Medical surgical mask material characteristics
Melt-blown cloth, cloth of melt-blown polypropylene as the main raw material, the fiber can reach 0.5-10 microns in diameter, the capillary structure of these unique ultra-fine fibers increase the number of fibers per unit area and the surface area, so that the melt-blown fabric has the very good filterability, shielding, insulation, and oil absorption, can be used for air and liquid filtration material, insulation material, absorbing material, masks, heat preservation material, and try to wipe cloth, etc. Spun-bonded non-woven cloth: is in the polymer has been extruded, stretch and form continuous filament, filament laid into a network, fiber network after its own bonding, thermal bonding, chemical bonding or mechanical reinforcement methods, so that the fiber network into non-woven cloth. High strength, high temperature resistance (can be used in the environment of 150℃ for a long time), aging resistance, uv resistance, high elongation, stability and good permeability, corrosion resistance, sound insulation, anti-moth, non-toxic.
The main products of spunbonded non woven fabrics are polypropylene polyester (long fiber, staple fiber). The most common and most commonly used applications are non-woven bags, non-woven packaging, etc., and it is easy to identify, because the rolling point of spunbonded non-woven fabrics is diamond.
The application layer can also be used to make flower packaging cloth, bags cloth, etc., wear resistance, strong handle and so on, so that it is the best choice for making such products.
Usage of medical surgical mask
1. Cover your mouth and nose with a medical surgical mask and fasten them to minimize the gap between your face and the mask;
2. When using medical surgical mask, avoid touching the mask — after touching the used mask, for example, to remove or clean the mask, wash hands with soap and water or with alcohol hand sanitizer;
3. Change into a new clean and dry mask after the mask is damp or damp;
4. Do not reuse disposable masks. Disposable masks should be discarded after each use and disposed of immediately after removal.
5. There is a lack of information on the effectiveness of such materials, although there are other alternatives to standard medical surgical mask (e.g., cotton masks, turbans, mask paper, and strips covering the nose and mouth).
6. If such an alternative shelter is used, it should be used only once, or if it is a cotton mask, it should be thoroughly cleaned after each use (that is, cleaned with household detergent at room temperature). It should be removed immediately after caring for the patient. Wash hands immediately after removing the mask.
Specification of non woven surgical mask:
A) the size of the center part of the rectangular mask after it is expanded: the length shall not be less than 17cm, and the width shall not be less than 17cm;
B) size of closed arch mask: the transverse diameter should not be less than 14cm, and the longitudinal diameter should not be less than 14cm.
C) nose clip is made of flexible plastic material with a length not less than 8.5cm.
D) three-layer non-woven mask size: 17.5mmx19.5mm
Non woven surgical mask better ventilation than other fabrics, heat preservation, water absorption, water resistance is also good; non woven surgical mask can effectively prevent the fine dust in the air, especially the barrier efficiency of respirable dust below 2.5 microns is particularly obvious, the bacterial filtration efficiency of more than 95%, can effectively protect human health, which is the most important role of surgical mask.
Non woven surgical mask has good elasticity, even if it is stretched from left to right, it will not appear unkempt. It feels very soft and will not become hard even after repeated cleaning. Moreover, the non woven surgical mask is elastic and can return to its original shape after long-term use.
Compared with other textile cloth surgical masks, the strength and durability is poor, and it is not easy to clean, if the usual care is not appropriate, easy to tear the phenomenon. Normally, nonwoven surgical masks are disposable, which can cost a little more than reusable masks.
ASTM specifies testing with a droplet size of 3.0 microns containing Staph. Aureus (average size 0.6-0.8 microns). In order to be called a medical/surgical mask, a minimum 95% filtration rate is required. Moderate and high protection masks must have bacterial filtration rates greater than 98%.
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