Fiber substrate stacking method, manufacturing method of roll of fiber substrate group, fiber substrate group, and aircraft
The present invention aims to sufficiently impregnate each layer of a fiber substrate group composed of fiber substrates, which are used for fiber-reinforced resin molding by a resin injection method, with a resin. To successively stack a plurality of fiber substrates, each of which has arrayed fiber bundles and is a material composing a fiber-reinforced resin along with a resin, with their fiber bundles oriented in the same direction, the plurality of fiber substrates are integrated in a state where border zones between the fiber bundles adjacent to each other in an array direction are aligned with one another among the fiber substrates.
1. A fiber substrate stacking method for stacking a plurality of fiber substrates each of which has arrayed fiber bundles and is a material composing a fiber-reinforced resin along with a matrix resin, wherein the plurality of fiber substrates are integrated in a state where border zones between the fiber bundles adjacent to each other in an array direction are aligned with one another among the fiber substrates which are successively stacked with their fiber bundles oriented in a same direction.
2. The fiber substrate stacking method according to claim 1 , wherein the plurality of fiber substrates are bonded together by heating and plasticizing particles of a thermoplastic resin scattered over surfaces of the fiber bundles.
3. The fiber substrate stacking method according to claim 1 , wherein the plurality of fiber substrates are bonded together by disposing a sheet, which has thermoplasticity and allows passage of the matrix resin at least in a thickness direction of the fiber substrates, between the fiber substrates and heating and plasticizing the sheet.
4. The fiber substrate stacking method according to claim 1 , wherein the fiber bundles are arrayed at a regular pitch.
5. The fiber substrate stacking method according to claim 1 , wherein:
the fiber substrate has a first fiber and a second fiber that hold together the fiber bundles in an arrayed state; and
the first fiber extends along a length direction of the fiber bundles at the position of a border zone while the second fiber extends along the array direction of the fiber bundles.
6. The fiber substrate stacking method according to claim 1 , wherein the arrayed fiber bundles of the fiber substrate are aligned in one direction, and the border zones of stacked adjacent fiber substrates are aligned in a stacking direction.
7. The fiber substrate stacking method according to claim 1 , wherein a border zone of each of the fiber substrates includes a channel that is formed in a thickness direction of a stacked body comprising the stacked plurality of fiber substrates, the channel configured for passage of the matrix resin.