| abstract |
A piercing needle having a low piercing resistance evennif repeatedly caused to pierce is provided. The piercing needlenhas an undercoat of a silane coupling agent, preferably, an aminongroup-containing alkoxysilane or an epoxy group-containingnalkoxysilane, and an outer surface of a mixture of (1) a reactivensilicone such as a reaction product of an amino group-containingnalkoxysilane, an epoxy group-containing alkoxysilane and ansilicone having silanol groups at both terminal ends, with (2)na non-reactive silicone. |