Patent ID: 9597640
Date: 2017-03-21
CPC Classifications: B01D

Claim:
1. A spiral separation membrane element comprising: a water collection tube; a separation membrane wound around the water collection tube, having a feed-side surface and a permeate-side surface, including a band-shaped region on at least one end of the feed-side surface in an axial direction of the water collection tube, and arranged such that the feed-side surfaces are opposed to each other; and a channel material fused to the band-shaped region and comprising a plurality of resin bodies arranged by fusion at intervals in the band-shaped region such that the plurality of resin bodies are arranged as stripes, and the channel material is arranged such that the resin bodies provided on the feed-side surfaces opposed to each other are overlaid on each other; and wherein the channel material is arranged only in at least one of areas within 20% of the width of the separation membrane from edges of the separation membrane in the longitudinal direction of the water collection tube; wherein the resin body has a shape which is longer in one direction, and arranged such that longitudinal directions of the resin bodies are overlaid on each other to cross one another.