CA2029190C - Electrically conductive decorative material - Google Patents
Electrically conductive decorative material Download PDFInfo
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- CA2029190C CA2029190C CA 2029190 CA2029190A CA2029190C CA 2029190 C CA2029190 C CA 2029190C CA 2029190 CA2029190 CA 2029190 CA 2029190 A CA2029190 A CA 2029190A CA 2029190 C CA2029190 C CA 2029190C
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- Prior art keywords
- electrically conductive
- resin layer
- conductive
- resin
- pattern pieces
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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
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- 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)
Abstract
Abstract of the disclosure :
The present invention provides an electrically conductive decorative material characterized in that the material comprises:
(a) a layer of an electrically conductive resin containing an electrically conductive fiber, and (b)) a layer of collection of pattern pieces formed over the resin layer and containing an antistatic agent, (c) the fiber - containing conductive resin penetrating into and filling the interstices between the pattern pieces.
The present invention provides an electrically conductive decorative material characterized in that the material comprises:
(a) a layer of an electrically conductive resin containing an electrically conductive fiber, and (b)) a layer of collection of pattern pieces formed over the resin layer and containing an antistatic agent, (c) the fiber - containing conductive resin penetrating into and filling the interstices between the pattern pieces.
Description
Electrically conductive decorative material The present invention relates to electrically conductive decorative materials, such as conductive deco-rative 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.
In order to avoid electrostatic troubles, plastics or rubber floor materials filled with a large quantity of electrically conductive carbon black have heretofore been used in factories handling ICs, LSIs and like electronic parts, laboratories, operating rooms, etc. However, these floor materials, although producing an antistatic effect, have a black surface and are therefore low in decorative effect as interior finishing materials. To overcome this problem, JP-B No. 60-6429 published February 18, 1985, 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 pellets used are black pellets incorporating conductive carbon black, giving a dark color to the material in its entirety. Further when 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 _2_ least 300 V for 10 K V as measured by the Honest Meter method, causing a voltage breakdown of electronic parts.
T he term, "voltage breakdown" refers to the phenomenon t(tat a I ectr i c charge stored i n the human body, wIt i ch can he viewed as a capacitor, flows out into an electronic part to break down the part. T he voltage breakdown invariably occurs when the charge voltage is not lower than 100 V . T o 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 E L S I s, precision electronic parts or the like, laboratories or clean rooms.
A n object of the present invention is to provide an electrically conductive decorative material having an excellent conductive properties along with a decorative effect acrd 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, T he present invention provides an electrically conductive decorative rnaterial characterized in that the material comprises:
(a) a layer of an electrically conductive resin containing an electrically conductive fiber, and (b) a layer of collection of pattern pieces formed over the resin layer and containing an antistatic agent, (c) the fiber - containing conductive resin penetrating into and filling the interstices between the pattern pieces, T he present invention will be described below w i th ref erence to the accornpany i ng draw i ngs, i n wh i ch:
F I G . 1 is a sectional view showing a decorative material of the invention;
F I G . 2 is a fragmentary enlarged view of the surface layer of the material;
F I G. 3 is a fragmentary enlarged view of a surface layer having arranged therein pellets containing an electrically conductive fiber; and F I G . 4 is a rear view of the decorative material of the invention.
I n the drawings, 1 is an electrical ly _ conductive backing which is optionally provided, 2 is conductive resin layer containing an electrically conductive fiber 3 , 4 is pattern piece containing an antistatic agent, 5 is layer of collection of pattern pieces 4 , 6 is electrically conductive resin layer which penetrates into and f i l l the interstices between the pattern pieces 4 , and '~ is pellet containing an electrically conductive fiber.
T he electrically conductive decorative material of the present invention is prepared, for example, by coating an electrically conductive Lacking 1 with a thermoplastic resin 2 in the forrn of a paste and containing an electrically conductive filer 3 , scattering a predetermined quantity of pattern pieces 4 over the resin coating, and subjecting the resulting sheet to an increased pressure with heating preferably at 1G0 to 220 C to thereby cause the thermoplastic resin 2 containing the conductive filer 3 to penetrate into and fill the interstices Letween the pattern pieces 4 and form a layer 5 of collection of the pattern pieces 4.
