AU645020B2 - An electrically conductive ink - Google Patents
An electrically conductive ink Download PDFInfo
- Publication number
- AU645020B2 AU645020B2 AU59835/90A AU5983590A AU645020B2 AU 645020 B2 AU645020 B2 AU 645020B2 AU 59835/90 A AU59835/90 A AU 59835/90A AU 5983590 A AU5983590 A AU 5983590A AU 645020 B2 AU645020 B2 AU 645020B2
- Authority
- AU
- Australia
- Prior art keywords
- electrically conductive
- conductive ink
- ink according
- constituent
- ink
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
SAUSTRALIA Form PATENTS ACT 1952 COMPLETE SPECIFICATION
(ORIGINAL)
FOR OFFICE USE Short Tite: Int. Ca: Application Number: Lodged: Corpplete Specification Lodged: Accepted: Lapsed: Published: SPriority: Related Art: TO BE COMPLETED BY APPLICANT Name of Applicant: THORN EMI plc Address of Applicant: 4 Tenterden Street, London, WIA 2AY, United Kingdom.
Actual Inventors: Paul Davidson and Colin Ivan Terry Address for Service: CALLINAN LAWRIE, 278 High Street, Kew, 3101, Victoria, Australia Complete Specification for the invention entitled: "AN ELECTRICALLY CONDUCTIVE INK" The following statement is a full description of this invention, including the best method of performing it known to me:a. ORIGINAL :la AN ELECTRICALLY CONDUCTIVE INK The present invention relates to an electrically conductive ink comprising a binder and an electrically conductive constituent, in particular to a conductive polymer, and to a thick film electrically resistive track made from the same.
Conductive polymer inks are known in the art.
Japanese Patent Application No. 60-218689 laid open under No. 62-7495 (Nihon Shashin Insatsu) discloses examples of an electrically conductive ink in which the binder is a 10 resin chosen from a group termed 'heat -resisting 00 engineering plastics' and in which the electrically conductive powder is silver. This publication further dicloses that tests have shown that gold, silver, copper, nickel and carbon are satisfactory as the electrically conductive powder used in the ink and accordingly claims an electrically conductive ink *0 characterized by the fact that the electrically conductive powder is at least one of the powders chosen from the group consisting of gold, silver, copper, nickel 20 and carbon.
As disclosed by N. Nazarenko and C.N. Lazaridis 'Polymer Thick Film Conductors and Dielectrics for Membrane Switches and Flexible Circuitry' (Publication reprinted -2from the Proceedings of the 1982 ISHM Symposium), it is known that products having a low resistance can be made from silver-based conductive inks.
However, in view of the cost of silver, there is a need for conductive inks containing less silver. Figure 1 which is taken from that publication, shows the variation of resistivity with proportion by weight of blends of silver and a second constituent. Curve 2 is for a silver-graphite blend system; Curve 4 is for a blend system containing a silver-based polymeric ink and a non-conductive aluminium based polymeric ink. As can be seen from the Figure, the resistivity of the ink increases with the proportion of the second constituent.
It is an object of the present invention to provide a low resistivity electrically conductive ink suitable for producing a film-type heating track.
According to the present invention there is provided an electrically conductive ink comprising a binder and an electrically conductive constituent, wherein said electrically conductive constituent comprises a mixture of dendritic i16 nickel and carbon black. Thus, by incorporating dendritic nickel into the electrically conductive constituent, an ink of particularly low resistivity, as compared with the prior art, is achieved.
The inventors have found that an ink of especially low resistivity can be achieved by a mixture of a dendritic nickel and carbon, which is a contradistinction 0:2: 0 to the teachings of the prior
S
:3: art, as shown in Figure 1.
je ca-b.-y-,--he-4~Av4d4i-4-i--me^--a-_ _n 4si---ef-M--ekel.
Electrically conductive inks provided in accordance with the present invention are particularly suitable for the manufacture of heating elements for large areas such as door mirrors in motor vehicles. Heating elements so produced compare favourably in both cost and heating effect with prior art heating elements used for such applications.
An embodiment of the present invention will now be described, by way of example only, and with reference to the accompanying drawings of which: 9* S* Figure 1 shows variation in resitivity with relative proportions of constituents in prior art inks; *9RO Sand Figure 2 shows variation in resistivity with relative proportions of nickel and carbon in an ink provided in accordance with the present invention.
