# US 5,348,784 A · Antistatic and conductive carpet tile system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,348,784 A - Document ID: US5348784A - Status: Granted - Kind: A - Application number: 07/908,180 - Filed: 1992-07-02 - Granted: 1994-09-20 - Earliest claimed: 1991-11-04 - Assignees: United Technical Products, Inc. - Inventors: Bruce G. Lampert - Web page: https://patentgrep.com/patent/US5348784A ## CPC - C09J 133/08: Homopolymers or copolymers of acrylic acid esters - D04H 1/42: characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece - H01B 1/20: Conductive material dispersed in non-conductive organic material {(organic macromolecular compounds or compositions C08)} - H01B 1/24: the conductive material comprising carbon-silicon compounds, carbon or silicon - C08L 2666/54: Inorganic substances - H05K 3/321: by conductive adhesives - Y10T 428/23957: Particular shape or structure of pile - Y10T 428/23979: Particular backing structure or composition - Y10T 428/23986: With coating, impregnation, or bond - Y10T 428/23993: Composition of pile or adhesive - Y10T 428/28: Web or sheet containing structurally defined element or component and having an adhesive outermost layer - Y10T 428/2848: Three or more layers - Y10T 428/2852: Adhesive compositions - Y10T 428/2857: including metal or compound thereof or natural rubber - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A modular antistatic and conductive carpet tile system including antistatic and conductive carpet tiles for ESD control and a conductive releasable adhesive for releasably securing the carpet tiles, each tile has a primary backing layer including conductive filaments, a conductive support strata disposed below said primary backing layer, and tufting woven through said primary backing layer and extending at least partially into said conductive support strata forming a carpet pile above said primary backing layer; the adhesive includes a releasable adhesional substance and a multiplicity of conductive fibers suspended therein forming a conductive matrix throughout the volume of said adhesional substance. ## Claims ### Claim 1 A modular antistatic and conductive carpet tile floor covering that comprises in combination: (a) a plurality of antistatic and conductive carpet tiles for ESD control for being releasably adhered on a floor and (b) a conductive releasable adhesive wherein: each carpet tile includes a primary backing layer having conductive filaments, a conductive support strata disposed below said primary backing layer, and tufting woven through said primary backing layer and extending at least partially into said conductive support strata forming a carpet pile above said primary backing layer; and the conductive releasable adhesive includes a pressure sensitive acrylic releasable adhesional substance and means for rendering said substance conductive including a multiplicity of conductive fibers suspended in said adhesional substance forming a conductive matrix throughout the volume of said adhesional substance for releasably securing said each tile to said floor. ### Claim 2 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers are present in an amount from about 0.1 to 10 percent of the adhesive by weight. ### Claim 3 (depends on 1) The antistatic conductive carpet tile floor covering of claim 1 in which said conductive fibers are inert with respect to said adhesional substance not adversely affecting the tackiness or adhesive strength of said adhesional substance. ### Claim 4 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers are acrylic fibers conductively coated with copper sulfide. ### Claim 5 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers are carbon coated nylon conductive fibers. ### Claim 6 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers are carbon coated acrylic conductive fibers. ### Claim 7 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers are carbon coated polypropylene conductive fibers. ### Claim 8 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers have a Denier value of between 0.5 and 25. ### Claim 9 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers have diameter of between 0.0005 to 0.0025 inches. ### Claim 10 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive fibers have a length of between 0.5 to 15 mm. ### Claim 11 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive matrix has a maximum surface electrical resistance of 2.times.10.sup.7 ohms. ### Claim 12 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said primary backing layer is woven polypropylene. ### Claim 13 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive filaments are carbon coated nylon. ### Claim 14 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive support strata comprises at least one layer of vinyl material. ### Claim 15 (depends on 14) The antistatic and conductive carpet tile floor covering of claim 14 in which said vinyl material layer comprises a conductive material. ### Claim 16 (depends on 15) The antistatic and conductive carpet tile floor covering of claim 15 in which said conductive material is a silica based metallic coated powder. ### Claim 17 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said conductive support strata comprises a fiberglass scrim sandwiched between upper and lower vinyl layers. ### Claim 18 (depends on 17) The antistatic and conductive carpet tile floor covering of claim 17 in which at least one of said vinyl layers includes a conductive material. ### Claim 19 (depends on 18) The antistatic and conductive carpet tile floor covering of claim 18 in which said conductive material is a plasticizer. ### Claim 20 (depends on 14) The antistatic and conductive carpet tile floor covering of claim 14 in which said tufting extends into the upper vinyl layer. ### Claim 21 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said tufting includes yarn interwoven with at least one conductive filament. ### Claim 22 (depends on 21) The antistatic and conductive carpet tile floor covering of claim 21 in which said filament is a continuous carbon coated nylon conductive monofilament. ### Claim 23 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said tufting forms a loop-pile carpet. ### Claim 24 (depends on 1) The antistatic and conductive carpet tile floor covering of claim 1 in which said tufting forms a cut pile carpet. ### Claim 25 A modular antistatic and conductive carpet tile floor covering that comprises in combination: (a) a plurality of antistatic and conductive carpet tiles for ESD control for being releasably adhered on a floor and (b) a conductive releasable adhesive wherein: each carpet tile includes a primary backing layer, a conductive support layer disposed below said primary backing layer, a polyurethane precoat layer having carbon particles embedded therein disposed between said primary backing layer and said conducted support layer, and tufting woven through said primary backing layer and extending at least partially into said conductive support layer forming a carpet pile above said primary backing layer; and the conductive releasable adhesive for releasably securing said tiles to existing surfaces which includes a releasable adhesional substance and a multiplicity of conductive fibers suspended therein, said conductive fibers forming a conductive matrix throughout the volume of said adhesional substance. ### Claim 26 (depends on 25) The modular antistatic and conductive carpet tile floor covering of claim 25 in which said primary backing layer is polypropelene mesh material. ### Claim 27 (depends on 25) The modular antistatic and conductive carpet tile floor covering of claim 25 in which said conductive support layer is vinyl material having carbon particles embedded therein. ### Claim 28 (depends on 25) The modular antistatic and conductive carpet tile floor covering of claim 25 in which said precoat layer is latex material having carbon particles embedded therein. ### Claim 29 (depends on 25) The modular antistatic and conductive carpet tile floor covering of claim 25 in which said precoat layer is vinyl material having carbon particles embedded therein. ### Claim 30 A modular antistatic and conductive carpet tile floor covering that comprises in combination: (a) a plurality of antistatic and conductive carpet tiles for ESD control for being releasably adhered on existing surfaces; (b) a conductive releasable adhesive; and (c) conductive material wherein each tile includes a primary backing layer having conductive filaments, a conductive support strata disposed below said primary backing layer and tufting woven through said primary backing layer and extending at least partially into said conductive support strata forming a carpet pile above said primary backing layer; the conductive releasable adhesive includes a releasable adhesional substance and means for rendering said substance conductive for releasably securing said tiles to said existing surfaces; and the conductive material is disposed between said carpet tiles and said conductive releasable adhesive for providing a path to ground for any electrical charges which contact said carpet tiles.