# US 11,027,518 B2 · Electrically conductive multi-layer material

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- Number: US 11,027,518 B2
- Document ID: US11027518B2
- Status: Granted
- Kind: B2
- Application number: 16/071,488
- Filed: 2016-01-27
- Published: 2019-01-24
- Granted: 2021-06-08
- Earliest claimed: 2016-01-27
- Applicants: Kristaps Draudins; Armands Liede; Karlis Senhofs; Eriks Stankevics
- Inventors: Kristaps Draudins; Armands Liede
- Web page: https://patentgrep.com/patent/US11027518B2

## CPC

- B32B 5/024: {Woven fabric}
- B32B 3/08: characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)}
- B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)}
- B32B 5/22: characterised by the presence of two or more layers which {are next to each other and are fibrous, filamentary, formed of particles or foamed (layer formed of natural mineral fibres or particles next to a foam layer B32B19/047, next to a layer made of particles B32B19/048, or next to a fibrous or filamentary layer B32B19/06; paper layer or cardboard layer next to a paper layer or cardboard layer B32B29/005, next to a foam layer B32B29/007, next to a fibrous or filamentary layer B32B29/02, or next to a particulate layer B32B29/04)}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/00: Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B 17/02: in the form of fibres or filaments
- B32B 17/04: bonded with or embedded in a plastic substance
- C03C 25/14: Spraying
- C03C 25/46: Metals
- C03C 25/47: containing particles, fibres or flakes, e.g. in a continuous phase
- D06M 11/84: combined with mechanical treatment (combined with mechanical tension, e.g. mercerising D06M11/40)
- B32B 2250/05: 5 or more layers
- B32B 2255/02: on fibrous or filamentary layer
- B32B 2255/205: Metallic coating
- B32B 2255/28: Multiple coating on one surface
- B32B 2260/021: Fibrous or filamentary layer
- B32B 2260/025: Particulate layer
- B32B 2260/046: Synthetic resin
- B32B 2262/101: Glass fibres
- B32B 2264/108: Carbon, e.g. graphite particles
- B32B 2307/202: Conductive
- B32B 2307/3065: Flame resistant or retardant, fire resistant or retardant
- B32B 2307/7246: Water vapor barrier
- B32B 2307/7265: Non-permeable
- B32B 2307/752: Corrosion inhibitor
- B32B 2419/00: Buildings or parts thereof
- B32B 2419/06: Roofs, roof membranes
- B32B 2607/00: Walls, panels
- Y02W 30/30: Landfill technologies aiming to mitigate methane emissions
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

The invention relates to conductive multi-layer materials for leak detection applications. The electrically conductive multi-layer material comprises a woven glass fibre web (2) having a binding agent (4) and a fire retardant compound (5), which is impregnated with electrically conductive carbon particles (6), wherein one side of the glass fibre web (2) is coated with metallic electrically conductive layer (10) by the means of vacuum deposition.

## Claims

### Claim 1

Electrically conductive multi-layer material (1) for applying it under a non-conductive water insulation layer, comprising a woven glass fibre web (2) which comprises a binding agent (4) which is a polyvinyl acetate (PVA) and a fire retardant compound (5) which is an organozinc compound, and is impregnated with electrically conductive carbon particles (6), wherein one side of the glass fibre web (2) is coated with a metallic electrically conductive layer (10) by the means of vacuum deposition.

### Claim 2 (depends on 1)

The electrically conductive multi-layer material (1) according to claim 1, wherein the metallic electrically conductive layer (10) is a metal layer selected from the group of metals containing aluminium, copper, aluminium-copper alloy, silver, gold, tin, chromium, iron, molybdenum, niobium, nickel, nickel-chromium alloy, palladium, platinum, silicon, tantalum, titanium and stainless steel.

### Claim 3 (depends on 1)

The electrically conductive multi-layer material (1) according to claim 1, wherein the electrically conductive carbon particles (6) are selected from the group of electrically conductive carbons containing carbon black, graphite and carbon nanotubes.

### Claim 4 (depends on 1)

The electrically conductive multi-layer material (1) according to claim 1, wherein the metallic electrically conductive layer (10) is coated from both sides with a corrosive resistant layer (11) selected from the group of nickel and zinc layer (11).

### Claim 5 (depends on 1)

The electrically conductive multi-layer material (1) according to claim 1, wherein said multi-layer material (1) comprises the woven glass fibre web (2) which comprises the polyvinyl acetate (PVA) and the organozinc compound (5), and is impregnated with the electrically conductive carbon particles (6), wherein said one side of the glass fibre web (2) is coated with the metallic electrically conductive layer (10) by the means of thermal evaporation, and wherein said metallic electrically conductive layer (10) is coated from both sides with a corrosive resistant layer (11).

### Claim 6 (depends on 1)

The electrically conductive multi-layer material (1) according to claim 1, wherein the glass fibre web (2) is coated with the metallic electrically conductive layer (10) by the means of thermal evaporation or sputtering.

### Claim 7 (depends on 1)

Method for manufacture of an electrically conductive multi-layer material (1) according to claim 1, wherein the method comprises the following steps:
a) providing a woven glass fibre web (2) which comprises a binding agent (4) and a fire retardant agent (5);
b) impregnating the woven glass fibre web (2) with electrically conductive carbon particles (6);
c) coating of impregnated woven glass fibre web (2) with metallic electrically conductive layer (10) by means of vacuum deposition.

### Claim 8 (depends on 7)

The Method according to claim 7, wherein before the step c) the impregnated woven glass fibre web (2) is coated with a nickel layer (11) by means of vacuum deposition and after the step c) the coated woven glass fibre web (2) is again coated with a nickel layer (11) by means of vacuum deposition.

### Claim 9 (depends on 8)

The Method according to claim 8, wherein as the vacuum deposition is thermal evaporation or sputtering.