Examples of conductive filers for use in the present invention are carbon filer, metal fiber, fiber of vacuurn- evaporated rnetal and the like, These conductive fibers are preferably 0.1 to lOmm, more preferably 0.5 to 5 mrrt, i n average 1 ength and pref crab I y 5 to 50 ~ m, more preferably 10 to 20 a m, in average diameter. T he thermoplastic resin serving as a matrix resin for the conductive filer is, for example, polyvinyl chloride ( P V C ) or copolymer thereof, ethylene - vinyl acetate copolymer ( E V A ), polyethylene ( P E ), polypropylene ( P P ), amorphous poly a ° olefin ( A P A O ) or the like. T he matrix resin contains the conductive fiber preferably in an arnount of 0,5 to 5 wt%. Pel lets '7 containing an electrically conductive fiber can be incorporated into the conductive resin layer along with the conductive filer.
~Q~~~.~~
These pellets can be obtained by incorporating the carne conductive fiber as rnentioned aGove into pellets of a resin similar to the matrix resin for the fiber, T he presence of pellets gives irnproved conductivity to the material. Such pellets are used preferably in a quantity of 1 to lOwt~o based on the matrix resin, T he con ductive backing to be used in the invention is preferably a sheet or the like which is prepared, for example, from the carne matrix resin as above and electrically conductive carbon black kneaded therewith. W hen the backing 1 is not provided, it is desirable to forrn the conductive resin layer over release paper ar the like. T he conductive resin containing the conductive fiber is applied to the hacking 1 or release paper to a thickness preferably of 0.1 to 2 mm, more preferably 0.2 to 0.7mm.
According to the present invention, 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.
T he th errnaplastic resin serving as a matrix resin for the antistatic agent can be the same as the rnatrix resin for the conductive fiber.
T he antistatic agent to be used in the invention is, for example, any of various surfactants, which include, for exarnple, anionic, nonionic, cationic and ~Q~~~~~
ampholytie surfactants as given below, Anionic surfactants Higher alcohol - sulfuric acid ester salts, alkylbenzenesulfonic acid salts, alkylnaphthalenesulfonic acid salts, phosphoric acid ester salts, fatty acid ethylsulfonic acid salts and fatty acid salts, Cationic surfactants Alkylamine salts, polyoxyethylene alkylarnine salts and quaternary arnrnoniurn salts, Nonionic surfactants Partial esters of fatty acid with polyvalent alcohols, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene acyl esters, polyethylene glycols and polyoxyethylene alkylamines., Amphalytic surfactants A ikylbetaines and irnidazoline sulfuric acid esters, U4'hen required, 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, T he antistatic agent is used preferably in an amount of 1 to 5 wt% based on the matrix resin.
Preferably, the pattern pieces 4 are 0,5 to 5 mm in diarneter, A ccordin g to the present invention, the conductive resin layer 1 having pattern pieces 4 ~o~~~oo _7_ 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 ~ is partly present in the penetrating resin portions . 6 to give greatly unproved conductivity to the rnaterial vertically thereof.
I~4oreover, the conductive fiber, which is present in the above - mentioned arnount, 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, A ecordingly, 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, Additionally, 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. T his gives very satisfactory conductivity to the decorative . material, facilitating release of charge from the material itself or frorn the human body in contact with the material. Thus, the decorative material has remarkable conductivity in its entirety, A ccarding to the invention, the pieces of conductive fiber are spread in the conductive resin layer _g_ as entangled with one another horizontally as shown in F I ~ . 1 and as entangled also vertically as seen in F I G . 2 , T he conductive fiber thus entangled three -dirnensionally effectively affords electric conductivity.
G enerally in factories handling electronic parts, operating rooms of hospitals, ete., the charge voltage on the human body due to walking on the floor material is up to 50 V , pref crab I y up to 301~~ , whereas the corresponding value in the case of the present decorative material is surprisingly as low as up to 20 V. T he present material is therefore useful as a floor material for completely eliminating voltage breakdown failures in factories handling I C s, L S I s 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.
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 roorns 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.
T bus, the. present material releases alrnost no dust even in clean rooms and is usable favorably, T he conductive decorative rnaterial of the present ~~2~~~~
_g_ invention have the following advantages.
1 , T he pattern pieces of thermoplastic resin made antistatic by an antistatic agent can be colored as desired, while the thermoplastic resin penetratins into the interstices between the pattern pieces can also be colored as exactly desired, and the conductive fiber incorporated therein is virtually difficult to recognize with the unaided eye. T he material is therefore given both a highly light - colored appearance and electrical conductivity which can not he realized with any conventional conductive floor material.
