EP0427203A1 - Elektrisch leitfähiges Dekormaterial - Google Patents

Elektrisch leitfähiges Dekormaterial Download PDF

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Publication number
EP0427203A1
EP0427203A1 EP90121221A EP90121221A EP0427203A1 EP 0427203 A1 EP0427203 A1 EP 0427203A1 EP 90121221 A EP90121221 A EP 90121221A EP 90121221 A EP90121221 A EP 90121221A EP 0427203 A1 EP0427203 A1 EP 0427203A1
Authority
EP
European Patent Office
Prior art keywords
conductive
electrically conductive
fiber
layer
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90121221A
Other languages
English (en)
French (fr)
Other versions
EP0427203B1 (de
Inventor
Yozi Kawaguchi
Hirofumi Amano
Satoshi Kashihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Linoleum Co Ltd
Original Assignee
Toyo Linoleum Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Linoleum Co Ltd filed Critical Toyo Linoleum Co Ltd
Publication of EP0427203A1 publication Critical patent/EP0427203A1/de
Application granted granted Critical
Publication of EP0427203B1 publication Critical patent/EP0427203B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Definitions

  • the present invention relates to electrically conductive decorative materials, such as conductive decorative sheets or tiles, suitable as floor materials for use in factories handling ICs, LSIs and like electronic parts, laboratories or operating rooms, various clean rooms, etc.
  • JP-B No. 60-­6429 proposes an interior finishing material comprising electrically non-conductive colored pellets and electrically conductive pellets. This material has a decorative effect and exhibits a considerable antistatic effect, whereas the conductive carbon black, giving a dark color to the material in its entirety.
  • this floor material is used in electronic part factories handling ICs, LSIs or the like, the material is subjected for example, to a voltage of at least 300V for 10KV as measured by the Honest Meter method, causing a voltage breakdown of electronic parts.
  • voltage breakdown refers to the phenomenon that electric charge stored in the human body, which can be viewed as a capacitor, flows out into an electronic part to break down the part.
  • the voltage breakdown invariably occurs when the charge voltage is not lower than 100V. To preclude this, the charge voltage is preferably up to 50V, more preferably up to 30V.
  • the known floor material nevertheless has the problem that the charge on the nonconductive pellets is not readily removable but induces a voltage breakdown. Further with the above floor finishing materials wherein conductive carbon black is used, fine particles of carbon black become suspended in the air owing to the wear of the surface to degrade the clean atmosphere of factories handling ELSIs, precision electronic parts or the like, laboratories or clean rooms.
  • An object of the present invention is to provide an electrically conductive decorative material having an excellent conductive properties along with a decorative effect and a light-colored appearance.
  • Another object of the present invention is to provide an electrically conductive decorative material free of the problem of dust and like particles.
  • 1 is an electrically conductive backing which is optionally provided
  • 2 is conductive resin layer containing an electrically conductive fiber
  • 4 is pattern piece containing an antistatic agent
  • 5 is layer of collection of pattern pieces
  • 6 is electrically conductive resin layer which penetrates into and fill the interstices between the pattern pieces
  • 7 is pellet containing an electrically conductive fiber.
  • the electrically conductive decorative material of the present invention is prepared, for example, by coating an electrically conductive backing 1 with a thermoplastic resin 2 in the form of a paste and containing an electrically conductive fiber 3, scattering a predetermined quantity of pattern pieces 4 over the resin coatings, and subjecting the resulting sheet to an increased pressure with heating preferably at 160 to 220°C to thereby cause the thermoplastic resin 2 containing the conductive fiber 3 to penetrate into and fill the interstices between the pattern pieces 4 and form a layer 5 of collection of the pattern pieces 4.
  • Examples of conductive fibers for use in the present invention are carbon fiber, metal fiber, fiber of vacuum-evaporated metal and the like. These conductive fibers are preferably 0.1 to 10mm, more preferably 0.5 to 5 mm, in average length and preferably 5 to 50 ⁇ m, more preferably 10 to 20 ⁇ m, in average diameter.
  • the thermoplastic resin serving as a matrix resin for the conductive fiber is, for example, polyvinyl chloride (PVC) or copolymer thereof, ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), polypropylene (PP), amorphous poly ⁇ -olefin (APAO) or the like.
  • the matrix resin contains the conductive fiber preferably in an amount of 0.5 to 5 wt%.
  • Pellets 7 containing an electrically conductive fiber can be incorporated into the conductive resin layer along with the conductive fiber.
  • pellets can be obtained by incorporating the same conductive fiber as mentioned above into pellets of a resin similar to the matrix resin for the fiber. The presence of pellets gives improved conductivity to the material. Such pellets are used preferably in a quantity of 1 to 10wt% based on the matrix resin.
  • the conductive backing to be used in the invention is preferably a sheet or the like which is prepared, for example, from the same matrix resin as above and electrically conductive carbon black kneaded therewith.
  • the conductive resin containing the conductive fiber is applied to the backing 1 or release paper to a thickness preferably of 0.1 to 2mm, more preferably 0.2 to 0.7mm.
