DE3522084A1 - Plastic composition which is an electrical insulator and a good heat conductor and contains aluminium powder particles as filler, and a process for the preparation thereof - Google Patents
Plastic composition which is an electrical insulator and a good heat conductor and contains aluminium powder particles as filler, and a process for the preparation thereofInfo
- Publication number
- DE3522084A1 DE3522084A1 DE19853522084 DE3522084A DE3522084A1 DE 3522084 A1 DE3522084 A1 DE 3522084A1 DE 19853522084 DE19853522084 DE 19853522084 DE 3522084 A DE3522084 A DE 3522084A DE 3522084 A1 DE3522084 A1 DE 3522084A1
- Authority
- DE
- Germany
- Prior art keywords
- filler
- good heat
- powder particles
- aluminium powder
- preparation
- 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.)
- Withdrawn
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 18
- 229920003023 plastic Polymers 0.000 title claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 239000002245 particle Substances 0.000 title claims abstract description 13
- 239000000945 filler Substances 0.000 title claims abstract description 10
- 239000000203 mixture Substances 0.000 title claims abstract 4
- 229910052782 aluminium Inorganic materials 0.000 title abstract description 5
- 239000000843 powder Substances 0.000 title abstract description 3
- 239000004411 aluminium Substances 0.000 title abstract 2
- 239000004020 conductor Substances 0.000 title 1
- 239000000615 nonconductor Substances 0.000 title 1
- 239000002344 surface layer Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 7
- 229920001169 thermoplastic Polymers 0.000 claims description 6
- 239000004416 thermosoftening plastic Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 claims 1
- 238000010292 electrical insulation Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/16—Solid spheres
- C08K7/18—Solid spheres inorganic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/305—Polyamides or polyesteramides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
Description
Die Erfindung betrifft eine elektrisch isolierende, gut wärmeleitende Kunststoffmasse mit als Füllstoff enthaltenen Aluminiumpulverpartikeln.The invention relates to an electrically insulating, good thermally conductive plastic compound with filler Aluminum powder particles.
Zur Ableitung von Verlustwärme, die in elektronischen und elektrischen Bauelementen, Schaltungen und Geräten entsteht, werden Kunststoffe benötigt, die zugleich elektrisch isolierend sind und eine relativ hohe Wärmeleitfähigkeit von mindestens 2 W/m.K (=Watt/meter Kelvin) besitzen.To dissipate heat lost in electronic and electrical components, circuits and devices arises, plastics are needed that at the same time are electrically insulating and have a relatively high thermal conductivity of at least 2 W / m.K (= watt / meter Kelvin).
Die Wärmeleitfähigkeit ungefüllter, nicht geschäumter Kunststoffe liegt zwischen etwa 0,2 und 0,5 W/m.K. Bei duroplastischen Preß- oder Vergußmassen werden durch Zugabe von ca. 70 Gew.% Quarz Werte um 2 W/m.K erreicht. Thermoplaste mit derartigen Füllgraden an elektrisch isolierenden, aber gut wärmeleitenden und damit in der Regel sehr harten Füllstoffen werden kaum eingesetzt, da erhebliche Verarbeitungsprobleme (Abrasion) auftreten.The thermal conductivity of unfilled, not foamed Plastics is between about 0.2 and 0.5 W / m.K. At thermosetting molding or potting compounds are made by Addition of approx. 70 wt.% Quartz values around 2 W / m.K reached. Thermoplastics with such filling levels on electrical insulating, but good thermal conductivity and therefore in the Usually very hard fillers are hardly used because considerable processing problems (abrasion) occur.
Metallpulver, dessen Partikel von einem vernetzten Polymeren umhüllt sind, so daß eine isolierende und bei Scherung beständige Schicht vorliegt, können für Kunststoffmassen mit hoher Wärmeleitfähigkeit bei guter elektrischer Isolation eingesetzt werden.Metal powder, its particles from a cross-linked polymer are wrapped so that an insulating and at Shear resistant layer is available for plastic masses with high thermal conductivity with good electrical insulation.
