Abstract: Provided is a fluororesin tube having excellent properties such as heat resistance, weather resistance, chemical resistance, peeling properties, and low dielectric properties that are specific to a fluororesin and also having an inner surface that has high adhesiveness with respect to different materials, particularly, silicone rubber. A fluororesin tube is provided, in which an inner surface of the tube is subjected to plasma treatment by introducing vinylalkoxysilane into a plasma excitation gas, and an arithmetic average roughness Ra and an average length RSm of a roughness curve element with respect to the inner surface of the tube which is subjected to the plasma treatment satisfy Ra<0.08 ?m and RSm<25 ?m.

Abstract: Provided is a fluororesin tube having excellent properties such as heat resistance, weather resistance, chemical resistance, peeling properties, and low dielectric properties that are specific to a fluororesin and also having an inner surface that has high adhesiveness with respect to different materials, particularly, silicone rubber. A fluororesin tube is provided, in which an inner surface of the tube is subjected to plasma treatment by introducing vinylalkoxysilane into a plasma excitation gas, and an arithmetic average roughness Ra and an average length RSm of a roughness curve element with respect to the inner surface of the tube which is subjected to the plasma treatment satisfy Ra<0.08 ?m and RSm<25 ?m.