The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2024
Filed:
Dec. 23, 2019
Nitto Denko Corporation, Osaka, JP;
NITTO DENKO CORPORATION, Osaka, JP;
Abstract
An air-permeable adhesive sheet has air permeability in a thickness direction thereof and including 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 and 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 mm. The air-permeable adhesive sheet is a sheet capable of obtaining good characteristics such as air permeability even when being made into a sheet having a small area.