Eine solche Kunststoffmasse ist beispielsweise in der deutschen Patentanmeldung P 34 42 031.1 vorgeschlagen worden. Dabei wird ein Füllstoff verwendet, der aus in möglichst dichter Packung vorliegenden Metallkörnern besteht, die mit einer allseitig durch Vernetzen hergestellten Kunststoffumhüllung versehen sind.Such a plastic mass is for example in the German patent application P 34 42 031.1 proposed been. A filler is used which consists of in as dense packing of metal grains as possible exists, which is produced by cross-linking with all sides Plastic cover are provided.
In der deutschen Patentanmeldung P 34 21 105 wird ein Thermoplast mit den eingangs genannten Eigenschaften vorgeschlagen, der Aluminiumpulverpartikel enthält, die an ihrer Oberfläche mit vernetzten Polyolefinen umhüllt sind.In German patent application P 34 21 105 a Thermoplastic with the properties mentioned above proposed that contains aluminum powder particles coated on its surface with cross-linked polyolefins are.
Die Aufgabe, die der Erfindung zugrundeliegt, besteht in der Schaffung einer spritz-, gieß- und/oder preßbaren Kunststoffmasse mit einem Füllstoff auf der Basis von Aluminiumpulverpartikeln, der folgenden Anforderungen gerecht wird:The object on which the invention is based consists in the creation of a sprayable, pourable and / or pressable Plastic compound with a filler based on Aluminum powder particles, the following requirements does justice:
- 1. Elektrische Isolation bei Durchschlagsspannungen ≦λτ100V,1. Electrical insulation at breakdown voltages ≦ λτ100V,
- 2. ausreichende Temperaturbeständigkeit (≦λτ120°C),2. sufficient temperature resistance (≦ λτ120 ° C),
- 3. hohe Wärmeleitfähigkeit (2...10 W/m.K),3. high thermal conductivity (2 ... 10 W / m.K),
- 4. ausreichende Scherfestigkeit bei der Verarbeitung und4. sufficient shear strength during processing and
- 5. einfache Herstellung der Partikel.5. Easy production of the particles.
Diese Aufgabe wird durch einen Füllstoff in einer Kunststoffmasse der eingangs genannten Art gelöst, der erfindungsgemäß durch folgende Merkmale gekennzeichnet ist:This task is accomplished by a filler in a plastic mass solved the type mentioned, the invention is characterized by the following features:
- a) Die Partikel aus Aluminium sind nahezu rund,a) The aluminum particles are almost round,
- b) sie weisen einen Durchmesser ≦ωτ200 µm auf undb) they have a diameter ≦ ωτ200 µm and
- c) sie enthalten allseitig eine chromatisierte Oberflächenschicht.c) they contain a chromated surface layer on all sides.
Aluminium wird wegen seiner Weichheit und die Chromatschicht wegen ihrer guten elektrischen Isolation verwendet (Schichten aus Oxiden, Hydroxiden und Phosphaten haben die Anforderungen nicht erfüllt). Aluminum is used because of its softness and the chromate layer used because of their good electrical insulation (Layers of oxides, hydroxides and phosphates have not met the requirements).
Da die an der Oberfläche der Aluminiumpulverpartikel erzeugte Chromatschicht auch eine gewisse Scherempfindlichkeit aufweist, liegt es im Rahmen der Erfindung, daß bei einem Verfahren zum Herstellen einer Kunststoffmasse auf der Basis von Thermoplasten der Füllstoff bei der Compoundierung mittels Extruder durch eine zweite Einzugszone direkt in die Schmelze dosiert wird. Eine Vorrichtung zur Durchführung des Compoundierens kann der deutschen Patentanmeldung P 35 14 854.3 (Doppelschnecken- Extruder) entnommen werden.Because the generated on the surface of the aluminum powder particles Chromate layer also a certain shear sensitivity has, it is within the scope of the invention that in a method for producing a plastic mass on the basis of thermoplastics the filler at the Compounding using an extruder through a second feed zone is dosed directly into the melt. A device to carry out the compounding German patent application P 35 14 854.3 (twin screw Extruder) are removed.
Beim Spritzgießen des Thermoplasten sind Punktangüsse, geringe Wanddicken und ähnliche, hohe Scherung verursachende Bereiche zu vermeiden.When injection molding the thermoplastic, there are point gates, small wall thicknesses and similar, high shear causing Avoid areas.
