METHOD FOR PRODUCING PREPREG

PROBLEM TO BE SOLVED: To provide a method for producing a prepreg containing a plurality of reinforcement fibers and thermoplastic resin which is excellent in bending characteristics and compression characteristics.SOLUTION: A method for producing a prepreg containing thermoplastic resin and a plurality of continuous reinforcement fibers by passing the plurality of continuous reinforcement fibers through a tank containing the thermoplastic resin, where a space volume Vd[m] in the tank and a supply volume Qe[m/s] of the thermoplastic resin to the tank per unit time satisfy the following expression (A): 10≤Vd/Qe≤9,000.SELECTED DRAWING: Figure 1 【課題】複数の強化繊維、及び熱可塑性樹脂を含むプリプレグの製造方法において、曲げ特性、圧縮特性に優れたプリプレグの製造方法を提供する。【解決手段】熱可塑性樹脂を含む槽に複数の連続強化繊維を通過させることにより、熱可塑性樹脂と複数の連続強化繊維を含むプリプレグを製造する方法において、槽内の空間体積Ｖｄ[ｍ３]と、単位時間当たりの槽への熱可塑性樹脂の供給体積Ｑｅ[ｍ３／ｓ]とが、下記の（Ａ）式を満たすことを特徴とする、プリプレグの製造方法。１０ ≦ Ｖｄ／Ｑｅ ≦ ９０００ ・・・(Ａ) 式【選択図】図１