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

Claim 17:
18. A process for producing the release liner according to claim 1, the process comprising the steps of:
(a) providing a roll;
(b) forming a network of channels into a surface of the roll and roughening the surface of the roll to produce a plurality of peaks in the surface, wherein the roughening is performed either before or after the formation of the network of channels, such that the surface of the roll resulting from step (b) is roughened at least between the channels and contains the plurality of peaks in the surface;
(c) providing a composite comprising:
the carrier substrate,
the thermoplastic polymer layer applied on one side of the carrier substrate, and
the release layer applied on the thermoplastic polymer layer on the side opposite to the carrier substrate; and
(d) embossing the thermoplastic polymer layer and the release layer with the roll obtained in step (b) to form the network of ridges which result in the elevations of the surface of the release liner on the side of the release layer and to roughen said surface of the release liner at least between the ridges resulting in the plurality of pits as defined in claim 1.