Bei thermoplastischer Verarbeitung ist für das elektrische Isolationsvermögen ausschlaggebend, daß keine zu großen, deutlich über ≦ωτ200 µm liegenden Partikel anwesend sind, da diese zerschert und damit "abisoliert" werden.With thermoplastic processing is for the electrical Isolation ability crucial that none too large particles well above ≦ ωτ200 µm present because it shatters and is therefore "stripped" will.
Nachfolgend soll die Erfindung anhand von zwei Ausführungsbeispielen noch näher erläutert werden:In the following, the invention is to be illustrated using two exemplary embodiments are explained in more detail:
- 1. Kunststoffmasse auf Epoxidharzbasis1. Plastic compound based on epoxy resin
- Aluminiumpulver (leicht oxidiert) mit einer Korngröße im Bereich von 180 µm wird durch Einbringen in eine Lösung von Chromsäure, Flußsäure und Salpetersäure (pH-Wert 1,95) unter Verwendung eines Magnetrührers an seiner Oberfläche chromatisiert (Schichtdicke 0,25 µm), anschließend gewaschen und getrocknet und in Epoxidharz eingemischt. An dem fertigen Produkt konnte eine Wärmeleitfähigkeit von 3,2 W/m.K bei einem elektrischen Durchgangswiderstand von 109 Ohm.m gemessen werden; das Produkt hielt eine elektrische Gleichspannung von ≦λτ500 V aus. Diese Werte wurden mit einem Volumenanteil von 47 % chromatisiertem Aluminium erzielt. Das Material ist preßfähig, aber nicht gießbar.Aluminum powder (slightly oxidized) with a grain size in the range of 180 microns is chromatographed on its surface (layer thickness 0.25 microns) by introducing it into a solution of chromic acid, hydrofluoric acid and nitric acid (pH 1.95) using a magnetic stirrer, then washed and dried and mixed in epoxy resin. A thermal conductivity of 3.2 W / mK with an electrical volume resistance of 10 9 Ohm.m could be measured on the finished product; the product withstood an electrical direct voltage of ≦ λτ500 V. These values were achieved with a volume fraction of 47% chromated aluminum. The material is pressable, but not pourable.
- 2. Kunststoffmasse auf Polyamidbasis2. Plastic mass based on polyamide
- Chromatisiertes Aluminiumpulver (Herstellung wie bei Ausführungsbeispiel 1) angegeben) wird in Polyamid 6 (=Polyamid mit 6 Kohlenstoffatomen in Monomeren) eingearbeitet, wobei die Scherung nicht zu hoch sein darf. An daraus im Spritzgießverfahren hergestellten Proben mit einem Volumenanteil von 40% chromatisiertem Aluminiumpulver wurde eine Wärmeleitfähigkeit von 2 W/m.K gemessen. Die Isolationswerte sind vergleichbar mit denen von Ausführungsbeispiel 1.Chromated aluminum powder (production as for Embodiment 1) is given) in polyamide 6 (= Polyamide with 6 carbon atoms in monomers), whereby the shear must not be too high. On samples made from it by injection molding with a volume share of 40% chromated aluminum powder a thermal conductivity of 2 W / m.K was measured. The insulation values are comparable to those of embodiment 1.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853522084 DE3522084A1 (en) | 1985-06-20 | 1985-06-20 | Plastic composition which is an electrical insulator and a good heat conductor and contains aluminium powder particles as filler, and a process for the preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853522084 DE3522084A1 (en) | 1985-06-20 | 1985-06-20 | Plastic composition which is an electrical insulator and a good heat conductor and contains aluminium powder particles as filler, and a process for the preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3522084A1 true DE3522084A1 (en) | 1987-01-02 |
Family
