Many parents have found that when children wear masks, they often "open their mouth to breathe", and some children have difficulty breathing with masks. In response to this phenomenon, Jin Xiangyu said that wearing a mask is like setting up a "filter barrier" for one's respiratory system. This barrier should not only block particles and droplets, but also ensure smooth breathing. The strength of children's lungs is relatively weak. The first requirement of children's mask wearing for a long time is "ventilation comfort".

In the mask group standard, it is clearly stipulated that the ventilation resistance of adult masks must be less than or equal to 49 PA, and that of children masks must be less than or equal to 30 PA. Jin Xiangyu specially reminded parents not to blindly choose N95 masks and medical surgical masks. "The ventilation resistance of these masks is about 300 Pa. although they have high protection performance, they are not conducive to ventilation. They are not the best choice for children's daily protection."

But if the ventilation resistance is small, will it affect the protection of the mask? It is understood that the protection standards for adult masks and children's masks in the group standards are "equal" and equally strict. The standard stipulates that the filtration efficiency of children's masks for dust, droplets, aerosols and other particles is not less than 90%, and the bacterial filtration efficiency is not less than 95%, which can meet the needs of ordinary consumers for bacterial protection after wearing masks. At the same time, considering that children are lively and active and have poor self-processing ability, the flame retardant performance of masks for children is also specified. The index refers to yy0469-2011 medical surgical masks, and the burning time of masks after leaving the flame is not more than 5 seconds.

In addition, according to the new standard, the ear hanging type mask belt should be used for children's masks. The mask belt should not have free end, detachable small parts, etc., and there should be no sharp points and edges that can be touched. The raw materials of masks for children should not be recycled. If you choose to buy qualified and compliant children's masks, you can have both safety and comfort.

What are the characteristics of medical surgical mask material

6chem: what are the characteristics of medical surgical mask materials? Medical surgical masks are generally used in high demand environment such as medical clinic, laboratory and operating room. They are worn by medical staff. The safety factor is relatively high, and the resistance to bacteria and virus is strong. Medical surgical masks can also be used to prevent influenza.

Material characteristics

Melt blown cloth, which uses polypropylene as the main raw material, and the fiber diameter can reach 0.5-10 microns. These ultra-fine fibers with unique capillary structure increase the number and surface area of fibers per unit area, so that the melt blown cloth has good filterability, shielding, thermal insulation and oil absorption. It can be used for air and liquid filtering materials, isolation materials, absorption materials, mask materials, mask materials, etc Thermal insulation materials and test cloth and other fields. Spunbonded non-woven fabric: after the polymer has been extruded and stretched to form continuous filaments, the filaments are laid into a net, and then the net is made into non-woven fabric by self bonding, thermal bonding, chemical bonding or mechanical reinforcement. High strength, high temperature resistance (can be used in 150 ℃ environment for a long time), aging resistance, UV resistance, high elongation, good stability and permeability, corrosion resistance, sound insulation, moth proof, non-toxic.

The main products of spunbonded non-woven fabrics are polypropylene polyester (long fiber, short fiber). The most common and most commonly used is the application of non-woven bags, non-woven packaging and so on, and it is easy to identify, because the rolling point of spunbonded non-woven fabrics is rhombic.

At the application level, it can also make flower packing cloth, bag cloth and so on, with the characteristics of wear resistance, firmness, good handle and so on, making it the best choice for making such products.

usage method

1. Carefully cover mouth and nose with mask and fasten them to reduce the gap between face and mask as much as possible;

2. When using, avoid touching the mask - after touching the used mask, for example, to remove or clean the mask, wash hands with soap and water or alcohol hand cleaner;

3. Replace the mask with a new clean and dry one after it is damp or contaminated with moisture;

4. Do not reuse disposable masks. Disposable masks should be discarded after each use and disposed immediately after removal.

5, although there are other shelters, instead of standard medical masks (such as cotton face masks, headscarves, mask paper, shelter nose and mouth cloth), there is a lack of information about the effectiveness of such materials.

6. If such alternative shields are used, they should only be used once, or in the case of cotton masks, they should be thoroughly cleaned after each use (i.e. washed with household detergent at room temperature). It should be removed immediately after nursing the patient. Wash hands immediately after removing the mask.

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