Patent ID: 9604179
Date: 2017-03-28
CPC Classifications: B01D,C02F

Claim:
1. A spiral membrane element comprising: a cylindrical wound body in which a separation membrane, a feed-side channel material, and a permeate-side channel material in a laminated state are wound in a spiral form around a center tube having a hole; and a sealing part for preventing feed-side fluid and permeate-side fluid from being mixed with each other, wherein a fiber reinforced resin layer having a reinforcing fiber layer and a strengthening fiber layer embedded with the same resin is provided on an outer circumferential side of the cylindrical wound body, wherein one direction of fibers in the reinforcing fiber layer is disposed in a length direction of the spiral membrane element, and wherein the reinforcing fiber layer comprises a fiber cloth having a mass of 80 to 500 g/m wherein the the spiral membrane element is configured for intake and output water to flow in the length direction, and wherein the spiral membrane element has an elongation ratio of 0.14% or less after storage for three months in a humid state at 40° C.