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    Home > Active Ingredient News > Drugs Articles > Medical synthetic blood penetration tester principle.

    Medical synthetic blood penetration tester principle.

    • Last Update: 2020-07-19
    • Source: Internet
    • Author: User
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    for the determination of liquid-derived liquid injection penetration performance for synthetic blood to evaluate its safety protection performance,applicable standards:GB19083-2010:medical protectionmelting filtertechnical requirements;YY Y469-2011:medical surgicalmelting filtration;YY/T0; 691-2008: medical masks for protective equipment for infectious pathogens
    anti-
    synthetic blood penetration test methods
    (fixed volume, horizontal injection ); The liquid jet speed of 12.7mm : 450cm/s; 550cm/s; 635 cm/s
    Power: AC220V 50Hz PMMA Production Size: 800MM-460MM-550MM
    4, main purpose
    for medical melting filter blood splash penetration determination It can be used by medical inspection departments, safety inspection departments and scientific research units V, the principle medical mask sample support on the test device, at a distance of 300mm will be 2mL of synthetic blood from the inner diameter of 0.84mm sleeve in the horizontal direction of the spray to the melting filter Simulate the scene of the mask being spewed by perforated blood vessels and observe the penetration of the -melting filter the synthetic blood on the other side tested the medical mask samples at liquid injection speeds of 450cm/s, 550cm/s, 635 cm/s respectively The test results of each injection speed were recorded and the acceptable mass level of the medical mask was given with a limit of 4 corresponding gao blood pressure Six, test step 1, pull the instrument upper left sample clip pull hand, left pull down the sample clip The sample (standard requires the sample to be taken out of the pretreatment room 60s for testing) is fixed to the specimen clip, if the melting filter material there are folds, the fold struction is fixed to the specimen clip, to ensure that the target area is a single layer of material, the sample center as the test target area Close the specimen clip 2, press the "start" key, at this time, a certain amount of synthetic blood (surface tension (0.042 x 0.002)N/m) in the horizontal direction sprayed to the target behind the measured melt spray filter , while the time timer starts timing, to the set injection time, the instrument automatically stops spraying 10s after the buzzer sounded, press the "stop" button, pay attention to check the sample's observation surface for synthetic blood 3, the end of a trial If the test needs to continue, repeat step A-C until the full test is completed the end of the test, the test tank of synthetic blood residue to remove clean, into distilled water, cleaning the entire line, when the nozzle sprayed water, continue to test the tank in the whole water Turn off the air compressor outlet valve and turn off the power switch Wash the residue tray clean, clean the work surface, and remove the distilled water from the test tank 4, target test first, close the outlet valve on the air compressor, turn the air compressor on the power, wait for the air compressor to reach the predetermined pressure Cut off the air compressor power supply, shut down the air source switch, open the outlet valve will be the left side of the instrument filter relief valve head up, according to the head instructions, "-"direction for booster," -"direction for decompression adjustment, so that the pressure gauge of the filter relief valve shows 0.2MPa Install the target, so that the distance between the back of the target and the melt spray filter specimen is 10mm, with the positioning screw on the bottom guide plate of the target to tighten the positioning 5, the left side of the instrument gas switch to the off (vertical off), turn on the power switch, press the "test fluid" key, pay attention to observe the test tank above the water pipe, the water return pipe has test fluid flow out, immediately press the "test fluid" key The upper test fluid is complete use the position ruler to determine the distance from the nozzle to the mask is (300 x 10 mm), the target seat is secured with a screw to turn open the instrument left gas source switch (knob level), adjust the instrument top of the precision relief valve, according to the valve head instructions, """ direction for pressurization, "-"direction for decompression adjustment, refer to table 2 to adjust the pressure gauge pressure, will be on the panel "injection time" Timer set to 1min or more, press the "start" key, release the nozzle positioning screw, up and down to adjust the nozzle, so that the injection of the test flow alignment of the center of the positioning target plate is directly shot, tighten the positioning screw, press the "stop" key for test liquids with a density of 1.005g/mL, the relationship between pressure gauge pressure and flow rate is shown in Table 2 set the "injection time" timer on the panel to 1s, press the "start" key, test liquid injection 1s after stopping the injection, with a balance to weigh the quality of the liquid ejected from the nozzle, to ensure that the quality of the ejected liquid in the range given in Table 2 If not in the range, the pressure value can be fine-tuned (the method of targeting the target hole refers to 6.2.4) so that the mass of the liquid passing through the target hole is within the range given in Table 2 the relationship between the pressure gauge pressure and the injection time of the is shown in Table 3, at different pressures, adjusts the injection time so that the volume of liquid through the target hole is 2mL for continuous injection 3 times, and 2.01g for test liquidwitht with a density of 1.005g/mL If the volume of liquid ejected from the nozzle (picked up from the placement specimen) is not 2mL, the injection time can be adjusted appropriately to ensure that the volume of the liquid passing through the target hole is 2mL (The test needs to be prepared for three sets of samples corresponding to 450 cm/s, 550 cm/s, and 635 cm/s injection speeds, tested separately according to different injection speeds to assess the resistance of the sample to synthetic blood penetration), and then tested according to the following steps.) seven, test step
    pull the upper left of the instrument sample clip pull hand, pull down the sample clip to the left The sample (standard requires the specimen to be tested in 60s after being removed from the pretreatment chamber) is fixed to the specimen clip, if the melting filter material there are folds, the fold splint is fixed to the specimen clip, to ensure that the target area is a single layer of material, to the sample center as the test target area Close the specimen clip press the "start" key, at this time, a certain amount of synthetic blood (surface tension (0.042 x 0.002)N/m) in the horizontal direction of the tested the target behind the , injection starts, while the time relay starts, to the set injection time, the instrument automatically spray stop 10s after the buzzer sounds, press the "Stop" button to open the specimen clip Under suitable lighting conditions, check the observation surface of the specimen for synthetic blood end of a trial If the test needs to continue, repeat step A-C until the full test is completed the test is completed, the test tank in the synthetic blood residue to remove clean, into distilled water, cleaning the entire line, when the nozzle sprayed water, continue to test the tank in the whole water Turn off the air compressor outlet valve and turn off the power switch Wash the residue tray clean, clean the work surface, and remove the distilled water from the test tank .
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