Patent ID: 11912908
Assignee: NITTO DENKO CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC C

Claim 0:
1. An air-permeable adhesive sheet having air permeability in a thickness direction thereof, the air-permeable adhesive sheet comprising:
an adhesive agent layer having first through holes extending in the thickness direction, wherein
at least one surface of the adhesive agent layer forms an adhesive surface,
the through holes have an average opening diameter of 1.0 to 50 μm,
the through holes have an average interval of 5 to 400 μm, and
a variation in air permeability in the thickness direction is 22% or less as represented by a coefficient of variation of an air permeability measured according to Method B for air permeability measurement (Gurley method) specified in JIS L 1096: 2010, with an effective measurement area as a predetermined value selected from 0.5 to 2.0 mm2.