In order to avoid electrostatic troubles, plastics or rubber floor materials filled with a large quantity of electrically conductive carbon black have heretofore been used in factories handling ICs, LSIs and like electronic parts, laboratories, operating rooms, etc. However, these floor materials, although producing an antistatic effect, have a black surface and are therefore low in decorative effect as interior finishing materials. To overcome this problem, JP-B No. 60-6429 published February 18, 1985, 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 pellets used are black pellets incorporating conductive carbon black, giving a dark color to the material in its entirety. Further when 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 _2_ least 300 V for 10 K V as measured by the Honest Meter method, causing a voltage breakdown of electronic parts.
T he term, "voltage breakdown" refers to the phenomenon t(tat a I ectr i c charge stored i n the human body, wIt i ch can he viewed as a capacitor, flows out into an electronic part to break down the part. T he voltage breakdown invariably occurs when the charge voltage is not lower than 100 V . T o 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 E L S I s, precision electronic parts or the like, laboratories or clean rooms.
A n object of the present invention is to provide an electrically conductive decorative material having an excellent conductive properties along with a decorative effect acrd 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, T he present invention provides an electrically conductive decorative rnaterial characterized in that the material comprises:
(a) a layer of an electrically conductive resin containing an electrically conductive fiber, and (b) a layer of collection of pattern pieces formed over the resin layer and containing an antistatic agent, (c) the fiber - containing conductive resin penetrating into and filling the interstices between the pattern pieces, T he present invention will be described below w i th ref erence to the accornpany i ng draw i ngs, i n wh i ch:
F I G . 1 is a sectional view showing a decorative material of the invention;
F I G . 2 is a fragmentary enlarged view of the surface layer of the material;
F I G. 3 is a fragmentary enlarged view of a surface layer having arranged therein pellets containing an electrically conductive fiber; and F I G . 4 is a rear view of the decorative material of the invention.
I n the drawings, 1 is an electrical ly _ conductive backing which is optionally provided, 2 is conductive resin layer containing an electrically conductive fiber 3 , 4 is pattern piece containing an antistatic agent, 5 is layer of collection of pattern pieces 4 , 6 is electrically conductive resin layer which penetrates into and f i l l the interstices between the pattern pieces 4 , and '~ is pellet containing an electrically conductive fiber.
T he electrically conductive decorative material of the present invention is prepared, for example, by coating an electrically conductive Lacking 1 with a thermoplastic resin 2 in the forrn of a paste and containing an electrically conductive filer 3 , scattering a predetermined quantity of pattern pieces 4 over the resin coating, and subjecting the resulting sheet to an increased pressure with heating preferably at 1G0 to 220 C to thereby cause the thermoplastic resin 2 containing the conductive filer 3 to penetrate into and fill the interstices Letween the pattern pieces 4 and form a layer 5 of collection of the pattern pieces 4.
Examples of conductive filers for use in the present invention are carbon filer, metal fiber, fiber of vacuurn- evaporated rnetal and the like, These conductive fibers are preferably 0.1 to lOmm, more preferably 0.5 to 5 mrrt, i n average 1 ength and pref crab I y 5 to 50 ~ m, more preferably 10 to 20 a m, in average diameter. T he thermoplastic resin serving as a matrix resin for the conductive filer is, for example, polyvinyl chloride ( P V C ) or copolymer thereof, ethylene - vinyl acetate copolymer ( E V A ), polyethylene ( P E ), polypropylene ( P P ), amorphous poly a ° olefin ( A P A O ) or the like. T he matrix resin contains the conductive fiber preferably in an arnount of 0,5 to 5 wt%. Pel lets '7 containing an electrically conductive fiber can be incorporated into the conductive resin layer along with the conductive filer.
~Q~~~.~~
These pellets can be obtained by incorporating the carne conductive fiber as rnentioned aGove into pellets of a resin similar to the matrix resin for the fiber, T he presence of pellets gives irnproved conductivity to the material. Such pellets are used preferably in a quantity of 1 to lOwt~o based on the matrix resin, T he con ductive backing to be used in the invention is preferably a sheet or the like which is prepared, for example, from the carne matrix resin as above and electrically conductive carbon black kneaded therewith. W hen the backing 1 is not provided, it is desirable to forrn the conductive resin layer over release paper ar the like. T he conductive resin containing the conductive fiber is applied to the hacking 1 or release paper to a thickness preferably of 0.1 to 2 mm, more preferably 0.2 to 0.7mm.
