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YY/T 0691-2008

Chinese Standard: 'YY/T 0691-2008'
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YY/T 0691-2008English200 Add to Cart 0--10 minutes. Auto immediate delivery. Clothing for protection against infectious agents. Medical face masks. Test method for resistance against penetration by synthetic blood (fixed volume, horizontally projected) Valid YY/T 0691-2008
YY/T 0691-2008Chinese20 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]

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BASIC DATA
Standard ID YY/T 0691-2008 (YY/T0691-2008)
Description (Translated English) Clothing for protection against infectious agents. Medical face masks. Test method for resistance against penetration by synthetic blood (fixed volume, horizontally projected)
Sector / Industry Medical Device & Pharmaceutical Industry Standard (Recommended)
Classification of Chinese Standard C40
Classification of International Standard 11.100
Word Count Estimation 16,199
Date of Issue 2008-10-17
Date of Implementation 2010-01-01
Quoted Standard GB/T 2828.1-2003; GB/T 5549-1990
Adopted Standard ISO 22609-2004, IDT
Drafting Organization Beijing Medical Device Testing
Administrative Organization National Standardization Technical Committee of Medical clinical testing laboratories and in vitro diagnostic systems
Regulation (derived from) SFDA [2008] No. 605
Proposing organization State Food and Drug Administration
Issuing agency(ies) China Food and Drug Administration
Summary This standard specifies the testing of medical masks anti-penetration properties of synthetic blood splash laboratory test methods. This standard is mainly used to evaluate the production of medical face mask materials or certain structural performance. This standard does not evaluate medical mask design, structure, interface, or other medical masks can affect the overall protection capabilities (such as filtration efficiency and pressure drop) factor. This test does not evaluate the permeability of medical mask medical mask or other breathing comfort affect performance. This test evaluates the performance of medical protective masks. This test does not assess medical mask against airborne or deposited on the surface of medical masks spread through bodily fluids form an aerosol protection.

If the density of the liquid is known, the volume of the ejected liquid is easier to measure by measuring the mass of the liquid and calculating it according to formula (B.9).
In the formula.
Q --- the volume of liquid ejected;
ρ --- the density of the test liquid.
If the density of the test liquid is 1.005 g/cm3, the spray volume of 2 mL should be 2.010 g.
B. 8 Need attention, such as B. 2c), formula (B.8) and Table B. The liquid velocity in 2 is assumed to be constant throughout the ejection process.
This assumption is valid for the case where the ejection distance is only the thickness of the blood vessel wall. But for this test device, blood flows through a long tube,
Passing through the valve and spray head, friction creates resistance during this process. Therefore, when the pressure in the container is kept constant,
It takes about 0.1s to descend to a steady state flow. This situation can be observed by observing the position where the sprayed liquid reaches the sample.
Measured. The place where the initial spray was made was more than 1 cm higher than the position where the steady-state liquid was sprayed.
YY/T 0691-2008/ISO 22609..2004
Using this change in spraying position in the height direction, it is possible to place a small hole (aperture 0.5cm) between the spraying head and the mask.
Set the target plate and let only steady state liquid be sprayed onto the mask sample. If you adjust the spray direction, only let the steady-state liquid pass through the small holes on the target plate.
The body will be blocked by the plate, and it sprays above the small hole of the target plate.
From equations (B.7) and (B.9), equation (B.10) can be obtained to estimate the steady-state liquid flow rate.
In the formula.
Equation (B.10) can be rewritten into the form of Equation (B.11).
(B.11)
among them
[2] BARACH, P. G. , CULLEN, B. F. anandstoeting, R. K. HandbokorClinicaAnneste-
sia, J. B. Lippincott Co. , Philadelphia (1994) Appendix A.
[3] TELFORD, G. L. and ZUEBBEMAN, E. J. AssassinityRiskoffBloodExposureinop
EroticRom, AmericanJounalofInformationControl, (21/6) December.1993, p. 351-356.
[4] ASTF18862-00a, StanderTestMeditorForrestMediaFocityMedicalFaceMaskostPenetra-
tioneBySystemBlood (HorizontalProfessionalFileFollowVolumeAtaKnownVelocity).
[5] ISO 16603, Cloning for Proceedings, Internet, Consignment, Broadcasting, Broadcasting-Fluids-Determina-
tiofofisistanceoffrectecivelcopyingclosing chronological datapointing network traversing data collection data collection-floods-test
metdusching syndrome.
[6] ISO 16604, Cloning for Proceedings, Internet, Consignment, Broadcasting, Broadcasting, and Florida-Department-
tiofrosistance-property-receiving-copying-history-material-repair-reporting-relationship-by-blood-broadline-patterns-test
methoduschingPhi-X-174bacherophage.
2002.
OSI/8000-
T/Y

If the density of the liquid is known, the volume of the ejected liquid is easier to measure by measuring the mass of the liquid and calculating it according to formula (B.9).
In the formula.
Q --- the volume of liquid ejected;
ρ --- the density of the test liquid.
If the density of the test liquid is 1.005 g/cm3, the spray volume of 2 mL should be 2.010 g.
B. 8 Need attention, such as B. 2c), formula (B.8) and Table B. The liquid velocity in 2 is assumed to be constant throughout the ejection process.
This assumption is valid for the case where the ejection distance is only the thickness of the blood vessel wall. But for this test device, blood flows through a long tube,
Passing through the valve and spray head, friction creates resistance during this process. Therefore, when the pressure in the container is kept constant,
It takes about 0.1s to descend to a steady state flow. This situation can be observed by observing the position where the sprayed liquid reaches the sample.
Measured. The place where the initial spray was made was more than 1 cm higher than the position where the steady-state liquid was sprayed.
YY/T 0691-2008/ISO 22609..2004
Using this change in spraying position in the height direction, it is possible to place a small hole (aperture 0.5cm) between the spraying head and the mask.
Set the target plate and let only steady state liquid be sprayed onto the mask sample. If you adjust the spray direction, only let the steady-state liquid pass through the small holes on the target plate.
The body will be blocked by the plate, and it sprays above the small hole of the target plate.
From equations (B.7) and (B.9), equation (B.10) can be obtained to estimate the steady-state liquid flow rate.
In the formula.
Equation (B.10) can be rewritten into the form of Equation (B.11).
(B.11)
among them
[2] BARACH, P. G. , CULLEN, B. F. anandstoeting, R. K. HandbokorClinicaAnneste-
sia, J. B. Lippincott Co. , Philadelphia (1994) Appendix A.
[3] TELFORD, G. L. and ZUEBBEMAN, E. J. AssassinityRiskoffBloodExposureinop
EroticRom, AmericanJounalofInformationControl, (21/6) December.1993, p. 351-356.
[4] ASTF18862-00a, StanderTestMeditorForrestMediaFocityMedicalFaceMaskostPenetra-
tioneBySystemBlood (HorizontalProfessionalFileFollowVolumeAtaKnownVelocity).
[5......
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