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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China National Textile and Apparel Council.
This standard is under the jurisdiction of the National Technical Committee on Textiles of Standardization Administration of China (SAC/TC 209).
Technical specification of children mask
1 Scope
This standard specifies the terms and definitions, classification and specification, technical requirements, test methods, inspection rules, packaging, marking, safety warning, and transportation and storage of children mask (hereinafter referred to as mask).
This standard is applicable to the marks worn by children aged 6~14 years, for filtering particulate matters in the air and blocking microorganisms, pollen, droplet, etc.
This standard is not applicable to masks with electric air supply (exhaust) devices.
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 2912.1 Textiles—Determination of formaldehyde—Part 1: Free and hydrolyzed formaldehyde (water extraction method)
GB/T 7573 Textiles—Determination of pH of aqueous extract
GB/T 14233.1-2008 Test methods for infusion, transfusion, injection equipments for medical use—Part 1: Chemical analysis methods
GB 15979-2002 Hygienic standard for disposable sanitary products
GB/T 17592 Textiles—Determination of the banned azo colourants
GB 18401-2010 National general safety technical code for textile products
GB/T 29865 Textiles—Tests for colour fastness—Colour fastness to rubbing—Small areas
GB/T 31702-2015 Testing method for sharpness of attached components on textile products
GB/T 32610-2016 Technical specification of daily protective mask
FZ/T 01137 Textiles—Determination of fluorescent brighteners
YY 0469-2011 Surgical mask
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
children protective mask
children mask with strong protective performance against particles such as microorganisms, droplet, dust and pollen
3.2
children hygiene mask
children mask with hygienic barrier property that can block transmission of particles such as microorganisms, droplet, dust and pollen
3.3
particle
solid and/or liquid particulate matter suspended in air
Note: For example, dust, fume, mist and microorganism.
[GB/T 12903-2008, Definition 5.1.16]
3.4
particle filtration efficiency
capacity of mask body for filtering particle under specified conditions
Note: It is expressed as a percentage.
3.5
bacterial filtration efficiency
capacity of mask body for filtering particle with bacteria under specified conditions
Note: It is expressed as a percentage.
3.6
particle protective performance
capacity of mask for filtering particle under specified conditions
Note: It is expressed as a percentage.
3.7
air penetration resistance
resistance value of air flowing through the mask body under specified conditions
Note: It is expressed in pascals (Pa).
4 Classification and specification
4.1 Classification
Children masks are classified by performance into children protective mask (F) and children hygiene mask (W).
4.2 Specification
Children masks are classified by head and face size of children of different age groups into small (S), medium (M) and large (L) ones.
5 Technical requirements
5.1 Basic requirements
5.1.1 Masks shall be able to cover the mouth, nose and lower jaw safely and firmly without peculiar smell and shall not significantly affect the visual field.
5.1.2 The raw materials for masks shall not use those that are known to cause skin irritation or other adverse reactions. They shall not undergo chlorine bleaching. The residual amount of other restricted substances shall meet the relevant requirements. The materials used shall be such that the masks do not break or deform during the normal service life.
Note: Mask suppliers should be able to prove that their materials meet the requirements and may prove that the textile materials used for masks meet the requirements of Class 4.2A in GB 31701-2015 by accepting inspection or providing test reports.
5.1.3 Ties shall not be used for masks. Adjustable mask strips should be used.
5.1.4 Masks shall be easy to wear and remove, and, in as worn condition, pose no obvious pressure or tenderness and have inconsiderable influence on the head movement.
5.1.5 For masks equipped with nose clips, the nose clips shall be made of plastic materials.
5.1.6 For masks equipped with breather valves, the components inside shall not fall off during normal use.
5.2 Appearance quality requirements
5.2.1 The inner material of masks in direct contact with the skin shall not be printed or dyed.
5.2.2 The mask surface shall be free from exposed metal, damage, oil stain, deformation and other obvious defects.
5.3 Requirements for inherent quality
With regard to inherent quality, masks shall in accordance with those specified in Table 1.
Table 1 Inherent quality indicators
Item Requirement
Children protective mask (F) Children hygiene mask (W)
Color fastness to dry rubbing a/Grade ≥4
Formaldehyde content/(mg/kg) ≤20
pH value 4.0~7.5
Decomposable carcinogenic aromatic amine dyes a Banned
Migratable fluorescent whitening agents Absent
Ethylene oxide residue /(μg/g) ≤2
Nose clip length b/cm ≥5.5
Folding resistance of nose clip b Not broken
Breaking strength of the mask strip and the connection between mask strip and mask body /N ≥15 ≥10
Expiratory resistance/ Pa ≤45 —
Inspiratory resistance/ Pa ≤45 —
Particle protective performance/% ≥90 —
Particle filtration efficiency/% ≥95 ≥90
Bacterial filtration efficiency/% — ≥95
Air penetration resistance/Pa — ≤30
Flame retardance Combustion time/s ≤5
Tip and edge sharpness c No accessible sharp tips and edges
Breather valve cover fastness d Free of slippage, fracture and deformation
Microorganism Coliforms Absent
Pathogenic pyogenic bacteria e Absent
Total fungal colony count/(CFU/g) ≤100
Total bacterial count/(CFU/g) ≤200
a Assessment scope only covers dyed and printed portions. See Annex C of GB 18401-2010 for a list of carcinogenic aromatic amines, with a limit less than or equal to 20 mg/kg.
b Only masks with nose clips are assessed.
c The test scope covers mask edge, breather valve, attached decorative parts and parts where sharp tips and edges may exist.
d Only masks equipped with breather valves are assessed.
e Referring to pseudomonas aeruginosa, staphylococcus aureus and streptococcus hemolyticus.
6 Test methods
6.1 Appearance inspection
Ten masks shall be sampled and tested by visual inspection. The inspection light shall be normal natural light. If a fluorescent lamp is used, its illuminance shall not be less than 400 lx.
6.2 Color fastness to dry rubbing
At the printed or dyed portions of the masks, specimens shall be cut in accordance with GB/T 29865.
6.3 Formaldehyde content
Specimens shall be cut at the mask body in accordance with GB/T 2912.1, and even cover printed or dyed portion, if any.
6.4 pH value
Specimens shall be cut on the contact layer between mask and face in accordance with GB/T 7573.
6.5 Decomposable carcinogenic aromatic amine dyes
At the printed or dyed portions of the masks, specimens shall be cut in accordance with GB/T 17592.
6.6 Migratable fluorescent whitening agents
Specimens shall be cut on the contact layer between mask and face in accordance with FZ/T 01137.
6.7 Ethylene oxide residue
It shall be tested in accordance with GB/T 14233.1-2008, Clause 9. Parallel samples shall be taken for testing, and cut from the mask body. If the test result of one portion is acceptable but that of the other not, the average of the two portions shall not be used. Other samples shall be taken and retested and the largest value shall be considered as the test result. The calculated result is expressed by relative content, with one decimal place reserved.
6.8 Nose clip length
Three samples are applied for the test, and measured with the general or special measuring tools with a precision of 0.1cm.
6.9 Folding resistance of nose clip
Select two samples, take the middle of the nose clip as the test point, and fold the nose clip in half 20 times by hand or other suitable instruments.
Note: For convenience of testing, the nose clip and surrounding covering may be cut out of the mask.
6.10 Breaking strength of the mask strip and the connection between mask strip and mask body
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and specification
5 Technical requirements
6 Test methods
7 Inspection rules
8 Packaging, marking, safety warning and transportation and storage
Annex A (Normative) Requirements for test head form
Bibliography
