Conductive paper for making electroactive surface in construction

Patent metadata

Field	Value
Publication number	US-11560714-B2
Application number	US-202016783469-A
Country	US
Kind code	B2
Filing date	Feb 6, 2020
Priority date	May 7, 2019
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

A building construction product with an electroconductive surface, the building construction product comprising a core with one or more surfaces covered by an electroconductive paper comprising carbon fibers, the electroconductive paper being attached to the one or more surfaces of the core. Methods and materials for producing the building construction products with an electroconductive surface and products and methods for shielding an area from electromagnetic waves.

First claim

What is claimed is:

1. A building construction product with an electroconductive surface, the building construction product comprising a gypsum core with one or more surfaces covered by an electroconductive paper cover sheet comprising carbon fibers, the electroconductive paper cover sheet being attached to the one or more surfaces of the gypsum core, wherein the electroconductive paper cover sheet is a multi-ply paper comprising a surface ply and the carbon fibers are incorporated in the surface ply, and the carbon fibers are incorporated in the surface ply in an amount from 2% wt to 5% wt of fibers total per the ply, and wherein the remainder of the fibers in the ply are cellulose fibers, and wherein the surface ply is the furthest away from the gypsum core and does not come in contact with the gypsum core.

2. The building construction product of claim 1 , wherein the building construction product is a wallboard, a fiberboard, a ceiling tile, a floor tile, a door, a plank, a frame or a roof tile.

3. The building construction product of claim 1 , wherein the building construction product is a wallboard having two long surfaces, and the electroconductive paper cover sheet comprising carbon fibers is applied over at least one long surface of the wallboard two long surfaces.

4. The building construction product of claim 1 , wherein the carbon fibers are long carbon fibers, short carbon fibers or any mixture thereof.

5. The building construction product of claim 1 , wherein the carbon fibers are incorporated in the surface ply of the electroconductive paper cover sheet in a pattern.

Assignees

• United States Gypsum Co

Inventors

• Sinha Ray Suman
• Immordino Jr Salvatore C
• Joseph Mark
• Rosenstiel Terry
• White William

Classifications

• B32B2262/106

  Carbon fibres, e.g. graphite fibres · CPC title

• B32B2419/00

  Buildings or parts thereof · CPC title

• E04C2/50

  Self-supporting slabs specially adapted for making floors ceilings, or roofs, e.g. able to be loaded (E04C2/52, E04C2/54 take precedence; structures of slab-shaped elements E04B1/02; floor structures E04B5/00; roofs consisting of self-supporting slabs E04B7/20; ceilings E04B9/00; roof coverings E04D; floor coverings E04F15/00) · CPC title

• E04C2/16 Primary

  of fibres, chips, vegetable stems, or the like · CPC title

• C04B2111/00612

  as one or more layers of a layered structure · CPC title