Filtrationseinheit und verfahren zur herstellung einer filtrationseinheit

Abstract

The invention relates to a filtration unit, in particular a syringe attachment filter or syringe filter holder, for filtering of a fluid, the filtration unit comprising: a first housing part comprising at least one first fluid chamber for a fluid to be filtered; a second housing part comprising at least one second fluid chamber for a filtered fluid; a filter element configured to fluidly connect the first chamber and the second chamber and to filter the fluid to be filtered; wherein the second housing part comprises: a support surface for supporting a fringe area of the filter element; and a rib element protruding from the support surface, at least a distal portion of the rib element consisting of or comprising a material substantially fusible by welding; wherein the first housing part comprises: an abutting surface for substantially abutting with the distal portion of the rib element, the abutting surface at least partly facing the support surface of the second housing part; and a barrier element protruding from the abutting surface towards the support surface and positioned relative to the rib element so as to laterally enclose an inner melt cavity therebetween, wherein the inner melt cavity upon welding is at least partially filled with solidified melt originating from fused material of the distal portion of the rib element, wherein the first housing part and the filter element and, optionally, the second housing part are to be coupled to one another via the solidified melt in the inner melt cavity.