WO2004042745A1 - Ptc材料およびその製造方法並びにこのptc材料を用いた回路保護部品およびその製造方法 - Google Patents
Ptc材料およびその製造方法並びにこのptc材料を用いた回路保護部品およびその製造方法 Download PDFInfo
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- WO2004042745A1 WO2004042745A1 PCT/JP2003/014091 JP0314091W WO2004042745A1 WO 2004042745 A1 WO2004042745 A1 WO 2004042745A1 JP 0314091 W JP0314091 W JP 0314091W WO 2004042745 A1 WO2004042745 A1 WO 2004042745A1
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- Prior art keywords
- polymer ptc
- polymer
- ptc material
- electrode
- layer
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 47
- 238000010521 absorption reaction Methods 0.000 claims abstract description 45
- 239000006229 carbon black Substances 0.000 claims abstract description 37
- 239000010410 layer Substances 0.000 description 40
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 32
- 235000019241 carbon black Nutrition 0.000 description 31
- 238000004898 kneading Methods 0.000 description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 239000011889 copper foil Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229920001903 high density polyethylene Polymers 0.000 description 6
- 239000004700 high-density polyethylene Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 229920001940 conductive polymer Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- KERTUBUCQCSNJU-UHFFFAOYSA-L nickel(2+);disulfamate Chemical compound [Ni+2].NS([O-])(=O)=O.NS([O-])(=O)=O KERTUBUCQCSNJU-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- YDLQKLWVKKFPII-UHFFFAOYSA-N timiperone Chemical compound C1=CC(F)=CC=C1C(=O)CCCN1CCC(N2C(NC3=CC=CC=C32)=S)CC1 YDLQKLWVKKFPII-UHFFFAOYSA-N 0.000 description 1
- 229950000809 timiperone Drugs 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/027—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient consisting of conducting or semi-conducting material dispersed in a non-conductive organic material
Definitions
- the present invention relates to a PTC material, a method of manufacturing the same, and a circuit protection component using the PTC material and a method of manufacturing the same.
- the present invention relates to a PTC material having a polymer and carbon black, a method for producing the same, a circuit protection component using the PTC material, and a method for producing the same.
- conductive polymers there are those in which conductive particles such as carbon black and metal are dispersed in an organic polymer. Further, some of these conductive polymers are known to exhibit positive temperature coefficient (hereinafter referred to as PTC) characteristics.
- the PTC characteristic is a characteristic that shows a sudden increase in the resistance value with a rise in temperature in a specific temperature range (called switching temperature).
- the conductive polymer having the PTC property is called a polymer PTC material (hereinafter referred to as a PTC material).
- Applications of PTC materials include self-temperature control heaters and circuit protection components (overheating and overcurrent protection).
- circuit protection components using PTC materials.
- the PTC material When an overcurrent flows through an electrical circuit using circuit protection components, the PTC material generates heat on its own. Then, the PTC material thermally expands and the resistance value increases rapidly. As a result, the current is attenuated to a safe small area. The state of the minute current is maintained until the user turns off the power. In this case, the power consumption of the It is desirable that the resistance value be as low as possible to reduce the force. Furthermore, it is desirable that the breakdown voltage be as high as possible to completely shut off the overcurrent in the event of an abnormality. Therefore, as the characteristics of the PTC material, it is desirable that the specific resistance at room temperature be as low as possible and the specific resistance above the switching temperature be as high as possible.
- Carbon black is widely used as conductive particles of PTC materials.
- the electrical properties of PTC materials are affected by the properties of carbon black.
- Indicators of the properties of carbon black include particle size, specific surface area, structure, surface pH, and volatile content.
- the particle size is measured by an arithmetic mean using an electron microscope.
- the specific surface area is measured by the amount of nitrogen adsorbed according to JISK 6217.
- the structure is measured by dibutyl phthalate (DBP) absorption according to JISK 612/17. The higher the DBP absorption, the more developed the structure of the car pump rack.
- DBP dibutyl phthalate
- a carbon black having a particle diameter D of 20 to 150 nm and a ratio S ZD of specific surface area S (m V g) to D not exceeding 10 is special. It is disclosed in Japanese Unexamined Patent Publication No. Sho 55-5-7804. Further, the average particle diameter D is in 8 0-1 1 0 nm, 08? Absorption of 1 1 0-1 4 0111 1/1 0 0 8 Deari either Tsu specific surface area of 2 1 ⁇ 2 3 m 2 Carbon black as Zg is disclosed in Japanese Patent Application Laid-Open No. 5-345580. It is stated that the use of these carbon blacks provides a PTC material with low room temperature resistivity and excellent PTC properties.
