Full-dry loose tube, manufacturing method and manufacturing apparatus thereof, and optical cable

A manufacturing apparatus of a full-dry loose tube, comprising:

• a releasing device;
• an optical-element electrostatic polarization device, disposed downstream of the releasing device, and performing electrostatic polarization on an optical element which enters the optical-element electrostatic polarization device;
• a coupling device, disposed downstream of the optical-element electrostatic polarization device, and receiving the optical element which is electrostatically polarized by the optical-element electrostatic polarization device;
• a water-blocking-powder electrostatic polarization device, connected to the coupling device, and delivering water-blocking powder which is electrostatically polarized to the coupling device, for coupling with the optical element to form an optical fiber bundle, wherein polarity of the optical element is opposite to polarity of the water-blocking powder;
• an extruder, receiving the optical fiber bundle and covering the optical fiber bundle with a plastic layer;
• a vacuum water tank, disposed downstream of the extruder, and rounding the optical fiber bundle which is covered with the plastic layer to form the loose tube;
• and
• a cooling water tank, cooling the loose tube which is rounded.