Fiber reinforced resin base sheet and method for confirming internal flow of fiber reinforced resin base sheet

摘要

PROBLEM TO BE SOLVED: To confirm, with good accuracy, the flow condition of a resin and the movement condition of long fiber in the inside of a product formed through laminating plural fiber-reinforced resin base material sheets into a lamination and applying press-work to the lamination into a prescribed shape.SOLUTION: A fiber-reinforced resin base material sheet 11 is formed into a sheet shape with a resin including long fiber 12, and is press-worked into a prescribed shape in a state of being laminated into a plurality of layers. Since a marking (a grid shape 13) from which the movement of the long fiber 12 can be read is printed on at least either surface of the fiber-reinforced resin base material sheet 11 with ink including an X-ray impermeable material, by imaging the marking (the grid shape 13) of a press-worked product 14 with an X ray, the flow condition of the resin of the fiber-reinforced resin base material sheet 11 printed with the marking (the grid shape 13), namely, the movement condition of the long fiber 12 at an arbitrary position in the inside of the product 14 can be confirmed with good accuracy.SELECTED DRAWING: Figure 1