Abstract: A method of RTM molding includes placing a reinforcing fiber substrate in a mold, placing resin distribution media exhibiting a resin flow resistance lower than a resin flow resistance of said reinforcing fiber substrate on both surfaces of said reinforcing fiber substrate, and after pressure in said mold is reduced by evacuation, injecting a resin into said mold through said resin distribution media to impregnate said reinforcing fiber substrate with said resin injected, wherein resin flow resistance of a first resin distribution medium placed on a first surface of said reinforcing fiber substrate is lower than resin flow resistance of a second resin distribution medium placed on a second surface of said reinforcing fiber substrate, and said evacuation is carried out through said second resin distribution medium while said resin is injected into said first resin distribution medium to impregnate said reinforcing fiber substrate with said resin injected.

Abstract: A method of RTM molding including laminating a plurality of reinforcing fiber materials in a mold to form a reinforcing fiber material laminate, and impregnating a resin into said reinforcing fiber material laminate by injecting a resin in a direction from an end surface of said reinforcing fiber material laminate along a laminate surface while reducing pressure in said mold by evacuation.

Abstract: A method of RTM molding including placing a reinforcing fiber substrate in a mold, placing a resin distribution medium having a resin flow resistance lower than a resin flow resistance of said reinforcing fiber substrate on a surface of said reinforcing fiber substrate opposite said mold, providing a degasification medium comprising a gas permeation film and a gas permeable substrate between said reinforcing fiber substrate and said mold, and injecting a resin into said mold through said resin distribution medium after pressure in said mold is reduced by evacuation, whereby the injected resin is impregnated into said reinforcing fiber substrate by evacuating said resin injected from a degasification space formed between said gas permeation film and said mold.

Abstract: A method of RTM molding wherein a reinforcing fiber substrate is placed in a mold, each of a first and a second resin distribution media exhibiting a resin flow resistance lower than the resistance of the reinforcing fiber substrate is placed on each surface of the reinforcing fiber substrate, and the inside of the mold is evacuated and a resin is injected into the mold to thereby impregnate the reinforcing fiber substrate with the resin injected, characterized in that the first resin distribution medium exhibits a resin flow resistance lower than that of the second resin distribution medium, and the evacuation is carried out through the second resin distribution medium while the resin is injected through the first resin distribution medium. The method can be advantageously employed for producing, in particular, FRP structure which is thick and excellent in designability, lightweight property and/or strength.

Abstract: A method of RTM molding wherein a reinforcing fiber substrate is placed in a mold, each of a first and a second resin distribution media exhibiting a resin flow resistance lower than the resistance of the reinforcing fiber substrate is placed on each surface of the reinforcing fiber substrate, and the inside of the mold is evacuated and a resin is injected into the mold to thereby impregnate the reinforcing fiber substrate with the resin injected, characterized in that the first resin distribution medium exhibits a resin flow resistance lower than that of the second resin distribution medium, and the evacuation is carried out through the second resin distribution medium while the resin is injected through the first resin distribution medium. The method can be advantageously employed for producing, in particular, FRP structure which is thick and excellent in designability, lightweight property and/or strength.