Abstract: A method produces a filter element (1) having a filter mat (5) enclosed by at least one fluid-permeable outer envelope (13). By an energy input method, at least one part of the filter mat (5), which faces toward the outer envelope (13), is connected to the outer envelope in at least one connecting zone (17). A filter element is produced by this method.

Abstract: A filter element (20) includes individual components (2, 4, 8), such as a filter medium (8) as one component and further filter element components (2, 4), of which at least one component (4) is made of a material that is at least partially transparent to laser light and at least one further component (2), in the manner of a barrier layer, is made of a material that is at least partially opaque to laser light to perform a transmission welding method by laser light for connecting associable components to each other. At least some of the components of the filter element that are exposed to the laser light during the transmission welding method are at least partially electrically conductive.

Abstract: A method for producing a filter element (1) having a filter mat (5), which is enclosed by at least one fluid-permeable outer envelope (13), is characterized in that, by means of an energy input method, at least one part of the filter mat (5), which faces toward the outer envelope (13), is connected to the outer envelope in at least one connecting zone (17). The invention also relates to a filter element which is produced in particular according to this method.

Abstract: The invention relates to a filter element (20), comprising individual components (2, 4, 8), such as a filter medium (8) as one component and further filter element components (2, 4), of which at least one component (4) is made of a material that is at least partially transparent to laser light and at least one further component (2), in the manner of a barrier layer, is made of a material that is at least partially opaque to laser light in order to perform a transmission welding method by means of laser light for the purpose of connecting associable filter elements to each other, wherein said method is characterized in that at least some of the components of the filter element that are exposed to the laser light during the transmission welding method are at least partially electrically conductive.

Abstract: 1. A method for the production of a filter element. 2. A method for the production of a filter element (1) comprising the steps: a) Providing a filter medium (3) surrounding an inner filter cavity (7) and comprising a heat-sealable material; b) Providing at least one end cap (9, 13) made of thermoplastic, laser-permeable material, forming a covering of the filter cavity (7) on at least one end; c) Forming a laser-impermeable barrier layer (31) between the end cap (9, 13) and the adjacent end of the filter medium (3) and d) Welding the end cap (9, 13) and filter medium (3) by irradiating laser-permeable material adjacent to the barrier layer (31) with laser energy such that, by heating the region adjacent to the barrier layer (31), a welding volume is provided as a joining element for the welded joint created by laser-transmission welding.