| 摘要 |
<p>An antistatic flexible hose includes: a base layer (2) of relatively elastic plastic material, in which a first helical wire-like reinforcement part (5) with a preset pitch, made of rigid plastic, is embedded; antistatic devices constituted by a helical wire-like part (6) made of an electrically semiconducting plastic compound which is co-extruded together with the base layer (2) and is embedded therein. The semiconducting wire-like part (6) has the same pitch as the wire-like reinforcement part (5) and can be arranged outward or inward in a position which is adjacent and offset with respect to the reinforcement part (5) toward the inner surface (4) or outer surface (3) of the base layer (2), so as to be tangent to them or at least partially radially protrude inward or outward. The semiconducting body is constituted by a plastic matrix, made for example of ethylene and vinyl acetate copolymers, in which a solid material with a relatively low electrical resistivity, for example a carbon black-based powder, is dispersed.</p> |
