Stitched fiber-reinforced substrate material, preform material, fiber reinforced composite material, and manufacturing method for same

2:

• The stitched fiber-reinforced substrate material according to claim 1, wherein the reinforcement fiber sheet is a reinforcement fiber sheet made of unidirectionally drawn and aligned reinforcement fiber.

3:

• The stitched fiber-reinforced substrate material according to claim 1, wherein the reinforcement fiber sheet is formed by laminating a reinforcement fiber sheet made of unidirectionally drawn and aligned reinforcement fiber layer by layer by altering the fiber axial direction.

4:

• The stitched fiber-reinforced substrate material according to claim 1, wherein the organic compound having a polar group is a compound having a polyoxyalkylene structure.

5:

• The stitched fiber-reinforced substrate material according to claim 1, wherein the organic compound having a polar group is a compound having an epoxy group.

6:

• The stitched fiber-reinforced substrate material according to claim 1, wherein the stitching yarn is a stitching yarn in which an organic compound having a polar group is adhered in an amount of 0.1 to 10 wt % with respect to the mass of the stitching yarn.

7:

• The stitched fiber-reinforced substrate material according to claim 1, wherein the stitching yarn has a linear expansion coefficient in the fiber axial direction of −1×10−6 to 70×10−6/K after heated at 180° C. for 2 hours and then cooled.

8:

• A method for manufacturing a stitched fiber-reinforced substrate material, comprising:
• stitching a reinforcement fiber sheet made of reinforcement fiber using stitching yarns to which an organic compound having a polar group is adhered.

9:

• A preform material comprising:
• the stitched fiber-reinforced substrate material according to claim 1 and a binder resin of 1 to 20 parts by mass with respect to 100 parts by mass of the stitched fiber-reinforced substrate material.

10:

• A method for manufacturing a preform material comprising:
• heating the stitched fiber-reinforced substrate material according to claim 1 and a binder resin under pressure.

11:

• A fiber reinforced composite material comprising:
• the stitched fiber-reinforced substrate material according to claim 1 and a matrix resin formulation of 20 to 60 parts by mass with respect to 100 parts by mass of the stitched fiber-reinforced substrate material.

12:

• A method for manufacturing a fiber reinforced composite material comprising:
• impregnating a matrix resin into the stitched fiber-reinforced substrate material according to claim 1.

13:

• The stitched fiber-reinforced substrate material according to claim 2, wherein the reinforcement fiber sheet is formed by laminating a reinforcement fiber sheet made of unidirectionally drawn and aligned reinforcement fiber layer by layer by altering the fiber axial direction.