METHOD AND APPARATUS FOR PRODUCING FIBER SHEET

To provide a method and apparatus for producing a fiber sheet, capable of simultaneously suppressing charge repulsion between nozzles and reducing trim of a substrate between fiber sheets when forming a plurality of fiber sheets on the substrate using a plurality of nozzles in an electrospinning method.SOLUTION: The method for producing a fiber sheet in which raw material liquids are discharged from a plurality of nozzles and then fibers are deposited on a substrate by an electrospinning method, includes a pattern spinning step of forming a pattern in which a plurality of fiber sheets is arranged in a predetermined form on the substrate by: setting a conveying unit region including a plurality of planned fiber deposition regions on the substrate; intermittently conveying the conveying unit region in a machine flow direction and sequentially advancing the same to a plurality of spinning positions classified in the machine flow direction; and conducting spinning by the nozzles on the planned fiber deposition region at each of the spinning positions. In performing the pattern spinning step, the nozzles are arranged for each of the spinning positions to correspond to the planned fiber deposition regions; the minimum distance A between the nozzles is set larger than the minimum distance X between the plurality of fiber sheets arranged in the predetermined form to be finally obtained; the nozzles are arranged between the spinning positions so that they do not face an area of the fiber sheet formed at the previous spinning position; and the spun fibers are deposited in different planned fiber deposition regions in the conveying unit region at each of the spinning positions, thereby forming a pattern in which the plurality of fiber sheets is positioned in the predetermined form.SELECTED DRAWING: None 【課題】電界紡糸法において複数のノズルを用いて複数の繊維シートを基材上に形成する際に、ノズル間の電荷反発の抑制と、繊維シート間の基材のトリムの削減とを同時に実現することができる、繊維シートの製造方法及び製造装置を提供する。【解決手段】複数のノズルから原料液を吐出し、電界紡糸法により基材上に繊維を堆積させる繊維シートの製造方法であって、前記基材に複数の繊維堆積予定領域を含んだ搬送単位領域を設定し、該搬送単位領域を機械流れ方向に間欠搬送して該機械流れ方向に区分された複数の紡糸位置へと順次進ませ、前記紡糸位置毎に前記繊維堆積予定領域に対して前記ノズルによる紡糸を行って、前記基材上に、複数の繊維シートを所定配置した型を形成するパターン紡糸工程を有し、前記パターン紡糸工程を行うに当たり、前記紡糸位置毎に前記ノズルを前記繊維堆積予定領域に対応させて配置し、ノズル間の最小距離Ａを、最終的に得られる前記所定配置された前記複数の繊維シート間の最小距離Ｘよりも広く設定し、前記紡糸位置間で、前記ノズルを、前の紡糸位置にて形成した前記繊維シートの領域と対向しないように配置して、前記紡糸位置毎に前記搬送単位領域内の異なる繊維堆積予定領域に紡糸繊維を堆積させて、前記複数の繊維シートを所定配置した型を形成する、繊維シートの製造方法。【選択図】なし