Title:
PTC HEATING UNIT
Document Type and Number:
Japanese Patent JPH0547454
Kind Code:
A
Abstract:
PURPOSE: To provide a PTC heating unit having the capability of showing stable PTC characteristics even at a high temperature (e.g. 200°C or higher).
CONSTITUTION: Two or more electrodes 2 and 2 are so buried as to be near each other and bridged in a conductive composite 1 comprising a mixture of a conductivity imparting addition material and crystalline monomer containing at least one ethylenic double bond with crystalline polymer. In this constitution, stable PTC characteristics with a less change in resistance value can be provided, even in use at a high temperature such as 200°C, due to the existence of the monomer containing the ethylenic double bond.
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Inventors:
NAKAYAMA KUNIYUKI
KUROSAWA YUKIHIKO
YAMADA MAKOTO
KUROSAWA YUKIHIKO
YAMADA MAKOTO
Application Number:
JP22520191A
Publication Date:
February 26, 1993
Filing Date:
August 09, 1991
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
C08K3/04; C08K3/00; C08K5/00; C08L27/12; H01C7/02; H05B3/14; H05B3/56; (IPC1-7): C08K3/04; C08K5/00; C08L27/12; H01C7/02; H05B3/14; H05B3/56
Attorney, Agent or Firm:
Shigetoku Ishitoya
Next Patent: CERAMIC HEATER