- the present invention solves the above-mentioned conventional problems, and provides a PTC material that satisfies excellent PTC characteristics and low room temperature specific resistance, a method for manufacturing the same, and a circuit protection component using the PTC material and a method for manufacturing the same.
- the purpose is to: Disclosure of the invention
- the present invention provides a PTC material comprising a polymer and a polymer PTC material including a force pump rack, wherein a ratio of a DBP absorption amount and a C-DBP absorption amount of the carbon black is greater than 1.0 and 1.1 or less.
- FIG. 1A is a diagram showing an Adarige structure of carbon black according to Embodiment 1 of the present invention.
- FIG. 1B is a diagram showing an agglomerate structure of a carbon black according to Embodiment 1 of the present invention.
- FIG. 2 shows the kneading time and the resistance at the switching temperature (130 ° C).
- FIG. 3 is a diagram illustrating the relationship between the resistance and the room temperature resistivity.
- FIG. 3A is a perspective view of a multilayer circuit protection component according to Embodiment 2 of the present invention.
- FIG. 3B is a sectional view taken along line AA in FIG. 3A.
- 4A to 4C are diagrams illustrating a method of manufacturing a multilayer circuit protection component according to Embodiment 2 of the present invention.
- 5A to 5C are diagrams showing a method for manufacturing a multilayer circuit protection component according to Embodiment 2 of the present invention.
- 6A and 6B are diagrams showing a method of manufacturing a multilayer circuit protection component according to Embodiment 2 of the present invention.
- FIG. 7 is a diagram comparing resistance temperature characteristics of the comparative example and the multilayer circuit protection component according to the second embodiment of the present invention.
- the PTC material in the present embodiment has a polymer and a carbon black.
- Conductive carbon black click to be used as particles the particle size of 4 0 ⁇ : 1 3 0 nm, 0 specific surface area of 2 0 ⁇ 5 m 2 Z g, DBP absorption amount 5 0 ⁇ : LSO ml Z l OO Use the one in the range of g.
- the PTC material It can achieve both room temperature specific resistance and excellent PTC characteristics.
- a thermoplastic resin is used as the polymer. The thermoplastic is selected according to the desired switching temperature.
- polyethylene when the switching temperature is 100 or more, polyethylene is used, and more preferably, a copolymer of high-density polyethylene, ethylene-vinyl acetate, or the like is used.
- an antioxidant in order to prevent thermal oxidation of the polymer, an antioxidant may be added in an amount of 0.01 to 1.0 wt%.
- the following equipment is used as the equipment for kneading the above components, that is, the polymer and the PTC material composition composed of the force pump rack.
- the batch type includes two or three hot rolls, a non-mixing mixer, a kneader, and the like.
- the continuous type includes a single-screw kneading extruder and a twin-screw kneading extruder. Further, the fineness of the kneaded PTC material can further improve the uniformity of the material.
- Figure 1A shows an aggregate structure. This is a primary agglomerate with a structure in which primary particles are fused, and is not easily broken.
- Figure 1B shows an agglomerate structure. This is a structure in which the above aggregate structures are assembled, and is called a secondary aggregate. Then, when subjected to shearing force, it shifts to aggregate units.
- the dispersion of carbon black is the transfer of agglomerate structure to agglomerate structure by applying shear to carbon black in the polymer.
- DBP absorption is the sum of aggregate structure and agglomeration.
- Is an index representing An appropriate indicator that represents only the aggregate structure is C-DBP absorption. The amount of C-DBP absorption is specified in ASTM D 349 3 as follows.
- absorption ratio the ratio between the DBP absorption amount of carbon black dispersed in the polymer and the C-DBP absorption amount (hereinafter referred to as absorption ratio).
- the ratio of the amount of DBP absorption to the amount of C—DBP absorption means a value obtained by dividing the amount of DBP absorption by the amount of C-DBP absorption.
- the absorption ratio is greater than 1.1 and less than or equal to 2.0
- kneading or grinding of the PTC material is further performed.
- the absorption ratio is set to be greater than 1.0 and not more than 1.1
- the carbon black is sufficiently dispersed in the polymer.
- the absorption ratio is within the above range, it is not desirable to further knead or pulverize the PTC material. This increases the room temperature resistivity of the PTC material and wastes energy.