According to the present invention, 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.
T he th errnaplastic resin serving as a matrix resin for the antistatic agent can be the same as the rnatrix resin for the conductive fiber.
T he antistatic agent to be used in the invention is, for example, any of various surfactants, which include, for exarnple, anionic, nonionic, cationic and ~Q~~~~~
ampholytie surfactants as given below, Anionic surfactants Higher alcohol - sulfuric acid ester salts, alkylbenzenesulfonic acid salts, alkylnaphthalenesulfonic acid salts, phosphoric acid ester salts, fatty acid ethylsulfonic acid salts and fatty acid salts, Cationic surfactants Alkylamine salts, polyoxyethylene alkylarnine salts and quaternary arnrnoniurn salts, Nonionic surfactants Partial esters of fatty acid with polyvalent alcohols, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene acyl esters, polyethylene glycols and polyoxyethylene alkylamines., Amphalytic surfactants A ikylbetaines and irnidazoline sulfuric acid esters, U4'hen required, 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, T he antistatic agent is used preferably in an amount of 1 to 5 wt% based on the matrix resin.
Preferably, the pattern pieces 4 are 0,5 to 5 mm in diarneter, A ccordin g to the present invention, the conductive resin layer 1 having pattern pieces 4 ~o~~~oo _7_ 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 ~ is partly present in the penetrating resin portions . 6 to give greatly unproved conductivity to the rnaterial vertically thereof.
I~4oreover, the conductive fiber, which is present in the above - mentioned arnount, 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, A ecordingly, 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, Additionally, 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. T his gives very satisfactory conductivity to the decorative . material, facilitating release of charge from the material itself or frorn the human body in contact with the material. Thus, the decorative material has remarkable conductivity in its entirety, A ccarding to the invention, the pieces of conductive fiber are spread in the conductive resin layer _g_ as entangled with one another horizontally as shown in F I ~ . 1 and as entangled also vertically as seen in F I G . 2 , T he conductive fiber thus entangled three -dirnensionally effectively affords electric conductivity.
G enerally in factories handling electronic parts, operating rooms of hospitals, ete., the charge voltage on the human body due to walking on the floor material is up to 50 V , pref crab I y up to 301~~ , whereas the corresponding value in the case of the present decorative material is surprisingly as low as up to 20 V. T he present material is therefore useful as a floor material for completely eliminating voltage breakdown failures in factories handling I C s, L S I s 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.
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 roorns 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.
T bus, the. present material releases alrnost no dust even in clean rooms and is usable favorably, T he conductive decorative rnaterial of the present ~~2~~~~
_g_ invention have the following advantages.
1 , T he pattern pieces of thermoplastic resin made antistatic by an antistatic agent can be colored as desired, while the thermoplastic resin penetratins into the interstices between the pattern pieces can also be colored as exactly desired, and the conductive fiber incorporated therein is virtually difficult to recognize with the unaided eye. T he material is therefore given both a highly light - colored appearance and electrical conductivity which can not he realized with any conventional conductive floor material.
2 . With almost no carbon black or conductive fiber left exposed on the surface, there is little or no likelihood of the material releasing dust ar like particles, 3 , T he material becomes charged to a voltage of as low as shout 7 V per 10 K V as measured by the Honest Meter method, while the charge voltage an the human body on the material is also low, T his eliminates the voltage breakdown of I C s, L S I s and the like or malfunctions of electronic devices.
4 . T he conventional antistatic treatment is generally dependent on humidity, whereas the decorative material of the invention has excellent conductive properties without depending on hurnidity.
5 . T he combination of conductive fiber and conductive pellets affords a further improved conductive -IO-effect.
T he present invention mill be described with reference to the fallowing example.
E xarep I a A P V C 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 orere prepared by add i ng p i gments to port i ons of a compound of eornposition 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 2 mrn. 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.
I t was virtually difficult to recognize the conductive carbon fiber on the surface of the floor ~aaterial with the unaided eye, and the material had a highly light - colored appearance and an excellent decorative effect.
