TOW PREPREG, COMPOSITE MATERIAL-REINFORCED PRESSURE VESSEL, AND METHOD OF PRODUCING COMPOSITE MATERIAL-REINFORCED PRESSURE VESSEL

摘要

Provided are the following: a tow prepreg which exhibits excellent draping properties and tackiness, exhibits little stickiness, can be unwound at high speed, and is obtained by impregnating a reinforcing fiber bundle with a matrix resin composition which contains component (A) (an epoxy resin), component (B) (dicyandiamide), component (C) (a curing accelerator) and component (D) (core-shell type rubber particles), in which the content of component (D) relative to component (A) is 20-70 parts by mass relative to 100 parts by mass of component (A), which has a viscosity at 30°C of 3-80 Pa·sec, and which has a minimum viscosity, as obtained when carrying out viscosity measurements by increasing the temperature from room temperature to 130°C at a rate of temperature increase of 2ºC/min, of 0.04-1 Pa·sec; and a composite material-reinforced pressure vessel which is obtained by using the tow prepreg, has few voids in a reinforcing layer, has a high burst pressure, and has an excellent external appearance due to an appropriate degree of resin flow.