- the DBP absorption and C-DBP absorption of carbon black in the PTC material are measured as follows. First, the polymer is decomposed by heating the PTC material in a nitrogen atmosphere at a temperature of at least 520. Next, only the power pump rack Take out and measure the amount of each absorption.
- the composition of the PTC material is as follows. Mitsubishi Chemical # 3030B (particle diameter: 55 nm, specific surface area: 32 m 2 / g, DBP: 130 ml Zl100 g) made by Mitsubishi Chemical Use up to 56 wt%.
- HZ520B Density: 0.964 g Zcc, melting point: 135 MFR: 0.33 g Zl0 min
- Tominox TT registered trademark manufactured by Yoshitomi Fine Chemical is used as an antioxidant.
- the above-mentioned components are kneaded for 5 to 30 minutes by two hot rolls heated at 170, and the kneaded material is taken out of the two hot rolls in a sheet form. Thereafter, the sheet is cut into a predetermined outer shape by a die press to produce a sheet-like PTC layer having a thickness of about 0.16 mm.
- the above PTC layer is sandwiched between two electrolytic copper foils (thickness: about 35 m) of the same outer shape, and the temperature is 150 :, the degree of vacuum is about 4 kPa, and the surface pressure is about 80 kg. Perform vacuum heat pressing for about 1 minute under the condition of / cm 2 . In this way, they are integrally fixed by heating and pressing.
- the electrolytic copper foil used here constitutes the electrode, and the surface of the copper foil on the side to be bonded to the PTC layer is roughened by etching.
- the adhesive strength between the PTC layer and the electrode is increased, and peeling of the bonded surface is less likely to occur.
- the integrally laminated sandwich-like laminate is heat-treated (110 to 120 for 1 hour).
- An electron beam is irradiated at about 40 Mrad to crosslink high-density polyethylene.
- a 5 mm X 5 mm square piece is cut out from the sandwich laminate. Then, the lead wire is attached to each electrode to complete the circuit protection component.
- Table 1 shows the change in DBP absorption and C-DBP absorption with mixing time.
- FIG. 2 shows the relationship between the kneading time, the resistance value at the switching temperature (130), and the room temperature specific resistance.
- the numerical values (52 wt% _56 wt%) in FIG. 2 indicate the mixing ratio of the car pump rack.
- DBP absorption amount and C The unit of DBP absorption amount is 100 g of m 1.
- the kneading time at which the absorption ratio becomes 1.1 or less is 15 minutes or more, almost no improvement in PTC characteristics is observed.
- Kneading (residence time: about 5 minutes) with a single screw extruder heated at 190.
- the kneaded material obtained by the above four kneading methods is melted by two hot rolls heated at 170, and then taken out in a sheet form. Then, these sheets are cut into a predetermined outer shape by a die press to produce a sheet-like PTC layer having a thickness of about 0.16 mm.
- Table 2 shows the change in the DBP absorption amount and the C-DBP absorption amount in the above four kneading methods, and the resistance value at the switching temperature (130).
- the PTC layer 1 is made of a PTC material having high-density polyethylene and carbon black, and has a rectangular parallelepiped shape.
- the absorption ratio of carbon black contained in the PTC layer 1 is in a range of more than 1.0 and 1.1 or less.
- First main electrode 2 A is located on the first surface of PTC layer 1.
- the first sub-electrode 2B is located on the same plane as the first main electrode 2A, and is independent from the first main electrode 2A.
- the second main electrode 2C is located on the second surface of the PTC layer 1 opposite to the first surface.
- the second sub-electrode 2D is located on the same plane as the second main electrode 2C, and is independent of the second main electrode 2C.
- the second sub-electrode 2D, the first main electrode 2A, the first sub-electrode 2B, and the second main electrode 2C are each made of an electrolytic copper foil or the like.
- the first side electrode 3 A made of a nickel plating layer is provided so as to extend around the entire surface of one side surface of the PTC layer 1, the edge of the first main electrode 2 A, and the second sub electrode 2 D. . Then, the first main electrode 2A and the second sub-electrode 2D are electrically connected.
- the second side electrode 3B is opposed to the first side electrode 3A in the PTC layer 1 and the entire other side surface and the edges of the first sub electrode 2B and the second main electrode 2C. It is provided so as to wrap around the part. Then, the second side surface electrode 3B made of the nickel plating layer is connected to the first sub-electrode 2B.
- the second main electrode 2C is electrically connected.
