Spiral-wound gas separation membrane element, gas separation membrane module, and gas separation apparatus

A separation membrane-flow channel member composite body comprising a gas separation membrane, and a flow channel member that forms a gas flow channel, wherein

• the gas separation membrane includes
• a first porous layer, and
• a hydrophilic resin composition layer,
• the flow channel member
• has four end portions, and
• is provided with a first cover that covers one end portion of the four end portions,
• the flow channel member is sandwiched in the gas separation membrane which is folded, and
• the first cover is located closest to a turn-back part of the folded gas separation membrane.

A method for manufacturing a spiral-wound gas separation membrane element comprising a perforated central tube and a laminated body wound around the central tube, wherein

• the laminated body includes a separation membrane-flow channel member composite body,
• the separation membrane-flow channel member composite body includes
• a gas separation membrane, and
• a flow channel member that forms a gas flow channel,
• the gas separation membrane includes
• a first porous layer, and
• a hydrophilic resin composition layer,
• the flow channel member
• has four end portions, and
• is provided with a first cover that covers one end portion of the four end portions,
• the gas separation membrane is folded with the first porous layer being located outside the hydrophilic resin composition layer,
• the flow channel member is sandwiched in the folded gas separation membrane, and
• the first cover is located closest to a turn-back part of the folded gas separation membrane, and wherein
• the method comprises:
• a step of providing the first cover on the flow channel member;
• and
• a step of producing the separation membrane-flow channel member composite body by disposing the first cover of the flow channel member closest to the turn-back part.