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YY 0469-2023: PDF in English
YY 0469-2023
YY
MEDICAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 11.140
CCS C 48
Replacing YY 0469-2011
Surgical mask
ISSUED ON: NOVEMBER 22, 2023
IMPLEMENTED ON: DECEMBER 01, 2026
Issued by: National Medical Products Administration
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Technical requirements ... 6
5 Test methods ... 8
6 Marks ... 12
7 Marks, transportation and storage ... 13
Annex A (normative) Preparation method for synthetic blood ... 14
Annex B (normative) Test method for bacterial filtration efficiency (BFE) ... 15
Bibliography ... 21
Surgical mask
1 Scope
This document specifies the technical requirements, test methods, marks, packaging,
transportation and storage for surgical masks.
This document is applicable to disposable medical masks worn by medical staff in
medical environments with potential risks of blood, body fluid, and secretion
contamination and in invasive operating environments.
This document does not apply to protective masks in medical and other working
environments.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 14233.1-2022, Test methods for infusion, transfusion, injection equipment for
medical use -- Part 1: Chemical analysis methods
GB/T 16886.5, Biological evaluation of medical devices -- Part 5: Tests for in vitro
cytotoxicity
GB/T 16886.10, Biological evaluation of medical devices -- Part 10: Tests for
irritation and skin sensitization
GB/T 16886.12, Biological evaluation of medical devices -- Part 12: Sample
preparation and reference materials
YY/T 0691-2008, Single-use medical face mask
Part IV of Edition 2020 of the Pharmacopoeia of the People's Republic of China
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 surgical mask
A barrier that can cover the wearer's mouth, nose and jaw, and is used to prevent
pathogenic microorganisms and droplets exhaled by the wearer from directly
contaminating the patient or the surrounding environment, and to prevent the patient's
body fluids, blood and other splashes from penetrating the mask and affecting the
wearer. cause some damages.
3.2 synthetic blood
A mixture of red dye, surfactant, thickener, and distilled water whose surface tension
and viscosity can represent blood and other body fluids and have a color similar to
blood.
NOTE: The synthetic blood used in the tests in this document does not have all the characteristics
of blood or body fluids, such as polarity (wetness), coagulability, and cellular material.
3.3 particle filtration efficiency; PFE
Under specified testing conditions, the percentage of particulate matter filtered out by
the mask.
3.4 bacterial filtration efficiency; BFE
Under specified testing conditions, the mask's ability to filter out bacteria-containing
suspended particles.
NOTE: Usually, it is expressed as a percentage.
3.5 flame retardation properties
The ability to prevent itself from being ignited, flaming and smoldering.
3.6 airflow resistance
The resistance of the mask under the specified area and specified flow rate.
NOTE: It is expressed as pressure difference per unit area.
4 Technical requirements
4.1 Appearance
The appearance of the mask shall be neat and in good shape. There shall be no damage
or stains on the surface.
4.2 Structure and dimension
After the mask is worn, it shall cover the wearer's mouth, nose and chin. It shall comply
with the design dimensions and allowable deviations specified by the manufacturer. The
design of the mask shall be able to distinguish the direction of its inner and outer sides.
4.3 Nose clip
4.3.1 The mask shall be equipped with a nose clip or a design that replaces the nose clip.
4.3.2 Nose clips shall be made of malleable material. It shall be safe and secure, with
no sharp protrusions. The length shall be no less than 8.0 cm. If a design is used to
replace the nose clip, the design shall be able to fix the nose clip and provide a basic
seal when worn.
4.4 Mask strap
4.4.1 Earhook mask
The sum of the breaking strengths of each mask strap and the two connection points
between each mask strap and the mask body shall not be less than 15 N.
4.4.2 Strap mask
The breaking strength of each mask strap and the connection between each mask strap
and the mask body shall be no less than 10 N. If there is no fixed connection point
between the mask strap and the mask body, the breaking strength of each mask strap
shall be no less than 10 N.
4.5 Resistance to synthetic blood penetration
After 2 mL of synthetic blood is sprayed onto the outer side of the mask at a pressure
of 16.0 kPa (120 mmHg), there shall be no penetration on the inner side of the mask.
4.6 Filtration efficiency
4.6.1 Bacterial filtration efficiency (BFE)
The bacterial filtration efficiency of the mask shall be no less than 98%.
4.6.2 Particle filtration efficiency (PFE)
The filtration efficiency of the mask against non-oily particles shall be no less than 80%.
4.7 Airflow resistance
The airflow resistance for gas exchange on both sides of the mask shall be less than 60
Pa.
