Patent ID: 7998348
Filing Date: 2011-08-16
Classification: B01D

Abstract:
1. A process for producing a spiral membrane element comprising a step of forming a cylindrical roll by spirally winding a separation membrane a feed-side flow passageway member, and a permeate-side flow passageway member in a laminate state around a perforated center tube and a step of forming a sealing part fbr preventing mixing of feed-side fluid and permeate-side fluid, wherein a material extended to the back end side of the winding or a material having a fiber cloth connected to the back end side of the winding in which a resin is applied to the extended material or the fiber cloth, is used as at least one sheet of the permeate-side flow passageway member among said permeate-side flow passageway member and said resin is hardened after said extended material or fiber cloth is wound on the outer circumference of said cylindrical roll in forming said cylindrical roll; wherein said fiber cloth is wound together with a peeling sheet having a peeling property to said resin, and an interface of said peeling sheet is peeled off after said resin is hardened, thereby to cut and remove the peeled off part.