Respirators, also commonly known as N95 respirator masks, consist of multiple layers of non-woven fabric, often made from polypropylene or polyester. The two outward protective layers of fabric, covering the inside and outside of the mask, are created using spun bonding.
They act as a protection against the outside environment as well as a barrier to anything in the wearer’s exhalations. Between the two spun bond layers there’s a pre-filtration layer and the filtration layer. The pre-filtration layer is usually a needled non-woven. The last layer is a high efficiency melt-blown non-woven material, which determines the filtration efficiency.
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