- the first protective layer 4A and the second protective layer 4B are made of an epoxy-modified acrylic resin. Then, they are provided on the outermost layers of the first surface and the second surface of the PTC layer 1, respectively. In addition, in addition to the epoxy-modified acrylic resin, a mixture of an epoxy resin and an acrylic resin may be used.
- First inner layer main electrode 5A is provided inside PTC layer 1 and provided in parallel with first main electrode 2A and second main electrode 2C. Then, it is electrically connected to the second side surface electrode 3B.
- the first inner sub-electrode 5B is located on the same plane as the first inner main electrode 5A, and is provided independently of the first inner main electrode 5A. And it is electrically connected to the first side electrode 3A.
- the second inner-layer main electrode 5C is located inside the PTC layer 1 and is provided in parallel with the first main electrode 2A and the second main electrode 2C, and is connected to the first side electrode 3A. It is electrically connected.
- the second inner-layer sub-electrode 5D is located on the same plane as the second inner-layer main electrode 5C, is provided independently of the second inner-layer main electrode 5C, and is electrically connected to the second side electrode 3B. It is connected to the.
- the multilayer circuit protection component according to the second embodiment of the present invention includes a plurality of PTC layers 1 made of a PTC material, an upper surface of the uppermost PTC layer 1, a lower surface of the lowermost PTC layer 1, and Each of the plurality of electrodes 2A to 2D and 5A to 5D is provided, and any one of the plurality of electrodes 2A to 2D and 5A to 5D is any of the electrodes.
- the first side electrode 3A and the second side electrode 3A and the second side electrode are not directly electrically connected to the electrode adjacent to the first electrode, and are also directly electrically connected to the electrode further adjacent to the adjacent electrode. Since the side electrode 3B is provided, the breakdown voltage in the event of a circuit abnormality can be increased. And since it has a laminated structure, the effective counter electrode area increases. As a result, the effect of reducing the product resistance can be obtained.
- FIGS. 4A to 4C, FIGS. 5A to 5C, FIGS. 6A and 6B are manufacturing process diagrams showing a method of manufacturing the multilayer circuit protection component according to the second embodiment of the present invention.
- a pattern of multiple elements is formed on an electrolytic copper foil (thickness: about 80 m) with the same outer shape as the PTC layer 11 in Fig. Prepare 1 2.
- the first and second main electrodes 2A and 2C and the first and second sub-electrodes 2B and 2B are formed.
- the gap is formed to make the 2D and the first and second inner layer main electrodes 5A and 5C independent of the first and second inner layer sub-electrodes 5B and 5D.
- the groove 13B is used to cut the electrolytic copper foil when dividing into individual pieces.
- the PTC layer 11 and the foil-like electrode 12 are alternately overlapped so that the electrode 12 is the outermost layer, and the temperature is 150, the vacuum degree is about 4 kP a, Heat-press molding with a vacuum heat press at a surface pressure of 80 kcm 2 for about 1 minute.
- the integrally fixed laminate 14 shown in FIG. 5A is obtained.
- the laminated body 14 integrally fixed is subjected to a heat treatment (110: 1 to 120 for 1 hour).
- high-density polyethylene is cross-linked by irradiating an electron beam at about 4 OM rad in an electron beam irradiation device.
- elongated openings 15 at fixed intervals are formed in the laminate 14 by a punching press, dicing, or the like. At that time, the desired width in the longitudinal direction of the multilayer electronic component is left.
- a resin composition that can be used for both UV curing and heat curing except for the periphery of the opening 15 is provided on the upper and lower surfaces of the laminate 14 having the opening 15. Perform screen printing. Next, temporary curing is performed on one side at a time in a UV curing furnace, and then, main curing is performed simultaneously on both sides in a heat curing furnace to form a protective layer 16.
- Known materials such as an epoxy-modified acrylic resin can be used as the resin composition.
- side electrodes 17 are formed on portions of the laminate 14 where the protective layer 16 is not formed and on inner walls of the openings 15.
- the side electrode 17 is formed, for example, in a nickel sulfamate bath for about 60 minutes under the condition of a current density of about 4 AZ dm 2 , This is a nickel plating layer having a thickness of m.
- the laminate 14 shown in FIG. 6A is divided into individual pieces by dicing.
- the multilayer circuit protection component 18 according to the second embodiment of the present invention shown in FIG. 6B is completed.
