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:
Mar. 31, 2020
Filed:
Mar. 09, 2018
Jx Nippon Mining & Metals Corporation, Tokyo, JP;
Koichiro Tanaka, Ibaraki, JP;
JX Nippon Mining & Metals Corporation, Tokyo, JP;
Abstract
Provided is an electromagnetic wave shielding material including a multilayer structure in which at least one metal foil and at least two resin layers are closely laminated, wherein both surfaces of each metal foil are closely laminated to the resin layers; wherein each metal foil satisfies the following relationship with each of the two resin layers adjacent to the metal foil: 0.02≤V/V≤1.2, in which: Vis a volume fraction of the metal foil relative to a total volume of the metal foil and the resin layer; Vis (σ−σ)/(σ+σ−σ); σis a true stress (MPa) of the metal foil at breakage when a tensile stress is applied to the metal foil; σis a true stress (MPa) of the resin layer at breakage when a tensile stress is applied to the resin layer; and σis a true stress (MPa) of the resin layer when a logarithmic strain same as a logarithmic strain at breakage of the metal foil is applied to the resin layer.