It has been found that a method of manufacturing the Re.
electrically conductive which employs a powdered dendritic metal produces an ink with high electrical conductivity as *a 20 compared to the prior art.
A dendritic metal is one in which the surface of the metal appears spiky, and in powdered form, the granules are generally of equiaxial shape.
A method of making an electrically conductive ink provided in accordance with the present invention is described below.
a) A stock solution of the binder is formed by dissolving g of poly (vinyl butyral) granules (Butvar B76) in 100g of N-methyl-2-pyrrolidone. This is mixed using a high speed stirrer for 1 hour and then allowed to settle until the air disperses.
b) 55 ml of carbon black (type 40220) is baked for 1 hour at 125°C to remove any moisture. This is used with an equal volume of dendritic metal powder, nickel has been found to be particularly suitable for obtaining a high-conductivity ink, untilan homogenous blend is obtained. This forms the electrically conductive constituent.
9.
c) A screen printing medium is produced by combining 50 g of Blythe medium type 63/182 with 5g of unaccelerated unsaturated polyester in styrene (manufactured by Scott Bader). 50g of the binder and 100 g of the conductive constituent are added to 55g of the screen printing medium. The mixture is then passed through a triple roll mill until the theological properties suitable for screen printing known to those skilled in the art are 0 obtained. The resulting ink is screen printed in the 60 20 desired pattern onto a substrate and cured at a temperature of 800C.
The ink exhibits good adhesion to a variety of types of substrates, including alumina, polyester, glass and painted surfaces. The resistivity of tracks made from this ink was in the range of from 1.5 to 2.0 ohms per square.
Claims (9)
1. An electrically conductive ink comprising a binder and an electrically conductive constituent, wherein said electrically conductive constituent comprises a mixture of dendritic nickel and carbon black.
2. The electrically conductive ink according to Claim 1, wherein said electrically conductive constituent includes dendritic nickel as a percentage by volume in the range from 30% to
3. The electrically conductive ink according to Claim 2, wherein said electrically conductive constituent includes dendritic nickel as a percentage by volume in the range from 33% to s
4. The electrically conductive ink according to Claim 3, wherein said electrically conductive constituent includes dendritic nickel as a percentage by volume in the range from 36% to 67%.
5. The electrically conductive ink according to Claim 4, wherein said o electrically conductive constituent consists of dendritic nickel and carbon black in equal proportions by volume.
6. The electrically conductive ink according to any one of the preceding claims, wherein the binder comprises a polymer.
7. The electrically conductive ink according to Claim 6, wherein said polymer comprises a thermoplastic resin. o
8. The electrically conductive ink according to Claim 6, wherein said binder comprises polyvinyl butyral.
9. A film-type track for use as a heating element constructed from an electrically conductive ink according to any one of the preceding claims. An electrically conductive ink as claimed in Claim 1, substantially as described herein with reference to Fig. 2 of the accompanying drawings. DATED this 28th day of October 1993. THORN EMI plc By their Patent Attorneys: CALLINAN LAWRIE
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898917078A GB8917078D0 (en) | 1989-07-26 | 1989-07-26 | An electrically conductive ink |
| GB8917078 | 1989-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU5983590A AU5983590A (en) | 1991-01-31 |
| AU645020B2 true AU645020B2 (en) | 1994-01-06 |
Family
ID=10660650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU59835/90A Ceased AU645020B2 (en) | 1989-07-26 | 1990-07-26 | An electrically conductive ink |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0410765A3 (en) |
| JP (1) | JPH03143967A (en) |
| AU (1) | AU645020B2 (en) |
| CA (1) | CA2021938A1 (en) |
| GB (1) | GB8917078D0 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0753410A3 (en) * | 1995-06-28 | 1997-06-25 | Riso Kagaku Corp | Ink jet device and conductive liquid |
| JP4759899B2 (en) * | 2001-09-28 | 2011-08-31 | 大日本印刷株式会社 | Electromagnetic shielding material and flat cable with electromagnetic shielding |
