초록 ▼

A multi-layer protective breathing mask adapted to cover the mouth and the nose of a wearer thereof comprises an outer layer, an inner layer and, between the outer and inner layers, a filter element comprising a particle filter and an adsorber filter. The adsorber filter may comprise one or more lay

A multi-layer protective breathing mask adapted to cover the mouth and the nose of a wearer thereof comprises an outer layer, an inner layer and, between the outer and inner layers, a filter element comprising a particle filter and an adsorber filter. The adsorber filter may comprise one or more layers of foam material and the layers of foam material may be of different porosities. The at least one layer of foam material adsorber particles which may preferably be of a plurality of particle sizes.

대표청구항 ▼

A multi-layer protective breathing mask for covering the mouth and the nose of a wearer comprising an outer layer, an inner layer and a filter element between the outer and inner layers, the filter element comprising a particle filter which comprises a layer of electret material, and an adsorber fil

A multi-layer protective breathing mask for covering the mouth and the nose of a wearer comprising an outer layer, an inner layer and a filter element between the outer and inner layers, the filter element comprising a particle filter which comprises a layer of electret material, and an adsorber filter which comprises at least one layer of open-pore foam material provided with at least two different particle sizes of adsorber material, said particle filter being arranged at the outward side of said filter element and said adsorber filter being arranged at the inward side of said filter element.