4.8 Flame retardation properties
Mask materials shall be made of non-flammable materials. The mask shall not burn for
more than 5 s after leaving the flame.
4.9 Microbial indicators
5.8 Flame retardation properties
Number of samples: Use at least 3 samples for testing.
Test process: The distance between the top of the burner and the lowest part of the
sample is set to (20±2) mm. Set the flame height to (40±4) mm. The temperature of the
flame at (20±2) mm above the burner tip is set to (800±50)℃.
Place the sample on the headform. Set the linear speed of the head model at the tip of
the nose to (60±5) mm/s. Record the effect of the sample after one pass through the
flame. Report the sum of the afterburning time (the time the material continues to burn
with flame after the ignition source is removed) and the smoldering time (the time the
material continues to burn without flame after the flaming combustion terminates, or
after the ignition source is removed).
5.9 Microbial indicators
5.9.1 Microbiological limits
The test is conducted in accordance with the membrane filtration method specified in
Microbial Enumeration Method in Microbial Limit Examination of Non-sterile
Products (General Chapter 1105) in Part IV of Edition 2020 of the Pharmacopoeia of
the People's Republic of China. The results for total aerobic bacteria, mold and yeast
counts are added together.
Preparation of test solution: At least 2 smallest packages are randomly selected. Take
no less than 10 g of the test sample. Cut into pieces and use a diluent containing 0.1%
(mL/mL) polysorbate 80 (or other non-bacterial surfactant), such as pH 7.0 sterile
sodium chloride-peptone buffer, or pH 7.2 phosphate buffer, or 0.9% sterile sodium
chloride solution. Prepare a 1:50 (g/mL) test solution. Mix thoroughly.
5.9.2 Sterility
Carry out in accordance with the test methods specified in the Sterility Inspection Act
(General Chapter 1101) in Part IV of Edition 2020 of the Pharmacopoeia of the People's
Republic of China. The treatment of the test article and the inoculation culture medium
shall be carried out according to the provisions of dressing the test article in the direct
inoculation method.
5.10 Residual amount of ethylene oxide
Conduct the test in accordance with the provisions of 9.4 in GB/T 14233.1-2022.
5.11 Biocompatibility
5.11.1 Sample preparation
Take the mask tape and the main mask material and mix them according to the area
ratio of 1:3 as a test sample. The leach solution of this test sample is prepared in
accordance with the requirements of GB/T 16886.12.
5.11.2 Cytotoxicity
After the test sample extract is diluted 2 times with complete cell culture medium, the
cytotoxicity test is carried out according to the MTT method in GB/T 16886.5.
5.11.3 Skin irritation
The test is conducted using the animal skin irritation test specified in GB/T 16886.10.
5.11.4 Delayed hypersensitivity reaction
The maximum dose for delayed hypersensitivity reaction in guinea pigs specified in
GB/T 16886.10 is used for the test.
6 Marks
The minimum sales unit of masks shall have clear Chinese marks. The mark shall at
least include:
a) product name;
b) model, specifications and information showing dimensions;
c) production date and/or batch number;
d) use period or expiry date;
e) manufacturer’s name and contact information;
f) implementation standard number or product technical requirement number;
g) product registration certificate number;
h) identification of the inner and outer sides and instructions on how to wear them;
i) storage conditions;
j) "single-use" words or symbols;
k) if it is a sterilized product, there shall be a corresponding sterilization mark and
the sterilization method used;
l) product purpose.
Annex A
(normative)
Preparation method for synthetic blood
A.1 Reagents
The formula for synthetic blood consists of the following:
Sodium carboxymethyl cellulose (CMC, medium viscosity): 2 g
Tween 20 or equivalent other surfactant: 0.06 g or an amount of other surfactant
Sodium chloride (analytical grade): 4.5 g
Methylisothiazolone (MIT): 0.5 g
Amaranth dye: 1.0 g
Distilled water: add to 1 L
A.2 Preparation method
Dissolve sodium carboxymethylcellulose in 0.5 L of water. Mix on a magnetic stirrer
until completely dissolved. Weigh Tween 20 or equivalent other surfactant in a small
beaker and add water and mix well.
Add Tween 20 solution or equivalent other surfactant to the above solution of sodium
carboxymethyl cellulose. Wash the beaker several times with distilled water and add to
the previous solution.
Dissolve sodium chloride in the solution. Add MIT and amaranth dye. Dilute with water
to 1000 g.
Adjust the pH of the synthetic blood to 7.3±0.1 with 2.5 mol/L sodium hydroxide
solution.