ID=6273742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853522084 Withdrawn DE3522084A1 (en) | 1985-06-20 | 1985-06-20 | Plastic composition which is an electrical insulator and a good heat conductor and contains aluminium powder particles as filler, and a process for the preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3522084A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4129572C1 (en) * | 1991-09-06 | 1992-12-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | Insulating compsn. for a nozzle in high tension switch - consisting of thermoplastic polymer e.g. polyether:imide and conductive polymer e.g. poly:pyrrole salt |
| DE4416403A1 (en) * | 1994-05-09 | 1995-11-23 | Schweizer Electronic Ag | Cooling system for printed circuit board |
| DE19854642A1 (en) * | 1998-11-26 | 2000-06-15 | Vacuumschmelze Gmbh | Electrical heating sink component for electrical systems, has improved heat sinking capacity provided plastic material filled with metal particles |
| US6735846B2 (en) | 2001-01-09 | 2004-05-18 | Black & Decker Inc. | Method for forming an electric motor having armature coated with a thermally conductive plastic |
| DE102008025484A1 (en) * | 2008-05-28 | 2009-12-03 | Siemens Aktiengesellschaft | Thermally conductive composite with aluminum powder, process for making the composite and use of the composite |
| US7685697B2 (en) | 2001-01-09 | 2010-03-30 | Black & Decker Inc. | Method of manufacturing an electric motor of a power tool and of manufacturing the power tool |
| US7814641B2 (en) | 2001-01-09 | 2010-10-19 | Black & Decker Inc. | Method of forming a power tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654521A (en) * | 1971-01-13 | 1972-04-04 | Gen Electric | Electronic card module thermal clip |
| WO1980001486A1 (en) * | 1977-12-06 | 1980-07-24 | Masaru Sasaki | Metal-containing synthetic resin molding material |
| DE3032744A1 (en) * | 1979-08-30 | 1981-03-19 | Showa Denko K.K., Tokyo | ELECTRICALLY INSULATING UNDERLAY WITH HIGH HEAT CONDUCTIVITY |
| US4326238A (en) * | 1977-12-28 | 1982-04-20 | Fujitsu Limited | Electronic circuit packages |
| DE3306731A1 (en) * | 1982-02-26 | 1983-09-08 | Mitsubishi Monsanto Chemical Co., Tokyo | THERMOPLASTIC RESIN COMPOUND WITH A CONTENT OF METAL FILM FRAGMENTS AND METHOD FOR THE PRODUCTION THEREOF |
| WO1984000720A1 (en) * | 1982-08-16 | 1984-03-01 | George M Kern | Resin compositions containing metals such as aluminum |
-
1985
- 1985-06-20 DE DE19853522084 patent/DE3522084A1/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654521A (en) * | 1971-01-13 | 1972-04-04 | Gen Electric | Electronic card module thermal clip |
| WO1980001486A1 (en) * | 1977-12-06 | 1980-07-24 | Masaru Sasaki | Metal-containing synthetic resin molding material |
| US4326238A (en) * | 1977-12-28 | 1982-04-20 | Fujitsu Limited | Electronic circuit packages |
| DE3032744A1 (en) * | 1979-08-30 | 1981-03-19 | Showa Denko K.K., Tokyo | ELECTRICALLY INSULATING UNDERLAY WITH HIGH HEAT CONDUCTIVITY |
| DE3306731A1 (en) * | 1982-02-26 | 1983-09-08 | Mitsubishi Monsanto Chemical Co., Tokyo | THERMOPLASTIC RESIN COMPOUND WITH A CONTENT OF METAL FILM FRAGMENTS AND METHOD FOR THE PRODUCTION THEREOF |
| WO1984000720A1 (en) * | 1982-08-16 | 1984-03-01 | George M Kern | Resin compositions containing metals such as aluminum |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4129572C1 (en) * | 1991-09-06 | 1992-12-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De | Insulating compsn. for a nozzle in high tension switch - consisting of thermoplastic polymer e.g. polyether:imide and conductive polymer e.g. poly:pyrrole salt |
| DE4416403A1 (en) * | 1994-05-09 | 1995-11-23 | Schweizer Electronic Ag | Cooling system for printed circuit board |
| DE4416403C2 (en) * | 1994-05-09 | 2000-07-13 | Schweizer Electronic Ag | Cooling device for a printed circuit board and method for producing such a cooling device |
| DE19854642A1 (en) * | 1998-11-26 | 2000-06-15 | Vacuumschmelze Gmbh | Electrical heating sink component for electrical systems, has improved heat sinking capacity provided plastic material filled with metal particles |
