Conductive film, and transparent heating element

H - Electricity – 05 – B

Patent

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Details

H05B 3/10 (2006.01) B60J 1/00 (2006.01) H05B 3/12 (2006.01) H05B 3/20 (2006.01)

Patent

CA 2724223

Provided is a conductive film, which is suitably used in a heating element of a transparent property (a transparent heating element) excellent in visibility and a heating power. The conductive portion (12) of a first conductive film (10A) includes mesh patterns (22) having multiple intersecting points (intersecting portions (24)), which are constituted of a plurality of first metal filaments (12a) and a plurality of second metal filaments (12b), and the conductive portion (12) between the intersecting portions (24) is formed into an undulating shape having at least one curve. The first conductive film (10A) is shaped such that the curves are arcuate and two arcs (26) are formed continuously between the intersecting portions (24), wherein the protrusion-recess directions of the arcs (26) are opposite to each other. Each arc (26) has a center angle of about 90 degrees. Moreover, the conductive portion (12) has a crossing angle of about 90 degrees.

L'invention concerne un film conducteur qui est utilisé de façon appropriée dans un élément chauffant transparent présentant d'excellentes propriétés de visibilité et de puissance de chauffe. La partie conductrice (12) d'un premier film conducteur (10A) comporte des motifs de maillage (22) présentant plusieurs points d'intersection (24), lesquels motifs sont constitués d'une pluralité de premiers filaments métalliques (12a) et d'une pluralité de deuxièmes filaments métalliques (12b), la partie conductrice (12) entre les points d'intersection (24) présentant une forme ondulée comportant au moins une courbe. Le premier film conducteur (10A) présente une forme telle que les courbes sont arquées et que deux arcs (26) sont formés continuellement entre les points d'intersection (24), les courbures convexe-concave des arcs (26) étant opposées entre elles. Chaque arc (26) présente un angle au centre de 90 ° environ. En outre, la partie conductrice (12) présente un angle de croisement de 90 ° environ.

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