anafanya kaziwaya wa pua is to make the mask fit the face better and ensure that bacteria are not easy to enter the respiratory tract. The waya wa pua needs to have a good force-bearing shape, there will be no rebound under the condition of no force, and the existing shape will not be deformed.

Kuna vifaa vitatu vya kawaida vinavyotumika kwa waya wa pua: polyolefin polima iliyofunikwa mabati laini ya chuma, plastiki na alumini safi.

Waya wa pua ya chumani ya maandishi polyolefin polima iliyofunikwa mabati laini ya chuma.

Pua ya plastiki, zote zimetengenezwa na resini ya polyolefini.

Waya ya aluminumnoseni mhuri kutoka aluminumsheet chuma