プリプレグの処理方法及び成形品の製造方法

An object of the present invention is to provide a method for producing a prepreg that can obtain a prepreg that can suppress the formation of pinholes on the surface of a molded product. A method for manufacturing a prepreg in which reinforcing fibers are impregnated with a matrix resin, wherein a prepreg (18) in which a reinforcing fiber base material is impregnated with a matrix resin composition is sandwiched between a first sheet (10) and a second sheet (16). A method for producing a prepreg, comprising a reduced pressure heating step of reducing the pressure at a relative pressure of -101.0 to -98.0 kPa while heating the laminated body 1 at 65 to 85°C. [Selection drawing] Fig. 2【課題】成形品の表面のピンホール形成を抑制できるプリプレグが得られるプリプレグの製造方法を提供することを目的とする。【解決手段】強化繊維にマトリックス樹脂が含浸されたプリプレグの製造方法であって、強化繊維基材にマトリックス樹脂組成物を含浸したプリプレグ18が**のシート10と第二のシート16で挟まれた積層体1を、65~85℃で加熱しながら、相対圧力-101.0~-98.0kPaで減圧する減圧加熱工程を有する、プリプレグの製造方法。【選択図】図2