GB/T 32610-2016Technical specification for daily protective masks (English PDF)

Foreword

This Standard is drafted in accordance with the rules given in GB/T 1.1-2009. This Standard is proposed by China National Textile and Apparel Council. This Standard is under the jurisdiction of National Technical Committee Textiles of Standardization Administration of China (SAC/TC 209). Drafting organizations of this Standard. China Nonwovens and Industrial Textiles Association, Jiangsu Quality Supervision and Inspection Center for Special Type Products of Safety Protecting, Beijing Municipal Institute of Labor Protection, Shanghai Sinotextiles Corporation Limited, Beijing Institute of Medical Device Testing, Donghua University, Tianjin Teda Filters Co., Ltd., Institute of Urban Environment under Chinese Academy of Sciences, Guangzhou Fiber Product Testing and Research Institute, Winner Medical Co., Ltd., Shenzhen Selen Science and Technology Co., Ltd., Unicharm Daily Necessities (China) Co., Ltd., Shenyang Baianda Personal Protective Equipment Co., Ltd., Yunnan Baiyao Group Co., Ltd., Honeywell Personal Protective Equipment (Shanghai) Co., Ltd., Kimberly-Clark (China) Co., Ltd., Foshan Nanhai Beautiful Medical Device Co., Ltd., Xinlong Holding (Group) Co., Ltd., Fujian Zhongrui Environmental Protection Technology Co., Ltd., Yuchuan Health Products (Shanghai) Co., Ltd., Wuhan Longfeixiang Technology Products Manufacturing Co., Ltd., Sichuan (Jiangsu) Paul Technology Co., Ltd. Main drafters of this Standard. Li Lingshen, Li Guimei, Yang Wenfen, Lu Bing, Zhao Danqing, Hu Guangyong, Ding Bin, Zhao Jinyu, Liu Ji, Zheng Yuming, Zhang Yuanhu, Xing Keqi, Zhang Fuquan, Wang Xiangqin, Gong Guozhuo, Yue Weihua, Chen Shu, Li Jianquan, Chen Jinyu, Xie Jingwei, Gao Ming, Wang Jiajun, Zhang Xinyue, Chen Zhen, Luo Jun, Zhang Peng, Xu Hong, Wang Lu, Lu Yuzheng, Chen Longmin, Liu Sheng, Hao Runlin, Huang He, Yang Jian, Yin Xia. Technical specification of daily protective mask

1 Scope

China's national technical specification for daily protective masks. It specifies the terms and definitions, the grading, the technical requirements, the test methods, the inspection rules and the packaging, marking, storage and transport for masks worn by the public in daily life, with normative annexes giving the test method for filter efficiency and the test method for particle protection performance, and an informative annex on wearing environments and precautions. It was written for a specific problem. China already had standards for industrial respirators, worn by trained workers who are fit tested and medically screened, and for surgical masks, worn to protect a patient from the wearer rather than the wearer from the air. Neither covered the mask that an ordinary person buys and wears in a city on a polluted day, and the market filled with products making claims that nothing tested. This standard fills that gap, and it does so with two graded scales rather than one. The filter efficiency grades describe what the filter material stops, and the protection grades describe what the mask as worn actually achieves - which are different quantities, because a mask that leaks around the face delivers far less protection than its material would suggest. Grading the protection separately, and testing it on a head form with the mask fitted, is the provision that most distinguishes this standard from a filter specification. The protection levels are expressed in terms of the ambient air quality the mask is intended for, which is what makes the grading meaningful to a member of the public choosing one. Issued on 25 April 2016 and in force since 1 November 2016.

This Standard specifies the terms and definitions, grading, technical requirements, test methods, inspection rules, packaging, marking, storage and transportation requirements of daily protective masks. This Standard applies to protective masks wore in the daily life to filter out particulate matters in the air pollution environment. This Standard does not apply to respiratory protection products used in hypoxic environments, underwater operations, escaping, fire protection, medical and industrial dust prevention and other special industries, nor for respiratory protection products for infants and children.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the dated edition cited applies. For undated references, the latest edition of the referenced document (including all amendments) applies.

GB 2890-2009 Respiratory protection - Non-powered air-purifying respirators

GB/T 2912.1 Textiles - Determination of formaldehyde - Part

3 Terms and definitions

For the purpose of this document, the following terms and definitions apply.

3.1 Particulate matter (PM2.5) Particulate matters in the ambient air with aerodynamic equivalent diameter of less than or equal to 2.5 µm, also known as fine particulate matters. [GB 3095-2012, definition 3.4]

3.2 Filter efficiency Under the specified conditions, the ability of the mask body to filter out particulate matters, expressed as percentages.

3.3 Particle protective performance Under the specified conditions, the ability of the mask to block particulate matters, expressed as percentages.

4 Grading

The particle protective performance of masks is divided from high to low into Grade A, Grade B, Grade C and Grade D; the ambient air quality to which each grade of masks is applicable is as shown in Table

1.All grades of masks shall be able to reduce the concentration of inhaled particulate matters (PM2.5) to <= 75 µg/m3 (the ambient air quality index category is good or above) in the corresponding air pollution environment.

