A filter medium is disclosed having a nonwoven layer, which has bicomponent fibres, and a melt-blown layer, which comprises polyester fibres having an average diameter (d1) of less than 1.8 μm. The thickness of the nonwoven layer is less than 0.4 mm at a contact pressure of 0.1 bar. At least 25% of the polyester fibres of the melt-blown layer have a diameter (d) of less than 1 μm.

A composite media alternative to high pressure drop glass microfiber HEPA media for use in applications where HEPA efficiency with an oily aerosol challenge with low resistance are required. The composite media contains two light filtration layers, one or both of which is charged, and the efficiency of the material can be greatly increased over a single layer containing the same weight of material. The composite media contains a backer layer to provide mechanical support to the filtration layers.

The object of the invention is a functional protective material, especially with the function of protecting against chemical and/or biological poisons and/or noxious materials, such as combat agents, wherein the functional protective material comprises a multilayer construction. The multilayer construction has a two-dimensional backing material, especially a textile backing material and a membrane, which is assigned to the backing material and, in particular, is connected therewith. The membrane is provided with a reactive finish, especially with a component having catalytic activity preferably with respect to chemical and/or biological poisons and/or noxious matter. The adsorption filter material is suitable particularly for use in ABC protection objects (such as ABC protective clothing).

The invention relates to a composite material for use in a face mask. The composite material comprises at least one fabric layer comprising a metallic fiber material; and at least one polymer layer laminated with the at least one fabric layer to form a single composite layer; wherein the at least one polymer layer is of substantially the same shape and size as the at least one fabric layer, such that any air stream passing through the composite layer will be effectively filtered by both the at least one fabric layer and the at least one polymer layer.

Filter media comprising polyethersulfone, related components, and related methods are generally described.

A nanofiber based multi-layer filtration material suitable for use in providing air filtration to a user's respiratory system may be provided. as an air filtration garment and/or other air filterina devices such as a face mask, mask and garments or the like. The laminate includes a one or more fabric layer adjacent to one or more nanofiber layers.

A nonwoven fabric including a first layer made of spunbond fibers and a second layer made of meltblown fibers, wherein the first layer is bonded with the second layer, and wherein the spunbond fibers of the first layer are interspersed with the meltblown fibers of the second layer so that the nonwoven fabric exhibits enhanced breathability and filtration properties. In exemplary embodiments, the nonwoven fabric may be used in personal protective equipment, such as, for example, face masks and respirators.

A face mask has a first woven filter layer comprising a first yarn and a second woven filter layer comprising a second yarn. The second yarn is disposed at a non-right and non-parallel angle relative to the first yarn. The second woven filter layer is stitched to the first woven filter layer. A third woven filter layer with a third yarn can be added with the third yarn at a non-right and non-parallel angle relative to both the first yarn and second yarn.

The invention relates to a filter medium comprising a nonwoven layer, which has bicomponent fibres, and a melt-blown layer, which comprises polyester fibres having an average diameter (d1) of less than 1.8 m. The thickness of the nonwoven layer is less than 0.4 mm at a contact pressure of 0.1 bar. At least 25% of the polyester fibres of the melt-blown layer have a diameter (d) of less than 1 m.

A splash resistant multi-layered structure is provided. The structure includes a specific arrangement of layers of material and a plurality of three-dimensional spacers that helps prevent penetration through the structure by a fluid that contacts an outer surface of the structure due to a state of forced separation that exists between two adjacent layers of the structure due to the presence of the plurality of three-dimensional spacers positioned between the layers. The plurality of three-dimensional spacers can be positioned on one of the adjacent layers of the structure such that a distance at least as large as the maximum height of the plurality of three-dimensional spacers separates the two layers from each other and can be present on a layer of material in a continuous or discontinuous pattern or can be present on a layer of material in a random fashion. The presence of the three-dimensional spacers can reduce the basis weight or eliminate one or more layers of the structure, which, in turn, can reduce thermal resistance, lower the pressure drop across the layers of the structure, and reduce the overall weight of the structure to enhance breathability and comfort.