Patent ID: 8603053

Claim:
A liquid-permeable primary dressing ( 100 ) in the form of a flexible thermoplastic material section ( 1 . 1 ; 1 . 2 ; 1 . 3 ; 1 . 4 ; 1 . 5 ), comprising: a first surface ( 4 ) of the material section ( 1 . 1 ; 1 . 2 ; 1 . 3 ; 1 . 4 ; 1 . 5 ), a second surface ( 5 ) of the material section ( 1 . 1 ; 1 . 2 ; 1 . 3 ; 1 . 4 ; 1 . 5 ) facing away from the first surface ( 4 ), a plurality of three-dimensional perforations ( 2 ; 2 ″; 21 ) whose walls ( 3 ), starting from the first surface ( 4 ), run out into an edge projection with a free edge ( 8 ) and impart a rough grip to the second surface ( 5 ), characterized in that at least one of the free edges ( 8 ) merges into a section ( 12 ) bent approximately vertically to a perforation axis (A), the first surface is smooth, and each free edge is substantially equidistant from the first surface.