Abstract: A support structure (16) for a filter element includes at least one surface part (10), in which one or more fluid passage openings (12a-12e) with predetermined opening cross-sections are formed. The opening cross-section of at least one fluid passage opening (12a-12e) is at least partially elliptical-shaped.

Abstract: A filter material, in particular for hydraulic filters, comprises at least one filter layer (18, 20, 22, 24), each individual filter fold (12) thereof being composed of a pair of filter bid halves (13), consists of a first structure (32) having warp threads (34) and weft threads (36), and of at least one further second structure (20, 22) with a predeterminable filtering characteristic, and is characterized in that the structures are designed such and are operatively connected to one another such that at least one channel guide (40) is formed in the filter layer (15, 20, 22, 24) in particular as a result of the arrangement and geometry of the warp threads (34) and well threads (36) of the first structure (32), said channel guide allowing an undisturbed flow through the respective filter fold half (13) over substantially the entire fold height.

Abstract: A support structure (16) for a filter element, comprising at least one surface part (10), in which one or more fluid passage openings (12a-12e) with predetermined opening cross-sections are formed, is characterized in that the opening cross-section of at least one fluid passage opening (12a-12e) is at least partially elliptical-shaped.

Abstract: 1. Filter material (1) and filter clement (29) with filter material (1). 2. The invention relates to a filter material (1), in particular for hydraulic filters, such as oil filters, consisting of at least one individual layer (5) of a composite of glass fibres (7) with carbon fibres (9). The invention timber relates to a filter element with a corresponding filter material (1).