Use a surface tensiometer to measure the surface tension of synthetic blood. The result
shall be (0.042±0.002) N/m. If it is outside this range, it cannot be used.
Erlenmeyer flask (250 mL~500 mL). Petri dish. Pipettes (1 mL, 5 mL, 10 mL). Sterile
glass bottle (100 mL~500 mL). Inoculation loop. Test tube stopper. Test tube (16
mm×150 mm).
B.1.3 Reagents
B.1.3.1 The formula of tryptic soy peptone agar medium (TSA) is as follows (taking 1
000 mL as an example):
a) Tryptone: 15 g;
b) Soybean papain hydrolysate: 5 g;
c) Sodium chloride: 5 g;
d) Agar: 15 g;
e) Final pH 7.3±0.2 (25℃).
B.1.3.2 The formula of tryptic soybean liquid medium (TSB) is as follows (taking 1
000 mL as an example):
a) Tryptone: 17 g;
b) Soybean papain hydrolysate: 3 g;
c) Sodium chloride: 5 g;
d) Dipotassium hydrogen phosphate: 2.5 g;
e) Glucose: 2.5 g;
f) Final pH 7.3±0.2 (25℃).
B.1.3.3 The formula of peptone water is as follows (taking 1 000 mL as an example):
a) Peptone: 10 g;
b) Sodium chloride: 5 g;
c) Final pH 7.2±0.2 (25℃).
B.1.3.4 Staphylococcus aureus (ATCC 6538).
B.2 Sample pretreatment
Before the test, place the sample in an environment with a temperature of (21±5)℃ and
a relative humidity of (85±5)% for at least 4 h.
B.3 Preparation of bacterial suspension for testing
Staphylococcus aureus (ATCC 6538) is inoculated into an appropriate amount of TSB
medium. Incubate at (37±2)℃ for (24±2) h with shaking. Dilute the above culture with
peptone water to a concentration of approximately 5×105 CFU/mL.
B.4 Test procedures
Do not put the sample into the test system first. The gas flow rate through the sampler
is controlled at 28.3 L/min. The time for delivering bacterial suspension to the nebulizer
is set to 1 min. The air pressure and sampler run time are set to 2 min. Collect bacterial
aerosol onto TSA medium as a positive control. After the test is completed, take out the
agar plate and mark it with the layer number. Place a new agar plate. Clamp the test
sample to the upper end of the sampler, with the inside of the mask facing the aerosol.
Follow the procedure above for sampling. After a batch of test samples has been tested,
test the positive control test again. Finally, collect the air sample in the aerosol chamber
for 2 min as a negative control. During this process, bacterial suspension cannot be
delivered to the nebulizer.
A test system (Figure B.2) that can perform positive control collection and sample
collection at the same time can also be used, but the consistency between channels shall
be ensured.
Incubate the agar plate at (37±2)°C for (48±4)h. The colony-forming units formed by
the aerosol of bacterial particles are then counted (r). Use the sampling hole conversion
table (Table B.1) to convert it to the corrected particle count value P (levels 1 and 2 are
not corrected). The sum of the values at all levels of the positive control group is used
as the positive control value to determine the average level of bacterial aerosol particles
delivered to the test sample. The calculation method for the test sample group is the
same as that for the positive control group. The number of positive control bacteria shall
be controlled between 1700 CFU and 3000 CFU. Otherwise, the spray conditions (spray
flow rate or concentration and volume of the transported bacterial solution) need to be
adjusted. The average particle diameter (MPS) of bacterial aerosol is calculated
according to formula (B.1) and shall be (3.0±0.3) μm. Negative controls shall have no
colony growth.
......

BASIC DATA
Standard ID YY 0469-2023 (YY0469-2023)
Description (Translated English) Surgical mask
Sector / Industry Medical Device & Pharmaceutical Industry Standard
Classification of Chinese Standard C48
Classification of International Standard 11.140
Word Count Estimation -2,-13
Date of Issue 2023-11-22
Date of Implementation 2026-12-01
Older Standard (superseded by this standard) YY 0469-2011
Administrative Organization National Medical Protective Equipment Standardization Working Group (SAC/SWG 30)
Proposing organization State Drug Administration
Issuing agency(ies) State Food and Drug Administration
Summary This standard specifies the technical requirements, test methods, marking, packaging, transportation and storage of medical surgical masks. This standard applies to disposable medical masks worn by medical staff in medical environments and invasive operating environments that contain potential risks of blood, body fluid, and secretion contamination. This standard does not apply to protective masks in medical and other working environments.