Corrugated criss-crossing packing structure

A cross-corrugated packing structure for installations for transferring material and/or heat between a gas phase and a liquid phase, comprising a first surface, called primary surface, having a plurality of parallel channels, said structure comprising a second surface, called secondary surface, consisting of a plurality of secondary packing elements, each secondary packing element being arranged inside a channel of said primary surface, wherein the secondary elements are formed separately from the first surface, wherein said secondary packing elements have a periodic structure along the channels of the primary surface, said secondary packing elements are made from flat metal strips, said flat metal strips are cut and/or perforated and/or bent alternately leftward and rightward into a Y shape.