  • the conductive resin layer has formed thereon the layer 5 of collection of pattern pieces 4 prepared from a thermoplastic resin which contains no conductive fiber and is given an antistatic property by an antistatic agent.
  • the thermoplastic resin serving as a matrix resin for the antistatic agent can be the same as the matrix resin for the conductive fiber.
  • the antistatic agent to be used in the invention is, for example, any of various surfactants, which include, for example, anionic, nonionic, cationic and ampholytic surfactants as given below.
  • Alkylamine salts polyoxyethylene alkylamine salts and quaternary ammonium salts.
  • Partial esters of fatty acid with polyvalent alcohols polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene acyl esters, polyethylene glycols and polyoxyethylene alkylamines.
  • Alkylbetaines and imidazoline sulfuric acid esters are Alkylbetaines and imidazoline sulfuric acid esters.
  • surfactants can be used in combination with an electrically conductive plasticizers of the phosphoric acid ester type, such as cresyldiphenyl phosphate, tricresyl phosphate, dioctyl phosphate, triamyl phosphate, 2-butoxyethyl phosphate and 2-chloroethyl phosphate.
  • the antistatic agent is used preferably in an amount of 1 to 5wt% based on the matrix resin.
  • the pattern pieces 4 are 0.5 to 5mm in diameter.
  • the conductive resin layer 1 having pattern pieces 4 arranged thereon is pressed with heating to thereby cause the conductive resin to penetrate into and fill the interstices between the pattern pieces 4, whereby the contemplated conductive decorative material can be formed. Consequently, the conductive fiber 3 is partly present in the penetrating resin portions 6 to give greatly improved conductivity to the material vertically thereof. Moreover, the conductive fiber, which is present in the above-mentioned amount, is difficult to recognize with the unaided eye, so that the material appears to contain no conductive fiber, has nothing which impairs its decorative appearance and can be colored light as desired. Accordingly, it is not likely that the material is solid black or only dark-colored like the conventional conductive floor material, but the present material is available with an optional design.
  • the pieces of conductive fiber which are virtually difficult to recognize with the unaided eye are dispersed as entangled with one another in the thermoplastic resin and electrically connected to the conductive backing. This gives very satisfactory conductivity to the decorative material, facilitating release of charge from the material itself or from the human body in contact with the material. Thus, the decorative material has remarkable conductivity in its entirety.
  • the pieces of conductive fiber are spread in the conductive resin layer as entangled with one another horizontally as shown in FIG. 1 and as entangled also vertically as seen in FIG. 2.
  • the conductive fiber thus entangled three-­dimensionally effective affords electric conductivity.
  • the charge voltage on the human body due to walking on the floor material is up to 50V, preferably up to 30V, whereas the corresponding value in the case of the present decorative material is surprisingly as low as up to 20V.
  • the present material is therefore useful as a floor material for completely eliminating voltage breakdown failures in factories handling ICs, LSIs or the like, ignition due to the discharge of charge on the human body in operating rooms, and malfunctions or like troubles of electronic devices.
  • the conventional conductive floor material With the conventional conductive floor material, a large amount of carbon black or conductive fiber is exposed on the surface and accordingly releases fine carbon or like particles, so that the material is not usable in clean rooms or the like, whereas with the decorative material of the invention, the conductive fiber appears on the surface only to such an extent that it is virtually difficult to recognize with the unaided eye. Thus, the present material releases almost no dust even in clean rooms and is usable favorably.
  • the conductive decorative material of the present invention have the following advantages.
  • a PVC paste of composition A was colored light blue with a toner and applied to a thickness of 0.3mm on a conductive backing having carbon black incorporated therein.
  • Colored antistatic pattern pieces were prepared by adding pigments to portions of a compound of composition B individually, making the paste portions into three kinds of sheets, i.e., dark blue, blue and light blue sheets, and pulverizing the sheets to a mean particle size of 2mm. The pattern pieces were scattered over the resin layer on the backing, and the resulting sheet was heated to 200°C and then pressed to obtain a conductive decorative floor material of the invention.
  • Composition A (Kanevinyl paste P S L-10, product of Kanegafuchi Chemical Industry Co., Ltd.) 100 parts Filler (calcium carbonate) 5 parts Plasticizer (dioctyl phthalate) 40 parts Stabilizer (Ba-Zn type) 2 parts Carbon fiber (3mm in average length and 13 ⁇ m in average diameter) 3 parts
  • Composition B PVC (SS-80, product of Denki Kagaku Kogyo K. K.
  • the following properties of the floor material obtained were measured at 20°C at a relative humidity of 20%.
  • Table 1 shows that the decorative material of the invention had excellent conductive properties. No voltage breakdown of ICs, LSIs or the like, or no malfunction of electronic devices occurred due to the use of the present material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)
  • Laminated Bodies (AREA)
  • Conductive Materials (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP19900121221 1989-11-07 1990-11-06 Elektrisch leitfähiges Dekormaterial Expired - Lifetime EP0427203B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP289052/89 1989-11-07
JP1289052A JPH0658000B2 (ja) 1989-11-07 1989-11-07 導電性装飾材

