Conductive coating material and circuit former
A conductive coating material includes a silicone resin (A), and a conductive powder (B) at a specific mass ratio, in which the conductive powder (B) includes a flake-shaped conductive powder (B1) having an average particle size of 1 to 7 μm and an amorphous conductive powder (B2) having an average particle size of 1 to 6 μm at a specific mass ratio, and Expression (1) below is satisfied, 100≤X1+X2≤260 (1), X1=(the average particle size of the conductive powder (B1)/a tap density of the conductive powder (B1))×(a content of the conductive powder (B1) with respect to a total mass of the conductive powder (B)), X2=(the average particle size of the conductive powder (B2)/a tap density of the conductive powder (B2))×(a content of the conductive powder (B2) with respect to the total mass of the conductive powder (B)).
1. A conductive coating material, comprising:
a silicone resin (A); and
a conductive powder (B),
wherein a mass ratio (A/B) of the silicone resin (A) to the conductive powder (B) is 10/90 to 35/65,
the conductive powder (B) includes a flake-shaped conductive powder (B1) having an average particle size of 1 to 7 μm and an amorphous conductive powder (B2) having an average particle size of 1 to 6 μm,
a mass ratio (B1/B2) of the conductive powder (B1) to the conductive powder (B2) is 40/60 to 90/10, and Expression (1) below is satisfied,
100≤ X 1+ X 2≤260 (1),
X1=(the average particle size of the conductive powder (B1)/a tap density of the conductive powder (B1))×(a content of the conductive powder (B1) with respect to a total mass of the conductive powder (B)),
X2=(the average particle size of the conductive powder (B2)/a tap density of the conductive powder (B2))×(a content of the conductive powder (B2) with respect to the total mass of the conductive powder (B)).
2. A circuit former comprising:
a substrate; and
a circuit,
wherein the circuit is formed on the substrate from a coating film obtained by using the conductive coating material according to claim 1 .