Composition A
P V C ( KanevinyITMaste P S L -10, product of K anegaf uch i C hem i ca 1 I ndustry C o. , L td. ) 100 parts F filler (calcium carbonate) 5 parts P lasticizer (dioctyl phthalate) 40 parts S tab i l i zer ( B a- Z n type) 2 parts C arbon f i ber ( 3 mrn i n average 1 ength and 13 urn in average diameter) 3 parts C ompos i t i on B
P V C ( S S -g0, product of Denki K agaku K ogyo K , K . ) 100 parts Filler (calcium carbonate) 50 parts E poxy res i n ( O -130 P , produc t of Adeka Argus Co., Ltd. ) 4 parts P lasticizer (dioctyl phthalate) 40 parts S tabi 1 izer ( Ba- Zn type) 4 parts Antistatic agent (polyoxyethylene alkylamine salt) 2 parts T he following properties of the floor material obtained were measured at 20'C at a relative humidity.
of 20%, (1) C barge voltage on the material by the Ho nest Meter method (according to J I S L 1094) (2) C barge voltage on the human body due to walkin g ( a c c o r d i n g t o J I S (Japanese Industrial Standard) L 1021 ) (3) Electric resistance between the ground and the surface of the material in contact with the ground by the h( F P A (National Fire Protection Association) method. Table 1 shows the result.
~Q~~~.~a Table 1 Honest Meter method 7 V
Charge vol tape on human body 11 V
N F P A rnethod ( ~ ) Electric resistance of the surface of the material in 1,2 X 10' contact with the ground Electric resistance between the ground and the surface 1,1 X 10' of the material T able 1 shaves that the decorative material of the invention had excellent conductive properties. N o voltage breakdown of I C s, L S I s or the like, or no malfunction of electronic devices occurred due to the use of the present material.
T he present invention mill be described with reference to the fallowing example.
E xarep I a A P V C 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 orere prepared by add i ng p i gments to port i ons of a compound of eornposition 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 2 mrn. 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.
I t was virtually difficult to recognize the conductive carbon fiber on the surface of the floor ~aaterial with the unaided eye, and the material had a highly light - colored appearance and an excellent decorative effect.
Composition A
P V C ( KanevinyITMaste P S L -10, product of K anegaf uch i C hem i ca 1 I ndustry C o. , L td. ) 100 parts F filler (calcium carbonate) 5 parts P lasticizer (dioctyl phthalate) 40 parts S tab i l i zer ( B a- Z n type) 2 parts C arbon f i ber ( 3 mrn i n average 1 ength and 13 urn in average diameter) 3 parts C ompos i t i on B
P V C ( S S -g0, product of Denki K agaku K ogyo K , K . ) 100 parts Filler (calcium carbonate) 50 parts E poxy res i n ( O -130 P , produc t of Adeka Argus Co., Ltd. ) 4 parts P lasticizer (dioctyl phthalate) 40 parts S tabi 1 izer ( Ba- Zn type) 4 parts Antistatic agent (polyoxyethylene alkylamine salt) 2 parts T he following properties of the floor material obtained were measured at 20'C at a relative humidity.
of 20%, (1) C barge voltage on the material by the Ho nest Meter method (according to J I S L 1094) (2) C barge voltage on the human body due to walkin g ( a c c o r d i n g t o J I S (Japanese Industrial Standard) L 1021 ) (3) Electric resistance between the ground and the surface of the material in contact with the ground by the h( F P A (National Fire Protection Association) method. Table 1 shows the result.
~Q~~~.~a Table 1 Honest Meter method 7 V
Charge vol tape on human body 11 V
N F P A rnethod ( ~ ) Electric resistance of the surface of the material in 1,2 X 10' contact with the ground Electric resistance between the ground and the surface 1,1 X 10' of the material T able 1 shaves that the decorative material of the invention had excellent conductive properties. N o voltage breakdown of I C s, L S I s or the like, or no malfunction of electronic devices occurred due to the use of the present material.
Claims (7)
1. An electrically conductive decorative material, comprising:
a resin layer of an electrically conductive resin containing an electrically conductive fiber; and a layer of collection of pattern pieces having interstices therebetween formed over said resin layer and containing an antistatic agent, said electrically conductive fiber containing conductive resin penetrating into and filling said interstices between said pattern pieces.
a resin layer of an electrically conductive resin containing an electrically conductive fiber; and a layer of collection of pattern pieces having interstices therebetween formed over said resin layer and containing an antistatic agent, said electrically conductive fiber containing conductive resin penetrating into and filling said interstices between said pattern pieces.
