Thermally conductive molded resin article
Provided is a thermally conductive molded resin article that can be inexpensively mass-produced and that exhibits a low thermal resistance value as a result of reducing internal thermal resistance by high filling and reducing interfacial thermal resistance by improving cutting precision. The thermally conductive molded resin article is characterized by comprising a resin and thermally conductive fillers including a first thermally conductive filler and a second thermally conductive filler having a smaller particle size than the first thermally conductive filler. The thermally conductive molded resin article is also characterized in that: the first thermally conductive filler has an aspect ratio of 10 or more and is oriented approximately in the thickness direction of the thermally conductive molded resin article; the resin is a silicone resin, an acrylic rubber, or a fluororubber; and the second thermally conductive filler has a thermal conductivity surpassing 5 W/mK.
1. A thermally conductive molded resin sheet article having a length, a width, and a thickness perpendicular to the length and width, which comprises
a resin and
thermally conductive fillers including
a first thermally conductive filler and
a second thermally conductive filler having a smaller particle size than the first thermally conductive filler;
the first thermally conductive filler has an aspect ratio of 10 or more and is oriented in the thickness direction of the thermally conductive molded resin article;
the resin is a silicone resin, an acrylic rubber, or a fluororubber; and
the second thermally conductive filler has a thermal conductivity of more than 5 W/mK;
wherein a weld line of the resin is formed in the thickness direction of the thermally conductive molded resin article.
2. A method of forming a thermally conductive molded resin sheet article having a length, a width, and a thickness perpendicular to the length and width, comprising the steps of
providing a composition that comprises
a resin and
thermally conductive fillers including
a first thermally conductive filler and
a second thermally conductive filler having a smaller particle size than the first thermally conductive filler;
wherein
the first thermally conductive filler has an aspect ratio of 10 or more;
the resin is a silicone resin, an acrylic rubber, or a fluororubber; and
the second thermally conductive filler has a thermal conductivity of more than 5 W/mK, and
conducting extrusion molding of the composition to form a thermally conductive molded resin article,
wherein the first thermally conductive filler is oriented in the thickness direction of the thermally conductive molded resin article, and
wherein a weld line of the resin is formed in the thickness direction of the thermally conductive molded resin article.