m with a pressure of 16kpa from a syringe with an inner diameter of 0.84mm sprayed in the horizontal direction to the target area of the sample under test, taken down and visually inspected within 10s.

Test steps.
1, pull the puller of the sample clip at the top left of the instrument and pull down the sample clip to the left. Fix the sample (the standard requires the sample to be tested within 60s after removal from the pretreatment chamber) on the specimen clip, and if the mask has folds, unfold the folds and fix them on the specimen clip to ensure that the target area is a single layer of material, with the center of the sample as the test target area. Close the sample clip.
2, press the "start" button, at this time, a certain amount of synthetic blood (surface tension (0.042 ± 0.002) N / m) along the horizontal direction of the spray to the positioning of the target behind the mask under test, the spray began, while the time relay began to time, to the set spray time, the instrument automatically spray stop.
3、After 10s, the buzzer will sound, press the "stop" button to open the sample clip. Under suitable lighting conditions, check whether the specimen's observation surface has synthetic blood.
4, a test is over. If you need to continue the test, repeat steps 1-3 until the full test.
5、After the test is all over, remove the synthetic blood residue from the test solution tank, replace it with distilled water, clean the whole pipeline, and continue to drain all the water in the test solution tank when the nozzle sprays clear water. Close the outlet valve on the air compressor and turn off the power switch. Wash and brush the residual liquid tray, clean the working table, and remove the distilled water from the test solution tank.

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