2. The material as defined in claim 1, wherein an electrically conductive backing is formed on a rear surface of said resin layer.
3. The material as defined in claims 1 or 2, wherein pellets containing an electrically conductive fiber are present in said conductive resin layer.
4. An electrically conductive decorative material comprising:
a resin layer containing 0.5 to 5 weight percent of an electrically conductive fiber which renders said resin layer electrically conductive, and a plurality of pattern pieces spaced apart one from another to form interstices and embedded in said resin layer, said pattern pieces containing an antistatic agent, said electrically conductive fiber containing resin penetrating into and filling said interstices between said pattern pieces, said electrically conductive decorative material having a maximum surface resistivity of 1.3 x 10 4 ohms at 15% relative humidity.
a resin layer containing 0.5 to 5 weight percent of an electrically conductive fiber which renders said resin layer electrically conductive, and a plurality of pattern pieces spaced apart one from another to form interstices and embedded in said resin layer, said pattern pieces containing an antistatic agent, said electrically conductive fiber containing resin penetrating into and filling said interstices between said pattern pieces, said electrically conductive decorative material having a maximum surface resistivity of 1.3 x 10 4 ohms at 15% relative humidity.
5. A material as defined in claim 4, further comprising an electrically conductive backing disposed on a rear surface of said resin layer.
6. A material as defined in claims 4 or 5, further comprising pellets containing an electrically conductive fiber disposed in said resin layer.
7. The electrically conductive decorative material of claims 4, 5 or 6, wherein said material has a decorative appearance in which it is difficult to recognize said electrically conductive fiber with the unaided eye.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP289,052/1989 | 1989-11-07 | ||
| JP1289052A JPH0658000B2 (en) | 1989-11-07 | 1989-11-07 | Conductive decoration material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2029190A1 CA2029190A1 (en) | 1991-05-08 |
| CA2029190C true CA2029190C (en) | 2000-01-11 |
Family
ID=17738201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2029190 Expired - Fee Related CA2029190C (en) | 1989-11-07 | 1990-11-02 | Electrically conductive decorative material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0427203B1 (en) |
| JP (1) | JPH0658000B2 (en) |
| CA (1) | CA2029190C (en) |
| DE (1) | DE69030351T2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0610490U (en) * | 1992-07-16 | 1994-02-10 | 東リ株式会社 | Antistatic floor tiles |
| JP5686536B2 (en) * | 2010-06-30 | 2015-03-18 | 住江織物株式会社 | Recycled tile carpet and its manufacturing method |
Family Cites Families (9)
| 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 |
| DE1928405B2 (en) * | 1968-06-07 | 1975-10-30 | Fujimori Kogyo Co., Ltd., Tokio | Conductive floor covering and the process for its manufacture |
| KR830004645A (en) * | 1979-11-19 | 1983-07-16 | 알란 제륨 후버 | Electroconductive laminate |
| JPS5998967A (en) * | 1982-11-30 | 1984-06-07 | 住友ゴム工業株式会社 | Conductive floor |
| 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 |
| JPS6367141A (en) * | 1986-09-09 | 1988-03-25 | アキレス株式会社 | Antistatic laminated sheet |
| JPH0445881Y2 (en) * | 1987-03-25 | 1992-10-28 | ||
| JPS63272856A (en) * | 1987-04-30 | 1988-11-10 | 三井化学株式会社 | Conductive resin mortar floor |
-
1989
- 1989-11-07 JP JP1289052A patent/JPH0658000B2/en not_active Expired - Fee Related
-
1990
- 1990-11-02 CA CA 2029190 patent/CA2029190C/en not_active Expired - Fee Related
- 1990-11-06 EP EP19900121221 patent/EP0427203B1/en not_active Expired - Lifetime
- 1990-11-06 DE DE1990630351 patent/DE69030351T2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03151460A (en) | 1991-06-27 |
| DE69030351T2 (en) | 1997-07-17 |
| EP0427203A1 (en) | 1991-05-15 |
| CA2029190A1 (en) | 1991-05-08 |
| EP0427203B1 (en) | 1997-04-02 |
| DE69030351D1 (en) | 1997-05-07 |
| JPH0658000B2 (en) | 1994-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |