Patent ID: 11879081
Assignee: MONDI AG
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A release liner comprising:
a carrier substrate;
a thermoplastic polymer layer applied on one side of the carrier substrate; and
a release layer applied on the thermoplastic polymer layer on the side opposite to the carrier substrate;
wherein the thermoplastic polymer layer and the release layer include a network of ridges which result in elevations of the surface of the release liner on the side of the release layer;
wherein the surface on the side of the release layer has a roughness at least between the ridges, such that it has a plurality of pits,
wherein the average number of pits per an area of 3.4 mm2 of the plan view of the release liner surface is at least 50 as determined with a confocal 3D laser scanning microscope at a magnification of 100, wherein only pits are counted, which extend at least to a level of 10.0 μm above the deepest point of the deepest pit within said area of 3.4 mm2, and with the proviso that pits having a joint cross-sectional area in the plan view of the release liner surface at the level of 10.0 μm above the deepest point of the deepest pit are counted as a single pit, and
wherein the pits are stochastically distributed at least between the ridges on the surface of the release liner.