Publications (2)

Publication Number Publication Date
EP0427203A1 true EP0427203A1 (de) 1991-05-15
EP0427203B1 EP0427203B1 (de) 1997-04-02

Family

ID=17738201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900121221 Expired - Lifetime EP0427203B1 (de) 1989-11-07 1990-11-06 Elektrisch leitfähiges Dekormaterial

Country Status (4)

Country Link
EP (1) EP0427203B1 (de)
JP (1) JPH0658000B2 (de)
CA (1) CA2029190C (de)
DE (1) DE69030351T2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0610490U (ja) * 1992-07-16 1994-02-10 東リ株式会社 帯電防止床タイル
JP5686536B2 (ja) * 2010-06-30 2015-03-18 住江織物株式会社 リサイクルタイルカーペット及びその製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040210A (en) * 1957-01-03 1962-06-19 Congoleum Nairn Inc Decorative surface covering and process therefor
DE1928405A1 (de) * 1968-06-07 1969-12-18 Fujimori Kogyo Company Ltd Leitfaehiger Teppichbodenbelag sowie Verfahren zu dessen Herstellung
GB2064428A (en) * 1979-11-19 1981-06-17 Minnesota Mining & Mfg Electrically conductive laminate
US4540624A (en) * 1984-04-09 1985-09-10 Westinghouse Electric Corp. Antistatic laminates containing long carbon fibers
US4724187A (en) * 1986-03-25 1988-02-09 Nevamar Corporation Conductive laminate flooring

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5998967A (ja) * 1982-11-30 1984-06-07 住友ゴム工業株式会社 導電性床
JPS6367141A (ja) * 1986-09-09 1988-03-25 アキレス株式会社 帯電防止用積層シ−ト
JPH0445881Y2 (de) * 1987-03-25 1992-10-28
JPS63272856A (ja) * 1987-04-30 1988-11-10 三井化学株式会社 導電性レジンモルタル床

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040210A (en) * 1957-01-03 1962-06-19 Congoleum Nairn Inc Decorative surface covering and process therefor
DE1928405A1 (de) * 1968-06-07 1969-12-18 Fujimori Kogyo Company Ltd Leitfaehiger Teppichbodenbelag sowie Verfahren zu dessen Herstellung
GB2064428A (en) * 1979-11-19 1981-06-17 Minnesota Mining & Mfg Electrically conductive laminate
US4540624A (en) * 1984-04-09 1985-09-10 Westinghouse Electric Corp. Antistatic laminates containing long carbon fibers
US4724187A (en) * 1986-03-25 1988-02-09 Nevamar Corporation Conductive laminate flooring

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE DERWENT WORLD PATENT INDEX AN 87182632 "ELECTRICALLY CONDUCTIVE DECORATIVE & JP62113544 (SUMITOMO BAKELITE) 25-05 -87 *
DATABASE DERWENT WORLD PATENT INDEX AN 89134896 "ANTISTATIC THERMOSETTING RESIN..." & JP1080526 (SUMITOMO BAKELITE) 27-03-89 *

Also Published As

Publication number Publication date
DE69030351D1 (de) 1997-05-07
JPH03151460A (ja) 1991-06-27
CA2029190C (en) 2000-01-11
DE69030351T2 (de) 1997-07-17
EP0427203B1 (de) 1997-04-02
CA2029190A1 (en) 1991-05-08
JPH0658000B2 (ja) 1994-08-03

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