US 12,303,358 B2
Double coating for wound dressings
Ulf Johannison, Landvetter (SE); Bengt Söderström, Mölnlycke (SE); AnnBritt Gergely, Mölndal (SE); and Kristina Halldin, Svenshögen (SE)
Assigned to Mölnlycke Health Care AB, Mölndal (SE)
Appl. No. 17/783,396
Filed by Mölnlycke Health Care AB, Gothenburg (SE)
PCT Filed Dec. 16, 2020, PCT No. PCT/EP2020/086387
§ 371(c)(1), (2) Date Jun. 8, 2022,
PCT Pub. No. WO2021/122720, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19218022 (EP), filed on Dec. 19, 2019.
Prior Publication US 2023/0009183 A1, Jan. 12, 2023
Int. Cl. A61F 13/00 (2024.01); A61F 13/02 (2006.01); A61F 13/0203 (2024.01); A61F 13/0206 (2024.01)
CPC A61F 13/022 (2013.01) [A61F 13/0209 (2013.01); A61F 13/0289 (2013.01); A61F 2013/00702 (2013.01); A61F 2013/0074 (2013.01); A61F 2013/00863 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A medical dressing comprising
a porous layer having a first side and a second side, wherein said first side and said second side are opposite to each other and extend in the horizontal direction of said porous layer;
a first coating extending along at least a portion of the surface area of said first side of said porous layer, wherein said first coating has a first surface facing away from said first side of said porous layer;
a second coating extending along said first side of said porous layer, said second coating comprising a pattern of through openings, wherein said second coating has a first surface facing away from said first side of said porous layer;
wherein said first coating extends along at least those portions of the surface area of said first side of said porous layer that coincide with the through openings of said second coating; and
wherein said first surface of said second coating extends in a plane (B) that is farther away, in the vertical direction, from the first side of said porous layer, than a corresponding plane (A) defined by the first surface of said first coating; wherein said porous layer comprises a pattern of depressions, wherein said pattern of depressions is present on both said first side and said second side of said porous layer, wherein said pattern of depressions on the first side is coaxial to the pattern of depressions on the second side, and wherein the two patterns of depression are separated from each other by a common portion of the porous layer, which common portion is compressed to a larger extent than the remaining parts of said porous layer; and wherein said pattern of depressions in the porous layer substantially coincides with said pattern of through openings in said second coating.