Abstract: Described is a pressure sensitive adhesive tape having a backing with a first side and a second side and an adhesive or segments of adhesive on the first side where the adhesive at the edges is thicker than the mid-cross section. Such tapes are especially useful on rough surfaces. Also described is an adhesive tape with an inner adhesive coated on the first side, a plurality of second segments uncoated by adhesive, where the first segments are separated by the second segments, and a third segment of an edge adhesive coated on the edges of the first side of the tacking providing a thicker edge adhesive.

Abstract: Channel flow filtration media possessing high efficiency and low pressure drop is formed from a plurality of filtration layers at least some of which include a multi-dimensional channel pattern having a plurality of continuous, tortuous channels and a multi-dimensional edge at each end of the plurality of channels formed therein. The filtration medium is configured as a stack with the multi-dimensional edge of the channel pattern forming a plurality of inlets open through a first face of the stack, a plurality of outlets open through a second face of the stack, and a corresponding plurality of disruptive fluid pathways passing from the inlets through the stack to the outlets. The filtration layers may be formed from a non-woven material, such as a carbon loaded multi-layer BMF web capable of adsorption of undesired vapors and odors from a fluid.