Filters used in surgical masks and respirators are considered “fibrous” in nature - constructed from flat, non-woven mats of fine fibers
Fiber diameter, porosity (the ratio of open space to fibers) and filter thickness all play a role in how well a filter collects particles (ie., type of material, 1 ply vs 3 ply)
There are 4 mechanisms by which filters work, 3 mechanical (primarily large particles) and 1 Electrostatic (large and small)
N95 respirators are usually manufactured with a melt blown thermoplastic layer
sandwiched between multiple fibrous layers
(Source: CDC, others)
Sample specs from a Disposable Face Mask (can vary)
Inner Layer : Spun-bound polypropylene
Middle Layer: Melt-blown polypropylene
Outer Layer : Spun-bound polypropylene
Sample specs from a KN95 mask manufacturer (can vary)
Non-woven Polypropylene Isolation Layer
Melt blown Thermoplastic Layer (Electrostatic charged, usually PP)
Two-ply Heat Sealed Cotton
Cotton Comfort Layer
Enquire now
Give us a call or fill in the form below and we will contact you. We endeavor to answer all inquiries within 24 hours on business days.
NOT READY TO ORDER? Please fill out the form and let us know what you're interested in. If we have free samples in stock, we'd be happy to send you one!