Abstract: A filter medium includes at least one filter membrane (10) having a fabric ply (12) as a supporting and protective layer. At least one additional filter membrane (14) with another fabric ply (16) as a supporting and protective layer is also provided. A third fabric ply (18) extends between both adjacent filter membranes (10, 14). Both adjacent filter membranes (10, 14) are connected together by the threads (26) of the other two plies (12, 16) which reach through to the third ply (18).

Abstract: A method for producing tubular membranes creates a very inexpensive production method, while obtaining very high output rates for tubular membranes. A tubular member (10) is formed from several threads (12) in such a way that at least some of the threads (12) are tightly tied together along web-type connecting lines (14) that are composed of longitudinal threads. At least some of the threads (12) form a transversal connection (16) between adjacent longitudinal threads (14) in between the web-type connecting lines (14). A predefined membrane material (18) is applied to the tubular member (10).

Abstract: The invention relates to a filter medium comprising at least one filter membrane (10) comprising a carcass ply (12) as a supporting and protective layer. At least one additional filter membrane (14) comprising another carcass ply (16) as a supporting and protective layer is also provided. A third carcass ply (18) extends between both adjacent filter membranes (10,14), and both adjacent filter membranes (10, 14) are connected together by the threads (26) of the other two carcass plies (12,16) which reach through to the third carcass ply (18).

Abstract: The invention relates to a method for producing tubular membranes. In order to create a very inexpensive production method while obtaining very high output rates for tubular membranes, a tubular member (10) is formed from several threads (12) in such a way that at least some of the threads (12) are tightly tied together along web-type connecting lines (14) that are composed of longitudinal threads while at least some of the threads (12) form a transversal connection (16) between adjacent longitudinal threads (14) in between said web-type connecting lines (14), and a predefined membrane material (18) is applied to the tubular member (10).