6 Test methods

6.1 Visual inspection EXTRACT of 10 masks, INSPECT them using visual inspection method. The inspection light is subject to normal natural light; if fluorescent lighting is used, the illumination shall be not less than 400 lx.

6.2 Color fastness to rubbing TEST according to the specifications of GB/T 29865.For color fastness to dry rubbing, the outer layer of the mask is tested; for color fastness to wet rubbing, the layer of the mask contacting with human face is tested.

6.3 Formaldehyde content TEST according to the specifications of GB/T 2912.1.

6.4 pH value TEST according to the specifications of GB/T 7573.The sample is cut from the layer of the mask contacting with human face.

6.5 Decomposable carcinogenic aromatic amine dyes TEST according to the specifications of GB/T 17592 and GB/T 23344. NOTE. In general, test according to GB/T 17592 first, when aniline and/or 1,4- phenylenediamine are detected, test according to GB/T 23344.

6.6 Ethylene oxide residues According to the product identification, the mask treated with ethylene oxide is tested according to the specifications of Clause 9 in GB/T 14233.1-2008.TAKE a parallel sample to test, and the sample is cut from the mask body. If one of the test results is qualified, and another test result is unqualified, the mean is not calculated; it shall resample to test, and the highest value is taken as the test result. The calculation result is expressed as relative content, accurate to one decimal place.

7 Inspection rules

7.1 Sampling Products of the same batch and the same specification (model) in delivery batch number are regarded as a test batch. Randomly extract the corresponding quantity of samples from each test batch according to the test requirements. When the delivery number of a same delivery batch is greater than 100 000, the number of samples is doubled.

8 Packaging, marking, storage and transportation

8.1 Packaging Each mask shall be sealed and packaged.

8.2 Marking Each package unit shall have an inspection certificate, and on the obvious part there shall be a clearly identifiable marking, which shall contain the following contents.

a) manufacturer's name and address;

b) product name;

c) main raw materials (inner, outer, filter);

d) implemented standard number;

e) product's particle protection performance grade;

f) product specification (small, medium, large);

g) instructions for use (wear methods, precautions, etc.);

h) date of manufacture, recommended service time (hours) and storage period;

i) if disinfection is adopted, disinfection shall be indicated.

8.3 Storage and transportation Products in the storage and transportation shall be sealed, no damage, no pollution, not damp, and be prevent from fire, rain, acid, alkali and direct light.

Annex A

(normative) Test method for filter efficiency A.1 Scope This annex specifies the test method for the filter efficiency of masks. This annex applies to daily protective masks. A.2 Test principle GENERATE aerosol particles having a certain concentration and particle size distribution by the aerosol generator, and PASS them through the mask body at specific gas flow; USE appropriate particulate matter testing device to test the concentration of the particulate matter before and after passing through the mask body. The filter efficiency of the mask body on the particulate matter is evaluated by the percentage of particulate matter concentration decreases after the aerosol particles passing through the mask body. A.3 Sample and pretreatment A.3.1 TAKE 16 samples, DIVIDE into two groups; one group uses salt media to test, and one group uses oily media to test. 5 of each group are untreated samples and 3 are samples pretreated according to A.3.2. A.3.2 Temperature and humidity pretreatment A.3.2.1 Pretreatment equipment A.3.2.1.1 The technical performance of damp heat test chamber shall meet the requirements of GB/T 10586. A.3.2.1.2 The technical performance of high temperature test chamber shall meet the requirements of GB/T 11158. A.3.2.1.3 The technical performance of low temperature test chamber shall meet the requirements of GB/T 10589. A.3.2.2 Pretreatment method TAKE the sample from the original package, TREAT them in the following order.

a) PLACE in the environment of (38 ± 2.5) °C and (85 ± 5) % relative humidity for (24 ± 1) h;

b) PLACE in the dry environment of (70 ± 3) °C (24 ± 1) h;

c) PLACE in in the environment of (-30 ± 3) °C for (24 ± 1) h. Before proceeding to each step, the sample temperature shall be returned to room temperature for at least 4 hours before further testing. After pretreatment, the sample shall be placed in a hermetic container and tested within 10 h. A.4 Test equipment A.4.1 Filter efficiency testing system for NaCl particulate matters The requirements for the filter efficiency testing system for NaCl particulate matters are as follows:

a) the concentration of NaCl particulate matter is not more than 30 mg/m3, the count median diameter (CMD) is (0.075 ± 0.020) µm, and the geometric standard deviation of particle size distribution is not more than 1.86;

b) the dynamic range of particulate matter testing is

0.001 mg/m3 ~ 100 mg/m3, with the accuracy of 1 %.

c) the testing flow rate range is 30 L/min ~ 100 L/min, with the accuracy of 2 %;

d) the testing range of filter efficiency is 0 ~ 99.999 %;