FR2436481A1 - ELECTRIC DEVICE COMPRISING AN ELEMENT WITH POSITIVE TEMPERATURE CHARACTERISTICS AND A CONSTANT WATTAGE ELEMENT - Google Patents

ELECTRIC DEVICE COMPRISING AN ELEMENT WITH POSITIVE TEMPERATURE CHARACTERISTICS AND A CONSTANT WATTAGE ELEMENT

Info

Publication number
FR2436481A1
FR2436481A1 FR7923116A FR7923116A FR2436481A1 FR 2436481 A1 FR2436481 A1 FR 2436481A1 FR 7923116 A FR7923116 A FR 7923116A FR 7923116 A FR7923116 A FR 7923116A FR 2436481 A1 FR2436481 A1 FR 2436481A1
Authority
FR
France
Prior art keywords
positive temperature
millimicrons
constant wattage
electric device
temperature characteristics
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7923116A
Other languages
French (fr)
Other versions
FR2436481B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raychem Corp
Original Assignee
Raychem Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raychem Corp filed Critical Raychem Corp
Publication of FR2436481A1 publication Critical patent/FR2436481A1/en
Application granted granted Critical
Publication of FR2436481B1 publication Critical patent/FR2436481B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Thermistors And Varistors (AREA)
  • Conductive Materials (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne des dispositifs électriques, qui comprennent un élément à caractéristiques positives de température (PTC) composé d'une composition polymère conductrice PTC et un élément à wattage constant CW contigu qui est composé d'une composition polymère conductrice. Selon l'invention, on obtient des résultats particulièrement bons si la composition CW comprend un polymère thermoplastique organique et un noir de carbone conducteur ayant une grosseur de particules D en millimicrons et une surface spécifique S en m**2/g telles que le rapport S/D soit au moins 10. D est de préférence inférieur à 27 millimicrons, spécialement inférieur à 18 millimicrons. S/D est de préférence au moins 12, spécialement au moins 18. Des dispositifs particulièrement utiles sont sous la forme de réchauffeurs.Provided are electrical devices, which include a positive temperature characteristic (PTC) element composed of a conductive polymer composition PTC and a contiguous CW constant wattage element which is composed of a conductive polymer composition. According to the invention, particularly good results are obtained if the composition CW comprises an organic thermoplastic polymer and a conductive carbon black having a particle size D in millimicrons and a specific surface area S in m ** 2 / g such that the ratio S / D is at least 10. D is preferably less than 27 millimicrons, especially less than 18 millimicrons. S / D is preferably at least 12, especially at least 18. Particularly useful devices are in the form of heaters.

FR7923116A 1978-09-18 1979-09-17 ELECTRIC DEVICE COMPRISING AN ELEMENT WITH POSITIVE TEMPERATURE CHARACTERISTICS AND A CONSTANT WATTAGE ELEMENT Granted FR2436481A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US94365978A 1978-09-18 1978-09-18

Publications (2)

Publication Number Publication Date
FR2436481A1 true FR2436481A1 (en) 1980-04-11
FR2436481B1 FR2436481B1 (en) 1984-06-29

Family

ID=25480041

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7923116A Granted FR2436481A1 (en) 1978-09-18 1979-09-17 ELECTRIC DEVICE COMPRISING AN ELEMENT WITH POSITIVE TEMPERATURE CHARACTERISTICS AND A CONSTANT WATTAGE ELEMENT

Country Status (5)

Country Link
JP (1) JPS5595203A (en)
CA (1) CA1133085A (en)
DE (1) DE2937708A1 (en)
FR (1) FR2436481A1 (en)
GB (1) GB2033707B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3175202D1 (en) * 1980-04-21 1986-10-02 Raychem Corp Conductive polymer compositions containing fillers
US4591700A (en) * 1980-05-19 1986-05-27 Raychem Corporation PTC compositions
CA1168433A (en) * 1980-05-19 1984-06-05 Umesh K. Sopory Ptc conductive polymers and devices comprising them
DE19842125A1 (en) * 1998-09-15 2000-03-23 Moeller Gmbh Contact arrangement used in electrical switches and protective devices has intermediate layer made of conducting elastomeric material between contact electrodes and electrically conducting polymer
JP2008204695A (en) * 2007-02-19 2008-09-04 Matsushita Electric Works Ltd Illumination device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2543314A1 (en) * 1974-09-27 1976-04-15 Raychem Corp LAYERED, SELF-REGULATING HEATING ELEMENTS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2543314A1 (en) * 1974-09-27 1976-04-15 Raychem Corp LAYERED, SELF-REGULATING HEATING ELEMENTS
FR2286575A1 (en) * 1974-09-27 1976-04-23 Raychem Corp SELF-REGULATING STRATIFIED HEATING ARTICLE

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/58 *

Also Published As

Publication number Publication date
DE2937708A1 (en) 1980-03-27
GB2033707A (en) 1980-05-21
CA1133085A (en) 1982-10-05
GB2033707B (en) 1982-12-01
FR2436481B1 (en) 1984-06-29
JPS5595203A (en) 1980-07-19

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Legal Events

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