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Disposable Medical Face Mask

Disposable Medical Face Mask

Disposable Medical Mask Material: NonWoven Fabric+Meltbl

Disposable KN95 Face Mask

Disposable KN95 Face Mask

Disposable N95 Mask Material: 5 ply Non-woven fabric Col

Disposable N95 Face Mask

Disposable N95 Face Mask

Disposable KN95 Face Mask Material: Needle punched cotto

Infrared Forehead Thermometer

Infrared Forehead Thermometer

Infrared Forehead Thermometer Sample: Free Brand: Orient

Disposable Isolation Coveralls

Disposable Isolation Coveralls

General purpose, Cleanroom, Construction/building, Clean

Disposable Medical Gloves

Disposable Medical Gloves

Disposable Medical Gloves Material: PVC Color: Transpare

Disposable Isolation Gowns

Disposable Isolation Gowns

PE Isolation Gown, Disposable PE Isolation Gown, Isolati

How are N95 Masks Made?

A medical N95 respirator consists of multiple layers of nonwoven fabric, often made from polypropylene. The two outward protective layers of fabric, covering the inside and outside of the mask, are created using spunbonding. Spunbonding uses nozzles blowing melted threads of a thermoplastic polymer (often polypropylene) to layer threads between 15-35 micrometers on a conveyor belt, which build up into cloth as the belt continues down the line. Fibers are then bonded using thermal, mechanical, or chemical techniques. The two outer layers of the respirator, between 20 and 50 g/m2 in density, act as protection against the outside environment as well as a barrier to anything in the wearer’s exhalations.
 

Between the spunbond layers there’s a pre-filtration layer, which can be as dense as 250 g/m2, and the filtration layer. The prefiltration layer is usually a needled nonwoven. Nonwoven material is needle punched to increase its cohesiveness, which is accomplished by sending barbed needles repeatedly through the fabric to hook fibers together. The prefiltration layer is then run through a hot calendaring process, in which plastic fibers are thermally bonded by running them through high pressure heated rolls. This makes the pre-filtration layer thicker and stiffer, so it can be molded to form the desired shape and stay in that shape as the mask is used.

KN95 Mask Supplier

The last layer is a high efficiency meltblown electret (or polarized) nonwoven material, which determines the filtration efficiency. Meltblowing is a process similar to spunbonding, in which multiple machine nozzles use air to spray threads of melted synthetic polymers onto a conveyor. However, these fibers are much smaller, as less than a micron wide. As the conveyor continues, the threads build up and bond by themselves as they cool, creating the fabric. However, sometimes meltblown fabric is also thermally bonded to add strength and abrasion resistance, although the material then begins to lose some of its fabric characteristics.
 

The full respirators are made through converting machinery, which combines the layers through ultrasonic welding and adds straps and metal strips to adjust the mask over the user’s nose. The respirators are then sterilized as a last step before being shipped.
 

N95 is the United States standard, it is also called KN95 masks in China, able to filter out 95% of particles as small as 0.3 microns from the air.
 

Please Note: N95 and KN95 has the same filtering features – there is virtually NO difference.

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