Method of making a respirator that has a fluorinated electret
Assignee3M Innovative Properties Company
InventorsMarvin E. Jones, Christopher S. Lyons, David B. Redmond, Jeffrey L. Solomon, Seyed Abolhassan Angadjivand
Life of this patent
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Abstract
A method of making a respirator, which method includes placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer. The electret is disposed in the respirator body such that air passes through it before being inhaled by a respirator wearer. The electret includes a nonwoven web that has fluorinated polymeric microfibers and that has at least about 25% atomic fluorine as detected by ESCA and a CF3:CF2 ratio of at least about 0.45.
Claims21
A method of making a respirator, which method comprises:
- placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer, the electret being disposed in the respirator body such that when in use air passes therethrough before being inhaled by a wearer of the respirator, the electret comprising a nonwoven web that includes polymeric microfibers and that has at least about 25% atomic fluorine as detected by ESCA and has a CF3:CF2 ratio of at least about 0.45 as determined according to the Method of Determining CF3:CF2.
A method of making a respirator, which method comprises:
- placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer, the electret being disposed in the respirator body such that when in use air passes therethrough before being inhaled by a wearer of the respirator, the electret comprising a nonwoven web that includes polymeric microfibers and that has at least about 45% atomic fluorine as detected by ESCA and has a CF3:CF2 ratio of at least about 0.25 as determined according to the Method of Determining CF3:CF2.
A method of making a respirator, which method comprises:
- positioning an electret as a prefilter in a respirator, the electret comprising a nonwoven web that includes polymeric microfibers and that has at least about 45% atomic fluorine as detected by ESCA and has a CF3:CF2 ratio of at least about 0.45 as determined according to the Method of Determining CF3:CF2.
A method of making a respirator, which method comprises:
- disposing an electret in a canister suitable for use in a respirator;
- and
- attaching the canister to a respirator body, wherein
- the electret comprises a nonwoven web that includes polymeric microfibers and that has at least about 45% atomic fluorine as detected by ESCA and has a CF3:CF2 ratio of at least about 0.45 as determined according to the Method of Determining CF3:CF2.
A method of making a respirator, which method comprises:
- disposing an electret in a replaceable cartridge of a respirator;
- and
- attaching the replaceable cartridge to a respirator body,
- the electret comprising a nonwoven web that includes polymeric microfibers, the nonwoven web having at least about 45% atomic fluorine as detected by ESCA and a CF3:CF2 ratio of at least about 0.45 as determined according to the Method of Determining CF3:CF2.
Dependencies are inferred from the claim text.