| DE19854642C2 (en) * | 1998-11-26 | 2003-02-20 | Vacuumschmelze Gmbh | Component with improved heat sink |
| US8324764B2 (en) | 2001-01-09 | 2012-12-04 | Black & Decker Inc. | Method for forming a power tool |
| US7685697B2 (en) | 2001-01-09 | 2010-03-30 | Black & Decker Inc. | Method of manufacturing an electric motor of a power tool and of manufacturing the power tool |
| US7814641B2 (en) | 2001-01-09 | 2010-10-19 | Black & Decker Inc. | Method of forming a power tool |
| US6735846B2 (en) | 2001-01-09 | 2004-05-18 | Black & Decker Inc. | Method for forming an electric motor having armature coated with a thermally conductive plastic |
| US8850690B2 (en) | 2001-01-09 | 2014-10-07 | Black & Decker Inc. | Method of forming a power tool |
| US8901787B2 (en) | 2001-01-09 | 2014-12-02 | Black & Decker Inc. | Method of forming a power tool |
| US8937412B2 (en) | 2001-01-09 | 2015-01-20 | Black & Decker Inc. | Method of forming a power tool |
| US8997332B2 (en) | 2001-01-09 | 2015-04-07 | Black & Decker Inc. | Method of forming a power tool |
| US9472989B2 (en) | 2001-01-09 | 2016-10-18 | Black & Decker Inc. | Method of manufacturing a power tool with molded armature |
| DE102008025484A1 (en) * | 2008-05-28 | 2009-12-03 | Siemens Aktiengesellschaft | Thermally conductive composite with aluminum powder, process for making the composite and use of the composite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AT200637B (en) | Connection and termination for high voltage cables | |
| RU2237303C2 (en) | Conducting thermoplastic elastomer and product of it | |
| DE2708194A1 (en) | ELECTROSTATICALLY APPLICABLE EPOXY POWDER ON A WIRE WITH LOW LOSS FACTOR | |
| DE3302552A1 (en) | ELECTRICALLY CONDUCTIVE ELEMENT, METHOD FOR THE PRODUCTION AND USE THEREOF | |
| DE2541670A1 (en) | REEL WITH RESIN PACKING | |
| DE60010515T2 (en) | CONDUCTIVE, NON-SILICON PASTE FOR THE ELECTRICAL INDUSTRY AND ITS USE | |
| DE3105138C2 (en) | Process for the manufacture of a high-voltage ignition cable | |
| EP1156711A1 (en) | Potting or moulding material with electromagnetic properties for building electronic component | |
| DE3522084A1 (en) | Plastic composition which is an electrical insulator and a good heat conductor and contains aluminium powder particles as filler, and a process for the preparation thereof | |
| DE102015223443A1 (en) | Electric device with a wrapping compound | |
| EP0144600B1 (en) | Manufacture of a plastic material | |
| DE69811780T2 (en) | Conductive filler, conductive paste and method of manufacturing a circuit body using the conductive paste | |
| EP0206254A2 (en) | Electrically insulating, heat-conducting polymer composition containing a filler | |
| DE2303624A1 (en) | INSULATING MATERIAL FOR COVERS | |
| DE2118135B2 (en) | Conductive polymer mixture | |
| DE10222459A1 (en) | Composite material for ultrahigh frequency screening, e.g. to protect electronics, contains ferrite powder modified with conductive polymer, electrically-conductive non-metallic particles and organic binder | |
| DE4311667A1 (en) | Vehicle headlight reflector and method of manufacturing the same | |
| EP0221434B1 (en) | Improving conductivity of plastics containing metallic fillers | |
| EP0085340B1 (en) | Electric isolations | |
| EP1645600B1 (en) | A granular electrically conductive filler for plastics | |
| DE102015116606B4 (en) | Process for producing a plastic component and plastic component | |
| DE102023109660A1 (en) | Thermally conductive injection molding material | |
| WO2001038084A1 (en) | Electroconductive composite plastic, component of such a composite plastic and method for producing the same | |
| EP0674326A2 (en) | Electrical conductor having an insulation of plastic material | |
| JPS61155456A (en) | Electromagnetic wave shielding composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8139 | Disposal/non-payment of the annual fee |