A FILTER BAG

摘要

The filter bag (50) has a substantially elongated shape and extends in a general longitudinal direction and comprises a tube part (51) of filter material formed by a substantially rectangular width of material. The tube part may be made of Teflon ® (PTFE) and is formed by rolling a width of material to form an elongated shape and two opposed edge portions (51b, 51c) of said width of material are connected to each other in a longitudinally extending glue joint (55). The predefined area may have been subjected to a pre-treatment, such as a plasma- polymerisation process or a pressurized carbon dioxide process, in order to secure a sufficient adhesion between the overlapping edge portions (51b, 51c). In case the filter bag furthermore comprises a top part (52) and a bottom part, for instance made of stainless steel, the tube part (51) may be connected to the top part (52) and the bottom part by means of gluing.