초록 ▼

A face mask (10) is provided for covering the mouth and nose of a wearer (14). The mask (10) prevents the passage of liquid from external to the mask to the face of the wearer (14). The mask (10) has four layers including a special low density polyethylene barrier (26). The barrier (26) prevents the

A face mask (10) is provided for covering the mouth and nose of a wearer (14). The mask (10) prevents the passage of liquid from external to the mask to the face of the wearer (14). The mask (10) has four layers including a special low density polyethylene barrier (26). The barrier (26) prevents the passage of liquid in at least one direction while freely allowing the passage of gases in both directions.

대표청구항 ▼

A gas-pervious layered material impervious to liquid in one direction therethrough, comprising: a first layer means of a gas-pervious material having a plurality of apertures therethrough which are impervious to the passage of liquid in the one direction; a second layer means of a nonwicking materia

A gas-pervious layered material impervious to liquid in one direction therethrough, comprising: a first layer means of a gas-pervious material having a plurality of apertures therethrough which are impervious to the passage of liquid in the one direction; a second layer means of a nonwicking material fixed to said first layer means to prevent penetration of said apertures by wicking particles which would draw the liquid therethrough; and a third layer means of a filter material to prevent the passage of airborne bacteria, said third layer means applied to said material to place the first layer means between said third and second layers means.