Fiber sheet, electrospinning device, and method for manufacturing fiber sheet

A system for electrospinning a fiber sheet comprising:

• a collecting medium on which the fiber sheet is deposited;
• a plurality of nozzles to discharge a spinning solution including a resin, the nozzles facing the collecting medium;
• a plurality of power sources to apply charges to the spinning solution;
• and
• a plurality of electrodes, distant from the plurality of nozzles, to generate an electric field between the plurality of nozzles, wherein
• the plurality of power sources applies different voltages associated with the different charges to the spinning solution discharged from the plurality of nozzles, respectively,
• the plurality of nozzles include one or more nozzles belonging to a first nozzle group and one or more nozzles belonging to a second nozzle group different from the first nozzle group,
• the one or more nozzles that belong to the first nozzle group and the one or more nozzles that belong to the second nozzle group are adjacent to each other,
• the plurality of electrodes includes one or more electrodes belonging to a first electrode group and one or more electrodes belonging to a second electrode group different from the first electrode group, and
• the different voltages are applied to the spinning solution such that a first polarity of a first voltage applied to the one or more electrodes belonging to the first electrode group and a second polarity of a second voltage applied to the one or more electrodes belonging to the second electrode group are different from each other.