It is disclosed an electromagnetic shield (1) and a related method for providing electromagnetic shielding wherein the shield comprises a shielding surface provided with a plurality of electrically conductive elements (2), said plurality of electrically conductive elements (2) being electrically connected to a switching assembly (3) configured to switch said electromagnetic shield (1) between an open configuration, wherein said electrically conductive elements (2) are electrically insulated from one another, and a shorted configuration wherein said electrically conductive elements (2) are electrically connected to each other at a common node (C). When the electrically conductive elements (2) of the electromagnetic shield (1) are switched between the open and shorted configurations, a change of the electromagnetic shielding effectiveness (EMSE) occurs. The electromagnetic shield (1) can be used for providing a shielding textile fabric (12), or an article that may comprise the electromagnetic shield (1) in form of a pocket preferably made with the shielding fabric (12).

The invention relates to a fabric for electromagnetic shielding having a weave of interlaced weft threads (2) and warp threads (3). In addition, the warp threads (3) are conductive and include multi-filament or mono-filament textile conductors associated with metal strands and at least one conductive warp thread (4) is inserted into a weft such as to create equipotential bonding perpendicular to the direction of the warp threads (3).

A metalized fabric and method for metallization of fabric. The fabric is formed using two threads with different affinities for metallization, but which threads are not metalized prior to forming into the fabric. The threads will typically be woven using an unbalanced weave to provide one side of the fabric with a resultant greater amount of metallization than the other but this is not required. Once the resultant fabric is metalized, it will typically be more suitable for consistent color dying than fabric which was formed from both metalized and unmetallized threads.

The invention concerns a radiation protective material, which comprises a fibrous material with composite filaments including a radiopaque substance. The filaments are structured in a regular pattern to form the radiation shielding material.

A yarn made from a mixture of a grain and a first polymer by spinning is provides. The yarn includes a plurality of fibers. Each fiber has a surface layer and a core layer surrounded by the surface layer. The surface layer is made from the grain and the first polymer. The core layer is made from the first polymer. The grain includes a nano-powder mixture and a second polymer. A weight percentage of the nano-powder mixture in the grain is from 60% to 70%. The nano-powder mixture includes silicon dioxide, magnesium oxide and aluminum oxide. A weight ratio of silicon dioxide to magnesium oxide in the nano-powder mixture is from 2:1 to 1:2. A weight ratio of silicon dioxide to aluminum oxide in the nano-powder mixture is from 2:1 to 1:2.

The invention relates to a fabric. The fabric (10) comprises, in the fabric material, threads (11a1, 12a1; 13a1, 14a1) of a material conducting electricity well, by means of which electro-magnetic radiation and magnetic fields are filtered. The threads (11a1, 12a1; 13a1, 14a1) are placed next to each other. Furthermore, the threads are wound around their winding axes (X1, X2; Y1, Y2) so that the first thread (11a1, 13a1) in the fabric is wound clockwise, and the second thread (12a1, 14a1) next to it is wound counterclockwise.

A textile sleeve for protecting elongate members against EMI and method of construction thereof is provided. The sleeve includes a wall having opposite edges extending lengthwise in generally parallel relation with a longitudinal axis between opposite ends. The opposite edges are configured to overlap one another to bound a central cavity extending between the opposite ends. The wall includes warp filaments, extending generally parallel to the longitudinal axis, woven with weft filaments, extending generally transversely to the warp filaments. The warp filaments include substantially electrically non-conductive multifilaments woven in a plain weave pattern with the weft filaments and electrically conductive members woven with the weft filaments to form a plurality of floats, with each of the floats extending over at least two adjacent ones of the weft filaments.

A woven EMI sleeve has a wall with opposite edges extending lengthwise between opposite ends. The wall is wrapped about a central longitudinal axis into a tubular configuration bounding an enclosed cavity sized for receipt of an elongate member therein. The wall is woven with warp filaments extending generally parallel to the central longitudinal axis and weft filaments extending generally transversely to the warp filaments. The warp filaments include conductive filaments provided as wire filaments and separate non-conductive warp filaments. The weft filaments include heat-set filaments that are heat-formed to bias the wall into the tubular configuration and to bias opposite edges into overlapping relation with one another. The weft filaments also include conductive filaments.

The present invention discloses a fused sheet for electromagnetic wave absorption/extinction and shielding, and for electronic equipment high heat dissipation. The fused sheet for electromagnetic wave absorption/extinction and shielding, and for electronic equipment high heat dissipation of the present invention includes a premolded graphite sheet prepared by molding a graphite substrate into a sheet form having a density in a range of 0.1-1.5 g/cm.sup.3 and an incomplete state of crystal structure; and a porous metal sheet having a plurality of pores connected to upper and lower surfaces of the porous metal sheet, wherein the premolded graphite sheet is stacked on one surface of the porous metal sheet, and press molded to be integrally attached and combined, so as to have a density of 1.6 g/cm.sup.3-6.0 g/cm.sup.3

A textile fabric, sleeve formed therefrom, and methods of construction thereof are provided. The fabric forms an elongate wall constructed from lengthwise extending warp yarns woven with widthwise extending weft yarns. At least some of the warp yarns are electrically conductive and have a first diameter. The weft yarns have a second diameter that is at least 25 percent less than the first diameter of the warp yarns. As such, the conductive warp yarns are brought into closer proximity with one another than if the weft yarns were the same diameter as the warp yarns. Accordingly, the ability of the fabric and sleeve formed therewith to provide shielding protection against EMI is enhanced.