PREPREG AND PRODUCTION METHOD THEREFOR, SLIT TAPE PREPREG, CARBON FIBER-REINFORCED COMPOSITE MATERIAL

A prepreg having high processability and laminating performance and a method to produce such a prepreg in an industrially advantageous way is described, the prepreg comprising at least the components [A] to [E] shown below, and having a structure incorporating a first layer composed mainly of the component [A] and a first epoxy resin composition that contains the components [B] to [D] but which is substantially free of the component [E], and a second layer composed mainly of a second epoxy resin composition that contains the components [B] to [E] and which is disposed adjacent to each surface of the first layer, the second epoxy resin composition being characterized in that its component [D] has a weight-average molecular weight of 2,000 to 30,000 g/mol and accounts for 5 to 15 parts by mass relative to the total quantity of its components [B] to [E], which accounts for 100 parts by mass,[A] carbon fiber,[B] epoxy resin,[C] curing agent,[D] thermoplastic resin, and[E] particles containing a thermoplastic resin as primary component and having a volume-average particle diameter of 5 to 50 μm.