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US 11,104,826 B2Granted
Release-linered pressure-sensitive adhesive sheet
AssigneeNitto Denko Corporation
InventorsShuuhei Yamamoto, Kiichiro Matsushita
Life of this patent
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Abstract
Provided is a PSA sheet capable of providing greater air release properties. The present invention provides a release-linered PSA sheet comprising a PSA sheet and a release liner covering an adhesive face of the PSA sheet. The PSA sheet has a coating layer that partially forms the adhesive face. The release liner has an arithmetic average roughness of 0.1 μm or greater on the PSA sheet side surface.
Claims18
A release-linered pressure-sensitive adhesive sheet comprising
- a pressure-sensitive adhesive sheet and a release liner covering an adhesive face of the pressure-sensitive adhesive sheet, wherein
- the pressure-sensitive adhesive sheet comprises a pressure-sensitive adhesive layer,
- the pressure-sensitive adhesive sheet has a coating layer partially forming the adhesive face,
- the pressure-sensitive adhesive layer has a thickness TA of 1 μm or greater and the coating layer has a thickness TC, satisfying a TC/TA ratio value of 0.75 or less,
- the release liner has an arithmetic average roughness of 0.1 μm or greater on the pressure-sensitive adhesive sheet side surface,
- the adhesive face has a 180° peel strength of 2 N/20 mm or greater, the peel strength is measured such that the adhesive face is peeled from a surface of a stainless steel plate in the 180° direction at a speed of 300 mm/min,
- the adhesive face has a liner peel strength less than 1 N/50 mm, and
- the release-linered pressure-sensitive adhesive sheet has a surface area ratio of the coating layer to the adhesive layer lower than 50%.
5 more elements
Dependencies are inferred from the claim text.