Composite with improved mechanical properties and molded article including the same
US-10626252-B2 · Apr 21, 2020 · US
Electromagnetic shielding laminated sheet
US12520463B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12520463-B2 |
| Application number | US-202217982948-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 8, 2022 |
| Priority date | May 11, 2020 |
| Publication date | Jan 6, 2026 |
| Grant date | Jan 6, 2026 |
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- Title
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Abstract
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An electromagnetic shielding laminated sheet includes: an electromagnetic wave absorbing layer which includes a matrix and carbon nanotubes dispersed in the matrix and which has a bulk density equal to or less than 997 kg/m 3 ; and a metal layer laid on top of the electromagnetic wave absorbing layer.
First claim
Opening claim text (preview).
The invention claimed is: 1 . An electromagnetic shielding laminated sheet comprising: an electromagnetic wave absorbing layer including a matrix and carbon nanotubes dispersed in the matrix, the electromagnetic wave absorbing layer having a bulk density equal to or less than 100 kg/m 3 ; and a metal layer laid on top of the electromagnetic wave absorbing layer, wherein a proportion of the carbon nanotubes to the electromagnetic wave absorbing layer is equal to or greater than 5% by mass and equal to or less than 60% by mass, wherein the matrix contains a water-soluble polymer and a cured product of a thermosetting resin, wherein the electromagnetic absorbing layer is a freeze-dried product formed by freeze-drying a water dispersion containing the carbon nanotubes and the water-soluble polymer, and wherein the thermosetting resin is contained by the water dispersion or is impregnated into the freeze-dried product. 2 . The electromagnetic shielding laminated sheet of claim 1 , further comprising an insulating layer interposed between the electromagnetic wave absorbing layer and the metal layer. 3 . The electromagnetic shielding laminated sheet of claim 2 , wherein a relative dielectric constant of the insulating layer is lower than a relative dielectric constant of the electromagnetic wave absorbing layer. 4 . The electromagnetic shielding laminated sheet of claim 3 , wherein the electromagnetic wave absorbing layer is porous. 5 . The electromagnetic shielding laminated sheet of claim 2 , wherein the electromagnetic wave absorbing layer is porous. 6 . The electromagnetic shielding laminated sheet of claim 1 , wherein the electromagnetic wave absorbing layer is porous. 7 . The electromagnetic shielding laminated sheet of claim 1 , wherein a proportion of the thermosetting resin to the electromagnetic wave absorbing layer is equal to or greater than 5% by mass and equal to or less than 90% by mass. 8 . The electromagnetic shielding laminated sheet of claim 1 , wherein the electromagnetic wave absorbing layer comprises cellulose nanofibers. 9 . The electromagnetic shielding laminated sheet of claim 1 , wherein the electromagnetic wave absorbing layer having the bulk density equal to or less than 40 kg/m 3 .
Assignees
Inventors
Classifications
Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title
Esters of organic acids {, i.e. acylates} · CPC title
Carbon nanotubes · CPC title
comprising epoxy resins · CPC title
Density · CPC title
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Frequently asked questions
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- What does patent US12520463B2 cover?
- An electromagnetic shielding laminated sheet includes: an electromagnetic wave absorbing layer which includes a matrix and carbon nanotubes dispersed in the matrix and which has a bulk density equal to or less than 997 kg/m 3 ; and a metal layer laid on top of the electromagnetic wave absorbing layer.
- Who is the assignee on this patent?
- Panasonic Holdings Corp, National Univ Corporation Tokai National Higher Education And Research System, Zeon Corp, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H05K9/009. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 06 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).