- FIG. 7 shows a comparison between the resistance temperature characteristics of the comparative example and the multilayer circuit protection component 18 in the second embodiment. As is clear from FIG. 7, the room temperature resistance values are almost the same in both cases. On the other hand, the resistance value equal to or higher than the switching temperature is about 0.5 orders of magnitude higher in the multilayer circuit protection component 18 in the second embodiment of the present invention than in the multilayer circuit protection component of the comparative example. I understand.
- the laminate 14 is formed by using three PTC layers 11 and four foil electrodes 12.
- the number of layers is not limited to this, and more or less layers may be stacked.
- the PTC material of the present invention has a polymer and carbon black, and the absorption ratio of the pump rack in the PTC material is set to be greater than 1.0 and equal to or less than 1.1. I have.
- the carbon black in the polymer is dispersed with an appropriate degree of uniformity, thereby achieving an excellent effect that both excellent PTC characteristics and low room temperature resistivity can be achieved.
- the PTC material of the present invention can achieve both excellent PTC characteristics and low room temperature specific resistance, it is useful as a self-temperature control heater and a circuit protection component.
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- Dispersion Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004549610A JPWO2004042745A1 (ja) | 2002-11-06 | 2003-11-05 | Ptc材料およびその製造方法並びにこのptc材料を用いた回路保護部品およびその製造方法 |
US10/532,796 US20060049385A1 (en) | 2002-11-06 | 2003-11-05 | Ptc material and method for producing same, and circuit protection part using such ptc material and method for manufacturing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002322250 | 2002-11-06 | ||
JP2002-322250 | 2002-11-06 |
Publications (1)
Publication Number | Publication Date |
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WO2004042745A1 true WO2004042745A1 (ja) | 2004-05-21 |
Family
ID=32310386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/014091 WO2004042745A1 (ja) | 2002-11-06 | 2003-11-05 | Ptc材料およびその製造方法並びにこのptc材料を用いた回路保護部品およびその製造方法 |
Country Status (5)
Country | Link |
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US (1) | US20060049385A1 (ja) |
JP (1) | JPWO2004042745A1 (ja) |
CN (1) | CN1708815A (ja) |
TW (1) | TW200411683A (ja) |
WO (1) | WO2004042745A1 (ja) |
Cited By (1)
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WO2023100796A1 (ja) * | 2021-12-03 | 2023-06-08 | 住友化学株式会社 | 液晶ポリエステル組成物及びその成形体 |
Families Citing this family (1)
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US20080127771A1 (en) * | 2006-12-04 | 2008-06-05 | General Electric Company | Steering wheels with integrally molded positive temperature coefficient materials |
Citations (2)
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JPH0969416A (ja) * | 1995-08-31 | 1997-03-11 | Tdk Corp | 正の温度特性を持つ有機抵抗体 |
JP2002164201A (ja) * | 2000-11-24 | 2002-06-07 | Murata Mfg Co Ltd | 有機正特性サーミスタ組成物および有機正特性サーミスタ素子 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4777351A (en) * | 1984-09-14 | 1988-10-11 | Raychem Corporation | Devices comprising conductive polymer compositions |
US5554679A (en) * | 1994-05-13 | 1996-09-10 | Cheng; Tai C. | PTC conductive polymer compositions containing high molecular weight polymer materials |
US5582770A (en) * | 1994-06-08 | 1996-12-10 | Raychem Corporation | Conductive polymer composition |
TW298653B (ja) * | 1995-02-28 | 1997-02-21 | Yunichica Kk | |
US6852790B2 (en) * | 2001-04-06 | 2005-02-08 | Cabot Corporation | Conductive polymer compositions and articles containing same |
-
2003
- 2003-11-05 TW TW092130936A patent/TW200411683A/zh unknown
- 2003-11-05 US US10/532,796 patent/US20060049385A1/en not_active Abandoned
- 2003-11-05 JP JP2004549610A patent/JPWO2004042745A1/ja active Pending
- 2003-11-05 CN CN200380102126.XA patent/CN1708815A/zh active Pending
- 2003-11-05 WO PCT/JP2003/014091 patent/WO2004042745A1/ja active Application Filing
Patent Citations (2)
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JPH0969416A (ja) * | 1995-08-31 | 1997-03-11 | Tdk Corp | 正の温度特性を持つ有機抵抗体 |
JP2002164201A (ja) * | 2000-11-24 | 2002-06-07 | Murata Mfg Co Ltd | 有機正特性サーミスタ組成物および有機正特性サーミスタ素子 |
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WO2023100796A1 (ja) * | 2021-12-03 | 2023-06-08 | 住友化学株式会社 | 液晶ポリエステル組成物及びその成形体 |
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