1. Classification and specifications of children's masks

In the provisions of GB / T 38880-2020, children's masks are divided into two categories: child hygiene masks and child protective masks. In terms of specifications, the size is divided into large size, medium size, and small size, which are denoted by L, M, and S, respectively. Children's masks are divided into three-year-old to six-year-old and six-year-old to two-year-old children's masks because of children's physiological characteristics, especially the difference in respiratory tidal volume and respiratory resistance of children of different ages.

2. Children's mask testing items

The children's mask testing project mainly stipulates from three aspects: basic requirements, appearance requirements and internal quality requirements.

2.1. Basic testing requirements:

Children's masks should be able to be equipped with nose clips and use plastic materials to protect the mouth and nose firmly; they should not have exposed metal objects and sharp tips or edges that may cause child injury; raw materials require no odor, renewable materials cannot be used, pass Toxicology skin irritation test, hazardous substance limit and other requirements, chlorine bleaching is not allowed; children ’s masks cannot be laced, cannot have detachable small parts, are easy to carry and remove, and when worn, there must be no feeling of pressure and tenderness. The impact of the activity should be small.

2.2. Appearance inspection requirements:

The appearance of children's masks requires that the surface should not be damaged, oil stains, deformation and other obvious defects, and the materials that the masks contact with the skin cannot be dyed.

2.3. Internal quality inspection items:

Color fastness to dry rubbing, color fastness to saliva, formaldehyde content, pH, decomposable carcinogenic aromatic amine dyes, residual ethylene oxide, length of nose clip, mask band and the connection between mask band and mask body , Inhalation resistance, Exhalation resistance, protective effect, filtration efficiency, ventilation resistance, visual field under the mask, flame retardant performance, fastness of breathing valve cover, microbial index. The microbial detection indicators mainly include coliform bacteria, pathogenic pyogenic bacteria (Pseudomonas aeruginosa, Staphylococcus aureus, and hemolytic streptococcus), the total number of fungal colonies, and the total number of bacterial colonies.