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:
Nov. 25, 2025
Filed:
Jun. 10, 2022
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
A functional filmaccording to an embodiment includes: a substrate () containing an acetyl cellulose resin; a primer layer () containing a filler () and disposed on the substrate (); and a functional layer () containing the filler () and disposed on the primer layer (). The substrate () has a permeation layer () formed by permeation of the resin contained in the primer layer () into part of the substrate (). The permeation layer () has a thickness of 0.1 μm or more and 3.5 μm or less. The primer layer () has a thickness of 0.1 μm or more and 1.0 μm or less. The filler () is silica particles having an average particle size of 20 nm or more and 80 nm or less. The filler () in the primer layer () has a density of ⅓ or more and ¾ or less of the density of the filler () in the functional layer (). The primer layer () and the functional layer () each contain a resin. The resin component of the primer layer () is the same as the resin component of the functional layer