PTFE Face Mask 99%

DHA Filter has been a trusted name in industrial filtration for more than 3 decades.

Like so many companies, the Coronavirus pandemic has had a dramatic impact on how we do business. As a filtration media producer, DHA began receiving inquiries as early as January by face mask manufacturers looking to procure meltblown polypropylene.

Up to this point, this has been the preferred material for PTFE face mask construction. As the volume of requests rapidly increased, it became clear that the supply of this material was going to fall well short of global demand.

DHA began the search for alternative materials that might yield similar if not superior filtration properties. Immediately it struck us that our proprietary HEPA grade, low resistance PTFE face mask membrane that we developed for gas turbine inlet filters would be a viable option.

We reworked the membrane with approved base support materials to quickly enter the PPE arena. The underlying technology is an PTFE face mask membrane that acts as the mask’s efficiency layer.

It is encompassed by a layer of spunbond polypropylene on either side to complete the composite used to make the masks.In lab testing the material proved to be 99% efficient at filtering particles 0.1 micron and larger.

This exceeds the standard for materials used in typical PTFE face mask. The material is also 100% hydrophobic which aids in creating an impenetrable barrier against droplets and spray.

  • 100% Hydrophobic, preventing transfer of fluids
  • Filters 99% of particulate matter
  • Breathable, lightweight PTFE membrane for comfort
  • Spunbond support layer resists tearing and shredding
  • Sonically welded construction for durability
  • Flexible metal nose piece ensures secure fit
  • Low air resistance allows for uninhibited breathing
  • Suitable for all day wear
  • Data Sheet Click Here

Frequently Asked Questions

Is your mask FDA approved?

At this time, our mask has not been evaluated by the FDA. In March of 2020, the FDA issued new emergency guidance on the recommend use and classifications of face masks. The mask that we produce meets FDA criteria for general use. Being that our mask is highly efficient and effective at protection against liquid penetration, we are pursuing an FDA Emergency Use Authorization for use as a Class 3 medical mask.

For additional information regarding the FDA’s current recommendations, please visit

Is your mask N95 rated?

The N95 rating denotes a certification by the National Institute for Occupational Safety and Health (NIOSH). Our mask is a new product and thus has not been submitted to NIOSH for certification.

How are your masks constructed?

Our masks are constructed of top quality materials and feature an ePTFE efficiency layer.  This ePTFE membrane is a highly engineered material that has long been used in premium industrial filtration products.

It is encompassed by a layer of spunbond polypropylene on either side to complete the composite used to make the finished masks. The layers of media are sonically bonded together and include comfortable elastic straps with an aluminum nose strip.

How are your masks tested?

Our mask recently went through a challenging respirator media test following NIOSH procedures TEB-APR-STP 0051-0059 and CFR 42 Part 84 Subpart K-Non-Powered Air Purifying Parculate Respirators.

Our results show that our mask is highly effecve in filtering out very fine parcles rated to 99.5% efficient at 0.1 micron!  Click Here

How are the masks packaged?

There are 40 masks in each sterile heat-sealed plastic enclosure and 60 sealed packages per box.  We are currently requiring orders be made in case quantities of 2,400 masks.

Is there a minimum quantity?

In order to minimize the amount of handling associated with filling individual orders, we are only selling in case quantities. Cases will arrive unopened to the customer.

Can your mask be cleaned and reused?

The FDA has released specific guidelines regarding cleaning procedures for masks that would normally be designated for single use.  For more information please visit the FDA site.

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