PREPREG CURING METHOD FOR PREPARING COMPOSITE MATERIAL HAVING EXCELLENT SURFACE FINISH AND HIGH FIBER CONSOLIDATION

To provide a prepreg curing method for preparing a composite material having excellent surface finish and high fiber consolidation.SOLUTION: There is provided a method for curing a prepreg, comprising: a step of preparing a prepreg containing a thermosetting resin composition and a fiber; a step of placing the prepreg under reduced pressure; a step of exposing the prepreg in enough time to remove all of the volatile substances remained in the prepreg under reduced pressure at a first rising temperature; optionally, a step of exposing the prepreg in enough time to remove all of the volatile substances remained in the prepreg under reduced pressure at a second rising temperature; a step of exposing the prepreg in enough time to cure the prepreg under reduced pressure at a third rising temperature; and a step of exposing the prepreg cured at a fourth rising temperature condition lower than the one or more of the first, second and third rising temperature conditions under reduced pressure or unreduced pressure.SELECTED DRAWING: None 【課題】優れた表面仕上げおよび高い繊維圧密を有する複合材料を調製するためのプレプレグ硬化方法の提供。【解決手段】プレプレグを硬化させるための方法であって、熱硬化性樹脂組成物および繊維を含むプレプレグを用意する工程と、プレプレグを減圧下に置く工程と、プレプレグ中の実質的にすべての揮発性物質を除くのに十分な時間、プレプレグを減圧下で第１の上昇した温度に曝露する工程と、任意に、プレプレグ中に残存するすべての揮発性物質を除くのに十分な時間、プレプレグを減圧下で第２の上昇した温度に曝露する工程と、プレプレグを硬化させるのに十分な時間、プレプレグを減圧下で第３の上昇した温度に曝露する工程と、第１、第２または第３の上昇した温度条件のいずれか１つまたは複数より低い第４の上昇した温度条件に硬化されたプレプレグを減圧下または減圧されていない圧力下で曝露する工程とを含む。【選択図】なし