| US8167393B2 (en) | 2005-01-14 | 2012-05-01 | Cabot Corporation | Printable electronic features on non-uniform substrate and processes for making same |
| WO2006076606A2 (en) | 2005-01-14 | 2006-07-20 | Cabot Corporation | Optimized multi-layer printing of electronics and displays |
| WO2006076607A1 (en) * | 2005-01-14 | 2006-07-20 | Cabot Corporation | Ink-jet printing of passive electricalcomponents |
| US8383014B2 (en) | 2010-06-15 | 2013-02-26 | Cabot Corporation | Metal nanoparticle compositions |
| US7824466B2 (en) | 2005-01-14 | 2010-11-02 | Cabot Corporation | Production of metal nanoparticles |
| US20060189113A1 (en) | 2005-01-14 | 2006-08-24 | Cabot Corporation | Metal nanoparticle compositions |
| US8158032B2 (en) * | 2010-08-20 | 2012-04-17 | Xerox Corporation | Silver nanoparticle ink composition for highly conductive features with enhanced mechanical properties |
| CN107071934A (en) * | 2017-04-19 | 2017-08-18 | 苏州康智元智能科技有限公司 | Graphene line with heating function and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3767519A (en) * | 1971-02-03 | 1973-10-23 | Matsushita Electric Ind Co Ltd | Electrical conductive film |
| EP0136095A2 (en) * | 1983-09-09 | 1985-04-03 | Ing. C. Olivetti & C., S.p.A. | Ink for printers with a selective jet of electrically conductive ink |
| US5002826A (en) * | 1988-09-01 | 1991-03-26 | James River Corporation Of Virginia | Heaters for use in microwave ovens |
-
1989
- 1989-07-26 GB GB898917078A patent/GB8917078D0/en active Pending
-
1990
- 1990-07-25 CA CA 2021938 patent/CA2021938A1/en not_active Abandoned
- 1990-07-26 EP EP19900308226 patent/EP0410765A3/en not_active Withdrawn
- 1990-07-26 JP JP19640790A patent/JPH03143967A/en active Pending
- 1990-07-26 AU AU59835/90A patent/AU645020B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3767519A (en) * | 1971-02-03 | 1973-10-23 | Matsushita Electric Ind Co Ltd | Electrical conductive film |
| EP0136095A2 (en) * | 1983-09-09 | 1985-04-03 | Ing. C. Olivetti & C., S.p.A. | Ink for printers with a selective jet of electrically conductive ink |
| US5002826A (en) * | 1988-09-01 | 1991-03-26 | James River Corporation Of Virginia | Heaters for use in microwave ovens |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8917078D0 (en) | 1989-09-13 |
| AU5983590A (en) | 1991-01-31 |
| EP0410765A2 (en) | 1991-01-30 |
| EP0410765A3 (en) | 1991-05-29 |
| CA2021938A1 (en) | 1991-01-27 |
| JPH03143967A (en) | 1991-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5181006A (en) | Method of making an electrical device comprising a conductive polymer composition | |
| US5093036A (en) | Conductive polymer composition | |
| US5993698A (en) | Electrical device containing positive temperature coefficient resistor composition and method of manufacturing the device | |
| AU645020B2 (en) | An electrically conductive ink | |
| US4545926A (en) | Conductive polymer compositions and devices | |
| US4722853A (en) | Method of printing a polymer thick film ink | |
| EP0300685B1 (en) | Improvements in or relating to thick film track material | |
| JPH08339904A (en) | Positive temperature coefficient composition | |
| KR100655347B1 (en) | Thick film conductor compositions for use in membrane switch applications | |
| US4318881A (en) | Method for annealing PTC compositions | |
| CN1312703C (en) | Resistance composition, electrical resistor using said composition and its mfg. method | |
| US4435214A (en) | Conductive compositions | |
| EP0057456A2 (en) | Conductor compositions | |
| US4986933A (en) | Resistor composition | |
| CN1305196A (en) | Wafer-type thermosensitive oxide resistor | |
| CN1412782A (en) | Conduction composite material with positive temperature coefficient | |
| JPH03285301A (en) | Carbon paste composite for resistor | |
| CN110650583A (en) | Communication circuit layer structure and circuit printing method thereof | |
| JPH0799721B2 (en) | Method for producing PTC composition | |
| JPH03269908A (en) | Thick film composition and thick film hybrid integrated circuit (ic) using the same | |
| JPS6142820A (en) | Anisotropic conductive sheet | |
| Iles | Ruthenium resistor glazes for thick film circuits | |
| JPS6456775A (en) | Electrically conductive coating | |
| Smith et al. | The Design of Composite Resistors | |
| JPH09180906A (en) | Positive temperature coefficient device |