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US 2021/0340411 A1Published application
Release liner, method of producing release liner, adhesive sheet, and method of producing adhesive sheet
AssigneeLintec Corporation
InventorsTakuma OKUBO, Kenji OHATA, Akihito YAMADA
Life of this patent
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Abstract
A release liner which makes it difficult for an adhesive layer to impair slidability and makes it easy to exhibit an adhesive force suitably, a method of producing a release liner, an adhesive sheet, and a method of producing an adhesive sheet. A release liner has a surface provided with a ridge portion extending linearly, and on the surface, a plurality of recesses having different depths are randomly formed in a surface direction and are continuously connected.
Claims7
1-6. (canceled)
A release liner comprising:
- a surface provided with a ridge portion extending linearly,
- wherein, on the surface, a plurality of recesses having different depths are randomly formed in a surface direction and are continuously connected.
A method of producing a release liner, comprising:
- a pressing step of pressing a surface of a liner material with a roller,
- wherein the roller presses the liner material on an outer peripheral surface of the roller in which a groove extending linearly is provided and a plurality of protrusions having different heights are randomly formed in a surface direction and are continuously connected.
Dependencies are inferred from the claim text.