Patent ID: 11919190
Assignee: MöLNLYCKE HEALTH CARE AB
Field: Surface technology, coating (Chemistry)
Classification: CPC B  A | IPC B

Claim 0:
1. A process for introducing a plurality of perforations into a laminate, wherein said process comprises at least the following steps:
i. providing a laminate, said laminate comprising at least one substrate layer, said at least one substrate layer being in contact with at least one layer comprising a silicone gel:
said laminate further comprising, in contact with said at least one layer comprising the silicone gel, at least one deformable layer;
ii. providing an ultrasonic welding device comprising an array of perforating elements suitable for introducing perforations into at least said at least one substrate layer and said at least one layer comprising the silicone gel;
iii. bringing said array of perforating elements in contact with said deformable layer of said laminate;
iv. applying ultrasonic energy to said laminate in order to simultaneously introduce a plurality of perforations into at leastsaid at least one substrate layer and said at least one layer comprising the silicone gel, while introducing deformed portions in said deformable layer, wherein said deformed portions essentially correspond to the shape of the perforating elements, further wherein said deformed portions at least partly penetrate into the perforations so created;
v. after having introduced said plurality of perforations into said laminate, keeping said deformable layer in contact with said at least one layer comprising the silicone gel, such that said deformed portions remain penetrating into said plurality of perforations, for at least 12 hours.